Per-square-metre figures are the most quoted numbers in renovation — and the most misused. They are a useful first filter when you are deciding whether a property is even worth viewing, and a dangerous number to budget on. Here are the realistic 2026 ranges, and the honest limits of what they can tell you.
What are the renovation cost per square metre benchmarks for 2026?
| Level of work | Cost per m² | 3-bed house (~100m²) |
|---|---|---|
| Cosmetic refresh — décor, flooring, light updating | £350 – £600 | £35,000 – £60,000 |
| Mid renovation — kitchen, bathrooms, systems, finishes | £900 – £1,400 | £90,000 – £140,000 |
| Full strip-back refurbishment — structural, high spec | £1,200 – £1,900 | £120,000 – £190,000 |
That mid-renovation row matches what we consistently see on the ground: a full renovation of a 3-bedroom period property in Gloucestershire, Wiltshire or Oxfordshire realistically costs £90,000–£140,000 at mid specification. Most buyers budget around half that — which is exactly why these benchmarks matter as a reality check.
Why is the range within each band so wide?
Because square metres do not capture the things that actually move the money. Two identical-sized houses can be £50,000 apart on renovation cost. The drivers:
- Property age and fabric — period solid walls, lime plaster and original joinery cost more to work on than modern blockwork at every single trade
- The invisible systems — a property needing a rewire and a new heating system starts £15,000–£25,000 behind one that does not, and you cannot see either from the floor area
- Specification — the same kitchen footprint can carry a £5,000 kitchen or a £35,000 one
- Kitchens and bathrooms per metre — these rooms cost several times more per square metre than bedrooms, so a small house with two bathrooms can out-cost a larger one with one
- Access and location — scaffolding, conservation requirements and parking restrictions all land on the invoice
When should you use per-square-metre figures — and when should you stop?
Use them at the search stage: if a property needs a full refurbishment and your budget divided by its floor area gives you £600/m², the numbers do not work and no viewing will change that. That is a genuinely valuable five-second filter. Stop using them the moment you are serious about a specific property — because at that point you are no longer pricing an average house, you are pricing that house, and that house has a particular roof, particular wiring and a particular damp patch behind the sofa.
The rule of thumb about rules of thumb: per-square-metre figures are for deciding whether to look. Trade-by-trade pricing is for deciding what to pay. Confusing the two is how renovation budgets end up 40% short.
How do you get from a benchmark to a real number?
The same way a builder would: walk the property, list the works, and price each trade against current local rates. An independent renovation cost assessment does precisely that before you have committed to buy — room by room, with the making-good, scaffolding and contingencies that benchmarks silently exclude. If you want a quick sense of where you stand first, the free 90-second Renovation Readiness Check will show you your cost range and how prepared you are.
Every renovation job, every range — and why the cheapest quote is usually the most expensive.
From benchmark to real number.
NOROS assessments price the actual works your property needs — trade by trade, at current Gloucestershire, Wiltshire and Oxfordshire rates. Desktop reviews from £99.
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