CostimexFree tool
Construction Cost per Square Foot
Get a quick rough-order-of-magnitude (ROM) construction budget based on area, project type and finish quality.
ROM ranges are ±15% of base rate. Actual cost depends on location, market conditions and design complexity.
Estimated cost range
£297,500 – £402,500
±15% ROM band
Base rate
£175 / ft²
Midpoint
£350,000
FAQ
Common questions
What is the average cost per square foot to build a house in the UK?+
Standard UK residential builds run £165–£215/ft². Economy starts at £120 and luxury reaches £400+/ft². Use the quality selector to match your finish level.
How accurate is this cost calculator?+
It's a rough-order-of-magnitude (ROM) estimate at ±15%. Useful for early budgeting and feasibility — not for bid pricing. For a contract-grade quote use our professional estimating service.
What does the cost per square foot include?+
These rates cover hard construction costs: structure, envelope, MEP, finishes and basic site work. They exclude land, design fees, permits, FF&E, escalation and contractor overhead/profit.
Why is commercial more expensive than residential?+
Commercial buildings need heavier structure, larger MEP loads, fire-rated assemblies, accessibility compliance and commercial-grade finishes — adding 15–25% over comparable residential rates.
How do I get a more accurate estimate?+
Upload your drawings for a full quantity takeoff and CSI-divided estimate, delivered in 24–48 hours. ROM accuracy is ±15%; a detailed estimate is typically ±5–8%.
Need a professional estimate?
Our team delivers full quantity takeoffs and CSI-divided cost estimates in 24–48 hours.