New Build House Costs in Cambridge and Cambridgeshire

Building a new house in Cambridgeshire generally runs at £2,200 to £3,200 per square metre of finished floor area for the construction itself, before the plot, the professional fees and the statutory costs.

This guide sets out the published 2026 benchmarks, the VAT position that makes a new build behave differently from every other kind of building work, the ground and plot variables that move a budget most, and the local planning picture in Greater Cambridge. It is general budgeting information rather than a quotation.

New build costs at a glance

Two things make these numbers behave differently from an extension budget.

The first is VAT. A new dwelling is zero-rated, so there is no 20% to add. That is the single largest structural difference between a new build budget and every other budget on this site, and it is covered in full below.

The second is that the plot is not in the figure. Land is usually the largest line in a self-build and it varies far more than the building does.

Ranges are compiled from Homebuilding & Renovating (updated August 2026), which puts general build costs at £2,500 to £3,000 per m² with budget builds from £2,200 and high specification above £3,200, and MyBuilder (updated August 2026), which puts the 2026 UK average at £1,600 to £2,800 per m². Homebuilding also indexes the South East at 104% of the UK baseline.

Why the published figures disagree

MyBuilder’s lower band and Homebuilding’s upper band barely overlap, which is worth explaining rather than averaging away.

The low end of any national figure describes a simple rectangular house, standard specification, straightforward ground, built somewhere with lower labour rates. The high end describes a more complex form, better glazing and finishes, higher fabric performance, and a location with tighter labour supply. MyBuilder’s own worked table implies about £2,600 per m² for a 155m² detached house — comfortably inside Homebuilding’s band — which suggests its headline low figure describes the simplest possible build rather than a typical one.

For Cambridgeshire we have used £2,200 to £3,200. If you want a single number to start a conversation with, £2,600 per m² is a reasonable middle.

What a price per square metre includes

A construction rate should cover the building itself:

• site set-up, access, welfare, scaffolding, skips and waste
• ground works, foundations and drainage below the building
• superstructure — frame or masonry, floors, roof structure and covering
• external envelope: brickwork or render, insulation, windows and external doors
• internal walls, staircase, plastering and joinery
• electrics, plumbing, heating and ventilation
• kitchen and sanitaryware allowances, decoration and floor finishes

It does not normally cover the plot, professional fees, statutory fees, connections to services, landscaping and driveways, or anything you supply direct. Those are set out below, and they are the reason a build that “came in at £2,600 a metre” can still have cost noticeably more.

The VAT difference: new houses are zero-rated

This is the part worth reading twice.

Work on an existing home — an extension, a loft, a refurbishment — is standard-rated at 20%. The construction of a new dwelling is zero-rated. A VAT-registered contractor building a qualifying new house charges no VAT on the construction work or on the building materials incorporated into it.

To qualify, the building has to be genuinely new: built from scratch, with any previous structure demolished to ground level (cellars and slabs may remain), designed as a dwelling, and built under a single project with planning consent.

Some things stay standard-rated even on a new build:

• professional fees — architect, structural engineer, surveyor and project management are always standard-rated
• plant and equipment hired separately rather than supplied with the work
• fitted carpets, most free-standing white goods and some fitted appliances
• detached garages, outbuildings and pools built as separate structures

If you are managing the build yourself rather than employing a main contractor, the DIY Housebuilder Scheme lets you reclaim most of the VAT you have been charged on materials and on any standard-rated services, in a single claim after completion. Keep every invoice — the claim is evidence-based and there is no second chance at it.

On a £300,000 build, zero-rating is roughly £60,000 that never enters the budget. It is the reason a new house per square metre sits closer to an extension per square metre than most people expect.

The plot and the ground

Two variables sit outside the building and can move a new build budget more than any specification choice.

The plot. Land with outline consent, a serviced access and no unusual constraints prices very differently from a garden plot behind an existing house with a shared drive. Nothing in this guide includes the plot.

The ground. Much of this area sits on clay, and clay shrinks and swells with moisture. Where there are trees nearby — present, recently removed, or planned — foundation depths increase, sometimes substantially, and piled or reinforced solutions become the sensible answer. Parts of Fenland and the river valleys bring their own drainage and flood considerations.

A site investigation before you fix a budget is not an optional refinement. Foundations are the one element you cannot value-engineer later, and an unexpected foundation design is the most common reason a new build budget moves in the first month.

Planning, fees and the Greater Cambridge picture

The application fee for a full application to build a single new house is £610 per dwelling under the fee schedule effective 1 April 2026. Fees are indexed annually each April.

Water efficiency is a live local issue. Greater Cambridge is one of the driest parts of the UK, and the Environment Agency classifies the supply zone as facing serious water stress. The draft Greater Cambridge Local Plan proposes that new homes on schemes of fewer than 100 dwellings achieve 90 to 100 litres per person per day, against the national optional standard of 110. The policy is still in draft, but the direction is settled, and in practice it means specifying fittings, and sometimes rainwater or greywater systems, at design stage rather than at first fix.

The Community Infrastructure Levy is coming but is not yet in force. Cambridge City and South Cambridgeshire consulted on a draft CIL charging schedule between February and March 2026, and it has now gone forward for examination. CIL is charged per square metre of new floorspace, so once adopted it will be a real line in a new build budget in a way it is not today. If you are planning a build that will be submitted in the next year or two, ask your planning consultant where the schedule has got to. Section 106 obligations can also apply on some sites.

Building control is charged separately by the local authority or an approved inspector, and on a new dwelling the inspection regime is more involved than on an extension. Our planning permission guide explains how applications are handled locally.

Warranty, and why lenders care

A new house normally needs a 10-year structural warranty. It is not a legal requirement in itself, but most mortgage lenders will not lend on a new home without one, and neither will a buyer’s lender if you sell within the ten years. Arrange it before work starts — a warranty provider needs to inspect during construction, and a warranty cannot be added retrospectively to a finished building.

If you are self-managing, you will also want site insurance covering the works, materials and public liability, which is a different product from the warranty.

Costs to allow for outside the builder’s price

• The plot
• Professional fees — commonly 5% to 15% of the build cost across architect, engineer and any project management
• Site investigation and survey — topographical and geotechnical
• Planning application — £610 per dwelling, plus consultant fees if you use one
• Building control — local authority or approved inspector
• Structural warranty and site insurance
• Utility connections — water, electricity, gas, telecoms and foul drainage; connections to a plot with no existing services are frequently underestimated
• Demolition and site clearance where something is already there
• Landscaping, driveway and boundaries — usually excluded from the construction rate
• Contingency — 10% to 15%, and toward the top of that on a plot you have not built on before

How to get a useful new build quotation

The specification is doing most of the work in the price, so the useful question is not “how much” but “for what”.

Ask for the fabric performance you are being priced for, the heating and ventilation strategy, the window specification, and where the kitchen, sanitaryware and floor-finish allowances have been set. Ask what happens if the ground investigation changes the foundation design, because that is the variation most likely to arrive.

Then the standard checks: written scope, named exclusions, the VAT treatment in writing, the programme, stage payments, how variations are priced, and the warranty provider. Our guide on what a builder’s quotation should include covers the full list.

A new build in progress

We are currently on site at a new house at Harston, south of Cambridge — a ground-up build with a timber frame on a concrete slab and a brick outer leaf, roofed in early August 2026 and now at internal first fix. It is the kind of project this guide describes, and we are happy to talk through how it has been run at the point you are ready to plan yours.

Our new build service page sets out how we scope, price and run this type of work.

New build cost questions

How much does it cost to build a house in Cambridgeshire?

Around £2,200 to £3,200 per square metre for the construction, so roughly £264,000 to £384,000 for a 120m² three-bedroom house, before the plot, professional fees and statutory costs. A new dwelling is zero-rated for VAT, so there is no 20% to add.

Is there VAT on building a new house?

No, not on the construction. A qualifying new dwelling is zero-rated, so a VAT-registered contractor charges no VAT on the building work or the materials built into it. Professional fees, separately hired plant and some fitted goods remain standard-rated. Self-managed builds can reclaim most of the rest through the DIY Housebuilder Scheme.

Is it cheaper to build than to buy?

Sometimes, and the honest answer is that it depends almost entirely on what you pay for the plot. The construction cost is the more predictable half of the equation.

How long does it take to build a house?

It depends on size, construction method and ground conditions, and design and approvals add a period before anyone is on site. We give you a programme with your quotation rather than a general figure.

What is the biggest risk to a new build budget?

Ground conditions. Foundations are designed once the site investigation is in, and on shrinkable clay near trees the design can change substantially. That is why we recommend investigating before fixing a budget rather than after.

Will I need a warranty?

In practice, yes. Most lenders require a 10-year structural warranty on a new home, both for your own mortgage and for a buyer’s within the first ten years. It must be arranged before construction starts.

How this guide was prepared

Build cost ranges are taken from Homebuilding & Renovating and MyBuilder, both updated August 2026, and are quoted as published rather than adjusted; where they disagree, the disagreement is explained rather than averaged. VAT treatment is from HMRC’s VAT Notice 708. Planning application fees are from the Planning Portal fee schedule effective 1 April 2026. The water efficiency standard and the CIL position are from Greater Cambridge Shared Planning’s own consultation material, and both are draft at the time of writing. Worked figures are transparent multiplication of a published benchmark and are a starting point for a conversation, not a quotation.

Get a clear next step for your new build

Tell us what you want to achieve, and send whatever you already have. Photos and drawings help, but they are not essential to start — plenty of projects begin with a description and a site visit. We aim to respond to every enquiry within one working day with the most useful next step. Request a Quote.

More on planning, costs and contracts in our building guides. Some homeowners spread the cost — our building project finance page explains the options and who provides them.

Last reviewed: 31 August 2026. This guide applies to England. Costs, planning rules, fees, levies and building regulations change; check current official guidance and obtain appropriate professional advice for your property and project.