New Build
Construction
Custom new build houses, self-build projects, and garden plot developments across London and Hertfordshire. Turnkey project management from planning through to handover.
New Build Services
From a single self-build on a garden plot to a small residential development, TCM Building manages every aspect of the new build process.
Detached New Builds
Custom-designed detached houses on individual plots, built to your specification from foundations to final finishes.
Semi-Detached & Terraced
New semi-detached and terraced houses, including infill plots and gap-site developments in urban areas.
Self-Build Projects
We work with self-builders to deliver their vision — from groundworks and structure through to first fix and beyond.
Bungalows & Annexes
Single-storey new builds, bungalows, and self-contained annexes for multi-generational living or rental income.
Garden Plot Developments
New builds on garden plots and subdivided land, including planning application management and utility connections.
Commercial New Builds
New commercial buildings, warehouses, and mixed-use developments for business and investment clients.
Our 7-Stage New Build Process
A transparent, structured process that takes your project from initial plot assessment through to keys in hand.
Site Assessment & Feasibility
We assess your plot, review planning constraints, and provide an honest feasibility appraisal — including likely build cost and programme.
Planning Application
We work with architects and planning consultants to prepare and submit your planning application, managing the process through to approval.
Design & Specification
Detailed construction drawings, structural calculations, and a full specification are prepared. We obtain Building Regulations approval before work starts.
Groundworks & Foundations
Site clearance, excavation, drainage, and foundations are laid. We use NHBC-registered subcontractors for all groundworks.
Structure & Weathertight
Superstructure construction — blockwork, timber frame, or steel frame — through to roof, windows, and external doors. The building is made weathertight.
First & Second Fix
All mechanical and electrical first fix, insulation, plasterboard, and internal joinery. Second fix — kitchens, bathrooms, electrics, plumbing, and decorating.
Completion & Handover
Snagging, Building Regulations completion certificate, and full handover pack including all warranties, guarantees, and O&M documentation.
New Build Cost Guide — London 2025
Build costs per square metre for London and Hertfordshire. Excludes land, professional fees, and planning costs.
| Specification | Typical Cost | Notes |
|---|---|---|
| Basic Specification New Build | £1,800 – £2,200 per m² | Standard finishes |
| Mid-Range Specification | £2,200 – £2,800 per m² | Good quality finishes |
| High Specification New Build | £2,800 – £3,500+ per m² | Premium finishes |
| London Premium (add) | +15% – +25% | On all above figures |
| Typical 3-bed detached (120m²) | £216,000 – £420,000 | Excluding land & fees |
| Typical 4-bed detached (160m²) | £288,000 – £560,000 | Excluding land & fees |
All costs are estimates. Survey and detailed specification required for accurate quotation. Costs include VAT.
"TCM built our self-build home on a garden plot in Hertfordshire. From planning application to handover, they managed everything professionally. The quality of the build is exceptional and we moved in on schedule."
Related Services & Guides
Single and double-storey extensions as an alternative to moving or building new.
Understand Permitted Development rights and when planning permission is required.
15+ years of experience, Checkatrade verified, and fully insured.
New Build FAQs
Ready to Build Your New Home?
Contact us for a free feasibility consultation. We will assess your plot, advise on planning potential, and provide an indicative build cost — completely free of charge.