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How to remortgage for home improvements and extensions in the UK

6 min read
Oct '25 • by Amy Bulger

Quick summary

Remortgaging for home improvements in the UK is best when your home has increased in value, allowing you to borrow up to 80-85% of its worth, possibly up to 90%. Typically, you can borrow between £20,000 and £200,000 for renovations, but you should be aware of early repayment charges if you’re still within your fixed term. It’s not suitable if your home’s value hasn’t risen or if you’re at the start of your mortgage deal.

Are you feeling like renovating your home this year? Possibly a new kitchen or a loft conversion? Or even just a new bathroom? Your remortgage can help fund your renovation project - but there are pros and cons to consider! Here is our complete guide on remortgaging for home improvements.

How does remortgaging for home improvement work?

When you remortgage, you can release any equity in your property to put towards home improvements. In simple terms, you take the amount of value left on your current mortgage and add the cost of your home improvement, then you apply for this total amount with your remortgage. It can add a layer of difficulty to the process, but is a very popular way of unlocking funds for major home improvement projects.

What factors will be taken into consideration when borrowing more?

There's plenty to take into account when it comes to remortgaging. Here are some of the best questions to sit down and ask yourself before you begin the process...

The amount of equity you own in your home

Depending on how much money is in your home currently will depend on how much the lender will allow you to borrow. For example, if your home is worth £300,000 and you owe £150,000 on your mortgage, simply subtract your remaining mortgage from the home’s value. You will have £150,000 in home equity. You can then remortgage to release this equity, with our mortgage advisers there to help you explore current rates.

See how much you can borrow

Get an indicative idea of your borrowing potential by answering the simple questions below

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