Planning a house extension? Discover the average cost of house extension work in the UK, typical 2026 price ranges per square metre, example budgets for 20m², 30m² and 40m² projects, and the key factors that affect your final spend. Learn what extras to allow for before requesting builder quotes with confidence.
Wondering how much are extensions UK? This homeowner cost guide explains typical build price ranges, what drives costs up (groundworks, steelwork, spec and access), and what’s often missing from quotes. Learn how planning permission and Building Regulations affect your budget, plus a simple step-by-step method to estimate costs confidently.
Planning to extend your home in England? Discover how much extensions cost in 2025, from single to double-storey builds. Learn the real-world prices per m², what affects your budget, and how to stay compliant with planning permission and Building Regulations — all explained clearly for homeowners.
Planning a single storey extension? Costs in the UK typically range from £1,800–£3,000 per m², with total prices between £45,000 and £90,000+. This guide breaks down rear, side and wrap-around costs, regional variations, council quirks, and the extra fees you’ll need to budget for to avoid hidden surprises.
