Chiswick · West London

Architectural Designers in
Chiswick, W4

Chiswick has some of the best-preserved late Victorian and Edwardian housing in West London, and Bedford Park is one of the most tightly controlled conservation areas in the capital. Getting work approved here is a heritage exercise as much as a design one.

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Grove Park house extension in Chiswick, W4 - Rosace Design Studio

Working in Chiswick

Extensions and lofts across W4

Chiswick sits in the London Borough of Hounslow. The housing is mostly late Victorian and Edwardian, with generous plots by West London standards and rear gardens that can take a substantial addition. Rear extensions, side returns and wraparounds all work well on the terraced and semi-detached stock.

Loft conversions are common across W4. The roof forms on Edwardian semis in Grove Park and around Turnham Green usually suit a rear dormer or a hip-to-gable conversion, both of which can often proceed under Permitted Development outside the controlled areas.

Bedford Park is a different proposition entirely, and we have set out what that means in the planning section below.

Services in Chiswick

What we design and build across the area

The range of work in Chiswick is broad because the housing stock is. Terraces off Chiswick High Road suit side returns and wraparounds. The larger Edwardian semis in Grove Park take double storey extensions and substantial loft conversions comfortably.

We manage design, planning and construction under one contract, which keeps the heritage detailing that gets approved intact through to the build.

  • Rear, side return and wraparound extensions
  • Double storey extensions
  • Dormer and hip-to-gable loft conversions
  • Whole-house renovations
  • Conservation area and Article 4 applications
  • Heritage statements
  • Interior design and specification

Planning in Chiswick

Bedford Park, Article 4 and the rest of W4

Bedford Park is the significant constraint in Chiswick. Built from the 1870s as one of the first garden suburbs, it is a conservation area with an Article 4 direction that removes many Permitted Development rights. Windows, doors, roof tiles and front boundary treatments are all controlled, and a full planning application with a heritage statement is normally required even for modest changes.

A number of Bedford Park properties are also individually listed, which adds listed building consent on top of planning permission and brings internal alterations into scope as well.

Outside Bedford Park the picture is more relaxed. Much of Grove Park, Turnham Green and the streets north of Chiswick High Road retain standard Permitted Development rights, so rear extensions and rear dormers can often proceed without a planning application. We confirm the position for every property before design work begins.

Cost Guide

What projects cost in Chiswick

Construction costs in Chiswick typically range from £2,600 to £4,000 per square metre. A single storey rear extension usually costs between £65,000 and £135,000. Double storey extensions generally run £110,000 to £210,000.

Loft conversions range from £52,000 to £105,000 depending on type. Work within Bedford Park typically carries a premium of 15 to 25 percent because of the specialist materials and detailing the conservation area requires.

Professional fees add 10 to 15 percent, rising to 15 percent or more inside Bedford Park given the heritage documentation involved. See our house extension cost guide for broader pricing.

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Property Types

Chiswick's housing stock

Bedford Park is the architectural set piece, an arts-and-crafts garden suburb of red brick houses with white-painted joinery, tile-hung gables and Dutch details, laid out from the 1870s. It is widely regarded as the first garden suburb anywhere and the conservation controls reflect that.

Elsewhere W4 is more varied. Grove Park has substantial Edwardian semis and detached houses on wide plots. The streets around Turnham Green and Chiswick High Road are largely late Victorian terraces. Strand on the Green along the river has older cottages and some listed buildings, and Gunnersbury has a mix of inter-war and post-war housing.

Nearby Areas

We also work across West London

Alongside Chiswick we take on projects in Bedford Park, Grove Park, Turnham Green, Acton Green, Gunnersbury and Strand on the Green. We also work across Barnes, Richmond, Fulham and Notting Hill.

Beyond West London we cover all of Greater London and within a 30-mile radius, including Kensington, Chelsea, Wandsworth and Surrey.

Recent Projects

Selected period property work across London

Rear extension with pitched roof on a period terrace Single storey rear extension on a Victorian terrace
Loft conversion on a period London property
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Common Questions

Design and planning in Chiswick - answered

Do I need planning permission for an extension in Chiswick? +
It depends where in W4 you are. Inside Bedford Park an Article 4 direction removes many Permitted Development rights, so a full planning application with a heritage statement is normally required even for modest changes including windows, doors, roof tiles and front boundaries. Outside Bedford Park, much of Grove Park, Turnham Green and the streets north of Chiswick High Road retain standard PD rights.
What is the Article 4 direction in Bedford Park? +
An Article 4 direction is a formal step a council takes to withdraw Permitted Development rights in a defined area. In Bedford Park it means alterations that would elsewhere be automatic now need planning permission. In practice that covers replacement windows and doors, roof coverings, front boundary walls and railings, as well as extensions. It exists because Bedford Park is one of the earliest and most intact garden suburbs in the country.
How much does a house extension cost in Chiswick? +
Construction costs in Chiswick typically range from 2,600 to 4,000 pounds per square metre. A single storey rear extension usually costs between 65,000 and 135,000 pounds and a double storey extension 110,000 to 210,000 pounds. Work inside Bedford Park typically carries a premium of 15 to 25 percent because of the specialist materials and detailing required.
Can I convert my loft in Chiswick? +
Yes. The roof forms on Edwardian semis around Grove Park and Turnham Green suit rear dormers and hip-to-gable conversions well, and outside the controlled areas these can often proceed under Permitted Development. Inside Bedford Park any change to the roofline needs a full planning application and the design will be assessed against the conservation area character.
Is my Chiswick property listed? +
A number of properties in Bedford Park and along Strand on the Green are individually listed. Listing brings internal alterations into scope as well as external ones, and requires listed building consent on top of planning permission. We check the listing and conservation position for every property at the start of a project.
How long does a Chiswick project take? +
A rear extension typically takes 9 to 14 months from first meeting to completion outside the conservation areas. Inside Bedford Park allow 12 to 18 months, since the planning application adds 8 to 12 weeks and pre-application discussion with the conservation officer is strongly advisable. Loft conversions run to a similar timescale.
Does Hounslow Council approve contemporary extensions? +
Outside the conservation areas, generally yes at the rear where the addition is not prominent from the street. Inside Bedford Park the bar is much higher and the expectation is that new work respects the arts-and-crafts character in materials and proportion. Contemporary interventions are not ruled out but they need a strong heritage justification.

Chiswick · West London

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