Rear Dormer Loft Conversions · W7 Hanwell
Ealing controls the Hanwell Village Green and Churchfields conservation areas; the Elizabeth line has lifted demand across W7.
This page covers one part of the borough. For the full picture — fees, timelines and the council's current position — read rear dormer loft conversions in Ealing.
A rear dormer is the workhorse loft conversion on W7's terraces in Hanwell — a box across the rear roof slope adding a double bedroom and bathroom while keeping the front roofline intact for the street. Most rear dormers near Hanwell, Boston Manor fringe, Churchfields, West Ealing fringe are Permitted Development, which we confirm with Ealing Council via a Lawful Development Certificate.
London's most popular loft type — the full-width rear dormer. Planning or Permitted Development route assessed for your Hanwell property, building regulations, structural steelwork and Party Wall notices.
Across Hanwell, Boston Manor fringe, Churchfields, West Ealing fringe in W7, the dominant property is edwardian and inter-war terraces and semis around hanwell, with cottage-style streets near the brent valley and pockets of larger housing. That stock shapes what rear dormer drawings looks like here: the right approach for a period terrace differs from a mansion-block flat or a new-build, and Ealing Council judges each on design quality and neighbour impact. We survey the specific Hanwell property, confirm the planning route — Permitted Development, a Lawful Development Certificate, or full planning — and draw a council-ready set tailored to the W7 streetscape.
Housing stock in W7: Edwardian and inter-war terraces and semis around Hanwell, with cottage-style streets near the Brent valley and pockets of larger housing.
Within the district: Hanwell, Boston Manor fringe, Churchfields, West Ealing fringe.
Streets we know in W7: the Churchfields and Golden Manor streets, Boston Road, Cuckoo Estate roads and the Hanwell village streets. Each road has its own building line, boundary treatment and precedent that Ealing Council weighs when assessing a rear dormer drawings scheme.
Conservation areas: Hanwell Village Green, Churchfields, St Mary's Hanwell. Inside these, most external work needs full planning and a Heritage Statement.
Getting around W7: Hanwell on the Elizabeth line, with quick links to central London and Heathrow.
Regeneration: Hanwell falls within or beside the Elizabeth line growth corridor, which shapes local planning policy and design expectations.
Property values: flats and houses sold in almost equal numbers across Ealing in 2025: 1,409 flat and maisonette transactions against 1,410 houses of all three types. The flats had a £420,000 median. W7's own midpoint, over 255 sales, was £550,000.
Borough character: Leafy outer-west London; Bedford Park conservation area has strict heritage controls; rest of borough generally permissive.
We confirm whether your Hanwell rear dormer qualifies for Permitted Development — checking volume limits (40m³ terraced, 50m³ semi/detached), Article 4, conservation area and prior extension history.
If PD applies, we obtain a Lawful Development Certificate for certainty. If not, we submit full planning with Design & Access Statement to Ealing Council.
Full-width flat-roof rear dormer with matching materials, set in from party walls, cheeks clad to match existing roof — the design that Ealing Council approves most readily.
Part B fire escape (protected staircase, fire doors, smoke alarms), Part K staircase, Part L insulation, Part E acoustic separation.
Steel ridge beam, purlin supports, dormer framing, floor joist upgrade — chartered engineer sign-off for Building Control.
Most rear dormers in Hanwell's terraced streets trigger Section 6 Party Wall notices. We draft, serve and coordinate the process.
Single planning or building-regs submission.
Planning + building regs + structural.
Listed, conservation or complex sites.
Yes. The Edwardian and inter-war terraces and semis around Churchfields and Boston Road suit rear and side extensions plus loft conversions, much of it within Permitted Development outside the conservation areas, confirmed with a Lawful Development Certificate. We confirm the route and draw to Ealing's checklist.
Hanwell on the Elizabeth line has cut journey times to central London and Heathrow, lifting demand and values across W7. For a house project it improves the backdrop; your scheme is still governed by Permitted Development limits and Ealing householder policy, which we apply.
The Hanwell Village Green and Churchfields conservation areas protect the older village core and the streets around St Mary's, so external changes there need full planning with a Heritage Statement. We design sympathetically and submit to Ealing.
Usually yes on the semis and terraces — a hip-to-gable plus rear dormer within the volume allowance, confirmed by a Lawful Development Certificate, provided you're not in a conservation area. We check the constraints for your road and draw it for Building Control.
Ealing Council charges its own statutory application fee (currently £548 for a householder planning application, £610 for a full application). We quote the drawings as one fixed price and the free site survey covers every W7 address.
For a W7 project across Hanwell, Boston Manor fringe, Churchfields, West Ealing fringe, expect roughly 3–4 weeks from instruction to submission: week 1 the measured survey, weeks 2–3 the drawings and your revisions, then validation and the statutory determination by Ealing Council (8 weeks for a householder application). We carry the Hanwell application through every officer query to the decision.
Hanwell (W7) sits primarily in Ealing, so applications are decided by Ealing Council. Conservation areas within W7 include Hanwell Village Green, Churchfields, St Mary's Hanwell, where full planning and a Heritage Statement are required. We confirm the planning route for your exact address before quoting.
Almost always. Any structural work behind rear dormer drawings in Hanwell — new openings, steel beams, loft floors, foundations — needs Building Regulations approval covering structure (Part A), fire escape (Part B) and insulation (Part L), submitted to Ealing Council Building Control or an approved inspector. On W7's typically terraced and semi-detached stock, a Party Wall notice to adjoining neighbours is normally required before the steelwork. We coordinate both as part of the Complete package.
In value terms, yes. The bigger risk is an unapproved or non-compliant scheme — which is why council-ready drawings and a clean Building Control sign-off matter on W7 homes.
Householders often approach us after a neighbour used a different council. Our full range is set out for NW10, W3, W4, W5 and W13.
Pick a slot that suits you. No obligation and no sales pressure, just straight answers on your planning route.
Every W7 postcode district we draw in, the stock that dominates it and the authority that validates a rear dormer there. W7 fees below are the statutory England rates for 2026, not rear dormer estimates.
| Postcode | Area | Dominant stock | What it means for a rear dormer |
|---|---|---|---|
| W7 | Hanwell | Edwardian villas, 1930s semi-detached | W7 covers Hanwell only; Ealing Council handles the rear dormer. |
| W3 | Acton | Victorian and Edwardian terraces | Adjoining district to W7, also inside Ealing for rear dormer purposes. |
| W5 | Ealing | Edwardian villas, Victorian terraces | Adjoining district to W7, also inside Ealing for rear dormer purposes. |
| W13 | West Ealing | Edwardian terraces | Adjoining district to W7, also inside Ealing for rear dormer purposes. |
Roof pitch, wall build-up and plot depth change every few W7 streets, and each one changes what a rear dormer can achieve at that address.
How designation changes a W7 (Hanwell) rear dormer: Ealing Council maintains 30 conservation areas, including Ealing Broadway, Pitshanger, Bedford Park. Inside any of them a W7 (Hanwell) rear dormer cannot rely on permitted development, and the route becomes a £548 householder application determined in 8 weeks rather than a £249 prior approval in 6 weeks. Bedford Park sets the tone for W7 (Hanwell) casework.
W7 (Hanwell) and Article 4: Article 4 for HMOs in specific streets in Acton, Ealing and Southall. A rear dormer planned at a W7 address is checked against that direction first; Ealing Council publishes the W7 (Hanwell) extent, and the W7 line rarely follows the W7 (Hanwell) boundary you would expect.
W7 (Hanwell) housing stock: Victorian and Edwardian villas in Ealing central; 1930s semi-detached in Northolt and Hanwell; mansion blocks along main roads; Bedford Park is a listed Arts & Crafts garden suburb. Leafy outer-west London; Bedford Park conservation area has strict heritage controls; rest of borough generally permissive. Read that before choosing a rear dormer route in W7 (Hanwell) — construction, not postcode, sets what is achievable. Ealing Council charges £548 for a householder application and has 8 weeks to determine it.
Sources for this W7 rear dormer page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.
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