How Much Does a New Build House Cost in London in 2026?
- LCCL Construction
- Jun 4
- 3 min read
Building a new house in London is one of the most significant and rewarding projects a homeowner or developer can undertake. Understanding the true cost of new build construction — including all professional fees, planning costs, construction costs and VAT treatment — is essential before committing to a project. LCCL Construction delivers new build houses across London, Hertfordshire and Bedfordshire as part of our complete design and build service and has a clear view of new build costs across our coverage area.
New Build House Cost Per Square Metre in London in 2026
New build construction costs in London range from £1,800 to £3,500 per square metre of gross internal area depending on specification, location, ground conditions and complexity. A standard specification new build in outer London or Hertfordshire typically costs £1,800 to £2,400 per square metre. A medium specification new build in inner or North London costs £2,200 to £2,800 per square metre. A high specification new build in premium London locations costs £2,600 to £3,500 per square metre.
Total New Build Cost Examples in London in 2026
3-bedroom new build house, 120m², standard specification, outer London or Hertfordshire: £216,000 to £288,000.
4-bedroom new build house, 160m², medium specification, North London: £352,000 to £448,000.
5-bedroom new build house, 220m², high specification, premium London location: £572,000 to £770,000.
All construction costs exclude land, professional fees and VAT — see below for full cost breakdown.
What Is Included in New Build Construction Costs?
LCCL Construction's new build service includes: site investigation and surveys, demolition if required, groundworks and foundations, superstructure — walls, floors and roof, external works including windows and doors, first fix mechanical and electrical, insulation to current building regulations standards, internal plastering, second fix mechanical and electrical, kitchen and bathroom installation, flooring, decoration and landscaping. Architectural design, planning permission, building regulations, structural calculations and project management are included as part of our complete design and build service.
VAT on New Build Houses — A Major Cost Saving
New build residential properties are zero-rated for VAT purposes — meaning no VAT is charged on the construction of a new dwelling. This is a significant advantage over extensions and renovations which are subject to VAT at 20 per cent. For a £400,000 new build construction project the VAT saving compared with an equivalent renovation is £80,000. This makes new build construction considerably more cost-effective than it may initially appear when compared with renovation costs.
What Additional Costs Should I Budget For?
In addition to construction costs, budget for: land purchase including stamp duty and legal fees, site investigation including soil survey, topographical survey and drainage survey (£3,000 to £8,000), statutory undertaker connections for water, gas, electricity and drainage (£5,000 to £20,000), building regulations fees, planning application fees (£528 for a standard householder application, more for larger projects), community infrastructure levy where applicable, party wall agreements if building close to boundaries, and a contingency of 10 to 15 per cent of the total construction budget.
Frequently Asked Questions About New Build Costs in London
How much does it cost to build a 4-bedroom house in London?
A 4-bedroom house of approximately 160 square metres typically costs £352,000 to £448,000 to construct in London in 2026 at medium specification, excluding land, professional fees and VAT.
Is VAT charged on new build construction?
No — new build residential construction is zero-rated for VAT. This is a significant saving compared with extensions and renovations which are subject to 20 per cent VAT.
Does LCCL Construction build new homes across London and Hertfordshire?
Yes — LCCL Construction delivers new build houses across London, Hertfordshire and Bedfordshire. See our new build construction service page for more information.
To discuss your new build project call LCCL Construction on 020 8037 7332 or get an instant quote online.
