Mansard Loft Conversion Drawings in Ealing Broadway W5
Fixed-fee, MCIAT-chartered mansard loft conversion drawings for Ealing Broadway (W5) homeowners — London Borough of Ealing validation and local constraints handled from the start.
Ealing Broadway (W5) is the heart of 'Queen of the Suburbs' Ealing, and the housing reflects it — substantial Victorian and Edwardian villas climbing the hill north of the Broadway, with mansion flats and larger subdivided houses nearer the station. The scale of these plots means loft conversions, rear extensions and outbuildings are common, but so is the conservation-area control that shapes them.
Three conservation areas meet across the district: Mount Park on the higher ground to the north, Ealing Common to the east and Ealing Green to the south. Which one a property falls in changes what is achievable on the roof and front elevation, so we establish the boundary and the borough's guidance before recommending a permitted-development or full-application route.
Planning in Ealing Broadway (W5): what to know before you apply
W5 carries no borough-wide Article 4 direction affecting typical householder work, so many Ealing Broadway houses retain permitted development rights for rear and loft projects — but the Mount Park, Ealing Common and Ealing Green conservation areas are the significant exceptions, and the generous villa plots mean extensions are judged closely against neighbouring building and garden lines. London Borough of Ealing does not publish an Article 4 schedule to the national open-data register, so we verify the current position with the council before advising.
Typical Ealing Broadway housing stock
Large late-Victorian and Edwardian villas and semi-detached houses on the hill north of the Broadway, many on generous plots, alongside Edwardian mansion flats and subdivided family houses closer to the station.
Streets we regularly draw for in Ealing Broadway
Mount Park Road · Castlebar Road · The Mall · Grange Road · Uxbridge Road
What W5 is actually built of
Measured from 461 classified residential buildings in W5, not from a description of the area.
Ealing Broadway W5 housing mix
Residential building form across the W5 postcode district, from 461 classified buildings.
| Attached on more than one side | 45% |
|---|---|
| Attached on one side | 42% |
| Detached | 12% |
| Median building footprint | 71 m² |
| Addresses per buildingAbove about 2 means flats and maisonettes dominate | 1.79 |
| Buildings classified | 461 |
Source: Ordnance Survey National Geographic Database (derived statistics). Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Extracted 2026-08-17.
Mansard Loft Conversion Drawings for Ealing Broadway (W5) homes: the package and the process
A mansard is a rebuild of the roof, so the drawings carry more structure than a dormer scheme: the new front and rear slopes with their pitch angles set out, the upstand and party wall junctions, the parapet and gutter detail, and a street-scene elevation showing the new roof against its neighbours.
That street scene usually decides the application. Where a terrace already has approved mansards, the drawing shows the new roof matching their line, pitch and window rhythm; where it would be the first, the case is made on the roof form itself. Either way the argument is drawn, not written.
Mansards belong to terraces and to parapeted stock. The form works because a near-vertical rear wall can rise off the party walls and sit behind a parapet, which is why it is the usual answer in tightly controlled streets and rarely the right answer on a detached house.
What is a mansard loft conversion?
A mansard replaces the rear roof slope — or, less commonly, the front and rear slopes together — with a new near-vertical wall rising from the party walls to a shallow flat roof at the ridge, with small dormer windows set into it. Unlike a dormer, which sits within the existing roof, a mansard changes the shape of the roof itself, which is why it is usually reserved for terraces where the extra headroom and floor area are worth the more involved planning and construction process. Because the new wall runs almost the full width of the house between the party walls, a mansard typically delivers noticeably more usable floor area than a single dormer of any kind, which is why it remains the preferred option on period terraces where every square metre of loft counts.
Does a mansard loft conversion need planning permission in London?
Yes, almost always. Permitted development rights for roof alterations are volume- and shape-limited, and a mansard goes well beyond what those limits allow because it materially alters the roof's profile rather than adding to it. Every mansard we draw is prepared as a full householder planning application, with a design and access statement where the borough requires one, so the council can properly assess the change to the roofline and its impact on neighbours and the street scene.
Why do conservation areas favour mansards?
Many London conservation areas already contain mansard roofs as part of the original streetscape — grand Georgian and Victorian terraces were frequently built with a mansard attic storey behind a parapet, so a matching modern mansard often reads as a restoration of the intended roofline rather than an alteration. Getting that read right depends on matching the existing slate or tile colour, the proportion and spacing of the dormer windows, and the eaves and parapet detailing of the host terrace — details we design in from the first drawing rather than treating as an afterthought.
- Slate or tile colour and coursing matched to the existing roof and neighbouring properties
- Dormer window proportions and spacing aligned to the terrace's existing rhythm
- Eaves, parapet and party wall junctions detailed to sit flush with neighbouring roofs
| Package | Scope | Planning route | Fee from |
|---|---|---|---|
| Rear mansard, planning only | Design, planning drawings and supporting statement | Householder planning | £1,600 |
| Rear mansard, planning and building regs | Planning drawings plus structural and Part L detailing | Householder planning | £2,200 |
| Front and rear mansard | Full roof rebuild on both slopes, with structural | Householder planning | £2,400 |
Mansard Loft Conversion Drawings in Ealing Broadway W5 — FAQs
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