Builder stages for your new build project
Please note that these are rough guides only. To get a clear cost breakdown of each stage for your new build project, please post your project and get up to 5 free quotes
New Build Home Construction
Once your planning approvals, technical drawings, and specifications are complete, your builder takes charge on-site — transforming your approved plans into a high-quality new home that’s safe, efficient, and built to specification.
Pre-Start & Mobilisation
Plan, schedule, and prepare your site for construction
Groundworks & Foundations
Prepare the site and form the building’s base
Structure & Shell Construction
Raise the walls, floors, and roof structure
Weatherproofing (Watertight Stage)
Seal the building envelope
First Fix Services & Internal Structure
Install hidden services and form internal spaces
Need a new build architect in your area?
Our network of trusted architects is ready to help bring your new build project to life, with over 1,000 homeowners already helped this year.
Builder step-by-step cost guide for your new build project.
(Please note that these are rough guides only; to get a clear cost breakdown of each stage, please post your project and get up to 5 free quotes.)
Builder Cost Breakdown – Typical New Build Home Project
All figures are rough guides only and vary by design complexity, location, and specification. Based on 2025 averages, excluding VAT.
Typical overall cost: £2,000 – £3,500+ per m²
Example: 180 m² new build house ≈ £360,000 – £630,000
Pre-Start, Site Setup & Ground Preparation
3–6%
Approx. cost: £10,000 – £30,000
Groundworks, Foundations & Drainage
10–15%
Approx. cost: £40,000 – £90,000
Superstructure & Structural Frame
20–25%
Approx. cost: £80,000 – £150,000+
Roofing, Windows & External Finishes
10–15%
Approx. cost: £40,000 – £90,000
First Fix Services
8–12%
Approx. cost: £30,000 – £60,000
Find architects, architectural designers, builders & structural engineers in local councils across Greater London
Westminster
Hackney
Newham
Tower Hamlets
Barking and Dagenham
Havering
Waltham Forest
Camden
Enfield
Haringey
Islington
Redbridge
Barnet
Brent
Harrow
Hillingdon
Bexley
Bromley
Greenwich
Lewisham
Southwark
Croydon
Sutton
Hounslow
Kingston upon Thames
Lambeth
Merton
Richmond upon Thames
Wandsworth
Ealing
Hammersmith and Fulham
Kensington and Chelsea
Explore the highlighted area to find local architects and builders near you
Loading map...
