Loft Conversions, Chiswick
Loft conversions
in Chiswick.
A West London team building dormer, mansard, hip-to-gable and L-shaped loft conversions across Chiswick, Turnham Green, Bedford Park and Acton Green. Conservation-area planning handled, ten-year warranty, and a project manager minutes from your door.
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Free site visit, itemised quote, no obligation.
Chiswick Loft Conversion Specialists
The extra bedroom is already in your roof.
Nexus Lofts & Extensions builds loft conversions across Chiswick and the London Borough of Hounslow's W4 streets: the High Road, Sutton Court Road, the Glebe Estate, Bedford Park, Old Chiswick, Strand-on-the-Green, Turnham Green and Acton Green. We do the whole job ourselves, so the same team draws it, engineers it, takes it through planning, serves the party wall notices and builds it. Most Chiswick lofts complete in six to ten weeks on site, and you stay in the house throughout.
What suits your house
Chiswick roofs, and what each one will give you.
Chiswick is not one housing stock. A Glebe Estate terrace, a Bedford Park villa and a 1930s semi in Acton Green need three different answers, and getting that call right at the start is most of the job.
Victorian terraces, High Road, Sutton Court Road & the Glebe Estate
Tall, narrow houses with steep pitched roofs and generous ridge heights, much of it inside the Glebe Estate conservation area where the roofscape is part of the designation. A set-back rear dormer keeps the front pitch untouched, and where the rules allow it a full mansard adds the most volume. Brick and slate are matched to the original so the roof reads as though it was always there.
Usually best: Set-back rear dormer or mansard
Bedford Park and Old Chiswick
Bedford Park is one of the earliest garden suburbs in the country and Old Chiswick holds some of the oldest building stock in the borough, so both are heavily protected. Roof form here is discussed street by street: some properties support a discreet rear dormer under permitted development, while others need a full application with matching materials and a dormer set well below the ridge.
Usually best: Set-back rear dormer, sympathetic materials
1930s and Edwardian semis, Turnham Green & Acton Green
Hipped roofs with a shallow pitch, similar to the stock we build on every week in Ealing and Hanwell. A hip-to-gable squares off the side slope and a rear dormer takes the rest, usually enough for a double bedroom, an en-suite and built-in storage. Most of these streets sit outside conservation control and proceed under permitted development.
Usually best: Hip-to-gable + rear dormer
Houses with a rear outrigger, South Chiswick & near the A4
Narrow plans with a two-storey back addition, tight access off the side street and pavement scaffolding. An L-shaped dormer wraps the main roof into the outrigger and typically yields two usable rooms rather than one, with the staircase landing over the existing return. Party wall notices go out early because the terraces are joined on both sides.
Usually best: L-shaped dormer
Planning & permissions
Getting it through Hounslow Council.
Most loft conversions in Chiswick can be built under Permitted Development, which means no full planning application, provided the added volume stays within the allowance, the dormer sits to the rear and the materials match the existing house. We normally still apply for a Lawful Development Certificate, because it is what your solicitor will ask for when you sell.
The catch in W4 is that Chiswick is one of the most conservation-controlled parts of our patch. Bedford Park, the Glebe Estate, Old Chiswick and Strand-on-the-Green all sit under conservation designation, and some streets carry an Article 4 direction on top, which removes permitted development rights entirely and means even a modest rear dormer needs a full application. In those streets Hounslow looks hard at roof form, dormer position, materials and how the roof reads from the street, which is why sympathetic set-back dormers and matched brick and slate matter more here than they do a few miles east.
Either way you also need building control approval and, on almost any Chiswick terrace or semi, a party wall notice served on your neighbours. We prepare all of it, and you get one point of contact rather than a chain of consultants.
If you own a flat rather than a house, the lease is the first document we look at. Chiswick has a lot of converted flats in large Victorian and Edwardian houses, and on much of that stock the roof space is not part of the property you bought, so the conversion depends on freeholder consent and a deed of variation. We check that before you spend money on drawings.
Why choose Nexus
A West London builder, not a national with a Chiswick landing page.
Ten minutes from Chiswick
Our office is at Unit 35, 4 Spring Bridge Road, Ealing W5, just up the road from W4. Your project manager is on site fast, and snags get closed out in days, not weeks.
We know Chiswick's planning map
Bedford Park, the Glebe Estate, Old Chiswick, Strand-on-the-Green, Article 4 directions and Hounslow's conservation guidance. We design to what the council will actually approve rather than submitting and hoping.
One team, start to finish
Design, structural calculations, planning, party wall, building control and construction under one roof. No hand-offs and no chasing three separate firms.
Ten-year warranty
Structural workmanship covered for ten years after handover, alongside manufacturer warranties on windows, insulation and mechanical fittings.
Our Process
From first call to final handover
A clear, five-stage journey designed to keep you informed and in control at every step.
- Step 01
Consultation
A no-obligation site visit to understand your goals, budget and timeline.
- Step 02
Design & Quote
Detailed drawings and a transparent, itemised quotation, with no surprises later.
- Step 03
Planning & Approvals
We handle planning permission, building control and party wall agreements end-to-end.
- Step 04
Build
One dedicated team, weekly updates and a clean, considerate site from start to finish.
- Step 05
Sign-off & Warranty
Final inspections, snagging and handover, backed by our 10-year workmanship warranty.
Client stories
Trusted by homeowners across West London
Averaging 5.0 stars across Google, Checkatrade and MyBuilder. Here's what our clients had to say after handover.
Our kitchen extension in Ealing was done by Nexus and we're really pleased. Good communication, fair pricing, and a nice clean finish. Would happily recommend them for extensions in West London.
James Whitmore
Kitchen Extension · Ealing, W5
Had a great experience with Nexus for a small loft upgrade in West London. They worked quickly, kept everything organised, and the result is lovely. Ideal company for loft work in Ealing.
Emily Rowen
Loft Upgrade · Acton, W3
Extremely happy with our loft conversion by Nexus. Delivered on time with excellent workmanship, a clear and transparent quote, and a tidy, well-managed project throughout. Professional, reliable, and great to work with.
Moez
Loft Conversion · Chiswick, W4
Nexus did our rear extension in Ealing and it turned out better than we hoped. The builders were friendly and tidy, and the finish is spot on. Great choice if you need a home extension in West London.
Daniel Mercer
Rear Extension · Hanwell, W7
Really happy with my loft conversion in Ealing. Nexus were easy to deal with, kept me updated, and did a cracking job. The new space looks brilliant. Would definitely recommend for loft conversions.
Sophie Hartley
Loft Conversion · Ealing, W13
Where we build in Chiswick
Every corner of W4.
Chiswick High Road, Sutton Court Road, the Glebe Estate, Bedford Park, Old Chiswick, Strand-on-the-Green, Turnham Green, Acton Green, South Chiswick and Duke's Meadows, covering W4 and the edges of W3 and TW8. We also build loft conversions in neighbouring Ealing, Acton, Hammersmith, Richmond and Kew.
Chiswick Loft Conversion FAQs
Chiswick questions, answered
Conservation areas, Article 4 streets, leasehold flats, timings and what suits your roof: the questions Chiswick homeowners ask us most.
Ask us directlyMany Chiswick loft conversions fall under Permitted Development, so no full planning application is needed, provided the added volume stays within the allowance, the dormer sits to the rear and the materials match the existing house. But Chiswick is one of the most heavily conservation-controlled parts of our patch: much of the Bedford Park, Glebe Estate, Old Chiswick and Strand-on-the-Green area sits under conservation designation, and some streets carry an Article 4 direction on top, which removes permitted development rights entirely. We confirm which rules your street sits under during the free site visit and handle the submission to Hounslow Council either way.
Ready when you are
Let's build something worth staying home for.
Book a free, no-obligation site visit. We'll walk your space, talk through what's possible, and follow up with a clear, itemised quote: no pressure, no hidden extras.
Request a callback
Tell us about your project and we'll be in touch shortly.