Wraparound Extension Drawings in Ealing Broadway W5
Fixed-fee, MCIAT-chartered wraparound extension 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.
Wraparound Extension Drawings for Ealing Broadway (W5) homes: the package and the process
A wraparound is assessed as one addition, so the drawings have to present it as one: a single proposed footprint with the rear depth and the side width both dimensioned, the roof drawn as it turns the corner, and the remaining garden shown on the site plan.
The corner is where the technical work sits. Two roof planes and two structural spans meet at the return, drainage has to get round it, and the internal opening is usually wide enough to need a designed frame rather than a single beam. We resolve that junction on the drawings before it becomes a question on site.
A wraparound needs both a rear garden and a side alley, which in practice means a terrace or end-of-terrace with an outrigger. Where only one of the two exists, the honest answer is a rear extension or a side return — the combined footprint has nowhere to turn the corner.
What makes a wraparound extension different from a rear or side return alone?
A rear extension adds depth at the back of the house; a side return adds width down the alley; a wraparound does both at once, so the new floor area turns the corner of the original building rather than sitting against just one wall. The result is typically the largest open-plan space a single-storey extension can deliver, but it also means more of the original external wall is removed and more of the roof is new, which raises the structural and drainage stakes compared with either extension on its own. Homeowners who start out planning a rear extension or a side return alone often move to a wraparound once they see how little extra it costs to combine the two, since much of the groundwork, roof structure and glazing is shared between them rather than duplicated.
Do wraparound extensions need full planning permission in London?
Almost always, yes. Permitted development allowances are calculated on combined additions to the original house, and a wraparound's depth plus width together generally exceed the volume and footprint limits that apply to a rear extension or side extension considered separately. A Lawful Development Certificate route is rarely viable for a genuine wraparound.
Conservation area status and Article 4 directions, common across the terraced streets where wraparound extensions are most popular, remove permitted development rights further still, so we design every wraparound on the assumption it will go through full householder planning.
Structural design for a wraparound extension
Because the new space turns a corner, the structural frame has to work as one continuous system rather than two independent extensions bolted together.
- A continuous steel or ring-beam frame carrying the roof around the internal corner where the rear and side elements meet
- A glazed roof lantern or rooflight strip often placed at the corner junction, where natural light reaches deepest into the combined plan
- Foundations for both the rear and side elements designed together, so they tie into the existing house consistently
- Bi-fold or sliding doors across the rear elevation, coordinated with the side glazing so the two elements read as one space
| Route | What it covers | Typical fee |
|---|---|---|
| Full planning permission | Required for almost all wraparound extensions given the combined footprint | Full Planning pack ~£1,600–£2,400 |
| Planning + Building Regulations (structural) | Combined pack including structural calculations for the L-shaped frame and drainage diversion | Planning + Building Regs pack ~£2,200–£3,850 |
| Rear extension alone (comparison) | Smaller single-storey addition, may qualify for permitted development | see Rear Extension Drawings, from £1,100 |
| Side return alone (comparison) | Widens the kitchen only, keeps garden depth unchanged | see Side Return Extension Drawings, from £1,400 |
Wraparound Extension Drawings in Ealing Broadway W5 — FAQs
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