Ealing's most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards that get approved in Ealing conservation areas — with heritage statements and planning officer negotiation built in.
A mansard roof extensions package in Ealing, where the stock is largely 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, is the full measured-survey-to-submission drawing set London Borough of Ealing needs in order to determine an application: existing and proposed plans, elevations and sections at 1:100 and 1:50, a location and site plan, and the supporting statements the case officer asks for.
Prepared and reviewed by the chartered technologist team at Architectural Drawings London — MCIAT chartered, £2m PI insured.Last reviewed 2026-08-03.
Ealing's most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards that get approved in Ealing conservation areas — with heritage statements and planning officer negotiation built in.
Housing stock in 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.
Character: Leafy outer-west London; Bedford Park conservation area has strict heritage controls; rest of borough generally permissive.
Article 4: Article 4 for HMOs in specific streets in Acton, Ealing and Southall.
We check against Ealing Council's mansard design guide and design to match the terrace.
Required for 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 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 regs submission.
Planning + building regs + structural.
Listed, conservation, complex sites.
Move the controls for an indicative figure. It anchors your budget — it is not a quote. Every project is priced after a free survey.
Build costs are separate and quoted by your contractor. See our published fees.
Every Ealing postcode district we draw in, the stock that dominates it and the authority that validates a mansard roof extension there. Ealing 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 |
|---|---|---|---|
| W4 | Chiswick / Bedford Park | Arts & Crafts villas (listed) | Chiswick / Bedford Park is split at W4. Either Hounslow Council or Ealing Council can determine a mansard roof extension here, so the W4 address is checked against both policies maps first. |
| W3 | Acton | Victorian and Edwardian terraces | Acton is split at W3. Either Ealing Council or Hounslow Council can determine a mansard roof extension here, so the W3 address is checked against both policies maps first. |
| W5 | Ealing | Edwardian villas, Victorian terraces | W5 covers Ealing only; Ealing Council handles the mansard roof extension, and Ealing case officers apply the W5 conservation-area map. |
| W7 | Hanwell | Edwardian villas, 1930s semi-detached | Hanwell sits wholly inside W7, so Ealing Council validates every mansard roof extension submitted from an W7 address. |
| W13 | West Ealing | Edwardian terraces | West Ealing sits wholly inside W13, so Ealing Council validates every mansard roof extension submitted from an W13 address. |
| UB1 | Southall North | Edwardian terraces, post-war flats | UB1 covers Southall North only; Ealing Council handles the mansard roof extension, and Southall North case officers apply the UB1 conservation-area map. |
| UB2 | Southall South | Edwardian terraces, post-war flats | Southall South sits wholly inside UB2, so Ealing Council validates every mansard roof extension submitted from an UB2 address. |
| UB5 | Northolt | 1930s semi-detached, post-war estates | A mansard roof extension at an UB5 address in Northolt is determined by Ealing Council under its own Local Plan policies for Northolt. |
Roof pitch, wall build-up and plot depth change every few Ealing streets, and each one changes what a mansard roof extension can achieve at that address.
Conservation areas covering Ealing: Ealing Council runs 30, and Acton Green, Hanwell, Ealing Broadway are the ones Ealing owners meet most. A mansard roof extension inside a Ealing conservation area loses permitted development, so the Ealing submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Bedford Park a mansard roof extension is judged on the street elevation first.
What Article 4 removes near Ealing: Article 4 for HMOs in specific streets in Acton, Ealing and Southall. Before pricing a mansard roof extension we check whether the W3 address is inside the mapped area, because Ealing Council draws the Ealing boundary street by street rather than across the whole of Ealing.
Ealing 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 mansard roof extension route in Ealing — 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 Ealing 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.
Direct answers to the questions Ealing homeowners ask every week about mansard roof extensions.
Start a free quote →Mansards in Ealing are less common historically — Ealing Council considers each application on its merits. Rear mansards on suitable terraced or semi-detached properties, matching the roofscape, have a reasonable approval rate with the right design and supporting heritage commentary where relevant.
A 70° front slope is typical for Ealing mansards — steep enough to maximise floor area while reading as a roof rather than a full additional storey. Front dormers should be small and symmetrical. Ealing Council's design guide (where published) takes precedence on detail.
Often yes, but Ealing Council favours applications supported by wider street precedents. Where mansards already exist nearby in Ealing, approval is far more likely. We review street precedents at the feasibility stage.
A Ealing mansard carries more design work than a dormer — heritage statement, street-elevation massing and conservation-led detailing on top of planning, building regulations and structural calculations. Build cost then varies with size, roof geometry and site access. Our design fee is fixed before we start; see our fees.
Full-height — typically 2.3–2.5m ceiling from the new floor. Unlike a dormer, which gives partial head height, a mansard provides a complete additional storey within Ealing's victorian and Edwardian villas in Ealing central terraced context.
We cover all Ealing postcodes — W3, W5, W7, W13, UB1, UB2, UB5, UB6, NW10 — and have submitted mansard applications across the borough. Our heritage statement and design-and-access statement are included in every mansard package.
Ealing's victorian and Edwardian villas in Ealing central terraced stock is the natural context for mansard extensions — they were originally designed for Victorian and Edwardian rows. Feasibility depends on street precedent, conservation area status and party wall implications. We assess all three at the free site visit.
A mansard adds a full upper storey — typically 35–45m² of usable floor space. In Ealing this often converts a 3-bed house to 4 or 5 beds. The steep front slope (70°) and flat top read as a roof, not a full floor, which is why Ealing Council accepts them more readily than a simple box extension.
If your property sits on a boundary, here are the neighbouring options.
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