Construction Cost Calculator
Estimate the build cost of a UK residential construction project. Costs per square metre are indicative benchmarks for 2024 — actual costs vary significantly by location, specification, and contractor. Always obtain multiple professional quotes before committing to a project.
Build cost estimate
Typical UK residential build costs (2024 indicative rates):
| Build type | Typical cost/m² | Description |
|---|---|---|
| Basic | ~£1,500/m² | Simple spec, standard materials, minimal features |
| Standard | ~£2,000/m² | Good quality finishes, typical new-build spec |
| Premium | ~£2,800/m² | High-end finishes, bespoke features, larger projects |
Related: Price Per Square Metre · House Price Appreciation
How the Construction Cost Calculator works
This calculator provides indicative build cost estimates for UK residential construction projects. You enter the floor area in square metres, choose a specification level (basic, standard, or premium), and set a contingency percentage to cover unforeseen costs. The calculator applies a cost-per-square-metre rate to produce a rough total estimate.
The benchmark rates used are based on 2024 UK averages. Basic builds at around £1,500/m² represent simple, functional homes with standard finishes. Standard builds at £2,000/m² reflect a typical new-build specification. Premium builds at £2,800/m² or above include high-end finishes, bespoke features, and more complex construction methods.
These figures exclude land cost, planning fees, architect and engineer fees, VAT (which may apply at 20% for non-residential builds), and utility connections. A contingency of at least 10–15% is strongly recommended for self-build and renovation projects.
Frequently asked questions
How much does it cost to build a house in the UK?
UK residential build costs typically range from around £1,500/m² for a basic specification to £2,800/m² or more for a premium finish. A standard 120m² house might therefore cost between £180,000 and £336,000 to build, excluding land, planning fees, architect fees, and VAT. Costs vary significantly by region, with London and the South East generally higher.
What is included in construction cost estimates?
Construction cost estimates typically cover the physical build: foundations, structure, roof, external walls, windows, internal fit-out, and services such as plumbing and electrics. They do not usually include land purchase, Stamp Duty, planning application fees, architect and structural engineer fees, surveys, utility connection charges, or landscaping.
How accurate are construction cost calculators?
Online construction cost calculators, including this one, provide rough indicative estimates only. Actual costs depend on site conditions, ground works requirements, local labour rates, material prices, and your chosen contractor. Always obtain at least three detailed quotes from qualified builders and consider appointing a quantity surveyor for larger projects.
What factors affect construction costs most?
The biggest cost drivers are specification level (materials and finishes), location (labour and transport costs vary widely across the UK), site accessibility and ground conditions, the complexity of the design, and current supply chain pressures. A contingency of 10–20% is strongly recommended to cover unexpected costs.