Mansard Roof Extensions · W13 West Ealing
Fixed-fee mansard roof extensions for West Ealing, Drayton Green, Northfields fringe in the W13 postcode, drawn by an MCIAT-chartered architectural technologist and submitted to Ealing Council. Ealing applies standard suburban householder control across W13, with a conservation pocket around Drayton Green.
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.
A mansard roof extension adds a full storey behind a new sloping front face — a strong option on W13's terraces in West Ealing where a standard dormer is too small. Ealing Council scrutinises mansards on townscape and precedent, especially within Drayton Green, Lammas Park (adjoining); we design to the borough's roof guidance with a Heritage Statement where the setting requires it.
West Ealing's most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards that get approved in West Ealing conservation areas — with heritage statements and planning officer negotiation built in.
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 mansard roof extensions 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 mansard roof extensions 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: around £400,000 for a flat and £750,000-£1m for a house — a useful gauge of the build value an extension or loft adds in W13.
Borough character: Leafy outer-west London; Bedford Park conservation area has strict heritage controls; rest of borough generally permissive.
We check against Ealing Council's mansard design guide and design to match the terrace.
Required for West Ealing's conservation areas — demonstrates the mansard respects character and townscape.
Accurate photomontage showing how the mansard sits alongside neighbours — often decisive at Ealing Council committee.
Mansards invariably trigger Party Wall notices in West Ealing's dense terraced streets. Structural package includes new ridge, tie beams, floor joists.
Full liaison with Ealing Council planning officer, committee representation if called in.
Part L thermal, Part B fire (critical on mansards), Part E acoustic separation.
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.
Our fixed fee for mansard roof extensions in West Ealing starts at £1,575 — no hourly billing. With West Ealing property at around £400,000 for a flat and £750,000-£1m for a house, the professional drawing fee is a small fraction of the value the work adds to W13's edwardian and inter-war bay-fronted semis and terraces. 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 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. Article 4 in force in the borough: Yes. 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 mansard roof extensions 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. With West Ealing (W13) property at around £400,000 for a flat and £750,000-£1m 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 £1,575 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 W13 homes.
From £840.
From £840.
From £1,225.
From £1,225.
From £995.
From £1,950.
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 W13 postcode district we draw in, the stock that dominates it and the authority that validates a mansard roof extension there. W13 fees below are the statutory England rates for 2026, not mansard roof extension estimates.
| Postcode | Area | Dominant stock | What it means for a mansard roof extension |
|---|---|---|---|
| W13 | West Ealing | Edwardian terraces | West Ealing sits wholly inside W13, so Ealing Council validates every mansard roof extension submitted from an W13 address. |
| W3 | Acton | Victorian and Edwardian terraces | Adjoining district to W13, also inside Ealing for mansard roof extension purposes. |
| W5 | Ealing | Edwardian villas, Victorian terraces | Adjoining district to W13, also inside Ealing for mansard roof extension purposes. |
| W7 | Hanwell | Edwardian villas, 1930s semi-detached | Adjoining district to W13, also inside Ealing for mansard roof extension purposes. |
Roof pitch, wall build-up and plot depth change every few W13 streets, and each one changes what a mansard roof extension can achieve at that address.
How designation changes a W13 (West Ealing) mansard roof extension: Ealing Council maintains 30 conservation areas, including Pitshanger, Bedford Park, Acton Green. Inside any of them a W13 (West Ealing) mansard roof extension cannot rely on permitted development, and the route becomes a £258 householder application determined in 8 weeks rather than a £120 prior approval in 6 weeks. Bedford Park sets the tone for W13 (West Ealing) casework.
W13 (West Ealing) and Article 4: Article 4 for HMOs in specific streets in Acton, Ealing and Southall. A mansard roof extension planned at a W13 address is checked against that direction first; Ealing Council publishes the W13 (West Ealing) extent, and the W13 line rarely follows the W13 (West Ealing) boundary you would expect.
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 mansard roof extension route in W13 (West Ealing) more than the postcode does. Our fixed fee for mansard roof extensions in W13 (West Ealing) starts at £1,575, against £1,750 for the Complete package that carries a W13 (West Ealing) scheme through Ealing Council planning and building regulations together.
Sources for this W13 mansard roof 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.
Free fixed quote in 60 seconds. From £1,575. MCIAT chartered.
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