Question 1

How much does it cost to build a new house in the UK in 2026?

Accepted Answer

The average cost to build a new house in the UK in 2026 ranges from £1,500 to £4,000+ per square metre of gross internal floor area, depending on specification and location. A typical 3-bedroom detached house of around 120m² would cost between £180,000 and £480,000 to build — excluding land, professional fees, planning, and VAT. London and the South East attract a significant premium of 15–40% above the national average.

Question 2

Is VAT charged on new build construction?

Accepted Answer

New build residential construction is zero-rated for VAT (0%) under HMRC rules — meaning your main contractor should not charge VAT on the build cost. This is a significant saving compared to extensions and renovations, which are charged at 20% VAT. Always confirm the VAT position with your accountant and ensure your contractor is VAT-registered and applying the correct rate.

Question 3

What is not included in a new build cost estimate?

Accepted Answer

Our build cost estimates cover construction costs only. They do not include: land purchase price, Stamp Duty Land Tax, architect and structural engineer fees (typically 8–15% of build cost), planning application fees, building regulations fees, site insurance and structural warranties (NHBC or similar), finance and interest costs, or landscaping and external works beyond the immediate curtilage. We can provide a total project cost breakdown on request.

Question 4

How long does it take to build a new house?

Accepted Answer

Build programmes vary significantly by house type and size. A standard 3-bed detached house typically takes 40–52 weeks from groundworks to practical completion. A pair of semi-detached houses takes 36–52 weeks. Larger schemes (10+ units) typically run 52–104 weeks. These timescales assume planning permission is already granted — the planning process itself typically takes 8–13 weeks for a householder application.

Question 5

Do I need planning permission to build a new house?

Accepted Answer

Yes — all new build residential properties require full planning permission. Unlike extensions, there are no Permitted Development rights for new dwellings. The only exception is agricultural conversions (Class Q permitted development), which allows certain barn conversions without full planning. The planning process typically takes 8–13 weeks for a standard application. Self-builders should register with their local authority's Self-Build Register to access serviced plots.

Question 6

What is the difference between a self-build and a custom build?

Accepted Answer

A self-build is where you manage the entire build process yourself — buying the plot, appointing the architect, and either building it yourself or managing subcontractors directly. A custom build is where a developer provides a serviced plot and a framework for you to customise the design within set parameters. Both qualify for the Self-Build and Custom Housebuilding Act 2015, which gives you rights to access plots and potential exemptions from Community Infrastructure Levy (CIL).

Question 7

What information do you need to produce a new build estimate?

Accepted Answer

We can work from any stage of design. Ideally we need: architect's floor plans and elevations (planning drawings or working drawings), a specification or schedule of finishes, and the site location (for regional pricing). If you only have a concept sketch or a brief, we can produce an early-stage order of cost estimate to help with feasibility. The more detail you provide, the more accurate the estimate.

Question 8

Can you estimate multi-unit residential developments?

Accepted Answer

Yes — we regularly estimate residential developments of all sizes, from a pair of semi-detached houses to 50+ unit apartment schemes. For larger schemes, we can provide estimates broken down by plot type, phase, and specification level. We also provide Bills of Quantities for tender purposes, and can assist with value engineering to bring costs within budget.

Trade Item	Unit	Low	High
Groundworks & foundations (standard)	m²	£80	£180
Groundworks & foundations (piled)	m²	£150	£350
Masonry cavity wall (inc. insulation)	m²	£120	£200
Timber frame structure (supply & erect)	m²	£180	£320
Roof structure & covering (tiles)	m²	£90	£180
Roof structure & covering (slate)	m²	£140	£280
uPVC windows (supply & fit)	per window	£600	£1,200
Aluminium windows (supply & fit)	per window	£1,200	£2,800
External render (monocouche)	m²	£45	£80
First fix M&E (plumbing & electrics)	m²	£80	£160
Insulation & airtightness	m²	£30	£90
Plasterboard & skim	m²	£25	£55
Kitchen (supply & fit)	per unit	£8,000	£35,000+
Bathroom (supply & fit)	per room	£4,500	£18,000
Staircase (timber, straight)	per flight	£2,500	£8,000
External works & landscaping	m²	£40	£150

Region	Multiplier
Inner London	×1.40
Outer London	×1.25
South East	×1.15
South West	×1.05
East of England	×1.10
East Midlands	×0.95
West Midlands	×0.95
Yorkshire	×0.90
North West	×0.92
North East	×0.85
Scotland	×0.90
Wales	×0.88

New Build House
Cost Estimates UK

Every New Build Type Covered

Detached House

Best Suited For

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New Build Projects We've Estimated

Luxury House Stapleford Abbotts

4-Bed Detached, Chelmsford

Semi-Detached Pair, Leeds

Self-Build Eco Home, Dorset

New Build House Costs UK

Indicative Unit Rates

Regional Cost Multipliers

Not Included in Build Cost

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