Can you take an architect's drawings and price a fixed contract?

Yes. Provide us the architect's tender package (drawings, specification, schedule of works) and we return a fixed-price contract with a full programme, milestone payments and any drawing clarifications documented as inclusions or exclusions before signing.

What is a typical W4 side-return kitchen extension cost in 2026?

A high-specification single-storey side-return of around 15–20m² on a Chiswick terrace typically runs £110,000–£175,000 including a bespoke kitchen, structural steel, quality glazing, and a premium finish. We publish a fixed-price contract before you commit.

Will you coordinate with our interior designer?

Absolutely — many of our Chiswick projects run alongside a separate interior designer. We coordinate procurement of designer-specified finishes, sanitaryware and joinery, and we integrate the designer's schedule into our master programme.

How disruptive will the project be? We live nearby.

We manage noise, dust and deliveries as a first priority. Predictable hours, clean-down at the end of every day, dust-sealed working areas, and a project lead you can call. Chiswick clients regularly tell us their neighbours barely noticed the site.

Chiswick residential street — Prime Build Design

Modern Premium Refurbishments & Architect-Led Projects · W4

Builders in
Chiswick.

Chiswick is one of West London's most design-conscious postcodes. Its Edwardian terraces, the Norman Shaw houses of Bedford Park Conservation Area, and the family homes around Grove Park and Chiswick Riverside are almost always improved by owners with a clear architectural point of view. That's why we've built our W4 practice around one thing: reading architects' drawings to the millimetre, then delivering them at a fit and finish that stands up to the design-led families who commission them.

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Section · 01

A W4 practice built for architect-led projects

The typical Chiswick project on our books starts with a designer or architect brief that expects precision: exposed steel columns painted to a specific RAL number, flush skirtings, seamless plaster stops, hidden door frames, precise glazing sightlines. We're set up for exactly this. Our project leads read drawings alongside the architect from day one, our joinery team pre-fabricates bespoke elements off-site, and our MEP coordination is intentionally invisible in the finished home — services concealed, valves accessible, no compromise on the design intent. It's a different mode of building from the standard residential contract, and it's one we take real pride in.

Section · 02

Chiswick landmarks and neighbourhoods we work in

We're often on-site in Bedford Park (the Norman Shaw conservation area), around Turnham Green, Chiswick High Road, along Grove Park and by Chiswick Riverside towards Strand-on-the-Green. Homeowners in these streets are typically balancing exceptional architectural stock with modern family needs — an Edwardian bay-fronted house that also needs a bright kitchen-diner, a Bedford Park cottage that needs a discreet loft ensuite, or a Grove Park semi that needs a full open-plan rear extension without losing the family study. Hounslow Council's planning department is careful with Chiswick — particularly inside Bedford Park where a strict character statement applies — and we handle those planning submissions in-house.

Section · 03

Services we deliver in Chiswick

Our most frequent Chiswick briefs include: side-return kitchen extensions with rooflight bands or full glazed roofs; wrap-around extensions on the wider semi-detached Edwardian terraces; loft conversions with hidden dormers to preserve street-facing rooflines in Bedford Park; and complete modern refurbishments that add underfloor heating, replaster to a wet-plaster finish and rewire while preserving original mouldings, cornice and joinery. In-house bespoke joinery lets us deliver fitted kitchens, staircases, wardrobes and window seats to the architectural precision Chiswick clients expect. All work is delivered under a single fixed-price contract with our 10-year structural guarantee.

Section · 04

Why Prime Build for your Chiswick project

Design-led families in Chiswick tell us they choose us because we treat their architect's drawings as the specification, not a guide. We don't 'value-engineer' details out of the design. We flag any drawing ambiguity before you commit and price, so there are no surprise change orders. We run tidy, protected sites — critical when homeowners are living around us — and we hand over each project with a completed snag list, all as-built information, and post-completion aftercare for a full year. If you're planning a Chiswick project and haven't yet appointed an architect, we can introduce W4-based practices who share this way of working.

Popular services in Chiswick

What we typically build in W4.

Service

Kitchen Renovations

From a fresh kitchen fit-out to a full open-plan kitchen-diner extension with bifold doors and underfloor heating — we design, build and finish kitchens that will define your home for the next decade.

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Service

House Extensions

From single-storey kitchen extensions to full double-storey side-returns, we design and build extensions that add space, value and light to your London home — completed on time, on budget and to a 10-year structural guarantee.

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Service

Loft Conversions

Turn unused roof space into a master suite, home office or family room. We design and build dormer, mansard, hip-to-gable and L-shape loft conversions across London — from structural opening to finished ensuite.

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Service

Full House Renovations

A whole-home renovation is the deepest, most transformative project we deliver — and the one we love most. From strip-out and structural openings through MEP, joinery, kitchens, bathrooms and finishing, you get one accountable team and one contract.

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Local projects

Recently delivered in Chiswick.

Renovation

Chiswick Refurbishment — Steel & First Fix

Extension

Chiswick Extension — External Brickwork & Soldier Course

Renovation

Chiswick Modern Kitchen Fit-Out

FAQs · Builders in Chiswick

Answers for Chiswick homeowners.

Yes — we've completed projects inside Bedford Park and are familiar with the Bedford Park character brief and Hounslow's conservation-area review process. We prepare and submit the required Design and Access Statement and coordinate with the conservation officer.

Serving Chiswick