Basement Conversions · W5 Ealing
Fixed-fee basement conversion drawings for Ealing, Ealing Broadway, Pitshanger, Montpelier in the W5 postcode, drawn by an MCIAT-chartered architectural technologist and submitted to Ealing Council. Ealing applies conservation control across several W5 villa suburbs; the large plots make rear and side extensions a strong local market.
MCIAT chartered drawings for planning, building regs, lofts and extensions — fixed fees 30% below typical London architects. Tell us what you need and we’ll reply the same working day.
Basement conversions and lowering existing cellars in Ealing add space without touching the roofline — valuable on W5's period houses around Ealing, Ealing Broadway, Pitshanger, Montpelier. 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 Ealing — structural underpinning design, waterproofing strategy, Party Wall coordination, planning where required, and building regulations through to completion certificate.
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 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 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 basement conversion 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.
Desktop study plus measured survey assessing existing foundations, ground conditions, water table level and underpinning viability for your 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 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 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.
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.
Our fixed fee for basement conversion drawings in Ealing starts at £1,950 — no hourly billing. 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 £258 for a householder planning application, £578 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. Article 4 in force in the borough: Yes. 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 basement conversion 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. With Ealing (W5) property at around £450,000 for a flat and £900,000-£1.4m for a house, a well-designed extension or loft typically returns more than it costs in added floor area and sale value, while our fixed drawing fee from £1,950 keeps the professional cost predictable. 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.
From £840.
From £840.
From £1,225.
From £1,225.
From £1,575.
From £995.
From £350.
From £540.
From £450.
From £1,225.
Pick a slot that suits you. No obligation and no sales pressure — just straight answers on your planning route, fixed fee and timescale.
Every W5 postcode district we draw in, the stock that dominates it and the authority that validates a basement conversion there. W5 fees below are the statutory England rates for 2026, not basement conversion estimates.
| Postcode | Area | Dominant stock | What it means for a basement conversion |
|---|---|---|---|
| W5 | Ealing | Edwardian villas, Victorian terraces | W5 covers Ealing only; Ealing Council handles the basement conversion, and Ealing case officers apply the W5 conservation-area map. |
| W5 | Ealing Broadway | Edwardian villas, Victorian terraces | Ealing Broadway sits inside W5; basement conversion proposals here are determined by Ealing Council. |
| W5 | Pitshanger | Edwardian villas | Pitshanger sits inside W5; basement conversion proposals here are determined by Ealing Council. |
| W3 | Acton | Victorian and Edwardian terraces | Adjoining district to W5, also inside Ealing for basement conversion purposes. |
| W7 | Hanwell | Edwardian villas, 1930s semi-detached | Adjoining district to W5, also inside Ealing for basement conversion purposes. |
| W13 | West Ealing | Edwardian terraces | Adjoining district to W5, also inside Ealing for basement conversion purposes. |
Roof pitch, wall build-up and plot depth change every few W5 streets, and each one changes what a basement conversion can achieve at that address.
Conservation areas covering W5 (Ealing): Ealing Council runs 30, and Acton Green, Hanwell, Ealing Broadway are the ones W5 (Ealing) owners meet most. A basement conversion inside a W5 (Ealing) conservation area loses permitted development, so the W5 (Ealing) submission is a householder application at £258 decided in 8 weeks — not a £120 prior approval decided in 6 weeks. In Hanwell a basement conversion is judged on the street elevation first.
What Article 4 removes near W5 (Ealing): Article 4 for HMOs in specific streets in Acton, Ealing and Southall. Before pricing a basement conversion we check whether the W5 address is inside the mapped area, because Ealing Council draws the W5 (Ealing) boundary street by street rather than across the whole of W5 (Ealing).
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 basement conversion in W5 (Ealing) is scoped against that stock first. Our W5 (Ealing) fixed fee starts at £1,950; the £1,750 Complete package runs the W5 (Ealing) scheme through Ealing Council planning and building control in one go.
Sources for this W5 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.
Free fixed quote in 60 seconds. From £1,950. MCIAT chartered.
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