The short version, before you read another word: Airey houses are classified as defective under the Housing Act 1985, which makes them significantly more complicated to buy, sell, and finance than a standard property. That doesn’t mean you shouldn’t buy one, but it does mean you need to understand exactly what you’re getting into before you commit, because the wrong decision here can lock you into a property that’s genuinely difficult to exit.
We’ve handled plenty of Airey purchases over the years, both repaired and unrepaired, and we know the questions that come up consistently from buyers who’ve found one they like at a tempting price. So here’s what you actually need to know.
What an Airey House Is
The Origin and Design
Airey houses were designed by Sir Edwin Airey and built between roughly 1945 and 1955 to address the post-war housing crisis. Around 26,000 were constructed across the UK, primarily by local authorities and almost exclusively as social housing. The design uses precast reinforced concrete (PRC) columns and ship-lap concrete cladding panels around a steel internal framework, which made them quick to build and economical at a time when bricks and skilled labour were both in short supply.
How to Spot One
You can usually spot an Airey house by the distinctive concrete posts visible at intervals along the external walls, with horizontal concrete panels filling the spaces between. The roofs are typically traditional pitched tiles. The two-storey semi-detached layout is the most common, often in rows on post-war council estates.
These houses were originally intended as a temporary solution but ended up serving for decades, and many are still standing today. Some have been repaired under the PRC scheme and look very different from the original construction; others remain in something close to their original form, with the concrete columns and panels still visible from the street.
The Defective Designation
The Underlying Structural Problem
Here’s where it gets serious. In 1984, fundamental defects were identified in Airey houses. The reinforced concrete structural posts (which are concealed within the cavity wall and not visible to normal inspection) were found to suffer progressive corrosion of the embedded steel reinforcement, causing the concrete to crack and spall over time. The defects affected, actually or potentially, every house of this type.
The Legal Response
The government responded with the Housing Defects Act 1984, later consolidated into Part XVI of the Housing Act 1985, which formally designated Airey houses as defective alongside several other PRC types including Cornish Unit, Wates, Reema, Woolaway, Unity, and Orlit houses. The designation came with assistance schemes for affected owners (90% grant towards repair or 95% repurchase at defect-free value), but those schemes have now closed for most owners. The deadline for applications was 30 November 1994 for most designated types.
The practical effect of the defective designation is significant. Most mortgage lenders will not lend on an unrepaired Airey house at all. Insurance is more expensive and harder to arrange. Resale is genuinely difficult. And the underlying structural concern remains, which is that the concrete posts will continue to deteriorate over time unless the property is repaired under an approved scheme.
The PRC Repair Question
This is where the decision really lives.
Repaired vs Unrepaired
An Airey house that has been repaired under an approved PRC scheme, with proper certification (usually issued by PRC Homes Ltd before it closed in 1996, or by an experienced structural engineer for more recent repairs), is a genuinely different proposition from one that hasn’t.
The repair typically involves removing the concrete panels and columns and replacing them with traditional brick and blockwork, with the foundations extended to support the new wider cavity walls. The work takes 6 to 7 weeks, the occupants can usually stay in place during the work, and the finished house is structurally indistinguishable from a brick property. With proper certification, the property becomes mortgageable through mainstream lenders, insurable at normal rates, and saleable on the open market.
Why Certification Matters
Without certification, none of that applies. An unrepaired Airey house, or one that’s been partially repaired (such as over-clad with brick without removing the original PRC structure), or one repaired without proper documentation, defaults back to non-standard treatment and faces all the original lending and resale problems.
The Neighbour Issue
One specific complication worth understanding: under the PRC certification scheme, a repaired property has to be capable of standing alone, even if it’s structurally attached to another property. For semi-detached Airey houses where the neighbour hasn’t been repaired, this matters. Some lenders won’t mortgage a repaired property attached to a non-repaired property, and the visual mismatch can also affect the value when you come to sell.
Should You Buy One?
Here’s our honest take after handling many of these purchases.
Properly Repaired With a Repaired Neighbour
A repaired Airey house with proper PRC certification, where the neighbour has also been repaired and the surrounding properties look consistent, can be a sensible purchase. You’ll usually pay 5% to 10% below an equivalent brick property in the same area, the mortgage situation is normal, and the long-term ownership prospects are basically the same as for any other house. The discount represents the slight residual stigma of the construction type rather than any meaningful current risk.
Repaired With Unrepaired Neighbour
A repaired Airey house where the neighbour hasn’t been repaired is more complicated. The lender pool narrows, the visual mismatch affects resale, and you’re somewhat exposed to whatever happens next door. Whether this works depends heavily on the local context and how much the discount reflects the additional complication.
Unrepaired Airey
An unrepaired Airey house should generally be approached very cautiously. The property is unlikely to be mortgageable through mainstream lenders, the structural deterioration will continue regardless of how well you maintain the property, and you’re essentially buying a property that will eventually require either repair (typically £40,000 to £80,000 depending on the property and current rates) or sale to a cash buyer. Some investors deliberately buy unrepaired Airey houses at substantial discount with the intention of carrying out the repair scheme to add value, but this is a specialist undertaking rather than a normal purchase.
The Practical Steps Before You Buy
If you’re seriously considering an Airey house, here’s what you should do before committing.
Get a Specialist Structural Survey
Get a specialist structural survey from a surveyor with specific experience of PRC properties. The basic mortgage valuation will not tell you what you need to know. A full Level 3 survey by someone who understands the construction type can identify the condition of the structural posts (if the property is unrepaired), confirm the integrity of any repair work that has been carried out, and flag any issues with the property’s specific situation.
Confirm PRC Certification
Confirm the PRC certification status if the property has been repaired. The seller’s solicitor should be able to provide the original PRC certificate, the repair documentation, and any relevant warranty information. If the property has been repaired but no certificate exists, you should treat it as unrepaired for mortgage and insurance purposes, regardless of what the structure looks like.
Get Your Mortgage Position Confirmed
Get a clear position from your mortgage broker before going further. Specialist brokers familiar with non-standard construction will know which lenders are currently active for repaired and unrepaired Airey houses, what conditions they typically apply, and what realistic LTVs you can expect. Going into the process without this clarity is a recipe for late-stage problems.
Check the Neighbour
Check the neighbour. For semi-detached Airey houses, the neighbour’s repair status (or lack of it) directly affects your mortgage options and resale prospects. Visit the surrounding properties on the street and form a view about whether the wider area has been substantially repaired or remains a mix.
Selling an Airey House
If you already own an Airey house, repaired or unrepaired, and you’re trying to sell, the open market route is significantly slower than for a standard property. Repaired Airey houses with full certification typically sell in similar timeframes to brick properties, though the buyer pool is somewhat narrower. Unrepaired Airey houses can take 6 to 12 months or more, with multiple fall-throughs at survey stage being common.
For owners who need a faster, more certain exit, a specialist cash buyer who handles PRC properties – like us – can typically complete in seven days regardless of repair status, with all legal fees and surveys covered. The trade-off is the usual discount below open market value, but the alternative for unrepaired properties is often a sale that doesn’t actually happen.
The Bottom Line
Airey houses aren’t a normal residential purchase, and the defective designation creates genuine complications that don’t apply to brick properties or even to most other non-standard construction types like BISF. A properly repaired and certified Airey house in a consistent area can work well for an owner-occupier who understands what they’re buying. An unrepaired Airey house, or one without proper certification, is a specialist purchase that most buyers should avoid unless they’re equipped to handle the complications.
FAQs
What’s the difference between an Airey house and a BISF house?
Airey houses are made of precast reinforced concrete (PRC) panels around a steel frame and are designated defective under the Housing Act 1985. BISF houses are steel-framed with metal cladding and are not classified as defective. The legal status creates significantly different mortgage, insurance, and resale outcomes.
Can I get a mortgage on an unrepaired Airey house?
Generally no, at least not through mainstream lenders. The defective designation means most lenders will not lend until proper PRC repair work has been completed and certified. Some specialist lenders may consider unrepaired properties at significant deposit and rate premium, but the options are very limited.
What does PRC certification actually mean?
It’s documentation confirming that a defective PRC property has been repaired under a recognised scheme to an approved standard. The certification (historically issued by PRC Homes Ltd before it closed in 1996, now usually by experienced structural engineers) is the central evidence lenders use to treat the property as effectively re-traditional.
How much does it cost to repair an Airey house?
Typically £40,000 to £80,000 in 2026 depending on the specific property and the contractor, though prices vary by region and the exact scope of work. The original assistance schemes are now closed for most owners, so this is usually a self-funded cost.
Are Airey houses safe to live in?
Yes, in the immediate sense. The structural defects develop progressively over decades and don’t typically present an acute safety risk, which is why the original assistance schemes allowed continued occupation while properties awaited repair. The concern is long-term deterioration and the resulting financial impact rather than imminent collapse.
