Comparison · Mortgages · 2026/27
Further Advance vs Remortgaging for Home Improvements 2026/27
Both let you release extra capital secured against your home for renovations - but a further advance leaves your existing mortgage deal untouched, while remortgaging replaces it entirely. The right choice usually comes down to your Early Repayment Charge exposure and how the rates compare.
TL;DR - 30-Second Summary
- - Further advance: extra borrowing from your existing lender, separate rate, no ERC on your current deal
- - Remortgage: replaces your whole mortgage, one new rate on everything, may trigger an ERC if done early
- - Locked into a good fixed rate with a big ERC? A further advance usually avoids the penalty
- - Deal ending soon or on an uncompetitive rate? A full remortgage may give a better blended rate
Side by Side
| Feature | Further Advance | Remortgage |
|---|---|---|
| Lender | Your existing lender only | Existing lender or a new one |
| Existing mortgage rate | Untouched - keeps its own rate/term | Replaced entirely by the new rate |
| Early Repayment Charge risk | None on the existing deal | Possible if you exit your current deal early |
| Monthly payment structure | Two separate payments (existing + new) | One single payment |
| Best suited to | Mid-deal, good existing rate, large ERC | Deal ending soon, uncompetitive rate |
Worked Example
A homeowner two years into a five-year fix wants £30,000 for a loft conversion. Remortgaging early would trigger an ERC that could easily cost more than the interest saved from a lower blended rate, so a further advance from the existing lender - even at a slightly higher rate on just the £30,000 - is usually the cheaper route. By contrast, a homeowner whose fixed deal ends in two months, on an uncompetitive rate, is better off remortgaging the whole balance including the £30,000, since there is no ERC to avoid and the new blended rate may beat both the old rate and any further advance rate.
Which Should You Choose?
Start by checking your current Early Repayment Charge schedule and how many months remain on your deal. If the ERC is significant and your deal has a long way to run, ask your existing lender for a further advance quote first. If your deal is close to ending, or your ERC is small or nil, get a full remortgage quote covering both your existing balance and the extra funds, and compare the total cost over your intended term against the further advance route before deciding.