A row of red-brick houses and mansion flats with bay windows, a balcony and brick garden walls beside a tree-lined road.

W9 · Maida Vale · Westminster

Planning and building regulation drawings in Maida Vale (W9)

Maida Vale is a place where most people live in a flat. Red-brick Edwardian mansion blocks line the main avenues, and the side streets hold wide late-Victorian stucco villas. Elgin Avenue, Sutherland Avenue, Randolph Avenue and Warwick Avenue are among the district's roads. The great majority of homes are held as flats rather than whole houses, so alongside the council's view there is always a second question: whether the building's owner will agree.

MCIAT chartered technologists
Westminster City Council granted 81% of 418 householder applications
Drawings in about 7 days

That changes what a typical project looks like. Interior reconfigurations, opening up a kitchen, rebuilding a bathroom, converting a lower-ground flat or adding a rooflight where the lease allows are the kinds of work flat owners consider. A flat in a mansion block carries no permitted development rights at all, so even work that is small in scale needs the freeholder's consent and, where it affects the outside, planning permission as well.

The Maida Vale conservation area covers the mansion blocks and the stucco villas, and its protected features are the uniform frontages and the roofline. Any change that alters those frontages or the roofline is assessed against that consistency. Basements are a separate sensitive subject. We begin by finding out what kind of building you are in and what the lease says, because those two answers fix the route before any design is drawn.

Planning in Maida Vale: what to know before you apply

Westminster's approach in W9 is shaped by the conservation area and by the fact that so much of the housing is flats. A full planning application is usually the starting point for external changes, and listed building consent is added where a building carries a listing. Basements are covered by an Article 4 direction removing permitted development rights, so lower-ground excavation needs planning permission and, under the City Plan basement policy, which limits scale, a basement impact assessment. A planning application needs an ownership certificate or notice, and a mansion-block lease may separately require the freeholder's consent. We resolve ownership and consent questions first, then draw to the conservation area's expectations for frontages and rooflines.

Applications are decided by Westminster City Council — its planning pages.

Check your route

Does your Maida Vale project need planning permission?

Route check · Maida Vale (W9)

ProjectProperty

Listed building?

Conservation area?

Likely permitted development — no planning applicationNeeds checking

A single-storey rear extension up to 4 m deep on a detached house, or 3 m on any other house, is Class A permitted development subject to the height and materials conditions.
An Article 4 direction applies here and may withdraw this freedom — the schedule must be checked before relying on it.
One or more constraints are unknown — we check the council's registers as part of the free appraisal.
Where permitted development applies, a lawful development certificate proves it for lenders and buyers.

Sources: GPDO 2015, Schedule 2, Part 1 · Planning Portal — common projects · Building Regulations 2010 — when approval is needed

This is a first-pass indication from the national rules, not planning advice for your property. Your council's registers, any Article 4 schedule and the exact dimensions decide it — the free appraisal checks all three before we recommend a route.

Confirm it with a free appraisal

Maida Vale (W9) in numbers

What Westminster City Council has decided, and what W9 is built of — the two facts that shape every job here.

Householder planning decisions — Westminster City Council

Maida Vale (W9) applications are decided by Westminster City Council; these are its published householder figures for the last four quarters.

Householder applications decided2025 Q2 to 2026 Q1	418
Granted	340
Refused	78
Grantedof 418 decisions · England 90%	81%
Decided within 8 weeksof 230, excluding prior approvals	79%

Source: Ministry of Housing, Communities and Local Government (PS2 district planning application statistics). Open Government Licence v3.0 Extracted 2026-09-22.

Permitted development prior approvals — Westminster City Council

How the larger-home-extension route has fared with Westminster City Council, which decides W9 notifications.

Larger home extension prior approvals — not required2024 Q2 to 2026 Q1	0
Prior approval granted	0
Prior approval refused	0

Source: Ministry of Housing, Communities and Local Government (PS1 district planning application statistics). Open Government Licence v3.0 Extracted 2026-09-22.

Planning appeals — Westminster City Council

Refusals in W9 can be appealed to the Planning Inspectorate; this is Westminster City Council's householder appeal record.

Householder appeals determined2021–2026	124
Allowed	44
Allowedof 124 · England 36%	35%

Source: Planning Inspectorate appeals casework. Open Government Licence v3.0 Extracted 2026-09-22.

Conservation areas and Article 4 directions — Westminster City Council

Register counts for Westminster City Council. A count describes what the council has published, never a rank against another council.

Conservation areas in the register56 dated, 2008–2010	56
Article 4 directions in the register	10
Areas covered by an Article 4 direction	10

Source: MHCLG Planning Data Platform. Open Government Licence v3.0 Extracted 2026-09-22.

What W9 is built of

Residential building form across Maida Vale (W9), from 224 classified buildings — the fact that decides party walls, side returns and loft headroom before any policy does.

Attached on more than one side	78%
Attached on one side	20%
Detached	2%
Median building footprint	82 m²
Addresses per buildingAbove about 2 means flats and maisonettes dominate	4.99
Buildings classified	224

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 2026-09-22.

Day 0Measured survey of your Maida Vale property — or your existing plans if you have them.
About 7 daysDrawings issued for your approval. Free redraws until you are happy.
SubmissionWe validate against Westminster City Council’s checklist and submit on your behalf.
Council: 8-week targetHouseholder applications carry an 8-week statutory target. Westminster City Council decided 79% of 230 recent householder applications inside it.

Source: Ministry of Housing, Communities and Local Government (PS2 district planning application statistics). Open Government Licence v3.0 Extracted 2026-09-22.

Neighbourhoods

Streets and neighbourhoods in W9

Maida Valepredominantly late-Victorian and Edwardian

Nearby

Nearby postcode districts

Kensington W8North Kensington W10Hanwell W7Notting Hill W11Hammersmith W6Shepherds Bush W12Ealing Broadway W5West Ealing W13

FAQ

Maida Vale (W9) — FAQs

Do I need planning permission to change the windows in my mansion block flat?+

Probably, if the change is visible from outside. Flats have no permitted development rights, and in the Maida Vale conservation area the uniform frontages are a protected feature, so replacement windows that alter the look of the elevation are likely to need consent. The freeholder or management company will usually need to agree too.

Can I convert my lower-ground flat in Maida Vale into something larger?+

Possibly, but an excavation is controlled by the basement Article 4 direction and needs a full application with a basement impact assessment. Work that stays within the existing footprint is a different question. We check which applies and what your lease allows before drawing anything.

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