New Build Construction London 2026: Costs, Planning and Timelines

New build construction in London is one of the most complex and rewarding residential projects a homeowner or developer can undertake. Whether you are building a single new dwelling on a plot of land, replacing an existing property, or developing a small residential scheme, the quality of your design and build team is the single most important factor in determining the success of the project. LCCL Construction delivers new build construction projects across London and Hertfordshire as part of our complete design and build service.

LCCL Construction — specialist new build construction in London and Hertfordshire

How Much Does New Build Construction Cost in London in 2026?

New build construction costs in London range from £1,800 (zero-rated for VAT) to £3,500 per square metre depending on specification, location, ground conditions and complexity. A typical new build house of 150 square metres in London costs between £270,000 and £525,000 for construction alone, excluding land, professional fees, planning permission and VAT. New builds are subject to zero-rated VAT in most cases, making them more cost-effective than extensions and renovations from a tax perspective. Land costs in London vary enormously by location and are separate from construction costs.

New Build Construction London: Planning Permission and Building Regulations

All new build construction projects in London require full planning permission from the local planning authority. The planning process for a new build typically takes 8 to 13 weeks from submission for a standard application. Complex sites, conservation areas, listed building contexts and Green Belt land require more detailed planning submissions and longer timescales. Building regulations approval is also required for all new build construction, covering structural integrity, energy efficiency, fire safety, ventilation and accessibility. LCCL Construction handles all planning permission and building regulations applications as part of our complete design and build service.

How Long Does New Build Construction Take in London?

A typical new build house in London takes 12 to 18 months on site from groundworks to completion. The full project timeline from initial design through planning permission, building regulations, construction and finishing is typically 18 to 30 months. Larger or more complex projects take longer. The key stages are: site investigation and survey, architectural design and planning application, building regulations application, demolition if required, groundworks and foundations, superstructure, roof, weathertight shell, first fix mechanical and electrical, insulation, second fix, finishing and landscaping.

Types of New Build Construction Projects We Deliver

LCCL Construction delivers the following types of new build construction projects across London and Hertfordshire: single new dwelling houses on infill plots, replacement dwellings replacing existing properties, garden plot developments, coach house and outbuilding conversions to residential use, small residential developments of 2 to 5 units, and new build extensions to existing properties creating self-contained living accommodation.

Why Choose LCCL Construction for New Build Construction in London?

LCCL Construction provides a complete design and build service for new build construction covering architectural design, planning permission, building regulations, structural calculations, project management and construction. Over 20 years experience, 200+ verified reviews at 4.7/5, LABC Award Winners 2024, LABC Registered Partners and members of the National Federation of Builders. One company, one estimate, one point of contact from initial design through to completion.

Frequently Asked Questions About New Build Construction in London

How much does it cost to build a new house in London?

Construction costs range from £1,800 (zero-rated for VAT) to £3,500 per square metre excluding land, professional fees and VAT. A typical 150 square metre new build costs £270,000 to £525,000 to construct.

Do I need planning permission for a new build in London?

Yes — all new build construction requires full planning permission from the local planning authority. LCCL Construction handles all planning applications as part of our design and build service.

How long does a new build take in London?

A typical new build house takes 12 to 18 months on site. The full project timeline from initial design to completion is typically 18 to 30 months.

To discuss your new build construction project call LCCL Construction on 020 8037 7332 or get an instant quote online.