Why Remortgage a New Build?
There are several reasons to remortgage, and understanding yours determines the best approach:
| Reason | What It Means | Typical Timing |
|---|---|---|
| Initial rate ending | Your fixed or tracker deal is expiring and you'll move to the lender's SVR (typically 7–8.5%) | 2, 3, or 5 years after completion |
| Better rate available | Market rates have dropped since you took your mortgage | Any time (subject to ERCs) |
| Release equity | Your property has increased in value and you want to access cash | Usually 3+ years after purchase |
| Change mortgage terms | Shorten term to pay off faster, or extend to reduce payments | Any time |
| Consolidate debt | Roll expensive debts into your mortgage at a lower rate | Any time (with equity available) |
| Repay Help to Buy loan | You need to refinance to repay the government equity loan | Year 6+ (when interest starts) or when selling/remortgaging |
| Staircase shared ownership | Buy a larger share of your home | After initial moratorium (usually 12 months) |
| Remove a borrower | Separation, divorce, or one person moving out | Any time |
The Cost of Doing Nothing
If you don't remortgage when your initial rate ends, you'll default to your lender's Standard Variable Rate (SVR). The impact is significant:
| Mortgage Balance | Fixed Rate (e.g. 4.2%) | SVR (e.g. 7.75%) | Monthly Increase | Annual Cost of Inaction |
|---|---|---|---|---|
| £200,000 (25yr) | £1,082 | £1,478 | +£396 | £4,752 |
| £250,000 (25yr) | £1,352 | £1,847 | +£495 | £5,940 |
| £300,000 (30yr) | £1,467 | £2,147 | +£680 | £8,160 |
| £350,000 (30yr) | £1,711 | £2,505 | +£794 | £9,528 |
Even one month on SVR costs hundreds of pounds unnecessarily. Start the remortgage process 4–6 months before your current deal ends.
When to Remortgage: Timing It Right
The Ideal Timeline
| Months Before Deal Ends | Action |
|---|---|
| 6 months | Check your current deal end date and any ERCs. Review your property value estimate. Start researching rates |
| 4–5 months | Speak to a broker or check your lender's product transfer options. Most lenders allow you to lock in a new rate 4–6 months early |
| 3–4 months | Submit remortgage application. Valuation arranged |
| 1–2 months | Offer received and accepted. Solicitor completes legal work |
| 0 months | New deal starts the day your old one ends — no gap on SVR |
Can You Remortgage Early?
Yes, but you'll typically face early repayment charges (ERCs). Whether it's worth paying the ERC depends on:
- The size of the ERC (usually 1–5% of the outstanding balance)
- The rate difference between your current deal and available rates
- How long remains on your current deal
A broker can calculate whether breaking early saves money overall. In a falling rate environment, it sometimes makes sense to pay a 1–2% ERC to access a significantly lower rate.
First Remortgage After Buying New Build
Your first remortgage is especially important because:
- You may have accepted a higher initial rate tied to a developer incentive package
- Your property may have gained or lost value since purchase (the new build premium effect)
- Your financial circumstances may have changed (salary increase, new debts, children)
- You now have a track record of mortgage payments, which strengthens your application
Product Transfer vs Full Remortgage
When your deal ends, you have two main options:
| Factor | Product Transfer (Same Lender) | Full Remortgage (New Lender) |
|---|---|---|
| Valuation needed? | Usually no — uses original or indexed value | Yes — new valuation required |
| Legal work? | None | Yes — solicitor/conveyancer needed |
| Credit check? | Soft check or none | Full credit check and affordability assessment |
| Typical cost | £0 (product fee may apply) | £0–£1,500+ (legal fees, valuation, product fee) |
| Speed | Can complete in days | 4–8 weeks typical |
| Rate competitiveness | May not be market-leading | Access to entire market — likely better rates |
| Best when | LTV is tight, circumstances have changed unfavourably, or you want simplicity | You have good equity, clean credit, and want the best rate |
When Product Transfer Wins
A product transfer is often the better choice for new build owners because:
- No valuation risk: If the new build premium has eroded your equity, a product transfer avoids the potentially unfavourable revaluation
- No affordability reassessment: If your circumstances have changed (new baby, reduced income, additional debts), a product transfer may not require a fresh affordability check
- Faster and cheaper: No legal fees, no valuation fee, and typically completes within a week
When Full Remortgage Wins
- Your property has genuinely increased in value and you want to access a better LTV band
- The rate difference is significant enough to outweigh fees (typically 0.3%+ saving)
- You want to release equity (product transfers usually don't allow additional borrowing)
- You want to change your mortgage structure (interest-only, different term)
Early Repayment Charges Explained
ERCs are penalties for leaving your mortgage deal before it ends. They're a key consideration when deciding whether to remortgage early.
Typical ERC Structures
| Product | Year 1 | Year 2 | Year 3 | Year 4 | Year 5 |
|---|---|---|---|---|---|
| 2-year fixed | 3–5% | 2–3% | — | — | — |
| 3-year fixed | 3–5% | 3–4% | 1–2% | — | — |
| 5-year fixed | 5% | 4% | 3% | 2% | 1% |
Calculating Whether Early Exit Makes Sense
| Factor | Example |
|---|---|
| Outstanding balance | £250,000 |
| Current rate | 5.5% (fixed, 18 months remaining) |
| Available new rate | 3.9% (5-year fix) |
| Monthly saving at new rate | ~£230/month |
| ERC (2% of £250,000) | £5,000 |
| Months to recoup ERC | 22 months |
| Net saving over 5-year new deal | £8,800 (after ERC) |
| Verdict | Worth switching — breaks even in under 2 years |
Overpayment Allowances
Most fixed-rate mortgages allow you to overpay 10% of the balance per year without penalty. This can be used strategically:
- Overpay to reduce the balance before remortgaging, improving your LTV
- Make a lump sum overpayment just before the ERC-free period to maximise the benefit
- Some lenders allow you to "borrow back" overpayments — check your terms
The Remortgage Process Step by Step
Step 1: Review Your Current Mortgage
Gather these details:
- Current balance outstanding
- Current interest rate and product type
- Deal end date and any ERCs
- Lender's SVR rate (what you'll pay if you don't act)
- Any overpayment rights or restrictions
- Remaining term
Step 2: Estimate Your Property Value
Use property portals, recent sold prices in your development, and estate agent estimates. For new builds, be cautious — online estimates often use the original purchase price, which may overstate current value.
Step 3: Calculate Your LTV
LTV = (Outstanding Balance ÷ Current Property Value) × 100. Key LTV thresholds that unlock better rates:
| LTV Band | Rate Impact | Availability |
|---|---|---|
| Under 60% | Best rates available | All lenders |
| 60–75% | Good rates, wide choice | All lenders |
| 75–80% | Slightly higher rates | Most lenders |
| 80–85% | Higher rates, fewer options | Many lenders |
| 85–90% | Premium rates, limited choice | Some lenders |
| 90–95% | Highest rates, few lenders | Limited (rare for remortgages) |
Step 4: Compare Options
Check your current lender's product transfer rates against the wider market. A whole-of-market broker can do this efficiently.
Step 5: Apply
For a full remortgage, you'll need:
- Proof of identity and address
- 3 months' bank statements
- 3 months' payslips (or SA302 if self-employed)
- Details of existing mortgage
- Property details
Step 6: Valuation
The new lender arranges a valuation. For new builds, this may be a desktop valuation (based on data) or physical inspection. If the valuation comes back lower than expected, you can:
- Challenge it with comparable evidence
- Accept a higher LTV (and potentially higher rate)
- Fall back to a product transfer with your current lender
- Inject additional funds to reduce the loan
Step 7: Legal Completion
A solicitor handles the transfer between lenders. Many remortgage deals include free legal work. The process typically takes 4–8 weeks from application to completion.
Valuations: What to Expect
Valuation Methods for New Builds
| Method | How It Works | Pros | Cons |
|---|---|---|---|
| Desktop/AVM | Automated model using comparable sales data | Fast, free, no appointment needed | May not reflect improvements or unique features. Often undervalues new builds |
| Drive-by | Surveyor views exterior only | Moderate cost, reasonably quick | Misses internal improvements |
| Full physical | Surveyor inspects internally and externally | Most accurate, reflects improvements | Costs more, requires appointment |
Tips to Maximise Your Valuation
- Provide details of any improvements (new kitchen, bathroom, garden landscaping)
- List recent comparable sales in your development (especially if higher than your expected value)
- Ensure the property is clean and presentable for physical inspections
- If you get an unfavourable desktop valuation, ask the lender to upgrade to a physical inspection
- Time your remortgage after nearby sales complete at strong prices
Remortgaging with Help to Buy
If you purchased using a Help to Buy equity loan, remortgaging is more complex. The government holds a 20% equity stake (40% in London) that you'll eventually need to repay.
How the Equity Loan Works at Remortgage
| Year | Interest Charged on Equity Loan |
|---|---|
| Years 1–5 | No interest (just a £1/month management fee) |
| Year 6 | 1.75% of the loan amount |
| Year 7+ | Previous year's fee + RPI + 1% (compounds annually) |
Interest escalates rapidly. By year 10, the effective rate on the equity loan can exceed 4–5%. This makes repayment increasingly urgent.
Option 1: Remortgage to Repay the Equity Loan
This is the most common approach. You need to borrow enough to cover:
- Your existing mortgage balance
- The current value of the equity loan (20% of current property value, not purchase price)
Example:
| Element | Amount |
|---|---|
| Original purchase price | £300,000 |
| Help to Buy loan (20%) | £60,000 at purchase |
| Original mortgage (75%) | £225,000 |
| Current property value | £310,000 |
| Help to Buy repayment (20% of current value) | £62,000 |
| Current mortgage balance | £210,000 |
| New mortgage needed | £272,000 |
| New LTV | 87.7% |
Key risk: If your property hasn't increased in value (common with new builds after 2–5 years), the new LTV may be too high for many lenders. This is the new build premium trap at its worst — you need a bigger mortgage to repay Help to Buy, but the property hasn't appreciated enough to support it.
Option 2: Make Partial Repayments (Staircasing Out)
You can repay the equity loan in chunks of at least 10% of your property's current value. Each repayment requires a new valuation (£100–£300) and an administration fee. This reduces the equity loan percentage without needing to remortgage the full amount.
Option 3: Keep the Equity Loan and Remortgage the Main Mortgage Only
You can remortgage just your main mortgage while keeping the Help to Buy loan in place. This is simpler but fewer lenders accept Help to Buy second charges. Your options will be more limited and rates may be slightly higher.
Help to Buy Remortgage Process
- Obtain a redemption figure from Target Group (the Help to Buy administrator)
- Get your property valued by an RICS-qualified surveyor
- Apply for a remortgage large enough to cover both the existing mortgage and the equity loan
- Your solicitor handles the repayment of the equity loan and transfer of the main mortgage
- Allow 8–12 weeks for the full process
What If You're in Negative Equity?
Negative equity means your property is worth less than your outstanding mortgage. This is a real risk for new build owners, particularly those who:
- Purchased at 90–95% LTV
- Bought in a development with a significant new build premium
- Bought during a market peak
Your Options in Negative Equity
| Option | How It Works | Availability |
|---|---|---|
| Product transfer with current lender | Stay with your lender, switch to a new rate — no valuation needed | Most lenders offer this |
| Negative equity remortgage | Very few lenders will remortgage in negative equity | Extremely limited |
| Overpay to reach positive equity | Make overpayments to reduce balance below property value | Subject to overpayment limits |
| Wait for market recovery | Stay on current lender's products until equity improves | Always available, but may mean higher rates |
| Inject additional funds | Put cash in to reduce the mortgage balance at remortgage | If you have savings available |
Product Transfer: Your Safety Net
This is where product transfers become essential. Even if you're in negative equity, your current lender will almost always offer you a product transfer to one of their current deals. The rate won't be market-leading, but it will be far better than SVR. Most lenders view existing customers in negative equity as lower risk than new applicants because you've already been making payments.
Releasing Equity from Your New Build
If your new build has increased in value, you can release equity when remortgaging. Common uses include:
- Home improvements (kitchen, bathroom, extension)
- Deposit for a buy-to-let investment
- Debt consolidation
- Major life expenses (wedding, education)
How Much Can You Release?
The maximum depends on your property value, current mortgage balance, and the maximum LTV the lender allows for equity release:
| Current Value | Current Mortgage | Max LTV (80%) | Maximum Release |
|---|---|---|---|
| £300,000 | £200,000 | £240,000 | £40,000 |
| £350,000 | £220,000 | £280,000 | £60,000 |
| £400,000 | £250,000 | £320,000 | £70,000 |
Important: Not all lenders allow capital raising on remortgage. Those that do will want to know the purpose. Home improvements and debt consolidation are usually accepted; general spending or investments may be restricted.
New Build Warning
Equity release is only possible if your property has genuinely appreciated in value. If the new build premium has eroded, you may have less equity than you think. Always get a realistic valuation before assuming equity is available.
Porting Your Mortgage When Moving
If you're selling your new build and buying another property, you may be able to "port" your mortgage — transferring your current deal to the new property. This avoids ERCs and lets you keep a good rate.
Porting Requirements
- The new property must meet the lender's criteria
- You must pass a fresh affordability assessment
- The new property must be valued by the lender
- Porting is not guaranteed — it's a new application on the same terms
Porting with Additional Borrowing
If the new property costs more, you can usually take additional borrowing on a different rate alongside the ported amount. This creates a "split mortgage" with two rates.
When Porting Doesn't Work
- The new property is a type the lender doesn't accept (new build flat in a high-rise, non-standard construction)
- Your circumstances have changed and you no longer pass affordability
- You're downsizing significantly — the lender may not port to a much smaller loan
Remortgaging Costs Breakdown
| Cost | Typical Amount | Notes |
|---|---|---|
| Arrangement/product fee | £0–£1,999 | Can often be added to the loan (increases interest costs) |
| Valuation fee | £0–£500 | Often free with remortgage deals |
| Legal fees | £0–£500 | Often free with remortgage deals; if not, budget £300–£500 |
| ERC (if breaking early) | 1–5% of balance | Only applies if leaving current deal before it ends |
| Deeds release fee | £50–£300 | Charged by your current lender to release the title deeds |
| Broker fee | £0–£500 | Some brokers charge; many earn commission from the lender instead |
| Help to Buy admin fee | £115 | Only if repaying Help to Buy equity loan |
| Help to Buy valuation | £100–£300 | RICS valuation required for equity loan repayment |
Fee-Free vs Fee-Paying Deals
A fee-paying deal (e.g., 3.8% with £999 fee) may work out cheaper than a fee-free deal (e.g., 4.1% with no fee) if your mortgage is large enough. Calculate the total cost over the deal period:
| Mortgage Balance | 3.8% + £999 Fee (Total Over 5 Years) | 4.1% No Fee (Total Over 5 Years) | Better Option |
|---|---|---|---|
| £150,000 | £29,699 + £999 = £30,698 | £32,150 | Fee deal saves £1,452 |
| £100,000 | £19,799 + £999 = £20,798 | £21,433 | Fee deal saves £635 |
| £50,000 | £9,899 + £999 = £10,898 | £10,717 | No-fee deal saves £181 |
Rule of thumb: fee-paying deals tend to be better for mortgages above £100,000; below that, fee-free often wins.
How to Find the Best Remortgage Deal
Step 1: Know Your Numbers
Before comparing deals, establish your exact LTV, mortgage balance, remaining term, and deal end date. These determine which products are available to you.
Step 2: Check Your Current Lender First
Most lenders will show you product transfer options in your online account or by phone. Get their best offer as your baseline.
Step 3: Compare the Whole Market
Use a whole-of-market broker or comparison service. A broker can access deals not available direct to consumers and may negotiate on fees.
Step 4: Calculate Total Cost, Not Just Rate
Compare the total cost over the deal period (monthly payments + fees) rather than headline rate alone. A 3.7% deal with a £1,999 fee may cost more than a 3.95% deal with no fee on a smaller mortgage.
Step 5: Consider the Exit Strategy
Think about what you'll do when the new deal ends. If you might move within 3 years, a 2-year fix with low ERCs might be better than a 5-year fix with higher ERCs, even if the rate is slightly higher.
Using a Broker vs Going Direct
| Approach | Pros | Cons |
|---|---|---|
| Whole-of-market broker | Access to full market including exclusive deals; handles paperwork; advises on complex cases | May charge a fee (£0–£500); quality varies |
| Direct to lender | No broker fee; sometimes exclusive direct-only deals | Limited to one lender's products; no comparative advice |
| Comparison websites | Quick overview of available rates | May not show all deals; no personalised advice; don't account for your specific eligibility |
Common Remortgaging Mistakes
| Mistake | Consequence | How to Avoid |
|---|---|---|
| Leaving it too late | End up on SVR for 1–3 months, costing hundreds | Start the process 4–6 months before deal end |
| Only checking your current lender | Miss better deals on the wider market | Always compare with a broker or comparison site |
| Ignoring total cost | Choose a low-rate deal with high fees that costs more overall | Calculate total cost over the full deal period |
| Assuming your property value | Apply for a higher LTV than the valuation supports, causing delays or rejection | Get a realistic estimate before applying |
| Forgetting to budget for fees | Unexpected costs at completion | Factor in all fees (product, legal, valuation, deeds release) |
| Not considering overpayments first | Miss the chance to hit a better LTV band | Overpay before remortgaging to cross an LTV threshold (e.g., 80% to 75%) |
| Adding fees to the loan | Pay interest on fees for the full mortgage term | Pay fees upfront if possible — a £999 fee added to a 25-year mortgage costs ~£1,600+ in total |
| Remortgaging too often | Fees accumulate and total cost increases | 5-year fixes reduce the frequency of remortgaging |
Frequently Asked Questions
How soon after buying a new build can I remortgage?
Technically, you can remortgage at any time, but you'll face ERCs if you're within your initial deal period. Most buyers wait until their initial rate ends (2, 3, or 5 years). If you need to remortgage sooner, calculate whether the ERC is outweighed by savings from a better rate.
Will my new build have lost value when I come to remortgage?
Many new builds experience a period where the new build premium erodes. In a rising market, this is offset by general price growth. In a flat or falling market, you could find your property is worth less than you paid. This is most acute for buyers who purchased at high LTV (90%+) in developments with significant premiums.
Can I remortgage if I still have a Help to Buy equity loan?
Yes, you have three options: remortgage to repay the equity loan entirely, make partial repayments, or remortgage your main mortgage while keeping the equity loan in place (fewer lenders accept this). See the Help to Buy section above for details.
What if my remortgage valuation is lower than expected?
You can challenge the valuation with comparable evidence, accept a higher LTV (potentially at a higher rate), inject additional funds to reduce the loan, or fall back to a product transfer with your current lender (no valuation needed).
Is it worth paying a broker for remortgaging?
For straightforward cases (good equity, PAYE income, no complications), a fee-free broker or direct comparison may suffice. For complex cases (Help to Buy, negative equity, self-employed, shared ownership), a broker's expertise often saves far more than their fee.
What happens to my buildings insurance when I remortgage?
Your new lender will require buildings insurance, but you don't have to use theirs. You can arrange your own policy (often cheaper) as long as it meets the lender's minimum requirements. If you're in a flat, the buildings insurance is usually covered by the building's management company through your service charge.