Stacking the Savings: How to Combine Government Schemes with Developer Incentives on a New Build

Why Combining Deals Matters

On a typical new build purchase, the gap between the asking price and what you actually need to pay can be significant if you play your cards right. A government scheme might save you £30,000–£90,000 in upfront costs, while developer incentives might add another £5,000–£15,000 in value. Combined, that could be the difference between affording a two-bed flat and a three-bed house — or the difference between buying this year and waiting another three.

But not all combinations work. Some schemes explicitly prohibit certain incentives. Some lenders reject purchases where the total 'giveaways' exceed a certain percentage of the property value. And some developers quietly reduce incentives on scheme-assisted sales because they're already giving up margin to participate in the scheme. Understanding these rules upfront saves you from discovering problems at the mortgage application stage.

The Government Schemes Available in 2026

Before looking at combinations, here's a quick summary of the current schemes. For detailed comparisons, see our side-by-side scheme comparison guide.

Shared Ownership: Buy 25–75% of the home, rent the rest from a housing association. Available through registered providers.
First Homes: Buy a new build at 30–50% below market value, with the discount locked in perpetuity. England only, first-time buyers.
Own New Rate: The developer subsidises your mortgage rate for the first 2–5 years. You buy at full price with full ownership.
Lifetime ISA (LISA): Save up to £4,000/year and get a 25% government bonus (£1,000/year) toward a first home under £450,000.
Deposit Unlock: Developers underwrite part of the mortgage risk, allowing lenders to offer 95% LTV mortgages on new builds that might otherwise require larger deposits.

Note: Help to Buy closed in 2023 and is no longer available for new purchases. If you have an existing Help to Buy equity loan, see our Help to Buy explained guide.

Common Developer Incentives

Developers offer incentives to attract buyers, move unsold stock, or hit sales targets. The most common include:

Stamp duty paid: The developer covers your stamp duty land tax (or offers a contribution toward it)
Deposit contribution: A cash amount (often 2–5% of the purchase price) contributed toward your deposit or purchase costs
Free upgrades: Kitchen upgrades, flooring, turf, fencing, integrated appliances — sometimes worth £5,000–£15,000
Legal fees paid: The developer covers your solicitor/conveyancer costs (typically £1,500–£3,000)
Furniture packages: Some developers offer furnished show-home style packages on selected plots
Part-exchange: The developer buys your existing home so you can move without selling on the open market
Price reductions: Straightforward discounts on asking price, often on end-of-phase or last-remaining plots

For a complete breakdown of every type of deal, see our guide to new build incentives.

The Combination Matrix: What Works with What

Shared Ownership + Developer Incentives

Limited combinations. Shared Ownership properties are sold through housing associations, not directly by developers. The housing association sets the sale terms, and the scope for developer incentives is typically narrow.

Free upgrades: Rarely available — Shared Ownership properties are usually sold with a standard specification set by the housing association
Stamp duty paid: First-time buyers on Shared Ownership pay no stamp duty on the initial share if it's under £425,000 (which it almost always is), so this incentive is irrelevant
Deposit contribution: Occasionally offered by housing associations (not the developer) on hard-to-sell properties, but uncommon
Legal fees: Some housing associations offer solicitor panel arrangements with reduced fees, but developer-paid legal fees are rare
LISA: Yes — you can use your Lifetime ISA savings and bonus toward the deposit on a Shared Ownership purchase, provided the full property value is under £450,000

Bottom line: Shared Ownership purchases generally have the fewest opportunities to stack incentives. The savings come from the scheme itself (lower deposit, lower mortgage), not from extras.

First Homes + Developer Incentives

Some combinations work, but the discount restricts most financial incentives.

Free upgrades: Possible in theory, but First Homes properties are often standard-spec plots within Section 106 affordable housing allocations. Developers rarely offer upgrade packages on these units.
Stamp duty paid: Not needed — First Homes are capped at £250,000 (£420,000 in London) after discount, and first-time buyers pay no stamp duty under £425,000
Deposit contribution: Unlikely — the property is already being sold at 30–50% below market value, so developers have no margin to offer additional cash incentives
Price negotiation: Not possible — the First Homes price is set by the market valuation minus the agreed discount percentage. There's no room for further negotiation.
LISA: Yes — the Lifetime ISA can be used on First Homes purchases, and the £450,000 cap applies to the discounted price (which is always well under the cap)

Bottom line: First Homes gives you the biggest single saving (30–50% discount), but there's almost nothing to stack on top. The discount is the deal.

Own New Rate + Developer Incentives

The most flexible scheme for combining deals. Because Own New Rate is essentially a normal purchase at full price (with a subsidised mortgage rate), there's more room for additional incentives.

Free upgrades: Yes — developers frequently offer kitchen/flooring/garden upgrades on Own New Rate plots, just as they would on a standard sale
Stamp duty paid: Possible, though less common since the developer is already subsidising the mortgage rate. Some developers offer both on selected plots.
Deposit contribution: This is where it gets complicated. The developer is already contributing money to buy down your rate. Some lenders view an additional deposit contribution as exceeding their maximum 'gifted' percentage (usually 5% of the purchase price). Check with your broker.
Legal fees paid: Yes — commonly offered alongside Own New Rate
Part-exchange: Yes — Own New Rate can usually be combined with part-exchange since you're buying at full price
LISA: Yes — you can use your LISA toward the deposit on an Own New Rate purchase

Bottom line: Own New Rate offers the most stacking potential. The subsidised rate saves you money monthly, and you can often add upgrades, legal fees, and LISA savings on top.

Deposit Unlock + Developer Incentives

Deposit Unlock is specifically about enabling 95% LTV lending, so it stacks well with non-financial incentives:

Free upgrades: Yes
Stamp duty paid: Yes
Legal fees paid: Yes
Deposit contribution: Be careful — lenders on Deposit Unlock already have thin margins, and a deposit contribution might push the total incentive package above their threshold
LISA: Yes

The Lender Rules You Need to Know

Even if a scheme and incentive are technically compatible, your mortgage lender has the final say. Most lenders have specific rules about incentives on new build purchases:

The Incentive Cap

Most lenders cap the total value of incentives at 5% of the purchase price (some allow up to 10% for certain products). Anything above this, and the lender treats it as a hidden price reduction — meaning they'll reduce their valuation accordingly.

For example, on a £300,000 property with a 5% cap:

Total incentives must not exceed £15,000
If the developer offers £10,000 in upgrades + £5,000 in legal fees = £15,000 — you're at the limit
If they also offer a £3,000 stamp duty contribution, total becomes £18,000 — the lender may reduce the valuation by £3,000, requiring you to fund the difference

What Counts as an Incentive?

Lenders typically count these as incentives against the cap:

Cash deposit contributions
Stamp duty paid
Cashback offers
Legal fees paid

These are usually not counted against the cap:

Fixtures and fittings upgrades (kitchen, bathroom, flooring)
White goods and appliance packages
Garden landscaping, turfing, fencing
Furniture packages (if they stay with the property)

This distinction is important because it means you can often accept generous upgrade packages on top of financial incentives without triggering the lender's cap. A £10,000 kitchen upgrade plus £5,000 stamp duty paid would typically only count as £5,000 against a 5% incentive cap.

Own New Rate and the Incentive Cap

With Own New Rate, the developer's subsidy to buy down your rate is handled directly between the developer and lender — it's typically not counted as a buyer incentive. This means your full incentive allowance remains available for other deals. However, some lenders treat it differently, so your broker needs to confirm this with the specific lender.

Worked Example: Maximising Savings on a £300,000 New Build

Here's how a savvy buyer could realistically stack savings using Own New Rate:

The Stack

Own New Rate subsidy: Mortgage rate reduced from 4.5% to 2% for 3 years — saves ~£369/month = £13,284 over 3 years
Kitchen upgrade package: Worth £8,000 (doesn't count against lender incentive cap)
Flooring throughout: Worth £4,500 (doesn't count against cap)
Stamp duty contribution: £0 (first-time buyer, so no stamp duty anyway on a £300,000 property)
Legal fees paid: £2,000 (counts against the 5% / £15,000 cap)
Lifetime ISA bonus: £1,000 (from 1 year of saving £4,000)

Total Savings

Cash savings: £13,284 (rate subsidy) + £2,000 (legal fees) + £1,000 (LISA bonus) = £16,284
Value-in-kind: £8,000 (kitchen) + £4,500 (flooring) = £12,500
Grand total: £28,784 in combined savings

And only £2,000 of this counts against the lender's incentive cap. That leaves £13,000 of headroom if you wanted to negotiate further financial incentives (though getting them on top of Own New Rate would be unusual).

What Definitely Doesn't Stack

Some combinations are explicitly prohibited or practically impossible:

Two government schemes on one property: You can't use First Homes and Shared Ownership together, or First Homes and Own New Rate on the same purchase
Price discounts on First Homes: The price is fixed by valuation minus the scheme discount — no room for negotiation
Part-exchange on Shared Ownership: Housing associations don't offer part-exchange; you'd need to sell your existing property independently
Deposit contributions that exceed lender limits: Even if the developer offers them, your lender may reject the application or down-value the property
Cashback offers on scheme properties: Most lenders specifically prohibit cashback incentives on government-assisted purchases

How to Negotiate the Best Combined Deal

Know which scheme you're using before visiting the sales office. Different schemes unlock different incentive possibilities. If you're using Own New Rate, you have the most flexibility. If you're using First Homes, incentives are essentially off the table.
Ask about upgrades first. Upgrades don't count against lender incentive caps and are often the highest-value items a developer will offer. Get these agreed before discussing financial incentives. Read our negotiation guide for specific tactics.
Check the incentive cap with your broker. Before asking for financial incentives (stamp duty, legal fees, deposit contributions), know your lender's specific cap. A good new build mortgage broker will know this for every lender on their panel.
Time your purchase. Developers are most generous with incentives at end-of-quarter, end-of-financial-year, or on last-remaining plots. If you can be flexible on timing, you'll get better deals.
Get everything in writing. Every incentive should be listed in the reservation agreement and confirmed in the contract. Verbal promises from sales advisors are worth nothing if they're not documented.
Don't forget the LISA. If you're a first-time buyer and haven't opened a Lifetime ISA, even one year of savings gives you a £1,000 government bonus. It's free money that stacks with everything.

Common Mistakes When Combining Deals

Not telling your solicitor about all incentives: Your conveyancer needs to declare all incentives to the lender. Undisclosed incentives can void your mortgage offer.
Assuming all incentives are "free": Some developers inflate the base price to fund the incentive package. Always compare the total cost (price minus incentive value) against equivalent non-incentive properties. See our guide to reading the fine print on incentives.
Forgetting about the SDLT threshold: If you're a first-time buyer on a property under £425,000, you pay no stamp duty anyway — so a "stamp duty paid" incentive is worth nothing to you. Ask for something else instead.
Not getting a mortgage agreement in principle before negotiating: You need to know your budget and your lender's incentive limits before you can negotiate effectively.
Ignoring the long-term cost: An impressive-looking incentive package on day one doesn't help if the purchase price is £20,000 above market value. Focus on the net cost, not the headline savings.

The Bottom Line

Combining government schemes with developer incentives is possible — but the devil is in the detail. Own New Rate offers the most flexibility for stacking deals, while First Homes and Shared Ownership leave little room for additional incentives because the scheme itself is the saving.

The most important step is talking to a mortgage broker who specialises in new builds before you start negotiating with developers. They'll tell you exactly what your lender will and won't accept, so you can negotiate confidently and avoid nasty surprises at the application stage.

For a full overview of every scheme available in 2026, see our complete guide to government schemes for new build buyers. For detailed incentive negotiation tactics, read our incentive negotiation playbook.