Sell an Unmortgageable Property — Short Lease, Defects, Non-Standard

“Cash buyers only.” It’s a phrase that appears on thousands of UK property listings — and for the seller, it’s often an unwelcome discovery. The moment your property needs that qualifier, the buyer pool shrinks by 70–80%, prices soften, and sales stretch from months to years.

We’re one of the buyers that phrase is aimed at. We buy the properties that mortgage lenders won’t touch, because we’re not a mortgage lender — we’re a principal cash buyer. Our money is our own, and our criteria are our own.

The main categories of unmortgageable property

Short-lease leasehold flats

The single largest category. Most mortgage lenders won’t lend on leases with under 70 years remaining (some draw the line at 80 years). As the lease shortens, the property’s market value drops, and the cost of extending rises.

Short-lease flats are effectively cash-buyer territory. We buy them with the lease as it stands — no requirement for the seller to extend first. The price reflects the lease length, but the transaction itself is straightforward.

Non-standard construction

Properties built outside the UK’s normal brick-and-block tradition. Includes:

• Concrete construction — post-war pre-cast systems (Airey, Cornish, Wates, Woolaway, BISF). Many are designated “defective” under the Housing Defects Act 1984 and need specific remediation before lenders will consider them.
• Prefabricated systems — temporary post-war housing that became permanent. Most are well past design life.
• Timber-frame — some lenders will lend, many won’t. Particularly older timber-frame with unknown provenance.
• Thatched properties — insurance premiums and maintenance costs deter lenders in some cases.
• Converted industrial buildings where structural adequacy for residential use is debated.

We buy all of these. Condition and location drive the offer, not the construction type alone.

Structural issues

• Subsidence — historic (stabilised with underpinning) or active. Both are within our scope, with pricing reflecting the severity.
• Heave and settlement — ground movement other than classic subsidence.
• Severe damp and rot — particularly rising damp affecting structural timbers.
• Cracked render, bowing walls, lintels — visible defects that mortgage surveyors flag.
• Unauthorised alterations that affect structural integrity — typical of old extensions without building regs approval.

Cladding and fire safety

Post-Grenfell, UK mortgage lenders require EWS1 certification on many flats. Blocks with B2-rated cladding are often mortgage-dead until remediation completes. We buy these, factoring the remediation uncertainty into our offer.

Legal title defects

• Missing or defective title — absent freeholder, broken chain of ownership, missing transfer documents.
• Restrictive covenants that materially affect use.
• Rights of way or shared access disputes.
• Enfranchisement in progress — partial or contested.
• Tenancy or occupancy claims beyond standard ASTs.

Title defects can often be resolved via indemnity insurance or with time and specialist legal work. We’re comfortable with the risk on most, and we buy the property “as is” rather than requiring the title to be perfected first.

Environmental and location factors

• Mining areas with known or suspected shaft/void issues.
• Contaminated land from historic industrial use.
• Flood risk properties in Environment Agency high-risk zones.
• Japanese knotweed — treated, untreated, or requiring ongoing management plans.
• Nearby infrastructure (HS2, airport flightpaths, proposed major developments) that affects valuation.

How we price an unmortgageable property

Our approach is to start with the open-market comparable value of a hypothetical equivalent property without the issue, then apply a specific discount for the specific issue:

The ranges depend on the specifics. We explain each component in our written offer.

Offers on unmortgageable property typically land between 70% and 88% of hypothetical-mortgageable market value. The market for these properties is thinner than for standard stock, and the specific risk factors add cost to us — but we try to pay at the upper end of the range wherever possible.

What we need from you at offer stage

• Postcode and address.
• The specific issue (or issues) that make the property unmortgageable. Be candid — we’ll find out in due diligence regardless, and early disclosure speeds the process.
• Any paperwork you have — EWS1 certificate, structural survey, subsidence monitoring records, lease documents, indemnity policies, knotweed management plans.
• What a previous buyer’s lender said, if a sale has already fallen through for lender reasons.

With that, a written offer within 24 hours is realistic.

Related terms

• Cash buyer — and what “cash buyers only” actually means.
• Leasehold vs freehold — why short leases become unmortgageable.
• EWS1 form — the cladding certification affecting many flats.
• Restrictive covenant — one source of title defects.
• Conveyancing — still required, even on cash-only sales.

Start an offer on your unmortgageable property

If a lender has declined, or if you know your property has one of the issues above, share the details. We’ll come back within 24 hours with a realistic, written offer and an explanation of how we arrived at it.