New build builders London homeowners can hold to a price. Since 2010 we've built 150+ custom homes across West London for homeowners with their own plot, as bespoke house builders and new build contractors working on teardown rebuilds, self build commissions and plot and build packages. Every project starts with a free feasibility visit and a fixed price design and build contract. One company from planning to keys, with a 10 year structural warranty arranged on every build, fully insured.
Three reasons. First, the homeowner hires an architect, structural engineer and builder separately. Each blames the others when costs creep. Second, the contract is "cost plus" instead of fixed-price, so every variation becomes an extra. Third, planning conditions are missed during design, triggering expensive redesigns mid-build. We have been called in to take over part built projects that went exactly this way.
At Signature Build Properties, we run new build builders London projects on a single design-and-build contract. Our architectural design team produces the drawings, our structural engineer signs them off, our project manager runs the build, and every cost is locked in writing before groundworks start. One contract, one price, one team accountable from the planning submission through to the day you collect the keys.
Based in Hayes, we work as house builders London wide on the full West London mix: Victorian teardown rebuilds, 1930s replacement dwellings, self build commissions on inherited plots and luxury new build family homes across Ealing, Richmond and the Surrey commuter belt. Once the shell is up, the same team carries the project through the interior design and fit out, the kitchen and the bathrooms, so the house is finished by the people who built it. View recent new build projects.
Our fixed price promise: the contract price is the completion price. Variations happen only when you choose to change the scope, payments are staged against building control milestones, and every line of the build, from groundworks to the final coat of paint, is itemised in writing before we start. No cost plus pricing, no retrospective extras, no surprises at handover.
The four tiers below cover how most homeowners and developers engage new build builders in London. From a turnkey design and build on your existing plot through to project management on architect led schemes. Pick the level of involvement that matches your project. Need a rough cost first? Try our construction cost calculators.
Our most-booked tier. Architectural design, structural engineering and the build team under one fixed price contract. Best for clients with a plot who want a single contract through to handover. A 10 year structural warranty is arranged for the build, with building control sign off and all certificates on completion.
Demolition of an existing house plus a full replacement dwelling on the same plot. Common in West London where 1950s bungalows or undersized terraces are replaced with larger contemporary family homes. We handle demolition consent, party wall, and the full rebuild on a single contract.
You've already engaged an architect or have planning permission in place. We step in as new build contractors London, manage all trades and the build programme. Fee-based or fixed-price contract for the construction works only. Common on inherited plot self-builds and architect-led schemes.
Top-of-market West London custom new build. Bespoke kitchens from Smallbone or Roundhouse, full smart-home integration, swimming pools or basements, landscaped grounds. Common in Richmond, Chiswick and the Surrey commuter belt. Project teams scaled for the spec level.
We work out of Hayes and build new homes across nine sub regions, see the full list on our areas we cover page. Each borough has its own planning rhythm and property mix, and our local pages for Ealing, Hounslow, Hayes and Richmond cover the local work in more depth. Knowing the local planning context, surveyors and material suppliers makes a real difference to project timelines and cost.
Teardown rebuild heartland. Larger Victorian and Edwardian plots get replaced with contemporary family homes. Many in conservation area zones, so we handle planning carefully, usually 12 to 16 weeks for approval, then 12 to 18 months to build.
Premium budgets. Bespoke design-and-build commissions running £800k to £1.5m+ build cost. Strong demand for basement conversions plus new build above. Plot constraints often require party wall agreements on both sides.
Our home territory. Plot prices lower, build budgets more accessible. Common path: clients buy a small 1930s house, demolish and rebuild a 4-bed family home. Permitted development rules cover much of the work, which speeds things up significantly.
Mixed stock. We see a steady flow of inherited plots being self-built on. Hounslow council is reasonable on planning, decision times usually 10 to 12 weeks for householder applications. Family-scale new builds dominate here.
Conservation control is tight. Listed buildings common. Planning takes longer here, often 14 to 18 weeks plus pre-application advice essential. Premium spec dominates: bespoke kitchens, oak joinery, lime-friendly materials on period-area schemes.
Bigger Edwardian plots replaced with substantial contemporary homes. Multi-million-pound budgets common. Often combined with deep basements (cinema rooms, gym, pool). Building control rigorous, structural engineering complex.
Family suburban new build market. 1930s and 1950s semis frequently torn down and rebuilt as larger detached family homes. Kingston council is fast on planning, decision often inside 10 weeks. Mid-spec builds dominant.
Mixed inter war stock. Many plots here are inherited and rebuilt as larger homes designed for extended, multi generation family living. We design for the layouts this needs, including separate entrances, annexe style ground floors and additional kitchens where the plot supports them.
Large detached homes on bigger plots. Some sit in green belt or near Thames floodplain, so planning constraints checked upfront. Luxury new build is the norm: 5-bed plus, double garages, gated entries, landscaped grounds.
National developers such as Barratt, Taylor Wimpey and Bellway sell ready built homes from their standard house type ranges. They acquire the land, decide the layouts and sell the finished homes at completion. You are a buyer in their process, with little or no input into the design, the materials or the layout.
Hiring new build builders London on a custom commission flips the model. You own the plot. You commission the design. You choose every specification. We build it for you on a fixed-price contract. The result is a home tailored to your family, your land and your taste. The 10 year structural warranty works the same way as the one national developers provide, but the home reflects exactly what you wanted built, not a developer template.
The matrix below maps the most common West London new build scenarios to the right service tier and likely budget. Every project still needs a feasibility visit before the design phase starts.
| Your Situation | Best Service Tier | Typical Budget | Timeline |
|---|---|---|---|
| Inherited or purchased empty plot | Custom Design & Build | £380,000 to £600,000 | 12 to 18 months |
| 1930s bungalow or undersized house | Teardown & Rebuild | £450,000 to £750,000 | 14 to 20 months |
| Garden plot subdivision | Custom Design & Build (compact) | £280,000 to £450,000 | 10 to 14 months |
| Architect's drawings already done | Self-Build Project Management | Build cost + 10 to 15% | 10 to 14 months |
| Period plot, conservation area | Custom + planning specialist | £500,000 to £900,000 | 14 to 20 months |
| High-end West London / Surrey plot | Luxury New Build | £800,000 to £1,500,000+ | 16 to 24 months |
Every figure below is build cost only, excluding land. These come from new build builders London projects we've delivered across West London in the past 18 months. Every contract is fixed in writing before groundworks start.
The cost of building a house in London runs £2,800 to £4,500 per square metre depending on specification, which is the same self build cost per m2 most London cost guides quote for standard through to high spec work. A 2 bed new build is £280,000 to £450,000 in build cost. A 3 bed custom home runs £380,000 to £620,000. A 4 bed luxury new build sits at £550,000 to £1,000,000+. Teardown costs add £25,000 to £80,000 depending on the existing structure. Planning and design fees run 8% to 12% of build cost. We fix every line in writing.
| Project Type | Build Cost (ex land) | Duration | Best For |
|---|---|---|---|
| Free Plot Feasibility Visit | Free | 1 to 2 hours | All new build enquiries |
| Compact 2-bed new build (≤100m²) | £280,000 to £450,000 | 10 to 14 months | Subdivided plot or garden build |
| Standard 3-bed family home (120 to 150m²) | £380,000 to £620,000 | 12 to 18 months | Custom Design & Build |
| 4-bed family home (150 to 220m²) | £480,000 to £820,000 | 14 to 20 months | Larger plots, growing families |
| Luxury 4-5 bed (220m²+, premium spec) | £800,000 to £1,500,000+ | 16 to 24 months | High-end West London / Surrey |
| Teardown of existing structure | +£25,000 to £80,000 | 3 to 6 weeks | Replacement dwelling |
| Design + Planning Package only | £18,000 to £45,000 | 3 to 6 months | Planning consent route |
| Project Management only | 10 to 15% of build cost | Full build duration | Architect already engaged |
All prices exclude land cost and statutory fees, and are indicative for London in 2026. One advantage of building new: HMRC confirms that all labour on a qualifying new build can be zero rated for VAT, a saving renovation projects do not get. For independent guidance on the self build route see the Self Build Portal, run by the National Custom and Self Build Association. You can also size a first budget with our construction cost calculators.
Every new build builders London project we run follows the same six step process. Free feasibility, planning, fixed price contract, build, snagging, handover. One team accountable from start to finish, the same way we run a house extension or a full home renovation.
Our project manager visits your plot, checks access, ground conditions, planning constraints, party wall implications and structural feasibility. You receive a written feasibility report the same week including rough build budget and likely planning route. No commitment.
Our architectural design team produces concept drawings to your brief. Once you sign off the design, we submit the planning application and manage the council process. Pre-application advice is used where conservation or listed status applies. Decision in 8 to 16 weeks.
Once planning is approved, structural drawings completed and spec finalised, you receive a fixed-price design-and-build contract covering every cost. Groundworks, structure, services, finishes, joinery, all certifications. No "labour and materials" pricing.
Site clearance, demolition if required, foundations, drainage, structural frame. Brickwork, blockwork, steelwork, roof structure. Weather-tight shell reached typically within 4 to 6 months on a standard 3-bed project. Building control inspector signs off each stage.
First fix electrics, plumbing, heating. Then plasterboard, dry lining, screed floors. Second fix follows: kitchens, bathrooms, sanitaryware, lighting, sockets, doors, joinery, tiling, decoration. All in-house trades sequenced by the project manager.
Snagging inspection room by room, with you present. All snags fixed inside 10 working days. Building control completion certificate issued. The 10 year structural warranty, NICEIC electrical, Gas Safe and FENSA certificates are all handed over. Keys yours on completion date.
A custom new build typically delivers 15% to 30% more home for the same budget compared with buying a developer's pattern-book equivalent. For West London homeowners with a plot, building beats buying every time on value per square metre.
Ealing W5, Acton W3 and Chiswick W4 are West London's busiest teardown-and-rebuild market. Generous Victorian and Edwardian plots, strong family demand, and a steady flow of older properties being replaced with contemporary homes.
Ealing and Acton sit on a mix of Victorian terraces, Edwardian semis and 1930s detached homes. Many of the larger plots have undersized or dated dwellings on them, making teardown-and-rebuild commercially logical. The borough's planning team is reasonable on contemporary replacement designs provided the streetscape character is respected. Conservation area zones require sympathetic design and slower planning, typically 12 to 16 weeks.
Most jobs here are custom design-and-build packages running £450,000 to £750,000 in build cost. We handle planning, party wall agreements, demolition, structural design and the full build under one fixed contract. We build across the W3, W4, W5, W7 and W13 postcodes, so the local planning process and conservation constraints are familiar ground for our team.
For a custom new build in Ealing W5, Acton W3, Chiswick W4 or Hanwell W7, call us on +44 7404 931629 for a free plot feasibility visit and detailed quote.
| Project Scope | Ealing/Acton 2026 Build Cost |
|---|---|
| Free plot feasibility | Free |
| Garden subdivision (compact 2-bed) | £320,000 to £480,000 |
| 3-bed contemporary new build | £420,000 to £640,000 |
| Teardown + 4-bed replacement | £550,000 to £820,000 |
| Conservation area period-style new build | £600,000 to £950,000 |
| Luxury 5-bed family home | £850,000 to £1,400,000+ |
| Basement excavation (added scope) | +£200,000 to £450,000 |
A new build is the biggest single contract most people ever sign. Watch for these six warning signs before committing. A serious new build contractor will pass all six without flinching.
Architect, structural engineer and builder on three separate contracts means three people pointing at each other when costs creep. Insist on a single design-and-build contract with one party accountable for the result. We do this on every project.
A new build quoted on labour rates plus materials grows by 20% to 40% over the project. Every variation is an extra invoice. A proper fixed-price contract caps your exposure. The only variations should be ones you actively choose mid-build.
Every new build needs a 10 year structural warranty for the home to be readily saleable and mortgageable. NHBC, LABC Warranty and Premier Guarantee are the recognised providers. If your builder cannot arrange one, walk away. We arrange the warranty at planning stage on every project.
Anything above 15 to 20% before groundworks start is a cash-flow problem on their end. Legitimate new build builders stage payments against milestones: foundations, weather-tight shell, first fix, second fix, completion. Each release is conditional on building control sign-off.
Serious contractors carry substantial public liability cover, employer's liability cover and contractor's all risks insurance covering the build. Ask to see active certificates before signing anything. A builder who fumbles this question has not been doing it long enough or properly. Ask us and we will show you ours.
A genuine West London new build contractor has multiple completed homes locally. Ask for three addresses you can drive past, plus two recent clients you can phone. If they dodge with "private client confidentiality" excuses, find out why before you commit any money.
The three worked examples below show how the numbers, timelines and scope typically stack up for the most common West London new build scenarios: a teardown rebuild, a garden plot self build and a 1950s bungalow replacement. They are illustrations of typical projects at 2026 prices, not client case studies, and every real project starts with a free feasibility visit and its own written fixed price.
A typical Ealing scenario: a tired 3 bed Victorian end of terrace on a generous plot, with planning approved for full demolition and a contemporary 4 bed replacement dwelling. A scheme like this usually includes a double height entrance, an open plan kitchen family room, a master suite, an air source heat pump, MVHR ventilation and an electric vehicle charger, and it is priced as one fixed contract before groundworks start.
The classic garden plot route: a rear garden subdivided from a family property, planning permission already obtained through the owner's own architect, and a builder needed for the construction phase. On a project like this we run the full build on a fixed price contract, typically to a low energy specification with engineered flooring, a bespoke kitchen and an en suite master, with a 10 year structural warranty arranged for the new dwelling.
Common in our home patch of Hayes and Hillingdon: a dated 1950s bungalow bought specifically to demolish and replace with a larger family home. A typical scheme covers demolition, groundworks and a 3 bed contemporary house with an open plan ground floor and three bedrooms upstairs, all under one fixed price contract with a defined completion date. Replacement dwellings like this are the most affordable route into a custom new build.
Our project manager visits your plot, runs a feasibility check, discusses your vision, then provides a written report and rough budget band the same week. No commitment, no pressure. Just the information you need to plan the next step.
Contact us today to discuss your project and receive a no-obligation quote.
