Search "UK construction cost per square metre" and you'll land on four different sites quoting four different numbers, none of which explain why they disagree. One says £1,800. Another says £2,800. A third throws out a single national average as if a warehouse in Sunderland and a townhouse extension in Kensington belong on the same line. They don't, and treating them as if they do is how budgets go wrong before a single trade is booked.
This page is the starting point for Blaze's cost content, not the finish line. Below you'll find current UK cost ranges by building type and region, the reasons those ranges are so wide, and links through to the two guides that go deeper: a full annual breakdown of 2026 construction costs, and a practical walkthrough of how to budget a project from first sketch to final account.
Key Takeaways
- Residential new-build costs in the UK currently sit between £1,700/m² and £4,000/m²+, with location and specification doing most of the work in that spread.
- Inner London runs £2,800-£4,000/m², the North East runs £1,700-£2,200/m², and everywhere else sits somewhere between the two.
- Labour shortages, material inflation, and the Building Safety Act 2022 are the three factors pushing 2026 costs above what most homeowners remember from pre-2022 quotes.
- A published £/m² range tells you the ballpark. It doesn't replace a measured estimate built from your actual drawings and site conditions.
On This Page
- How UK construction costs are actually structured
- Residential costs by building type
- Regional cost variation
- Commercial and industrial ranges
- Why 2026 costs sit above older benchmarks
- How to use these ranges without getting misled
- Common mistakes when comparing a quote against a range
- Where to go next in this guide
- FAQ
How UK construction costs are actually structured
A £/m² figure is a shorthand for hundreds of individual cost lines rolled into one number: substructure, superstructure, internal finishes, mechanical and electrical services, external works, preliminaries, and contingency. Two projects share the same floor area and land on completely different totals because the mix underneath that headline number is different.
Published ranges usually cover build cost only, meaning the physical construction. They typically exclude land, professional fees, VAT where applicable, and any furniture, fittings, or landscaping beyond the basics. When a builder's quote comes in above a published range, the gap is often one of these exclusions rather than the builder overcharging.
Residential costs by building type
These are current UK build-cost ranges for residential work, before land, fees, and VAT. They reflect standard specification; premium finishes push the top end higher.
| Building type | Cost range (£/m²) |
|---|---|
| Terraced house | £1,800 – £2,400 |
| Detached house | £2,000 – £2,800 |
| Low-rise flats | £2,000 – £2,800 |
| High-rise apartments (10+ storeys) | £2,800 – £4,000+ |
| Social/affordable housing | £1,900 – £2,500 |
| Single-storey extension | £1,200 – £2,000 |
| Dormer loft conversion | £1,200 – £1,500 |
Extensions and loft conversions sit lower per square metre than new houses because they reuse an existing foundation, roof structure, or party wall, cutting out some of the most expensive line items in a full build.
Regional cost variation
Location changes labour rates, material delivery costs, and site access constraints, and the gap between the cheapest and most expensive UK regions is large enough to swing a project budget by tens of thousands of pounds on an identical design.
| Region | Cost range (£/m²) |
|---|---|
| Inner London | £2,800 – £4,000 (premium schemes £5,000+) |
| Outer London / Home Counties | £2,400 – £3,200 |
| South East (excl. London) | £2,200 – £3,000 |
| Midlands | £2,000 – £2,700 |
| North West | £1,900 – £2,600 |
| Yorkshire and the Humber | £1,800 – £2,400 |
| North East | £1,700 – £2,200 |
| Scotland | £2,000 – £2,800 |
| Wales | £1,800 – £2,400 |
A project in the North East and an identical project in Inner London differ by £2,000 per square metre before either site has a single design decision that isn't shared with the other.
Commercial and industrial ranges
Commercial and industrial costs follow the same regional logic but start from a different baseline, driven by servicing intensity rather than finish quality alone.
| Sector | Cost range (£/m²) |
|---|---|
| Standard distribution warehouse | £900 – £1,400 |
| Standard Cat A office | £2,200 – £3,200 |
| High-spec office (BREEAM Excellent) | £3,200 – £4,500 |
| Retail shell and core | £1,500 – £2,200 |
| Primary and secondary schools | £2,200 – £2,800 |
| Acute hospitals | £4,500 – £7,000+ |
Healthcare sits at the top of nearly every list because mechanical and electrical systems consume 35-50% of the build cost on a hospital, against roughly 15-25% on a standard house. Warehouses sit at the bottom for the opposite reason: large floor areas, minimal internal finish, and simple servicing.
Why 2026 costs sit above older benchmarks
Anyone comparing a 2026 quote against a figure they remember from a few years ago is usually comparing against a different regulatory and labour landscape.
Skilled trades are in short supply across most UK regions, which pushes day rates up regardless of material costs. Timber, copper, and specialist insulation have all seen sustained price pressure, and steel remains above pre-pandemic levels. On top of that, updated thermal and ventilation standards under Parts L and F of the Building Regulations, along with the compliance and professional-fee burden the Building Safety Act 2022 places on multi-storey residential schemes, mean a spec that satisfied Building Control in 2021 no longer clears it without extra cost.
Related standards reading
If a quote references NRM2 measurement or you're unsure why two "identical" cost plans came in differently, the NRM2 estimating standards guide explains how measurement rules affect the numbers you're comparing.
How to use these ranges without getting misled
A published range is a sanity check, not a quote. Here's how to put it to work without leaning on it too hard.
Start with the region, not the national figure
National averages flatten a £2,000 per square metre regional spread into one meaningless middle number. Pull the range for your actual region first, then adjust for specification. Skipping this step is the single most common reason homeowners feel "ripped off" by a quote that is, in fact, in line with local market rates.
Match the specification tier honestly
The low end of each range assumes a builder-grade specification: standard sanitaryware, laminate or basic timber flooring, and off-the-shelf joinery. Underfloor heating, stone worktops, bifold doors, and architect-specified finishes all sit above the base range, sometimes well above it. If your mood board looks like a magazine shoot, budget from the top third of the range, not the bottom.
Treat site conditions as a separate line, not a rounding error
Sloping sites, poor ground conditions, restricted access for plant and deliveries, and proximity to party walls each add cost that a generic £/m² figure can't see. A site survey and ground investigation early in the process catch most of these before they become mid-project surprises.
Common mistakes when comparing a quote against a published range
Three patterns come up repeatedly when a quote and a published range don't match, and none of them mean the quote is wrong.
Comparing gross internal area against a different measurement basis. Some quotes price against gross external area, others against gross internal area, and the two differ by 8-10% on the same building. Ask which basis a quote uses before assuming it's out of line.
Forgetting that ranges exclude fees and VAT. A quote that includes architect fees, structural engineer costs, Building Control fees, and VAT will always look higher than a build-cost-only range, because it's answering a different question.
Anchoring to a figure from a friend's project. A neighbour's extension from two years ago reflects that year's material prices, that site's access conditions, and that specification. It's a data point, not a benchmark, and using it as one is one of the more common ways homeowners end up disappointed by their own budget.
Where to go next in this guide
The ranges above are a starting point, useful for sanity-checking a quote or shaping an early budget conversation. Two guides in this cluster take you further, depending on what you need next.
Ranges are useful for planning conversations. They're not a substitute for a cost plan built against your actual drawings.
Request a Measured EstimateFrequently Asked Questions
Most UK new-build houses cost between £1,800 and £2,800 per square metre for standard specification, excluding land, fees, and VAT. A typical 4-bedroom detached house of 150m² therefore lands somewhere between £270,000 and £420,000 in build cost alone, before those additions.
Specification, site conditions, and location all move the number independently. A basic finish on an easy site in a low-cost region and a premium finish on a constrained site in London differ by £2,000 per square metre on paper-identical floor areas, so a single average misleads almost everyone who reads it.
No. The ranges on this page cover build cost only. VAT treatment depends on the project type, for example new-build residential work is typically zero-rated while most renovation work carries standard-rate VAT, so this needs adding separately based on your specific project.
Labour rates, site access restrictions, material delivery costs, and land-related constraints all compound in dense urban areas. Inner London routinely runs £2,800-£4,000 per square metre against £1,700-£2,200 in the North East on comparable specification.
The principle is the same but the baseline is lower, because an extension reuses existing foundations, party walls, and sometimes roof structure. Single-storey extensions typically run £1,200-£2,000 per square metre against £1,800-£2,800 for an equivalent new house.
Material and labour markets move continuously, so cost guides need refreshing at least annually to stay useful. The complete breakdown linked above is updated on that cycle and is the better reference once you're past early-stage planning.
Most gaps trace back to three things: a higher specification than the range assumes, fees and VAT included in the quote but not the range, or site conditions such as poor ground or restricted access that a generic figure doesn't account for. Ask the quoting contractor to break the total down by element so you can see exactly which line is pushing the figure up.
The ranges on this page are based on gross internal area, the industry-standard basis for most residential cost guides. Gross external area, which includes wall thickness, typically runs 8-10% higher for the same building, so it's worth confirming which basis any quote you're comparing against uses.
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