The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical phase, ideal for victorian and Edwardian villas in Ealing central typical of Ealing.
Ealing approved 86.6% of the householder applications it decided in the three years to March 2026 — 2,755 of 3,182 — against a London average of 83.0%, and settled 98.6% of them inside the statutory eight weeks. It also recorded 2,048 lawful development certificates over the same period, so a great many Ealing extensions never needed permission at all. The number worth knowing before you commit to a large rear extension is a different one: of 891 larger-householder prior approvals determined here, Ealing refused 27.3%. That is slightly above the London figure of 24.9%, and a long way from either extreme — Kingston upon Thames refuses 49.4% of them, Southwark 7.4%. Roughly one in four goes back, so the 6m extension that a neighbour built in another borough is not a precedent here.
| Measure | Ealing | Outcome |
|---|---|---|
| Householder decisions | 3,182 | 86.6% approved |
| Decided inside eight weeks | 98.6% | 2nd fastest of the 33 boroughs |
| Lawful development certificates issued | 2,048 | — |
| Larger-extension prior approval notifications | 891 | 594 ruled ‘not required’, 54 granted, 243 refused |
| Extension applications in the Datahub | 27,214 | 58% approved |
| Householder appeals decided | 396 | 37.4% allowed, median 71 days |
Sources: rows one to four from MHCLG District Planning Application Statistics (PS1 and PS2), decisions made in the twelve quarters to March 2026, Open Government Licence v3.0. Row five from the Planning London Datahub, retrieved 15 August 2026, which phrase-matches published descriptions and is comparable within Ealing only. Row six from Planning Inspectorate casework decided 2016–2026. A ‘prior approval not required’ ruling means the work may proceed.
For Ealing homeowners in 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, a house extension drawings package 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 architectural technologist team at Architectural Drawings London — CIAT Affiliate, professional indemnity insured.Last reviewed 2026-08-03.
The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical phase, ideal for victorian and Edwardian villas in Ealing central typical of Ealing.
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: named streets in Acton, Ealing and Southall have had the right to convert a house into an HMO withdrawn by direction, and the borough's contravention-notice volume suggests conversions done without consent there tend to be found rather than missed.
We measure the house, photograph it, and run the Article 4 and conservation checks against your exact address before the quote goes out. Ealing carries 31 conservation areas — Ealing Common, Ealing Green, Creffield and the Cuckoo Estate among the largest — and which side of a designation boundary you sit on changes the route, not just the paperwork.
Two or three worked layouts at concept stage, so glazing, roof form and the kitchen position are settled before a single application drawing is produced.
Location plan, existing and proposed floor plans, every affected elevation, sections, and a design and access statement wherever Ealing asks for one.
Steel beam, foundation, lintel design. Chartered engineer sign-off.
Party wall notices drafted wherever the extension touches a shared boundary, and a Thames Water build-over agreement where you are digging within 3m of a public sewer.
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 site survey.
Build costs are separate and quoted by your contractor. See our published fees.
Every Ealing postcode district we draw in, the housing type that dominates it, and the authority that validates an extension there. The fees in this table are the statutory England rates for 2026 — £548 for a householder application — and not our drawing fee.
| Postcode | Area | Dominant stock | What it means for a house extension |
|---|---|---|---|
| UB5 | Northolt | 1930s semi-detached, post-war estates | UB5 covers Northolt only; Ealing Council handles the house extension. |
| UB6 | Greenford / Perivale | 1930s semi-detached | Greenford and Perivale lie wholly in Ealing. UB6 work is judged against the borough's Local Plan, with no second authority involved at any point. |
| NW10 | Willesden / Harlesden / Kensal Green | Modern apartments, post-war estates | NW10 is shared ground between Brent and Ealing. Harlesden and Kensal Green streets fall either side of the line, so we confirm the determining authority from the exact address before drawing. |
| W4 | Chiswick / Bedford Park | Arts & Crafts villas (listed) | Chiswick and Bedford Park straddle the Hounslow border inside W4. Two policies maps cover the district, and only the precise address settles which council validates the application. |
| W3 | Acton | Victorian and Edwardian terraces | Acton is divided. A W3 property may answer to Ealing or to Hounslow depending on the street, and the two councils apply different local policy to the same rear extension. |
| W5 | Ealing | Edwardian villas, Victorian terraces | W5 is Ealing proper. No neighbouring authority has any claim on a W5 address, and only the borough's own designation map is opened when a case officer assesses one. |
| W7 | Hanwell | Edwardian villas, 1930s semi-detached | Hanwell is undivided. The whole of W7 falls to Ealing, which is why a W7 submission never needs a boundary check before it goes in. |
| W13 | West Ealing | Edwardian terraces | West Ealing sits entirely within the borough boundary, so a W13 extension is validated, consulted on and decided by Ealing Council alone. |
Roof pitch, wall build-up and plot depth shift every few streets in Ealing, and each of those shifts changes what an extension can achieve at one address rather than at the one next door.
Thirty conservation areas cover parts of Ealing, Hanwell, Ealing Broadway and Pitshanger among them, and designation changes the route rather than the answer. Outside one, a compliant rear extension can often go through prior approval: £249, six weeks. Inside one, permitted development is withdrawn and the same extension needs a full householder application at £548 with eight weeks to decide. Pitshanger is the designation that most often changes an Ealing design, because its interwar frontages were built as a set and the council reads alterations against that set rather than against the individual house.
Ealing and Article 4: Article 4 for HMOs in specific streets in Acton, Ealing and Southall. A house extension planned at a W3 address is checked against that direction first; Ealing Council publishes the Ealing extent, and the W3 line rarely follows the Ealing boundary you would expect.
The building fabric around 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 house extension in Ealing is scoped against that stock first, because it decides whether the scheme runs as permitted development, a £274 Lawful Development Certificate, or a full £548 application to Ealing Council.
Sources for this Ealing house 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.
Ealing is an ordinary borough to be refused in, and that is worth knowing before you budget for a fight. Of 396 householder appeals decided here between 2016 and 2026, 148 were allowed and 237 dismissed — 37.4% successful against a London figure of 39.0%. The eleven remaining cases were split decisions, allowed in part, which is the outcome people forget is available: an inspector can accept the principle of your extension and still strike out the element that caused the refusal. On these numbers roughly three refusals in eight are reversed, so an Ealing refusal is neither a formality to appeal nor a verdict to accept without reading the officer's reasoning first.
Half of those Ealing appeals took more than 71 days to decide, counted from the day the appeal opened — and that clock only starts once the council's own determination period has already run, which is the whole case for getting the application right first time. 35 of them, or 8.8%, involved a conservation area, so heritage argument carries real weight across the borough's 31 designations. And 99.7% were settled on written representations rather than at a hearing or inquiry: the written case and the drawings were the entire body of evidence the inspector ever saw.
Drawn from 396 householder appeals decided in Ealing. Source: Planning Inspectorate casework records, reused under OGL v3.0.
The questions Ealing homeowners actually put to us, answered from the borough's own return rather than from general advice.
Start a free quote →Ealing issued 210 planning enforcement notices in the twelve quarters ending March 2026, against an average of 108 for a London borough over the same period (MHCLG planning statistics, retrieved 1 September 2026). It also served 231 planning contravention notices and 19 breach of condition notices. That is a council which checks what has actually been built, so the permitted-development question is worth settling on paper before anyone orders steel: a single-storey rear addition of 3m on an attached house or 4m on a detached one, and a side return no wider than half the original house, stays permitted only where the street carries no Article 4 Direction and the property is not a flat, a listed building or inside a conservation area. We test the address against each of those before quoting.
Prior approval is not a formality in Ealing. The council determined 891 larger householder extensions and refused 243 of them — 27.3%, against 24.9% for the 33 boroughs pooled (MHCLG PS1, financial years 2023-24 through 2025-26). Standard permitted development gives you 3m off the back of an attached house, or 4m off a detached one, with no application at all. Stretching to 6m or 8m puts you on the neighbour-consultation route, and the outcomes there split three ways. On 594 the council decided no prior approval was needed at all; a further 54 it approved after consulting the neighbours; 243 it refused. Flats, listed buildings and Article 4 areas sit outside these rights entirely.
An Ealing extension carries two separate costs. Ours is the architectural package: planning drawings, building regulations drawings and structural calculations, quoted as a single fixed figure. The other is the build, which contractors price per square metre and which moves with access, ground conditions and specification. A side return generally costs less per square metre than a double-storey rear. For scale, the median Ealing sale in 2025 was £532,750, with a quarter of transactions above £765,000 (HM Land Registry Price Paid, 2025 completions) — that spread, more than anything else, is what a sensible build budget gets set against. See our fees.
Ealing sets no basement policy of its own beyond the national framework, so a basement conversion here turns on structure, drainage and flood risk rather than on a borough rulebook. Flood Zone 3 covers 4.45% of the borough's land, concentrated along the Brent and the canal (Environment Agency flood map extents). A site inside that extent does not mean the house floods — the zones are drawn as if no defences existed — but it does determine that a Flood Risk Assessment must accompany the application. A Thames Water build-over agreement applies where you excavate within 3m of a public sewer.
Victorian terraces around Ealing Broadway and Northfields usually suit both moves at once. A side return infills the narrow passage down the side and widens the kitchen; a rear extension pushes into the garden and lengthens it; a wraparound does both, which is where most of these projects settle. Houses built before 1919 make up 28.3% of Ealing's 149,870 dwellings as at 31 March 2025 (VOA CTSOP4.1), so this is ordinary ground in the borough rather than a special case. We recommend the option that fits at the free site visit.
Ealing's victorian and Edwardian villas in Ealing central terraced and semi-detached stock typically suits rear single-storey extensions (kitchen-diners), side-return infill extensions, or double-storey rear. Wraparound extensions combine both directions for maximum gain. We recommend the most viable option at the free site visit.
We cover all Ealing postcodes — W3, W5, W7, W13, UB1, UB2, UB5, UB6, NW10 — with local surveyors. Survey appointments within 3 working days.
Ealing works to the London Plan and to its own Local Development Framework. Materials are expected to match or complement what stands there now, neighbour amenity is assessed on daylight and overlooking, and Part L governs the fabric. Where a property has a tangled planning history — an earlier refusal, a lapsed consent, an outstanding condition — we fold a pre-application advice summary into the package rather than guessing at the officer's view.
Ealing shares a boundary with five other authorities, and an address sitting on one of those lines can be validated by either side. The neighbouring pages:
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