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Free 2026 London Planning Report — Sudbury HA0

Attic bedroom under a pitched ceiling with two roof windows, a double bed and bedside lamps
HA0 · Sudbury · Brent

Planning and building regulation drawings in Sudbury (HA0)

HA0 is Sudbury, and it is a district of interwar semi-detached and detached houses laid out in the 1930s. The Sudbury Court estate in north Wembley keeps much of that original character: bay windows, front gardens and consistent building lines, with Barham Park close by. Recorded streets include Sudbury Court Drive, Elms Lane, Harrowdene Road and Byron Road. The homeowner projects we draw for houses of this type are the familiar ones: a deeper kitchen at the back, a loft room within the existing roof, or a side addition that has to sit comfortably beside the matching house next door.

  • MCIAT chartered technologists
  • London Borough of Brent granted 85% of 924 householder applications
  • Drawings in about 7 days

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What decides the route for those projects is whether the house is inside the Sudbury Court Conservation Area. Brent has made an Article 4 direction there that brings front-facing alterations, such as windows, doors, roofs and boundary walls, under planning control, so a change of design or material on the street side can need an application. A genuine like-for-like repair is not development and is unaffected. In a conservation area the permitted development rules also exclude roof enlargements, side extensions and rear extensions of more than one storey, so a dormer loft or a two-storey rear wing goes in as a planning application rather than proceeding as permitted development.

Outside the conservation area, a house keeps its permitted development rights within the national limits, and a flat has none. Where an application is needed anywhere in HA0, the roofscape and bay-window rhythm of the pairs shape what a good design looks like. Before drawing anything for an HA0 address we establish whether the house falls inside the conservation area and which rights the direction removes, because that settles the route before any design time is spent.

Planning in Sudbury: what to know before you apply

Every householder application to Brent needs a site location plan and the existing and proposed drawings that describe the work, with an ownership certificate or notice. Inside a conservation area the council also looks for a description of how the proposal affects the area's significance, so we prepare that alongside the drawings. Brent's borough record lists a direction across the whole borough that takes away the permitted change from a family house to a small HMO, and further directions that restrict some permitted development inside certain conservation areas, Sudbury Court among them. Where an extension needs permission here, officers weigh how it respects the interwar semi character, the established building line and the living conditions of neighbours. We check each of these points for the address before the drawings start.

Applications are decided by London Borough of Brent — its planning pages.

Check your route

Does your Sudbury project need planning permission?

Route check · Sudbury (HA0)

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

Sudbury (HA0) in numbers

What London Borough of Brent has decided, and what HA0 is built of — the two facts that shape every job here.

Householder planning decisions — London Borough of Brent

Sudbury (HA0) applications are decided by London Borough of Brent; these are its published householder figures for the last four quarters.

Householder applications decided2025 Q2 to 2026 Q1924
Granted790
Refused134
Grantedof 924 decisions · England 90%85%
Decided within 8 weeksof 690, excluding prior approvals98%

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 — London Borough of Brent

How the larger-home-extension route has fared with London Borough of Brent, which decides HA0 notifications.

Larger home extension prior approvals — not required2024 Q2 to 2026 Q1335
Prior approval granted15
Prior approval refused174
Grantedof 189 determined8%

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

Planning appeals — London Borough of Brent

Refusals in HA0 can be appealed to the Planning Inspectorate; this is London Borough of Brent's householder appeal record.

Householder appeals determined2021–2026283
Allowed118
Allowedof 283 · England 36%42%

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

Conservation areas and Article 4 directions — London Borough of Brent

Register counts for London Borough of Brent. A count describes what the council has published, never a rank against another council.

Conservation areas in the register22 dated, 1968–202423
Article 4 directions in the register39
Areas covered by an Article 4 direction162

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

What HA0 is built of

Residential building form across Sudbury (HA0), from 236 classified buildings — the fact that decides party walls, side returns and loft headroom before any policy does.

Attached on more than one side41%
Attached on one side53%
Detached6%
Median building footprint68 m²
Addresses per buildingAbove about 2 means flats and maisonettes dominate1.35
Buildings classified236

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.

  1. Day 0Measured survey of your Sudbury property — or your existing plans if you have them.
  2. About 7 daysDrawings issued for your approval. Free redraws until you are happy.
  3. SubmissionWe validate against London Borough of Brent’s checklist and submit on your behalf.
  4. Council: 8-week targetHouseholder applications carry an 8-week statutory target. London Borough of Brent decided 98% of 690 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 HA0

Sudbury1930s interwar semi-detached
Nearby

Nearby postcode districts

Wembley Park HA9Harrow on the Hill HA1Canons Park HA8Rayners Lane HA2Stanmore HA7Wealdstone HA3Pinner HA5
FAQ

Sudbury (HA0) — FAQs

Does the Sudbury Court Conservation Area mean I cannot extend my house?+
No. It changes the route and the level of design care. Because of the conservation status, a loft enlargement, a side extension or a rear extension of more than one storey needs a householder application. The Article 4 direction adds street-facing alterations to windows, doors, roofs and boundary walls where they change the design or material. A single-storey rear extension within the limits may still be permitted development, subject to the rights the direction removes.
Can I turn my Sudbury semi into a house share?+
A house shared by three to six unrelated people is a small HMO, and Brent records a borough-wide direction that brings that change of use under planning control. That means an application before the change is made. We confirm the position for the address, and we can draw the layout once the permission question is settled.
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