Basement Conversions · W13 West Ealing
Ealing applies standard suburban householder control across W13, with a conservation pocket around Drayton Green.
This page covers one part of the borough. For the full picture — fees, timelines and the council's current position — read basement conversions in Ealing.
Basement conversions and lowering existing cellars in West Ealing add space without touching the roofline — valuable on W13's period houses around West Ealing, Drayton Green, Northfields fringe. Ealing Council reviews structural, drainage and flood-risk impact, and a Party Wall award plus a Thames Water build-over agreement are usually required. We coordinate the structural engineer and the waterproofing design.
Full architectural technology service for basement digs and cellar conversions in West Ealing — structural underpinning design, waterproofing strategy, Party Wall coordination, planning where required, and building regulations through to completion certificate.
Across West Ealing, Drayton Green, Northfields fringe in W13, the dominant property is edwardian and inter-war bay-fronted semis and terraces, with mansion blocks around west ealing and the drayton green streets. That stock shapes what basement conversion 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 West Ealing property, confirm the planning route — Permitted Development, a Lawful Development Certificate, or full planning — and draw a council-ready set tailored to the W13 streetscape.
Housing stock in W13: Edwardian and inter-war bay-fronted semis and terraces, with mansion blocks around West Ealing and the Drayton Green streets.
Within the district: West Ealing, Drayton Green, Northfields fringe.
Streets we know in W13: the Drayton Green and Cleveland Park roads, Northcroft Road and the Lammas Park terraces. Each road has its own building line, boundary treatment and precedent that Ealing Council weighs when assessing a basement conversion drawings scheme.
Conservation areas: Drayton Green, Lammas Park (adjoining). Inside these, most external work needs full planning and a Heritage Statement.
Getting around W13: West Ealing on the Elizabeth line and Northfields on the Piccadilly line.
Regeneration: West Ealing falls within or beside the West Ealing / Elizabeth line growth area, which shapes local planning policy and design expectations.
Property values: W13 sold well above the borough as a whole in 2025: a £705,000 median against £532,750 across Ealing. Contains HM Land Registry data (c) Crown copyright and database right 2026
Borough character: Leafy outer-west London; Bedford Park conservation area has strict heritage controls; rest of borough generally permissive.
Desktop study plus measured survey assessing existing foundations, ground conditions, water table level and underpinning viability for your West Ealing property.
New-build basements and lightwell extensions need planning permission. Cellar conversions of existing space are usually Permitted Development. We confirm the route and submit where needed.
Underpinning sequence drawings, reinforced concrete design, temporary works strategy — all to Eurocode with chartered engineer sign-off.
BS 8102:2022 compliant — cavity drain, cementitious tanking or membrane system specified for West Ealing's ground conditions and water table.
Full Plans application to Ealing Council Building Control or an approved inspector covering structure (Part A), fire safety (Part B), damp-proofing (Part C), ventilation (Part F) and thermal performance (Part L).
Almost every West Ealing basement triggers Party Wall notices. We also manage Thames Water Build Over Agreements where within 3m of a public sewer.
Single planning or building-regs submission.
Planning + building regs + structural.
Listed, conservation or complex sites.
Yes. The Edwardian and inter-war semis around Drayton Green and Cleveland Park suit rear and side extensions plus loft conversions, much of it within Permitted Development outside the conservation area, confirmed with a Lawful Development Certificate. We confirm the route and draw to Ealing's checklist.
West Ealing on the Elizabeth line has cut journey times to central London and Heathrow, lifting demand across W13. For a house project it improves the backdrop; your scheme is still governed by Permitted Development limits and Ealing householder policy, which we apply.
Usually yes — a hip-to-gable plus rear dormer on the semis, within the volume allowance and confirmed by a Lawful Development Certificate, provided you're not in the Drayton Green conservation area. We check the constraints for your road and draw it for Building Control.
Family-house extensions and lofts on the bay-fronted Edwardian and inter-war stock — side-returns, rear additions and hip-to-gable lofts. With houses around £750,000-£1m, the added space justifies a council-ready scheme; we handle planning and Building Regulations drawings together.
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 W13 address.
For a W13 project across West Ealing, Drayton Green, Northfields 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 West Ealing application through every officer query to the decision.
West Ealing (W13) sits primarily in Ealing, so applications are decided by Ealing Council. Conservation areas within W13 include Drayton Green, Lammas Park (adjoining), 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 basement conversion drawings in West 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 W13'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 W13 homes.
Extensions on a boundary plot can involve two authorities. Everything we draw and submit is listed for NW10, W3, W4, W5 and W7.
Pick a slot that suits you. No obligation and no sales pressure, just straight answers on your planning route.
Every W13 postcode district we draw in, the stock that dominates it and the authority that validates a basement conversion there. W13 fees below are the statutory England rates for 2026, not basement conversion estimates.
| Postcode | Area | Dominant stock | What it means for a basement conversion |
|---|---|---|---|
| W13 | West Ealing | Edwardian terraces | West Ealing sits wholly inside W13, so Ealing Council validates every basement conversion submitted from an W13 address. |
| W3 | Acton | Victorian and Edwardian terraces | Adjoining district to W13, also inside Ealing for basement conversion purposes. |
| W5 | Ealing | Edwardian villas, Victorian terraces | Adjoining district to W13, also inside Ealing for basement conversion purposes. |
| W7 | Hanwell | Edwardian villas, 1930s semi-detached | Adjoining district to W13, also inside Ealing for basement conversion purposes. |
Roof pitch, wall build-up and plot depth change every few W13 streets, and each one changes what a basement conversion can achieve at that address.
W13 (West Ealing) conservation designations: there are 30 across Ealing Council, Acton Green, Hanwell, Ealing Broadway among them. Designation costs a W13 (West Ealing) owner the permitted-development route: a basement conversion then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Bedford Park is the W13 (West Ealing) designation that most often changes a basement conversion design.
What Article 4 removes near W13 (West Ealing): Article 4 for HMOs in specific streets in Acton, Ealing and Southall. Before pricing a basement conversion we check whether the W13 address is inside the mapped area, because Ealing Council draws the W13 (West Ealing) boundary street by street rather than across the whole of W13 (West Ealing).
What W13 (West Ealing) is built from: 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. That mix decides the basement conversion route in W13 (West Ealing) more than the postcode does, and it is what a Ealing Council case officer reads first. A householder application costs £548 paid to Ealing Council direct, with 8 weeks to a decision once validated.
Sources for this W13 basement conversion 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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