Unmortgageable and uninhabitable property

A property is unmortgageable when most mortgage lenders will not accept it as security. The usual reason is that it is uninhabitable, lacking a working kitchen or bathroom, or with serious structural, damp or safety problems. Other causes include very short leases, certain non-standard construction types, severe subsidence or Japanese knotweed close to the building.

Uninhabitable is not a legal category, so each lender and valuer applies its own test. A home with an old but working kitchen is usually mortgageable, while one with no kitchen at all or no safe heating often is not.

Auction lots and probate sales often include homes like these, which is why they can sell below the price of similar homes in good condition.

Most residential lenders will not lend on an uninhabitable property, because the home cannot be lived in and its value as security is uncertain. A few specialist lenders and some building societies offer products that release funds after the purchase as essential works are completed, but these are limited and usually need a larger deposit.

More often, buyers use cash, bridging or refurbishment finance to buy the property and carry out the works, then move onto a mortgage once the home meets the lender's standards. Bridging secured on a home the borrower will live in can be regulated by the FCA, depending on how much of the property is the home (FCA Handbook PERG 4.4, accessed 20 Oct 2026).

The cost of short-term finance is higher than a mortgage, so the works timetable and the refinance need to be planned before buying.

The usual route for an unmortgageable home is to buy with short-term finance, carry out the works that make it habitable, then refinance onto a mortgage based on the improved value. The loan is sized on the purchase price and the works budget, and the lender checks that a mortgage will be available at the end.

Some works, such as a new kitchen and bathroom, are quick to complete. Others, such as structural repairs or treating damp, take longer and can uncover more work. A survey before buying gives the clearest view of what is needed and how much it will cost.

How light and heavy works are treated differently by lenders is set out on the light vs heavy refurbishment page.

Some homes are unmortgageable for reasons that works cannot fix quickly. Short leases on flats, certain concrete and steel-framed construction types, homes above commercial premises with problem uses, and properties with serious subsidence history can all put lenders off. Each has its own route, from a lease extension to a specialist lender.

Homes that have been empty for a long time can qualify for a reduced rate of VAT on renovation work, which lowers the cost of bringing them back into use (HMRC VAT Notice 708, accessed 20 Oct 2026).

Lenders also decline homes with unresolved legal issues, such as missing planning approval or problems with the title, until these are put right.

Comparing finance for an unmortgageable home means looking at the short-term loan and the mortgage that will replace it together. The rate, arrangement and exit fees, how the works money is released and the time the works will take all affect the total cost, as does whether a mortgage lender will accept the finished home.

A broker who arranges refurbishment and bridging cases can compare lenders on the purchase and the refinance at the same time. Firms that arrange this kind of finance are listed on the refurbishment finance brokers page.