Mortgage that allows you to Demolish a house
Yes, you can. But it depends on what you’re doing to the property, and whether it remains “mortgageable” while the work is underway.
If you’re planning to knock down and rebuild, you’re usually looking at self-build finance or bridging/development finance. If you’re planning to extend or refurbish, a standard residential mortgage can work in many cases, unless the property becomes uninhabitable during the works.
The first question lenders ask
Is the property going to be habitable and mortgageable throughout the project?
If the answer is yes (for example, a normal extension while you can still live there), mainstream lenders are often comfortable.
If the answer is no (for example, you’re demolishing it, or it will be without a kitchen/bathroom/roof for a period), you’ll normally need a specialist structure.
If you want to demolish and rebuild
This is usually treated as a build project, not a standard purchase.
Most borrowers end up using one of these:
Self-build mortgage
A self-build mortgage typically releases money in stages, either in advance of works or in arrears once each stage is completed.
It’s best suited where you intend to live in the finished home as your main residence, and where you have a clear build plan, costs and timeline.
Bridging or development finance
This is often used where speed matters, where the property will be uninhabitable, or where the plan is to sell or refinance once the build is complete.
A simple way to think about it is that bridging is commonly structured as a lump sum, while development-style facilities are more often staged against progress.
If you (or a close family member) will live in the property, bridging can also fall into the regulated category, which changes the advice and process requirements.
If you’re extending, renovating, or adding space
In many cases, you can use a normal mortgage, particularly if:
- the property is habitable during the works
- the works are funded from savings, and the mortgage is simply to buy/remortgage
- you’re not changing the property so radically that a lender would consider it “non-standard” during the project
If you need the lender to fund the works, it can become more specialist, because lenders want confidence on cost control and end value.
What you’ll need in place
For any build or major works, the “paperwork” usually drives lender confidence as much as your income does.
Expect questions around:
- planning permission (outline vs full, depending on the route)
- build costs, drawings, and a realistic contingency
- who is managing the build (main contractor vs self-managed)
- how the lender’s money will be protected at each stage (survey/inspection at stage releases is common on self-build products)
- your end plan: live in it, sell it, or refinance onto a standard residential or buy-to-let mortgage
The part people often underestimate
Timing and cashflow.
If your funding is released in arrears, you may need to pay for work up front and then be reimbursed at each stage. If it’s released in advance, the lender is taking more risk and will want tighter controls.
Either way, the structure needs to match how your builder expects to be paid.
What to do next
Start with the end goal and work backwards. Are you living in the finished property, selling it, or letting it?
Then choose the finance route that matches the “during works” reality. If the property won’t be habitable, assume you’re in self-build or bridging/development territory.
This is a good one to run through with a broker early, because the fastest way to waste time is applying with a mainstream lender when the property falls outside their definition of mortgageable for part of the project.
It’s worth exploring your options in a bit more detail, and you can do this by contacting one of our consultants on 023 8235 2300 and they’ll be able to give you a more detailed idea of how we can help you.
