If your house is unmortgageable, like when it's plagued by Japanese knotweed, you're in a real pickle. You could try estate agents, but they'll list it with slim hope; or auctions, which attract low offers. Your best bet? Go straight to cash buyers who dodge the whole mortgage mess and snap houses up in a flash.
If you need to sell an unmortgageable house, the problem is usually not a lack of interest in the property. It is that a mortgage lender will not lend against it, which can cause otherwise promising sales to fall through.
That can happen for lots of reasons, from structural issues and Japanese knotweed to a short lease, non-standard construction or missing paperwork. Some problems can be fixed before selling. Others are expensive, slow or simply not practical to resolve.
Property Saviour buys unmortgageable properties directly for cash, so the purchase does not depend on a buyer getting mortgage approval. If you are deciding whether to repair, auction or sell directly, the important thing is to understand why the property is unmortgageable and what each route would involve.
A property can become difficult or impossible to mortgage when it falls outside a lender’s criteria. Different lenders have different rules, so a problem that one mortgage lender refuses may be acceptable to another. However, some issues significantly reduce the number of lenders and buyers available.
Common reasons include:
If the issue is Japanese knotweed, our guide to selling a house with Japanese knotweed looks at that problem in more detail. For homes with serious damage or missing facilities, see our guide to selling a house in poor condition.
If your property is unmortgageable, you still have options. The right one depends on the defect, how much it would cost to fix and how quickly you want to move on.
This can make sense when the problem is clearly defined, affordable to correct and likely to satisfy lender criteria once the work is complete. Examples might include obtaining missing paperwork, carrying out specific repairs or resolving a lease issue.
The downside is that you pay for the work upfront and may need to wait for reports, guarantees, freeholder negotiations or building regulation approval before mortgage approvals become easier.
Auctions can attract investors who are comfortable buying unusual or defective properties. They can work well for some unmortgageable homes, but there are entry, legal and selling costs to consider, and the property still needs to reach its reserve.
If you are considering this route, our guide to how property auctions work explains the process, fees and reserve price in more detail.
A genuine cash buyer does not need a residential mortgage to complete, so the issue that caused previous buyers or lenders to withdraw does not automatically stop the sale.
This is often the simplest route when the problem is expensive to fix, difficult to document or likely to take a long time to resolve. The trade-off is price. A cash buyer will take the defect, repair costs and resale risk into account when valuing the property.
You can read more about the wider process in our guide to selling a house for cash.
When a lender refuses to finance a property, the buyer pool becomes more limited. Cash buyers and specialist property investors are usually better placed to deal with structural issues, short leases, non-standard construction and other defects because their purchase does not rely on the same mortgage approval.
Property Saviour buys houses and flats with a range of mortgageability problems, including Japanese knotweed, subsidence, fire damage, short leases, sitting tenants and non-standard construction.
For example, if the problem is fire damage, see our dedicated guide to selling a fire damaged house. If the construction itself is causing problems, our Laing Easiform property guide is one example of how lender criteria can affect non-standard homes.
There is no easier way to sell a house today.
There is no standard percentage discount for an unmortgageable property. Its value depends on what makes it difficult to finance, how much that issue will cost to resolve and what the property would realistically be worth once the problem is dealt with.
A short lease with relatively few years remaining will be valued differently from a house with active structural movement. A property with missing planning permission will also be different from one with no working kitchen or bathroom. The valuation needs to reflect the specific problem rather than applying one generic discount to every unmortgageable home.
Property Saviour’s direct cash purchase is based on 70% of a realistic valuation, with the known defect taken into account when assessing the property.
| Cost Category | Percentage |
|---|---|
| Your cash offer | 70% |
| Legal costs | 2% |
| Holding costs | 3% |
| Stamp duty | 5% |
| Resale costs | 5% |
| Gross profit before tax | 15% |
The purpose of showing the breakdown is to make it clear how the direct-purchase model works. You can then compare that offer with the likely cost and timescale of fixing the problem yourself or trying another selling method.
Sometimes. If the problem is relatively straightforward, fixing it may open the property back up to mortgage buyers and could help you achieve a higher sale price.
Before committing money, find out exactly what the lender or surveyor has objected to. There is little value in paying for work that does not actually change the lender’s decision.
It is also worth thinking about the long term. Some problems need more than a quick repair. Japanese knotweed may require ongoing treatment and monitoring, while short lease issues can involve the freeholder, valuation work and legal negotiations. Structural repairs may also need professional reports before a mortgage lender is satisfied.
If the cost, delay or uncertainty does not make sense for your circumstances, selling the property as it stands may be the more practical option.
The process starts with understanding why the property is unmortgageable. Tell us what you know about the issue and share any survey reports, lender feedback or photographs you already have.
If the direct cash offer is not the right fit, Property Saviour also offers an assisted sale option for some properties. Our guide to how an assisted sale works explains that alternative.
| Method of sale | Value achieved | Fees | Timeframe | Is sale guaranteed? |
|---|---|---|---|---|
| Estate agents | 90–95% | 1–5% | 3–6 months | No – one in three sales collapse |
| Auctioneers | 70–80% | 2% plus | 2–3 months | No – half of properties don’t sell |
| Property Saviour | 70–80% | £0 | 10–28 days | Yes – 99% success rate |
Before accepting an offer, check who is actually buying the property and how the purchase will be funded. Companies House is a useful starting point because you can review the company’s trading history, accounts and registered charges.
You can also ask for proof of funds and confirm that you are free to use your own independent solicitor. A buyer should be comfortable answering reasonable questions about how the purchase will complete.
Our guide to checking a genuine cash house buyer covers the main checks in more detail.
There is no single best option for every unmortgageable property.
If your home has several problems rather than one clear mortgageability issue, our guide to selling a problem property may also be useful.
If you are trying to sell an unmortgageable property, tell Property Saviour what has made the sale difficult and what feedback you have already received from buyers, surveyors or lenders.
You can review the offer, compare it with repairing or auctioning the property and decide whether a direct cash sale makes sense for you. There is no need to fix the mortgageability problem before asking for an offer.
Request a callback to discuss your property and the options available.
Whether you’re facing a tricky sale, navigating probate, or simply looking to sell fast without hassle, you’re in the right place. Our blog is packed with practical advice, expert insights, and real-life tips to help homeowners, landlords, and executors across England, Scotland and Wales make informed decisions — whatever the condition of their property.
