Deposit Unlock Scheme for New Build Homes: How to Buy with Just 5% Deposit Without Help to Buy

What Is the Deposit Unlock Scheme?

Deposit Unlock is a private-sector mortgage facilitation scheme specifically designed for buyers of new build homes. It was developed by the Home Builders Federation (HBF) — the trade body representing UK housebuilders — in collaboration with major mortgage lenders and insurance providers. The scheme launched in 2021, initially as a pilot, and has since expanded to become a key part of the new build buyer landscape.

The fundamental purpose of Deposit Unlock is to enable buyers to obtain 95% loan-to-value (LTV) mortgages on new build properties — meaning you only need a 5% deposit. While 95% LTV mortgages are available on the open market for resale properties, lenders have historically been reluctant to offer them on new builds due to concerns about the so-called "new build premium" (the tendency for new build prices to drop slightly once the property is no longer brand new) and the perceived higher risk of negative equity.

Deposit Unlock overcomes this reluctance by having the developer provide an insurance policy to the lender. This insurance protects the lender against a portion of the risk associated with the higher LTV, making them willing to offer 95% mortgages on new builds that they would otherwise avoid or price punitively.

Crucially, Deposit Unlock is not a government scheme. There is no taxpayer money involved, no equity loan to repay, and no government stake in your property. It is a purely commercial arrangement between developers, lenders, and an insurance underwriter. From the buyer's perspective, it simply makes 95% LTV mortgages available on new builds where they otherwise might not be.

How Deposit Unlock Differs from Help to Buy

While Deposit Unlock and Help to Buy both aimed to help buyers purchase new builds with smaller deposits, they work in fundamentally different ways:

The most significant practical difference is that with Help to Buy, you effectively had a 75% mortgage plus a 20% government loan, giving you access to the best mortgage rates available. With Deposit Unlock, you have a 95% mortgage — which, while competitive, will carry a higher interest rate than a 75% LTV product. However, there is no equity loan to worry about, no interest charges building up after year five, and no government stake complicating future sales or remortgages. Many buyers find this simplicity and clarity to be a major advantage.

How Does Deposit Unlock Work? The Full Mechanics

Understanding the mechanics of Deposit Unlock helps explain why it is able to make 95% LTV new build mortgages available and what this means for you as a buyer. Here is a detailed breakdown:

The Insurance Mechanism

At the heart of Deposit Unlock is an insurance policy provided by the developer. When a lender offers a 95% LTV mortgage, they are exposed to greater risk — if the property value falls, the borrower could end up in negative equity, and in the worst case (repossession), the lender might not recover the full loan amount from the property sale.

For new build properties, this risk is perceived to be slightly higher due to the "new build premium" — the idea that a new build property may experience a modest price adjustment once it is no longer brand new. This perception (whether accurate or not) has made many lenders cautious about offering high-LTV mortgages on new builds.

Deposit Unlock addresses this by having the developer purchase an indemnity insurance policy from a specialist insurer. This policy protects the lender against losses in the event of a borrower default and subsequent property sale at a loss. The insurance covers the difference between what the lender recovers from the property sale and the outstanding loan balance, up to a specified limit.

The insurance is arranged through Gallagher Re (formerly Willis Towers Watson), one of the world's largest insurance brokers, who structured the scheme in collaboration with the HBF. The insurance is underwritten by a panel of major reinsurers, providing the lender with robust financial backing.

Who Pays for the Insurance?

This is a critical point: the developer pays for the insurance, not the buyer. The cost of the insurance premium is borne entirely by the housebuilder as a cost of sale — similar to other marketing and sales expenses. The buyer does not pay any insurance premium, does not need to take out any additional insurance, and is not liable for any insurance-related costs.

The cost to the developer varies depending on the property price, location, and other risk factors, but it is typically a relatively modest percentage of the property price — significantly less than the cost of, say, a 20% Help to Buy equity loan contribution. This makes it a cost-effective sales tool for developers seeking to attract buyers with smaller deposits.

Step-by-Step: How a Deposit Unlock Transaction Works

1. Developer enrols in the scheme: The housebuilder registers specific developments with the Deposit Unlock insurance programme through the HBF and Gallagher Re. Not all developments are automatically included — the developer must actively enrol each one.
2. Buyer reserves a property: You find a new build home on a participating development, confirm that Deposit Unlock is available, and pay a reservation fee to secure your plot.
3. Mortgage application: You apply for a Deposit Unlock mortgage product through a participating lender. The application process is essentially the same as any other mortgage application — income verification, credit checks, affordability assessment, and so on.
4. Lender conducts valuation: The lender instructs a valuation of the property, which must support the purchase price. The valuation is critical because the lender is relying on the property value to underpin the 95% loan.
5. Insurance policy activated: If the mortgage is approved and proceeds to completion, the developer's insurance policy is activated for that specific transaction. The policy protects the lender for the duration of the mortgage (or until the LTV reduces to a level where the additional risk is no longer significant, typically 80% or below).
6. Completion: You complete the purchase, move in, and begin making mortgage payments at the agreed rate. From your perspective, it is a completely standard mortgage — you just happened to need only a 5% deposit.

What Happens If You Default?

If you were to default on your mortgage payments and the lender ultimately repossessed and sold the property at a loss, the insurance policy would compensate the lender for any shortfall (up to the insured amount). This is entirely between the lender and the insurer — you would not have any additional liability beyond the standard obligations under your mortgage agreement. In other words, Deposit Unlock does not change your legal position as a borrower in any way. If you keep up your mortgage payments (as you should), you will never interact with the insurance at all.

Which Developers Participate in Deposit Unlock?

Deposit Unlock has gained widespread adoption among UK housebuilders, with many of the country's largest and most active developers participating. As of 2025, the following major developers are known to offer Deposit Unlock on selected developments:

Major National Housebuilders

• Barratt Developments (including Barratt Homes and David Wilson Homes) — One of the earliest and most active participants, offering Deposit Unlock across a wide range of developments nationwide.
• Taylor Wimpey — Extensive participation across England, Scotland, and Wales, with Deposit Unlock available on many of their developments.
• Persimmon Homes (including Charles Church) — Strong participation, particularly on developments aimed at first-time buyers.
• Bellway Homes — Active participant with Deposit Unlock available on developments across the UK.
• Vistry Group (including Bovis Homes and Linden Homes) — Participation across various developments and brands.
• Redrow — Offers Deposit Unlock on selected developments, particularly in areas with strong first-time buyer demand.
• Crest Nicholson — Participation on developments primarily in southern England.

Regional and Specialist Builders

• Miller Homes — Active participant across their developments in England and Scotland.
• Avant Homes — Offers Deposit Unlock on selected developments in the Midlands and North of England.
• Keepmoat Homes — Participation on urban regeneration and partnership developments.
• Gleeson Homes — Offers Deposit Unlock on their affordable homes targeted at first-time buyers in the North of England and the Midlands.
• Countryside Partnerships — Available on selected developments, particularly mixed-tenure schemes.
• Lovell Homes — Participation on various developments across England and Wales.
• Strata Homes — Offers the scheme on developments in Yorkshire and the North East.

Checking Availability

Not every development from a participating developer will offer Deposit Unlock. The scheme is enrolled on a development-by-development basis, and factors such as the location, property type, and price point may determine whether a specific development is included. Always confirm directly with the sales office whether Deposit Unlock is available on the particular development and plot you are interested in.

The HBF maintains information about the scheme through their official channels, and many developer websites now prominently advertise Deposit Unlock availability on relevant development pages. Your mortgage broker should also be able to confirm which developments and lenders are currently active in the scheme.

Which Lenders Offer Deposit Unlock Mortgages?

The lender landscape for Deposit Unlock has grown steadily since the scheme's launch. The following major lenders have been active participants:

Key Participating Lenders

• Nationwide Building Society — One of the first lenders to join Deposit Unlock, Nationwide has been a cornerstone of the scheme. As the UK's largest building society and a major new build lender, their participation provides significant credibility and accessibility. Nationwide's Deposit Unlock products have typically been competitively priced within the 95% LTV market.
• Halifax (Lloyds Banking Group) — The UK's largest mortgage lender by volume, Halifax's involvement in Deposit Unlock significantly expands the pool of available products and the scheme's reach. Their underwriting infrastructure and broker network make Deposit Unlock accessible through a wide range of channels.
• Newcastle Building Society — An active participant offering Deposit Unlock products, often with competitive rates and flexible terms.
• Accord Mortgages (Yorkshire Building Society Group) — Offers Deposit Unlock products through the broker market, providing additional choice for buyers working with mortgage advisers.
• Leeds Building Society — Participates in the scheme with products available through brokers and directly.

Expanding Lender Panel

The panel of participating lenders continues to grow as the scheme becomes more established and lenders gain confidence in the insurance-backed model. Additional lenders may join over time, increasing competition and potentially improving the rates available to buyers. It is always worth checking the current lender panel at the time of your purchase, as the landscape may have evolved since this guide was written.

One important consideration: because Deposit Unlock products are specific to the scheme, the range of available products is narrower than the full 95% LTV market. However, the participating lenders include some of the UK's largest and most competitive mortgage providers, so you should have access to reasonable options within the scheme.

Eligibility Criteria for Deposit Unlock

Eligibility for Deposit Unlock is determined by a combination of scheme-level requirements and individual lender criteria. Here is a comprehensive overview:

Property Eligibility

• New build only: The property must be a newly built home from a developer that has enrolled the specific development in the Deposit Unlock scheme. Resale properties are not eligible, even if they are on a recent new build estate.
• Participating development: The specific development (not just the developer) must be registered with the Deposit Unlock insurance programme. Check with the sales office to confirm eligibility.
• Houses and apartments: Both houses and apartments (flats) are generally eligible, although some lenders may have specific criteria for apartment lending (such as maximum percentage of apartments in a building, or restrictions on certain types of construction).
• Price limits: Some lenders impose maximum property price limits for Deposit Unlock mortgages. These limits vary by lender but are generally higher than the price caps that applied under Help to Buy. As an example, some lenders cap Deposit Unlock at £750,000 or £1,000,000, while others have no explicit cap. Check with your lender for specific limits.
• England, Scotland, and Wales: Deposit Unlock is available across Great Britain. Availability in Northern Ireland may be limited due to different property law and lending frameworks.

Buyer Eligibility

• First-time buyers and home movers: Deposit Unlock is available to both first-time buyers and existing homeowners looking to move. This is a significant advantage over the final phase of Help to Buy, which was restricted to first-time buyers only.
• Owner-occupiers only: You must intend to live in the property as your main residence. Buy-to-let purchasers and investors cannot use Deposit Unlock.
• No income caps: Unlike Help to Buy or the First Homes scheme, Deposit Unlock does not impose any maximum income limits. Whether you earn £20,000 or £200,000, you can use the scheme (subject to lender affordability).
• Standard mortgage affordability: You must pass the participating lender's standard affordability assessment. This includes income verification, credit history checks, assessment of existing debts and commitments, and stress testing at a higher interest rate.
• Minimum deposit of 5%: You must provide a deposit of at least 5% of the purchase price from your own funds (or acceptable gifted sources). The 5% must be genuine savings, gifts from family, or proceeds from the sale of an existing property. Borrowed deposits are not permitted.
• Acceptable deposit sources: As with any mortgage, the lender will want to verify the source of your deposit. Acceptable sources typically include personal savings, a gifted deposit from a family member (with a signed gift letter confirming it is not repayable), a Lifetime ISA, or equity from the sale of an existing property.
• UK resident: Most Deposit Unlock products require you to be a UK resident with the right to work in the UK. Some lenders may consider applications from British citizens living overseas on a case-by-case basis.
• Age requirements: Standard lender age criteria apply. The mortgage term typically needs to end before you reach the lender's maximum age at maturity (commonly 70-75, though some lenders are more flexible).
• Credit history: You will need to have an acceptable credit history for the lender's criteria. Each lender has its own credit scoring model, and the specific requirements vary. Generally, you will need a clean credit record with no recent defaults, CCJs, or bankruptcies, although minor historical issues may not be disqualifying depending on the lender.

What Does NOT Affect Eligibility

• Previous use of Help to Buy: If you previously used Help to Buy on another property, you can still use Deposit Unlock on a new purchase (assuming you meet the other criteria, including being an owner-occupier).
• Joint or sole applications: Both sole applicants and joint applicants (including couples and friends buying together) can use Deposit Unlock.
• Employment type: Employed, self-employed, and contract workers can all apply, subject to meeting the lender's specific income verification requirements for their employment type.

The Application Process: Step by Step

Applying for a Deposit Unlock mortgage is a straightforward process that mirrors a standard mortgage application, with a few additional considerations specific to the scheme. Here is what to expect at each stage:

Step 1: Confirm Your Budget and Get a Mortgage Agreement in Principle

Before you start viewing properties, speak to a mortgage broker (ideally one experienced with new builds and the Deposit Unlock scheme) to establish your budget. They will assess your income, expenditure, and deposit to provide a mortgage agreement in principle (AIP) — also known as a decision in principle (DIP). This gives you a clear idea of how much you can borrow and at what rate, and it demonstrates to developers that you are a serious buyer.

When getting your AIP, ask your broker specifically about Deposit Unlock products and how they compare to standard 95% LTV options. This early comparison will help you make an informed decision later.

Step 2: Find a Suitable New Build Property on a Participating Development

Search for new build developments that offer Deposit Unlock. You can find these by:

• Checking developer websites, which often flag Deposit Unlock availability
• Asking directly at sales offices when you visit developments
• Consulting your mortgage broker, who should have up-to-date information on participating developments
• Checking the HBF or Deposit Unlock scheme website for participating developer lists

Once you find a property you like on a participating development, confirm with the sales team that Deposit Unlock is available on the specific plot you are interested in.

Step 3: Reserve the Property

When you have found the right property, you will pay a reservation fee — typically between £500 and £1,000 — to take the plot off the market. The reservation agreement will specify the purchase price, any incentives, and the expected completion timeline. Make sure the agreement confirms that you will be purchasing through the Deposit Unlock scheme.

Step 4: Submit Your Full Mortgage Application

With your reservation confirmed, you (or your broker) will submit a full mortgage application to a participating Deposit Unlock lender. You will need to provide:

• Proof of identity: Passport, driving licence, or other government-issued ID
• Proof of address: Utility bills, council tax bill, or bank statements showing your current address
• Income documentation: Three months' payslips and your latest P60 (for employed applicants), or two to three years' SA302 tax calculations and tax year overviews (for self-employed applicants)
• Bank statements: Typically three months' statements for all current accounts, showing your regular income and expenditure patterns
• Deposit evidence: Documentation showing where your deposit funds have come from (savings account statements, gift letters, LISA statements, etc.)
• Details of existing commitments: Information about any existing loans, credit cards, child maintenance, or other regular financial obligations

Step 5: Property Valuation

The lender will instruct a RICS-qualified surveyor to conduct a mortgage valuation of the property. For new builds, this is particularly important because the surveyor must confirm that the property's value supports the purchase price. If the surveyor values the property below the asking price (a "down-valuation"), this can create complications — you may need to renegotiate the price with the developer, increase your deposit, or in some cases walk away from the transaction.

The cost of the valuation varies by lender — some include it free of charge with the mortgage product, while others charge a fee (typically £250-£500 depending on the property value).

Step 6: Mortgage Offer

If the valuation is satisfactory and your application meets the lender's criteria, they will issue a formal mortgage offer. This document sets out the loan amount, interest rate, monthly payments, mortgage term, and all other terms and conditions of the loan. Your solicitor will review this as part of the conveyancing process.

The time from application to mortgage offer typically takes 2 to 6 weeks, although this can vary depending on the lender's processing times and whether any additional information is needed.

Step 7: Conveyancing and Legal Work

Your solicitor will conduct the standard conveyancing process, including:

• Reviewing the contract and title documents
• Conducting local authority searches, environmental searches, and drainage searches
• Reviewing the developer's building warranty (typically NHBC, Premier Guarantee, or LABC)
• Checking planning permissions and building regulations compliance
• Reviewing management company arrangements (for apartments or managed estates)
• Raising enquiries with the developer's solicitor on any issues identified

New build conveyancing can take slightly longer than resale due to the additional documentation involved, but your solicitor and the developer's legal team should be experienced in managing this process efficiently.

Step 8: Exchange of Contracts

Once all legal work is complete, your mortgage offer is in place, and you are satisfied with everything, you will exchange contracts. At this point, the purchase becomes legally binding — both you and the developer are committed to the transaction. You will typically pay a deposit of between 5% and 10% of the purchase price at exchange (distinct from your mortgage deposit, this is a contractual commitment to the developer).

Step 9: Completion

On the completion date, your mortgage lender releases the loan funds to your solicitor, who transfers the full purchase price to the developer. You receive the keys and the property is legally yours. The developer activates the Deposit Unlock insurance with the lender, and your mortgage payments begin — typically one month after completion.

Application Timeline Summary

For off-plan purchases (where the property has not yet been built), you will exchange contracts earlier in the process and wait for the build to complete, which can add several months to the timeline.

How Deposit Unlock Rates Compare to Standard 95% LTV Mortgages

One of the most important questions for buyers considering Deposit Unlock is: how do the interest rates compare to standard 95% LTV mortgages available on the open market?

The Rate Landscape

Standard 95% LTV mortgages for resale properties are widely available from a large number of lenders. These products benefit from intense competition in the mortgage market, which tends to keep rates competitive. The Deposit Unlock market, while growing, has fewer participating lenders, which can mean slightly less competitive pricing.

However, the comparison is not entirely straightforward because many lenders will not offer 95% LTV mortgages on new builds at all outside the Deposit Unlock scheme. If you are buying a new build with a 5% deposit, your standard 95% LTV options may be very limited, and the products available (if any) may carry premium rates to reflect the perceived additional risk. In this context, Deposit Unlock may not just be competitive — it may be the only viable option.

As a general guide, Deposit Unlock rates have typically been comparable to or slightly above the best standard 95% LTV rates for resale properties. The premium, if any, is usually modest — perhaps 0.1% to 0.5% higher. Given that the alternative for a new build buyer with a 5% deposit might be no mortgage at all, this slight premium is generally well worth paying.

Interest Rate Comparison Table (Illustrative)

Note: These rates are illustrative and based on typical market conditions. Actual rates change frequently and depend on individual circumstances, lender, and product features.

The table illustrates an important point: while Deposit Unlock rates are slightly higher than standard 95% LTV products, the biggest rate impact comes from the LTV ratio itself. Moving from 95% LTV to 90% LTV (by saving a 10% deposit instead of 5%) typically saves you 0.5% or more on the interest rate. Moving to 75% LTV saves even more. This is worth bearing in mind when deciding whether to buy now with 5% or wait until you have saved more.

Mortgage Payment Worked Examples

To help you understand the real-world financial implications of buying with Deposit Unlock, here are detailed worked examples at several price points. All examples assume a repayment mortgage over a 25-year term.

Example 1: £225,000 Property — First-Time Buyer, Starter Home

After five years of payments, the buyer's LTV has reduced from 95% to approximately 86%, which opens up access to more competitive mortgage rates on remortgage. If property values have increased even modestly over that period, the LTV could be even lower, further improving the buyer's position.

Example 2: £325,000 Property — First-Time Buyer, 3-Bed Semi

Example 3: £450,000 Property — Home Mover, 4-Bed Detached

At this price point, the monthly payments are substantial, and the borrower is taking on a very large mortgage with minimal equity. This example underscores the importance of being confident in your long-term affordability before committing to a 95% LTV purchase at higher price points.

The Cost of a 5% vs. 10% Deposit: Is the Extra Saving Worth the Wait?

One critical calculation every potential Deposit Unlock buyer should make is whether to buy now with 5% or wait until they have saved 10%. Here is a comparison on a £300,000 property:

The numbers are stark: buying with a 5% deposit costs you approximately £184 more per month and approximately £40,200 more in total interest over the lifetime of the mortgage (assuming static rates, which is unlikely in practice). However, this needs to be weighed against the benefit of getting onto the property ladder sooner, the potential for property prices to rise while you are saving, and the rent you would be paying in the meantime.

If it would take you, say, two years to save an additional £15,000 for a 10% deposit, and you are currently paying £1,200/month in rent, that is £28,800 in rent that provides no return. The calculation is therefore not as simple as "bigger deposit = better" — it depends on your individual circumstances, rental costs, savings rate, and expectations for property price movement.

For more detailed guidance on deposit requirements, see our dedicated guide: New Build Deposit Requirements: How Much Do You Really Need?

Risks of Buying with a 95% LTV Mortgage

While Deposit Unlock makes it possible to buy with just a 5% deposit, it is important to understand the risks associated with high-LTV mortgages. Being aware of these risks helps you make an informed decision and plan for contingencies.

Negative Equity Risk

When you buy with a 5% deposit, you have very little equity in the property. If property values fall even slightly — say, 5-10% — you could find yourself in negative equity, meaning your mortgage is worth more than the property. Negative equity does not affect your day-to-day life if you continue making payments and stay in the property, but it becomes a serious problem if you need to sell (you would need to find cash to cover the shortfall) or remortgage (lenders are unlikely to offer competitive terms on a negative-equity property).

This risk is slightly elevated for new builds due to the "new build premium" — the perception that a new build may be worth slightly less once it is no longer brand new. While this premium is often overstated and can be offset by general market appreciation, it is a factor that buyers with 5% equity should be aware of.

Higher Monthly Payments

A 95% LTV mortgage carries a higher interest rate than lower-LTV products, which means your monthly payments will be higher. On a tight budget, this leaves less room for unexpected expenses and can create financial stress. Make sure you have a comfortable buffer in your monthly budget after mortgage payments, council tax, insurance, utility bills, and other essential costs.

Limited Remortgage Options

When your initial fixed-rate period ends, your remortgage options will depend on your LTV at that time. If property values have been flat or fallen, you may still be at a high LTV, which limits you to more expensive mortgage products. Even if values have risen, you may still be in the 85-90% LTV range, which does not give you access to the best rates.

Vulnerability to Rate Rises

If you fix for two years and rates have risen by the time you remortgage, your monthly payments could increase significantly. With a large 95% LTV mortgage, even a small rate increase translates into a meaningful monthly payment increase. Stress-test your budget by calculating what your payments would be at a rate 2% higher than your current deal — if you could not afford that, think carefully before proceeding.

Mitigating the Risks

• Choose a longer fixed period: A five-year fix gives you more time for your equity to build through mortgage repayments and (hopefully) property value growth before you need to remortgage.
• Make overpayments: If you can afford to overpay your mortgage (usually up to 10% per year without penalty), this builds equity faster and reduces your LTV more quickly.
• Build an emergency fund: Aim to have three to six months' worth of essential expenses in savings as a buffer against unexpected events.
• Do not overstretch: Just because a lender is willing to lend you a certain amount does not mean you should borrow that much. Be conservative with your budget and leave room for contingencies.
• Consider future-proofing: Buy a property that meets your needs for at least five to seven years. Avoiding the need to sell in the short term gives your equity time to build.

Who Is Deposit Unlock Best For?

Deposit Unlock is an excellent scheme for certain types of buyers, but it is not the right choice for everyone. Here is a guide to who will benefit most and who should consider alternatives:

Ideal Candidates for Deposit Unlock

• First-time buyers who specifically want a new build: If you have set your heart on a brand new home but only have a 5% deposit, Deposit Unlock is likely your best route. The alternative — waiting to save a bigger deposit — means risking property price increases and paying rent in the meantime.
• Buyers in areas with strong price growth: If you are buying in an area where property prices are expected to grow, getting on the ladder sooner (even with 5%) can be more beneficial than waiting, as the property appreciation works in your favour.
• Stable, reliable earners: If you have a secure job with a predictable income, the risks of a 95% LTV mortgage are more manageable. You can plan your budget with confidence and make overpayments when possible.
• Buyers who can afford the payments comfortably: If the monthly payments at 95% LTV still leave you with a comfortable margin in your budget, the scheme works well. Do not use Deposit Unlock if the payments will push you to your financial limits.

Who Should Consider Saving a Bigger Deposit Instead

• Buyers who are close to 10%: If you already have 7-8% saved and could reach 10% within six months, it is probably worth waiting. The interest rate saving from 90% LTV versus 95% LTV will benefit you for the long term.
• Buyers in areas with flat or falling prices: If your target area has weak price growth or prices are declining, buying at 95% LTV increases your negative equity risk. A larger deposit provides a bigger buffer.
• Self-employed with variable income: If your income is unpredictable, the higher payments of a 95% LTV mortgage can be risky. A larger deposit and lower monthly payments provide more flexibility during lean months.
• Those who can save quickly: If you are a high earner living at home with minimal expenses and can save a 10% or 15% deposit within a year, the wait is likely worthwhile for the long-term savings.

For a comprehensive overview of buying your first new build home, read our complete guide: First-Time Buyer New Build Guide.

Combining Deposit Unlock with Other Incentives

A natural question is whether Deposit Unlock can be combined with other buyer incentive schemes to maximise your benefits. Here is what you need to know:

Deposit Unlock + Developer Incentives

Yes, in many cases, Deposit Unlock can be combined with developer incentives such as contributions towards stamp duty, legal fees, or upgraded specifications. However, there are limits — lenders typically cap the total value of incentives (including any contributions from the developer) at 5% of the property price for 95% LTV mortgages. If the combined incentives exceed this cap, the lender may reduce the valuation or decline the application.

Deposit Unlock + Lifetime ISA

Absolutely — you can use funds from a Lifetime ISA (LISA) towards your 5% deposit. The LISA bonus (25% on savings up to £4,000 per year) can significantly boost your deposit pot. For example, if you have saved £4,000 in your LISA each year for three years, you would have £12,000 plus £3,000 in government bonuses = £15,000, which is enough for a 5% deposit on a £300,000 property.

Deposit Unlock + Own New Rate

In some cases, it may be possible to combine Deposit Unlock with an Own New Rate subsidised mortgage rate. This would require the same lender to offer both a 95% LTV product and a developer-subsidised rate, which is dependent on the specific lender-developer agreements in place. Ask your developer and broker whether this combination is available — if so, it could be a particularly powerful package.

Deposit Unlock + Shared Ownership

These two schemes are not compatible. Shared Ownership involves purchasing a share of the property (not the full property), and the mortgage products used are different. Deposit Unlock is designed for outright purchases only.

Deposit Unlock + First Homes

Theoretically, these could be combined (using Deposit Unlock financing to purchase a First Homes discounted property), but in practice, this combination is uncommon and availability would depend on the specific lender and developer arrangements.

For a comprehensive guide to all available government and private-sector buyer schemes, see: Government Schemes for First-Time Buyers: The Complete Guide.

Deposit Unlock vs. the Government's Mortgage Guarantee Scheme

In addition to Deposit Unlock, the UK government introduced its own Mortgage Guarantee Scheme in April 2021, which also aims to enable 95% LTV mortgages. It is worth understanding how these two schemes compare:

In practice, for new build buyers with a 5% deposit, Deposit Unlock and the Government Mortgage Guarantee Scheme can sometimes both be available. The key difference is the source of the guarantee — but from the buyer's perspective, the decision comes down to which lender and product offers the best rate and terms for their specific purchase. Your mortgage broker can compare products from both schemes and recommend the most competitive option.

Frequently Asked Questions About Deposit Unlock

Is Deposit Unlock the same as Help to Buy?

No. Help to Buy was a government equity loan where the government lent you up to 20% of the purchase price. Deposit Unlock is a developer-funded insurance arrangement that enables 95% LTV mortgages. There is no equity loan to repay with Deposit Unlock, and the government has no involvement.

Can I use Deposit Unlock for a buy-to-let purchase?

No. Deposit Unlock is only available for owner-occupiers who intend to live in the property as their main residence. Buy-to-let purchases are not eligible.

What happens if I sell the property — do I need to notify anyone about the insurance?

No. The insurance arrangement is between the developer, the insurer, and the lender. When you sell the property and repay your mortgage, the insurance arrangement is no longer relevant. You do not need to take any action regarding the insurance, and it does not affect the sale process.

Is my deposit at risk if the developer goes into administration?

Your mortgage deposit (the 5% you put down) goes to the developer at completion and becomes part of the property price — it is not held separately. Once you have completed and own the property, the developer's financial situation does not affect your ownership. The insurance policy that underpins Deposit Unlock is held by a separate insurer, so a developer going into administration would not affect the lender's insurance coverage.

Can I use Deposit Unlock on a shared ownership property?

No. Deposit Unlock is designed for outright purchases of new build homes. Shared ownership has its own financing structures and mortgage products.

What if the property is down-valued by the surveyor?

If the surveyor values the property below the purchase price, you have several options: negotiate a price reduction with the developer, increase your deposit to cover the gap, challenge the valuation through the lender, or walk away from the purchase. A down-valuation can be particularly challenging with a 5% deposit because you have limited additional funds to cover any shortfall. Discuss this risk with your broker before proceeding.

Is Deposit Unlock available in Scotland?

Yes, Deposit Unlock is available in Scotland, although the range of participating lenders and developers may be more limited than in England. Scottish property transactions follow a different legal process (including the use of missives rather than exchange of contracts), but the Deposit Unlock scheme itself functions in the same way.

Conclusion: Is Deposit Unlock Right for You?

Deposit Unlock has emerged as one of the most important schemes for new build buyers in the post-Help to Buy landscape. It fills a genuine gap in the market, enabling buyers with just a 5% deposit to purchase new build homes when many lenders would otherwise refuse to lend at 95% LTV on new builds. The fact that the developer bears the cost of the insurance — and that there is no equity loan or government stake to worry about — makes it a cleaner, simpler scheme than Help to Buy in many respects.

However, buying with a 5% deposit is not without risk. The higher interest rates at 95% LTV, the vulnerability to negative equity if property values dip, and the higher monthly payments compared to lower-LTV mortgages are all factors that need careful consideration. Deposit Unlock makes the purchase possible, but you still need to ensure it is sensible for your individual financial situation.

The ideal Deposit Unlock buyer is someone who has a stable income, can comfortably afford the monthly payments with a margin for contingencies, specifically wants a new build home, and does not want to (or cannot afford to) wait the additional months or years needed to save a larger deposit. If that sounds like you, Deposit Unlock could be the key to getting you into your new home.

As always, speak to an independent mortgage broker who can assess your full financial picture, compare Deposit Unlock products with all available alternatives, and provide personalised advice. Do not rely solely on the developer's financial adviser — while they can be helpful, their advice may be limited to the products available through the developer's partnerships.

For further reading on related topics, explore our comprehensive guides:

• New Build Deposit Requirements: How Much Do You Really Need?
• First-Time Buyer New Build Guide
• Government Schemes for First-Time Buyers: The Complete Guide