New Build Homes in London: Complete Guide to Costs, Process and Choosing a Builder

Building a new home in London is a major undertaking that requires careful planning, an experienced builder and a thorough understanding of the costs and process involved. Whether you are building on a plot you have purchased, replacing an existing property, or developing a site, this guide covers everything you need to know about new build construction in London in 2026. LCCL Construction offers complete new build design and build services across London and Hertfordshire.

New Build Homes in London: Complete Guide to Costs, Process and Choosing a Builder

How Much Does It Cost to Build a New Home in London?

The cost of building a new home in London varies enormously depending on size, specification and location. As a rough guide, construction costs in London range from £2,000 (zero-rated for VAT) to £3,500 per square metre for a standard specification build, £3,600 – £5,400 per square metre inc. VAT (£3,000 – £4,500 + VAT) for a high specification build, and £4,500 – £6,000 (zero-rated for VAT) or more per square metre for a premium or luxury specification. A typical 150 square metre 4-bedroom house would cost approximately £300,000 – £525,000 (zero-rated for VAT) for construction at mid to high specification, plus land costs, professional fees, planning and building regulations fees, and VAT if applicable. New build homes built from scratch are VAT exempt on construction costs, which is a significant saving compared to renovation projects charged at the standard VAT rate.

The New Build Process Step by Step

The new build process starts with site acquisition and feasibility assessment, confirming what can be built on the plot within planning constraints. Next comes architectural design, which for a new build is more extensive than an extension project, covering the entire building layout, elevations, materials, landscaping and services. A full planning application is submitted to the local authority. Building regulations drawings and structural engineering calculations are prepared in detail. Once all approvals are in place, the construction phase covers foundations and substructure, superstructure including walls, floors and roof, first fix electrics and plumbing, insulation and airtightness, second fix services, plastering, kitchen and bathroom fitting, decoration, and external landscaping. The entire process from design to completion typically takes 12 to 24 months.

Planning Permission for New Builds

New build homes always require full planning permission. The application process involves detailed architectural drawings, a design and access statement, site plans, drainage plans, ecological surveys if required, and sometimes heritage or flood risk assessments. Planning permission for new builds typically takes 8 to 13 weeks for a decision but can take longer for complex or sensitive sites. Pre-application advice from the local planning authority is recommended for new build projects, as it provides early feedback on the likelihood of approval and any design changes needed. LCCL Construction manages the entire planning process for our new build clients.

Choosing a Builder for a New Build

Choosing the right builder for a new build is even more critical than for an extension or renovation because the entire structure is built from scratch. Look for a company with specific new build experience, not just renovation and extension experience. Check their portfolio for completed new build projects. Verify they have the capacity and team to manage a project lasting 6 to 12 months of construction. Ensure they offer a comprehensive warranty such as the LABC 10-year warranty. Confirm they provide a full design and build service covering everything from architecture through to completion. And check their financial stability, as new build projects involve larger sums over longer periods.

Build Your New Home with LCCL Construction

LCCL Construction offers complete new build design and build services across London and Hertfordshire. Our service covers site assessment, architectural design, planning permission, building regulations, structural engineering, all construction work, project management, mechanical and electrical services, and finishing. New build construction is VAT exempt, which represents significant savings. We have over 20 years of experience, more than 200 reviews rated 4.7 out of 5, and are LABC Registered Partners offering 10-year warranties. Call 020 8037 7332, email info@lcclconstruction.co.uk, or book a free consultation at lcclconstruction.co.uk/booking-calendar/free-consultation-call.