Which Lenders Accept Non-Standard Properties?

Why property type matters for mortgage approval

Not all properties are treated equally by mortgage lenders. The construction type, usage, height, and history of a property all affect which lenders will offer a mortgage on it and on what terms. If you are buying or remortgaging a property that falls outside the standard brick-and-mortar definition, choosing the right lender is critical.

The good news is that most non-standard property types are mortgageable. The common assumption that ex-council homes, flats above shops, or concrete-built properties cannot get mortgages is simply wrong. However, the range of willing lenders varies significantly by property type, and some lenders offer better rates and higher LTV ratios than others for the same property.

Lender caution around non-standard properties comes down to resale risk. If a borrower defaults, the lender needs to sell the property to recover the debt. Properties that are harder to sell or harder to value attract stricter criteria. Understanding this helps you frame your application in the strongest possible way.

Property types acceptance table: 26 lenders compared

The table below shows which UK lenders accept each property type. “Yes” means the lender accepts as standard. “Refer” means case-by-case underwriter assessment. A dash means insufficient data or very limited acceptance.

Data sourced from published lender criteria and broker sourcing systems, April 2026. Policies can change without notice. Always verify with the lender or a broker before applying.

Ex-council properties

Ex-council properties are among the most commonly misunderstood property types in the mortgage market. Many buyers assume they will struggle to get a mortgage on a former council house or flat, but the data tells a different story: 22 of 26 lenders in our comparison accept ex-council properties as standard.

The key factors lenders assess for ex-council properties are location, condition, and the surrounding area. A well-maintained ex-council house in a mixed-tenure estate is treated very differently from a run-down flat on a large social housing estate. Many ex-council properties are indistinguishable from privately built homes and attract no additional scrutiny at all.

Where lenders are more cautious is with ex-council flats in large housing blocks, particularly if the block is predominantly still social housing. Some lenders apply minimum percentage thresholds for private ownership in the block, typically wanting at least 50% of units to be privately owned. Others set minimum property values to ensure the property has sufficient resale market.

Ex-council houses generally face fewer restrictions. If the property has been privately owned for some time, is in reasonable condition, and is in an area with active resale demand, most lenders treat it the same as any other house. Right to Buy purchasers should be aware that some lenders require the property to have been in private ownership for a minimum period, typically three to five years.

Non-standard construction

Non-standard construction covers a wide range of building methods that differ from traditional brick and block. This includes timber frame, steel frame, concrete panel (pre-fabricated reinforced concrete or PRC), modular construction, cob, thatched roofs, and other unusual build types.

Timber frame: This is the most commonly encountered non-standard construction type and is accepted by the vast majority of lenders. Modern timber frame homes built to current standards are barely considered non-standard any more. Older timber frame properties may require a structural survey but are still widely mortgageable.

Steel frame: Steel-framed properties, including British Iron and Steel Federation (BISF) houses, are accepted by many lenders, particularly if a structural engineer has confirmed the property is in good condition. Some lenders require a specialist report, but this is straightforward to obtain and does not prevent approval.

Concrete panel and PRC: Concrete construction is where lender attitudes diverge most sharply. Some PRC property types, such as Airey, Cornish, Reema, and Wimpey No Fines houses, have known structural issues. Lenders typically require a PRC certificate confirming that any structural repairs have been completed to an approved standard. Without this certificate, many lenders will not proceed. With the certificate, most accept the property.

Modular and modern methods of construction (MMC): As factory-built and modular homes become more common, lender acceptance is improving. Several lenders now actively support MMC properties, recognising them as high-quality and energy efficient. However, the market is still evolving and some high-street lenders remain cautious.

New build properties

New build properties are accepted by almost all lenders, but they come with specific restrictions that do not apply to existing homes. The most significant restriction is a lower maximum loan-to-value ratio.

Many lenders cap new build mortgages at 85% LTV for houses and 75% LTV for flats, compared with 90% or 95% LTV available on existing properties. This means you typically need a larger deposit when buying new build. The reason is that new build prices often include a premium over the underlying land and construction value, and lenders want protection against any initial value drop.

New build flats attract the most caution. Lenders are particularly wary of new build flats in large developments where many units are being sold simultaneously. They may impose exposure limits, meaning they will not lend on more than a certain percentage of units in a single development. This is not a reflection on the buyer but a portfolio risk management decision by the lender.

Developer incentives can also complicate new build mortgages. If the developer is offering cashback, furniture packages, or other incentives, the lender may reduce the property valuation to account for these. This can affect the LTV ratio and therefore the deposit required.

Despite these restrictions, new builds remain straightforward to mortgage. Twenty-two of 26 lenders in our comparison accept new builds as standard. The key is ensuring your deposit is sufficient for the lender's new build LTV limits and that the development is registered with a recognised warranty provider such as NHBC, Premier Guarantee, or LABC.

Flats above commercial premises

Flats above shops, restaurants, or other commercial premises are a more specialist property type, but they are far from unmortgageable. Twenty of 26 lenders in our comparison accept semi-commercial properties, either as standard or on referral.

Lender criteria for flats above commercial typically focus on the type of commercial use below. A flat above an office, retail shop, or hairdresser is generally viewed favourably. A flat above a takeaway, pub, or nightclub may face stricter assessment due to noise, odour, and fire risk concerns.

Most lenders require the residential portion to have a separate entrance from the commercial unit. They also want to see a clear lease separating the residential and commercial elements, particularly for flats in mixed-use buildings. Some lenders impose minimum floor area requirements or maximum commercial-to- residential ratios.

If you are buying a property where you own both the flat and the shop below (for example, a live-work unit), this falls into mixed-use territory and most residential lenders will not consider it. You would need a semi-commercial or commercial mortgage instead. However, if you are simply buying the flat portion above an independently operated commercial unit, a standard residential mortgage is usually available.

High-rise flats

High-rise flats, generally defined as those in buildings above six storeys, are accepted by the majority of lenders. Twenty- three of 26 lenders in our comparison accept high-rise properties, either as standard or on referral.

The main consideration for high-rise flats since 2020 has been cladding and fire safety. Following the introduction of the Building Safety Act 2022, lenders require an EWS1 (External Wall System) form for buildings above 11 metres (roughly four storeys) where the external wall system includes combustible materials. An A1 or B1 rating on the EWS1 form means the building passes and lending can proceed normally. A B2 rating means remediation is needed, and many lenders will not lend until works are completed.

For newer high-rise buildings that have been constructed to post-Grenfell standards and have appropriate fire safety documentation, most lenders are comfortable lending. The building must have a valid warranty, appropriate service charge arrangements for ongoing maintenance, and satisfactory fire safety assessments.

Some lenders impose maximum floor restrictions. For example, a lender might accept flats up to the 20th floor but refer anything above that. Others have no floor limit provided the building meets fire safety standards. If you are buying in a very tall building, checking with a broker who has access to detailed lender criteria is recommended.

Lease length is another important factor for high-rise flats. Most lenders require a minimum unexpired lease of 70 to 85 years at the time of application. Short leases below this threshold can make the property unmortgageable with many lenders, regardless of the building type.

Frequently asked questions

Can I get a mortgage on an ex-council house?

Yes. Twenty-two of 26 lenders in our comparison accept ex-council properties as standard. The key factors are the property's condition, location, and whether it is a house or flat. Ex-council houses are widely accepted. Ex-council flats in large blocks may face additional scrutiny around the percentage of private ownership in the building.

Do lenders accept timber frame houses?

Yes. Timber frame is the most commonly accepted non-standard construction type. Modern timber frame homes built to current building regulations are accepted by virtually all lenders. Older timber frame properties may require a structural survey but remain widely mortgageable.

Can I get a 95% mortgage on a new build?

It is very difficult. Most lenders cap new build mortgages at 85% LTV for houses and 75% LTV for flats. This means you typically need at least a 15% deposit for a new build house and 25% for a new build flat. A small number of lenders offer higher LTV on new builds, but they are the exception.

Will lenders mortgage a flat above a shop?

Yes, many will. Twenty of 26 lenders in our comparison accept flats above commercial premises. The type of commercial use matters: a flat above a quiet retail unit is viewed more favourably than one above a restaurant or takeaway. A separate entrance to the flat is usually required.

Do I need an EWS1 form for a high-rise flat?

For buildings above 11 metres where the external wall system includes combustible materials, most lenders require an EWS1 form. An A1 or B1 rating means the building passes and lending can proceed normally. Buildings below 11 metres or those with no combustible cladding may not need an EWS1, but this depends on the individual lender's policy.

Can I mortgage a concrete or PRC house?

Yes, provided the property has been repaired to an approved standard and holds a PRC certificate. Without the certificate, many lenders will decline. With it, most accept the property. Several lenders in our comparison, including Accord, Cambridge BS, Co-op Bank, Clydesdale, and Vida, accept concrete properties as standard. Others such as NatWest, Saffron BS, and Pepper Money will assess on referral.

Check your affordability

If your property is non-standard, ex-council, new build, or above commercial premises, checking across multiple lenders ensures you find one that accepts the property type and offers the best terms. The difference between lenders can mean a higher LTV, a better rate, or simply an approval where another lender would decline.

Last updated: April 2026