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Problem Guide7 min readUpdated 5 May 2026
How to Sell an Unmortgageable Property
If mortgage lenders won't touch your property, you might think you're stuck. You're not. Here's how to sell a property that traditional buyers can't finance.
What Makes a Property "Unmortgageable"?
Mortgage lenders are risk-averse. They won't lend against properties they consider too risky to use as security. Common reasons include:
Structural Issues
- Subsidence or movement
- Japanese knotweed
- Underpinning required
- Non-standard construction (concrete, steel frame)
Legal or Lease Issues
- Short lease (under 70-80 years — see gov.uk on leasehold)
- Missing building regulations sign-off
- Flying freehold
- Restrictive covenants
Condition Issues
- No kitchen or bathroom
- Severe damp or rot
- Asbestos presence
- Fire damage
The Core Problem
The large majority of UK property purchases rely on a mortgage — see UK Finance's mortgage market data for the current breakdown. If lenders won't finance your property, you've excluded most of your potential market. This doesn't mean your property is worthless — it means you need a different type of buyer.
Your Options for Selling
Option 1: Fix the Issues First
If the issue is fixable (e.g., short lease extension, minor structural repair), you could invest in fixing it before selling on the open market.
Pros
- Full market value
- Access to all buyers
Cons
- Upfront costs (often £10k+)
- Time delays (months)
- No guarantee of success
Option 2: Sell to a Cash Buyer
Cash buyers don't need mortgages. They buy properties in any condition, with any issues. They factor the problems into their offer rather than walking away.
Pros
- Buy any property type
- No repairs needed
- Quick completion (7-14 days)
- Guaranteed sale
Cons
- Below market value
- Offer reflects issues
Option 3: Auction
Property auctions attract cash buyers and investors who specialise in problem properties. Sales complete within 28 days of the hammer falling.
Pros
- Competitive bidding
- Set completion date
Cons
- No price guarantee
- Auction fees (2-3%)
- Public process
Quick Guide by Issue Type
| Issue | Fix Cost/Time | Best Option |
|---|---|---|
| Short lease (<80 years) | £5k-£30k+ / 3-12 months | Cash buyer or extend first |
| Subsidence | £10k-£50k / 6+ months | Cash buyer (they handle it) |
| Japanese knotweed | £2k-£5k / 3-5 years monitoring | Cash buyer |
| Non-standard construction | Usually unfixable | Cash buyer or specialist lender |
| No kitchen/bathroom | £5k-£15k / 1-2 months | Cash buyer or install first |
The Bottom Line
An unmortgageable property isn't unsellable—it just needs the right buyer. Cash buyers and investors actively seek out these properties because they can see past the issues that scare off traditional buyers. You'll likely get less than a "perfect" property would achieve, but you can still sell and move on.
Got a Problem Property?
We work with buyers who specialise in properties that traditional lenders won't touch. Get a no-obligation assessment to see your options.
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