House Extensions · W5 Ealing
Ealing applies conservation control across several W5 villa suburbs; the large plots make rear and side extensions a strong local market.
This page covers one part of the borough. For the full picture — fees, timelines and the council's current position — read house extensions in Ealing.
House extensions in Ealing are dominated by single-storey rear and side-return additions on W5's substantial edwardian and victorian villas and semis, with double-storey and wrap-around schemes where the plot allows. Ealing Council weighs depth, height and neighbour daylight; many extensions across Ealing, Ealing Broadway, Pitshanger, Montpelier are Permitted Development, which we confirm with a Lawful Development Certificate before you build.
The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical phase, ideal for substantial edwardian and victorian villas and semis typical of Ealing.
Across Ealing, Ealing Broadway, Pitshanger, Montpelier in W5, the dominant property is substantial edwardian and victorian villas and semis, inter-war housing and mansion blocks across ealing, 'queen of the suburbs'. That stock shapes what house extension 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 Ealing property, confirm the planning route — Permitted Development, a Lawful Development Certificate, or full planning — and draw a council-ready set tailored to the W5 streetscape.
Housing stock in W5: Substantial Edwardian and Victorian villas and semis, inter-war housing and mansion blocks across Ealing, 'Queen of the Suburbs'.
Within the district: Ealing, Ealing Broadway, Pitshanger, Montpelier.
Streets we know in W5: the Pitshanger and Montpelier roads, Mount Park Road, Castlebar Road and Hamilton Road. Each road has its own building line, boundary treatment and precedent that Ealing Council weighs when assessing a house extension drawings scheme.
Conservation areas: Ealing Green, Montpelier, Pitshanger, Mount Park. Inside these, most external work needs full planning and a Heritage Statement.
Getting around W5: Ealing Broadway on the Central, District and Elizabeth lines, plus Ealing rail.
Regeneration: Ealing falls within or beside the Ealing Broadway / Elizabeth line growth area, which shapes local planning policy and design expectations.
Property values: around £450,000 for a flat and £900,000-£1.4m for a house — a useful gauge of the build value an extension or loft adds in W5.
Borough character: Leafy outer-west London; Bedford Park conservation area has strict heritage controls; rest of borough generally permissive.
Measured existing survey, photographic record, Article 4 and conservation check specific to Ealing before we quote.
2–3 design options at concept stage — alternative layouts, glazing, roof forms.
Site location plan, existing and proposed plans, elevations, sections, D&AS where required.
Part L thermal, Part B fire, Part M accessibility, structural strategy.
Steel beam, foundation, lintel design. Chartered engineer sign-off.
Party Wall notices where needed; Thames Water Build Over Agreement where within 3m of a public sewer.
Single planning or building-regs submission.
Planning + building regs + structural.
Listed, conservation or complex sites.
Because W5 is full of substantial Edwardian and Victorian villas and semis on generous plots around Pitshanger and Montpelier — ideal for rear, side and double-storey extensions and large loft conversions as families grow. We've drawn the full range here to Ealing's standards, on both Permitted Development and full-planning routes.
Ealing Broadway on the Elizabeth line has cut journey times across London, reinforcing W5's status as a premium family suburb and supporting values. For a house project the binding controls remain Permitted Development limits and the local conservation designation, which we check for your road.
Often, yes. The larger semis and detached houses around Mount Park Road and Castlebar Road have the plot and separation for a two-storey side or rear extension, subject to Ealing's design and neighbour-amenity policy. We design within those limits and draw the scheme for planning and Building Control.
Ealing Green, Montpelier, Pitshanger and Mount Park all carry conservation designations within W5, controlling materials, bays and roofscape. We check your exact address, because it determines whether you need full planning and a Heritage Statement rather than a Lawful Development Certificate.
With Ealing property at around £450,000 for a flat and £900,000-£1.4m for a house, the professional drawing fee is a small fraction of the value the work adds to W5's substantial edwardian and victorian villas and semis. Ealing Council charges its own statutory application fee on top (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 W5 address.
For a W5 project across Ealing, Ealing Broadway, Pitshanger, Montpelier, 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 Ealing application through every officer query to the decision.
Ealing (W5) sits primarily in Ealing, so applications are decided by Ealing Council. Conservation areas within W5 include Ealing Green, Montpelier, Pitshanger, Mount Park, 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 house extension drawings in Ealing — 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 W5'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 W5 homes.
If your site sits close to the edge of the borough, it is worth checking the authority next door. Browse everything we do in NW10, W3, W4, W7 and W13.
Pick a slot that suits you. No obligation and no sales pressure, just straight answers on your planning route.
Every W5 postcode district we draw in, the stock that dominates it and the authority that validates a house extension there. W5 fees below are the statutory England rates for 2026, not house extension estimates.
| Postcode | Area | Dominant stock | What it means for a house extension |
|---|---|---|---|
| W5 | Ealing | Edwardian villas, Victorian terraces | W5 covers Ealing only; Ealing Council handles the house extension. |
| W5 | Ealing Broadway | Edwardian villas, Victorian terraces | Ealing Broadway sits inside W5; house extension proposals here are determined by Ealing Council. |
| W5 | Pitshanger | Edwardian villas | Pitshanger sits inside W5; house extension proposals here are determined by Ealing Council. |
| W3 | Acton | Victorian and Edwardian terraces | Adjoining district to W5, also inside Ealing for house extension purposes. |
| W7 | Hanwell | Edwardian villas, 1930s semi-detached | Adjoining district to W5, also inside Ealing for house extension purposes. |
| W13 | West Ealing | Edwardian terraces | Adjoining district to W5, also inside Ealing for house extension purposes. |
Roof pitch, wall build-up and plot depth change every few W5 streets, and each one changes what a house extension can achieve at that address.
W5 (Ealing) conservation designations: there are 30 across Ealing Council, Pitshanger, Bedford Park, Acton Green among them. Designation costs a W5 (Ealing) owner the permitted-development route: a house extension then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Hanwell is the W5 (Ealing) designation that most often changes a house extension design.
Article 4 and your W5 (Ealing) house extension: Article 4 for HMOs in specific streets in Acton, Ealing and Southall. At a W5 address that matters twice over, because Ealing Council applies the direction unevenly across W5 (Ealing) — we read the W5 (Ealing) policies map for the exact W5 address before quoting house extensions.
The building fabric around W5 (Ealing): 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. A house extension in W5 (Ealing) is scoped against that stock first, because it decides whether the scheme runs as permitted development, a £274 Lawful Development Certificate, or a full £548 application to Ealing Council.
Sources for this W5 house extension 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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