New Build Cost in London 2026: What to Budget Per m²

A new build is the most complex residential project — but it’s also the cleanest slate. You get exactly what you design, built to current Building Regulations, with zero-rated VAT and (if done through a design-and-build route) strong cost certainty.

This guide covers what new builds actually cost in London in 2026.

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New Build Cost per m² (London 2026)

| Specification Tier | Cost per m² (GIA) | 150m² home | |---|---|---| | Standard | £1,800 – £2,200 | £270,000 – £330,000 | | Balanced | £2,300 – £2,700 | £345,000 – £405,000 | | Premium | £2,800 – £3,200 | £420,000 – £480,000 | | Bespoke/Architect | £3,200 – £4,500+ | £480,000 – £675,000+ |

Prices are construction cost only — they exclude land, professional fees, planning application costs, and service connection charges (typically £15,000–£35,000 in London for new connections to gas, electricity, water and drainage).

VAT: New residential builds are zero-rated. No VAT on qualifying construction works.

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What’s Included in 2VP’s New Build Contract

A 2VP new build fixed-price contract includes:

Substructure

• Site clearance and excavation
• Foundations (strip, raft or piled — depending on ground investigation)
• Ground floor construction (beam-and-block or concrete slab)
• Drainage below ground

Superstructure

• Structural frame (timber frame, masonry or SIPs — as designed)
• External walls, insulation, cladding or masonry outer leaf
• Internal load-bearing walls and partitions
• Roof structure, insulation, tiles or flat membrane

Services

• Mechanical: heating system, underfloor heating (ground floor), hot water
• Electrical: full first and second fix, consumer unit, smart home pre-wiring if specified
• Plumbing: all supply and waste to bathrooms, kitchen, utility

Fit-out

• Internal walls: plasterboard, skim, decoration
• Floors: as specified (screed, timber, stone)
• Kitchens and bathrooms: as specified
• Internal joinery: doors, architraves, skirting, built-in wardrobes

External works

• Damp proof course and tanking
• External doors and windows (aluminium or timber as specified)
• External painting and render where applicable

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Planning Permission for New Builds

Every new build requires Full Planning Permission — there are no Permitted Development Rights for new residential construction.

Key planning considerations for London new builds:

• Design quality: London councils expect high-quality design with contextual materials. Poorly designed applications are routinely refused.
• Heritage and conservation: If the site is in a conservation area or adjacent to a listed building, the heritage impact will be a key material consideration.
• Flood risk: Many London sites — particularly in SW and SE London — require a Flood Risk Assessment.
• Ecology: Even small sites may require a bat and bird survey if the application affects mature trees or existing buildings.

2VP works with our design partner Nicholas Elias Architects (RIBA Silver Medal) on all new builds, ensuring the architectural quality of planning submissions is high and the relationship with planning officers professional.

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New Build vs. Renovation: When Does New Build Make Sense?

Choose new build when:

• The existing structure is beyond economic repair
• You want to maximise the site’s planning potential (e.g. replace a single-storey outbuilding with a two-storey house)
• You want full passive house or Passivhaus-standard energy performance
• The existing layout can’t be reconfigured to meet your needs
• You want the zero-VAT benefit on a large project

Choose renovation when:

• The existing structure is sound
• You want to retain original period features
• The works can be done under Permitted Development (faster, lower fees)
• You can’t tolerate an 18+ month programme

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Why Zero-Rated VAT Matters

On a £400,000 new build construction cost, the VAT saving is £80,000 compared to renovation work at 20% VAT. This is a substantial factor in the economics of rebuilding vs. renovating, particularly for large or premium projects.

The zero-rating applies to the construction of a new dwelling where no dwelling previously existed (or where the existing dwelling is demolished). It does not apply to extensions or renovations of existing dwellings.

Your contractor must issue a zero-rated VAT invoice — verify this before signing any contract.

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Professional Fees to Budget

| Professional | Typical Fee (% of construction) | |---|---| | Architect (design to completion) | 8–12% | | Structural engineer | 2–3% | | Mechanical & electrical consultant | 1–2% | | Planning consultant | 1–2% (if needed) | | Quantity surveyor / cost consultant | 1–2% | | Party wall surveyor | Fixed per neighbour: £800–£2,500 | | Building control (independent approved inspector) | 0.5–1% | | Total professional fees | ~15–20% |

2VP’s design-and-build route consolidates architecture and construction under a single contract. This removes the coordination risk between architect and contractor and typically reduces total fees below the separate-appointments route.

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Get a New Build Estimate

Use our calculator for an instant new build cost estimate based on your site and specification.

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Or contact us to arrange a site visit and discuss your project with Vladimir directly.