BOROUGH

Planning permission in Brent

Wembley regeneration to Queen's Park villas; HMO Article 4 and conservation-area design control.

Conservation areas

Article 4 areas

Average house price

£569,119

12-month change

-1.2%

Constraints: planning.data.gov.uk (ingested 2026-08-01) · Prices: HM Land Registry UK House Price Index, December 2025 · 126 sales in December 2025 · Open Government Licence

Planning in Brent — the detail

Brent runs from the Victorian terraces and villas of Queen's Park, Brondesbury and Mapesbury in the south, through Willesden, Kilburn and Harlesden, to Wembley's towers and the Metro-land suburbs of Sudbury, Kingsbury and Kenton. Its 23 conservation areas include Queen's Park, Mapesbury, Kensal Green and Kensal Rise, Willesden Green, Harlesden, Roe Green Village and Barn Hill — and all of the borough's residential conservation areas are covered by Article 4 directions, so even small external changes in them need planning permission.

Brent's other defining control is its HMO regime: an Article 4 direction confirmed in February 2022 and in force from 1 November 2022 removed the permitted development right to convert a house (use class C3) to a small HMO (C4), so an HMO conversion now needs planning permission across the borough, supported by the council's HMO SPD and Local Plan Policy BH7. The national dataset also records numerous Article 4 directions over the borough's strategic industrial land and site allocations — these are employment-land protections, not householder restrictions. The Residential Extensions and Alterations SPD sets the design bar for home projects.

Outside the conservation areas, much of Brent's terrace and semi-detached stock keeps permitted development rights for rear extensions, side extensions and loft conversions. The address-level check is what separates a permitted-development project from a full application in one of the Article 4 conservation areas — and confirms whether the HMO direction bites.

Policy detail lives in the Brent local plan and applications are submitted via the Brent planning portal.

Reviewed by

Savas Bulduk MRICSDirector, Hampstead Chartered Surveyors & Building Consultancy — RICS-regulated (Firm Reg. 923064)

Conservation areas in Brent

Real · planning.data.gov.uk

Every designated conservation area in Brent from the official dataset — inside one, permitted development narrows and design scrutiny rises.

Barn Hill
Brondesbury
Buck Lane
Harlesden
Homestead Park
Kensal Green
Kensal Rise
Kilburn
Lawns Court
Mapesbury
Mount Stewart
Neasden Village
North Kilburn
Northwick Circle
Paddington Cemetery
Queens Park
Roe Green Village
South Kilburn
St Andrews
Sudbury Cottages
Sudbury Court
Wembley High Street
Willesden Green

Source: planning.data.gov.uk · Open Government Licence. Boundaries are checked at address level by the area report.

Article 4 directions in Brent

Real · planning.data.gov.uk

Brent's Article 4 directions, recorded as around 80 named parcels in the national dataset, fall into three groups: a borough-wide HMO direction (in force since 1 November 2022) removing the right to convert a house to a small HMO; design control across all of the borough's residential conservation areas; and protections on strategic industrial land and site allocations (employment-land, not householder). The Residential Extensions and Alterations SPD sets householder design expectations. Use the area report, or the council's Article 4 register, for the direction that applies at a given address.

Source: planning.data.gov.uk · Open Government Licence · 80 directions recorded. Checked at address level by the area report.

Brent's mapped Article 4 footprint: 89.1% of the borough's area falls inside at least one of its 80 named directions, including at least one that applies borough-wide. See the full London Article 4 Coverage Index →

Brent's householder grant rate: 85.5% of householder applications decided were granted (790 of 924) over 2025 Q2 to 2026 Q1 — rank 16 of 33 for lowest grant rate. London average: 85.6%. See the full householder approval-rate league table →

FIGURES

Key Brent planning figures

Conservation areas	23
Article 4 directions	80
Householder applications granted	85.5% (790 of 924)
London average grant rate	85.6%
Rank for lowest grant rate	16 of 33
Average house price	£569,119
Annual price change	-1.2%

Conservation areas and Article 4 directions: planning.data.gov.uk, ingested 2026-08-01 · Householder approval rates: MHCLG district planning application statistics (PS2), 2025 Q2 to 2026 Q1 · House prices: HM Land Registry UK House Price Index, December 2025 · Open Government Licence. Figures are as published on those dates; a designation missing from the national dataset is a gap in the dataset, not proof it does not exist.

PROJECTS

What gets built in Brent

Rear extension

Terraces in Willesden, Harlesden and Kilburn extend under PD; all of Brent's residential conservation areas carry Article 4 directions, so those need a full application.

Rear extension in Brent →

Side return extension

Common on the terraces of Willesden, Kilburn and Harlesden; Brent's conservation areas all carry Article 4 directions, so those need a full application.

Side return extension in Brent →

Loft conversion

Common across Willesden, Kingsbury and Wembley under PD; Brent's conservation areas (all Article 4) decide dormer form via a full application.

Loft conversion in Brent →

Basement extension

Less common than the inner-west boroughs; a full application with structural and ground-condition evidence is expected, with conservation-area scrutiny on top.

Basement extension in Brent →

Garden room

Workable under PD on many plots; Brent's conservation areas (all Article 4) can remove outbuilding rights — verify the direction.

Garden room in Brent →

DISTRICTS

Brent postcode by postcode

NW2 — Cricklewood & Mapesbury

NW2 takes in the Mapesbury and Willesden Green conservation areas — handsome late-Victorian villa streets where, as across Brent, …

NW2 planning report →

NW10 — Harlesden, Willesden & Kensal Green

NW10 spans the Harlesden, Kensal Green and Kensal Rise conservation areas and the terraces of Willesden. Inside the conservation a…

NW10 planning report →

NW9 — Kingsbury & Colindale

NW9 includes the Roe Green Village conservation area — a planned garden village — and Buck Lane, alongside the Colindale regenerat…

NW9 planning report →

HA9 — Wembley Park & Barn Hill

HA9 is Wembley Park and the Barn Hill conservation area on the slopes above the stadium — a Tudor Walters–era estate of mature gar…

HA9 planning report →

HA0 — Wembley & Alperton

HA0 covers Wembley Central, Alperton and Sudbury — the Sudbury Court and Sudbury Cottages conservation areas among the protected p…

HA0 planning report →

FAQ

Brent planning, asked straight

Do I need planning permission to create an HMO in Brent?

Yes. An Article 4 direction in force since 1 November 2022 has removed the permitted development right to convert a house (use class C3) into a small HMO (C4), so an HMO conversion needs planning permission across the borough, assessed against the council's HMO SPD and Local Plan Policy BH7. This applies whether or not you are in a conservation area.

Is my Brent home in a conservation area?

It may be — Brent has 23 conservation areas, including Queen's Park, Mapesbury, Kensal Green, Kensal Rise, Willesden Green, Harlesden and Roe Green Village. All of the borough's residential conservation areas are covered by Article 4 directions, so even minor external changes need planning permission. Enter your postcode to see the named designation.

Do Article 4 directions affect my Brent extension?

In the conservation areas, yes — all of Brent's residential conservation areas carry Article 4 directions removing permitted development rights, so external alterations there need a full application. Outside them, much of the stock keeps PD rights. Many of the borough's other Article 4 directions cover industrial land, not homes. The address check shows what applies.

Do I need planning permission for a rear extension or loft in Brent?

Outside the conservation areas, much of Brent's terrace and semi-detached stock keeps permitted development rights — a single-storey rear extension within the limits, or a rear-dormer loft within the volume limits, can often proceed under PD or prior approval, to the Residential Extensions and Alterations SPD. Inside a conservation area it is a full application. Check the address first.

How do I check constraints for a Brent address?

Run the postcode through the Planning Permission Checker area report: it checks your coordinates against the official conservation-area and Article 4 geometry for Brent and shows sold-price comparables, each cited to source — so you know the consent route before you commit to drawings.

READ

What applies at your address?

Borough-level rules only narrow it down. Enter a Brent postcode for the live constraint check — conservation area, Article 4 and sold-price comparables, cited to source.

Check a Brent address

Need it in writing for one address? A planning permission report for a Brent property — from £59, or surveyor-reviewed from £295.

Planning Permission Checker provides planning and cost intelligence for early feasibility only. It is not legal, planning, valuation, architectural, structural, or surveying advice. All estimates are indicative and must be verified by qualified professionals before purchase, design, planning submission, or construction.

Cost estimates are indicative only — not a quotation. Final price depends on survey, specification, structure, access, party wall matters, VAT, professional fees, and contractor availability.

Planning outcomes are not guaranteed. Local planning authorities make final decisions.