Guide
The honest answer to the question everyone asks first — build cost per square metre and per square foot, what really moves the number, the costs beyond the build, and how a fixed price works.
In this guide
There's no single price to build a house — but there is a useful starting point. For a good-quality bespoke home in the South East in 2026, the build itself typically costs somewhere between £2,000 and £3,400 per square metre — roughly £185 to £315 per square foot. So a 250 m² family home (about 2,700 sq ft) might be roughly £500,000 to £850,000 to build — before you add the land, professional fees, VAT and a sensible contingency.
Build costs are quoted per square metre across the UK trade, so we lead with that — with the per-square-foot equivalent alongside.
| Level | Build cost |
|---|---|
| Good quality Well-built to a sound standard, mainstream finishes | £2,000 – £2,600 / m² £185 – £240 / sq ft |
| High quality (typical bespoke) Architect-led design, quality joinery, better glazing and M&E | £2,600 – £3,400 / m² £240 – £315 / sq ft |
| Premium / complex Prime finishes, complex structure, difficult or constrained sites | £3,400 + / m² £315 + / sq ft |
How to use it: multiply the internal floor area of the home you want by a figure in the relevant band. A 300 m² home (about 3,230 sq ft) at £2,900/m² — around £270/sq ft — is roughly £870,000 to build. Then add land, fees, VAT position and contingency to reach a total project budget.
The build cost is only part of the total. Budget for these too:
| Cost | Typical scale |
|---|---|
| The land Usually the single biggest number; hugely location-dependent | Varies |
| Build cost The house itself — see the bands above | ~£2,000–£3,400/m² |
| Professional fees Architect, structural & civil engineers, surveys, planning | ~6–15% of build |
| Planning & council Application fees, and any CIL or Section 106 contributions | Site-specific |
| Warranty & building control Structural warranty (e.g. 10-year) and inspections | ~1–2% of build |
| Finance Self-build / development finance interest and fees, if borrowing | Deal-specific |
| Contingency A reserve for the unexpected — more on complex sites | ~5–10% of build |
Here's the part people miss: a new-build home is zero-rated for VAT, and self-builders can reclaim the VAT paid on most materials through HMRC's DIY Housebuilders Scheme. That relief can be a genuine saving, and it's a real reason a replacement dwelling can beat a big renovation on the numbers — because most renovation work is standard-rated. The rules and eligibility matter, so take current professional advice on your project.
The reason costs "run away" on a build is almost always that they were never fully pinned down at the start. The fix is the same whoever holds the contract: a detailed, fully-costed specification agreed before a brick is laid — structure, finishes, fittings and services all chosen and priced in advance — so you agree a price up front instead of discovering it as you go. There's more than one way to get there:
The right route depends on how hands-on you want to be and who you want building — but in every case the goal is the same: a price you can trust from the outset, and no nasty surprises. If you're not sure which fits, that's exactly the conversation to have first.
As a rule of thumb, building a good-quality home in the South East typically costs somewhere between £2,000 and £3,400 per square metre — roughly £185 to £315 per square foot — for the build itself in 2026. So a 250 m² home (about 2,700 sq ft) might be roughly £500,000 to £850,000 to build, before land, fees, VAT and contingency. The range is wide because size, specification and the site itself move the number a great deal. Treat any per-square-metre figure as a starting point, not a quote.
The UK construction trade quotes build cost per square metre, so that's the figure you'll see most and the one worth working to. Many homeowners still picture their house in square feet, though, so it helps to keep both in view — one square metre is about 10.8 square feet, so a £2,800/m² build is roughly £260/sq ft.
A build-cost figure covers the construction of the house — groundworks, structure, roof, external envelope, internal fit-out, and mechanical and electrical services. It usually excludes the land, professional fees, planning costs, external works and landscaping, finance and VAT. Always check what a given figure does and doesn't include before comparing.
It depends on the plot and what you want. Building rarely beats buying purely on price, but it lets you create exactly the home you want, to a modern energy standard, often with a new-build VAT advantage — and a well-located, well-built new home can hold its value strongly. The honest comparison is finished value versus total cost, including land, on your specific site.
New-build homes are zero-rated for VAT, and self-builders can reclaim the VAT paid on most materials for a new dwelling through HMRC's DIY Housebuilders Scheme. That relief can be a meaningful saving and genuinely changes the maths against renovating, where most work is standard-rated. Take current professional advice, as the rules and eligibility matter.
The key is a fully detailed, costed specification agreed before construction starts, so you commit to a price up front rather than discovering costs as you go. You can get there in more than one way: through design and build, where one team designs and builds under a single contract; or through a managed route, where we act on your side to help you agree and hold a fixed or capped price with your own chosen builder or on a self-build. Either way, the quality of that up-front specification is what removes the surprises.
Thinking about a build?
Tell us what you want to build and where. We'll give you an honest early view on cost and feasibility — and help you lock down a price you can trust, whether we build it or help you secure one with your own builder.
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Figures in this guide are illustrative 2026 ranges for general guidance only — not a quotation, and not financial advice. Costs vary by site, specification and market. Always obtain a project-specific appraisal.
