What "non-standard construction" actually means
A standard construction property has masonry walls and a tiled or slated roof. Anything materially different is non-standard: concrete, steel frame, timber frame, cross-wall, prefabricated systems, thatch, and a long tail of regional and post-war building methods. Scotland has a great deal of it, because a lot of public housing built between the 1940s and the 1970s used system-built methods that were quick to erect.
The label itself decides nothing. It tells a lender to look more carefully; it does not tell them to decline. What determines the outcome is the condition of the specific property, what the valuer says about it, and whether that particular lender has appetite for that particular method.
Why lenders treat it differently
A lender is not really assessing the building. It is assessing how easily it could sell the property if it ever had to. A construction type that few lenders will finance has a smaller pool of buyers, which makes it harder to sell, which is what makes a lender cautious. The concern is resale liquidity as much as structural soundness.
That is why two properties in identical condition can produce different answers. If one method has an established repair scheme and a body of lender experience behind it and the other does not, the lending will follow the evidence rather than the brickwork.
The construction types that come up most in Scotland
- In-situ and precast concrete — Poured or panel concrete systems used widely in post-war housing. Treatment varies enormously between specific systems, and some designated types have their own repair and certification regimes.
- Steel-framed housing — A steel skeleton with an infill or cladding. Lender appetite often depends on whether the frame has been inspected and on the condition of any cladding.
- Timber frame — Common in modern Scottish new build and generally well accepted, particularly where it is a modern system with a brick or block outer leaf. Older or unusual timber systems are looked at more carefully.
- Prefabricated and system-built — A broad category covering many named systems. This is where the specific system name matters most, because lender lists are system-specific rather than category-wide.
- Cross-wall and no-fines concrete — Including Wimpey No-Fines, covered in more detail below.
We deliberately do not publish a list of which lenders accept which system. Those lists change without notice, they vary by loan to value and by individual valuer, and a list that is three months out of date is worse than no list at all. What we do instead is check current criteria against your specific property before anyone applies.
Wimpey No-Fines
Wimpey No-Fines is one of the most common non-standard types in Scotland, and one of the most misunderstood. It is a poured in-situ concrete method: the concrete deliberately omits the fine aggregate, leaving a coarse, open-textured material that was poured into shuttering on site. Large numbers were built from the late 1940s onwards, many of them for local authorities and later bought under right to buy.
The important distinction is that No-Fines is in-situ concrete rather than a precast panel system. It is generally regarded more favourably than several precast systems, and a number of mainstream lenders will consider it, which surprises people who have been told that "concrete means no mortgage". Others still decline it, and some will only lend at a reduced loan to value.
- Confirm what you are actually buying — No-Fines is often confused with precast systems. The Home Report and the valuer's comments are where this gets established, not the estate agent's description.
- Expect the valuer to comment — A surveyor is likely to note the construction and may recommend a further specialist report. That is normal rather than a warning sign.
- Watch for later alterations — Rendering, overcladding, extensions and structural alterations affect how a property is viewed, sometimes positively where work was properly certificated and sometimes not.
- Keep the paperwork — Where repair or improvement work has been carried out, the certification for it is frequently what makes a case work.
We have taken the view that Wimpey No-Fines is better covered properly here, alongside the other systems and the valuation process, than on a separate page. The buying decision, the survey questions and the lender constraints are the same ones — only the system name changes.
The Home Report, the valuation and specialist reports
In Scotland the Home Report gives you a starting position before you offer, which is a real advantage on a non-standard property. The single survey will usually identify the construction and flag anything that concerns the surveyor, and the lender's own valuation then follows.
Where a further report is asked for — a structural engineer's report, or a specialist assessment of a particular system — it is worth treating that as part of the process rather than as a setback. A clear specialist report frequently turns a hesitant lender into a willing one. An absent one leaves the lender assuming the worst.
No construction label is a substitute for that evidence. A property of an "acceptable" type in poor condition can still be declined, and a property of a difficult type with proper certification can still proceed.
Remortgaging a non-standard property
Remortgaging brings the same questions round again, and the pool of lenders may have changed since you bought. People are sometimes caught out at the end of a fixed rate, assuming a switch will be straightforward because the original purchase went through.
If your property is non-standard, allow more time than you would for an ordinary remortgage and start earlier. Where the existing lender offers a product transfer without a new valuation, that is sometimes the pragmatic answer even if the headline rate is not the sharpest available.