Willesden / Harlesden / Kensal Green — covered by Brent Council.
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Building regulations drawings delivered by an MCIAT chartered team.
Loft conversion drawings delivered by an MCIAT chartered team.
House extension drawings delivered by an MCIAT chartered team.
Mansard roof extensions delivered by an MCIAT chartered team.
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NW10 primarily covers Willesden / Harlesden / Kensal Green in Brent. It also touches Ealing.
Decisions for NW10 are made by Brent Council. Standard Permitted Development rules apply for most rear extensions and loft conversions on terraced and semi-detached houses, unless the property is in a conservation area, is listed, or sits under an Article 4 Direction. Article 4 in Brent: Yes.
Building regs from £950. We do not charge hourly. Free site survey across all NW10 addresses.
From first call to planning decision: typically 12–14 weeks. Site survey week 1, design weeks 2–3, validation 1–2 weeks, statutory 8-week determination. Brent Council timelines align with the national norm.
Willesden / Harlesden / Kensal Green in NW10 is characterised by the housing stock of Brent — broadly edwardian villas in queen's park and mapesbury.

Pick a slot that suits you. No obligation and no sales pressure, just straight answers on your planning route.
Every NW10 postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. NW10 fees below are the statutory England rates for 2026, not drawing package estimates.
| Postcode | Area | Dominant stock | What it means for a drawing package |
|---|---|---|---|
| NW10 | Willesden / Harlesden / Kensal Green | Modern apartments, post-war estates | NW10 straddles a boundary: Willesden / Harlesden / Kensal Green addresses fall to Brent Council or Ealing Council, so confirm which authority validates the drawing package before submitting NW10 drawings. |
| NW10 | Harlesden | Victorian terraces | Harlesden sits inside NW10; drawing package proposals here are determined by Brent Council. |
| NW10 | Kensal Green | Victorian terraces | Kensal Green sits inside NW10; drawing package proposals here are determined by Brent Council. |
| NW10 | Willesden | Victorian terraces, Edwardian terraces | Willesden sits inside NW10; drawing package proposals here are determined by Brent Council. |
| NW10 | Neasden | 1930s semi-detached, post-war | Neasden sits inside NW10; drawing package proposals here are determined by Brent Council. |
| NW10 | Park Royal | Modern apartments, post-war estates | Park Royal sits inside NW10; drawing package proposals here are determined by Ealing Council. |
| NW2 | Cricklewood / Neasden | Edwardian villas and terraces | Adjoining district to NW10, also inside Brent for drawing package purposes. |
| HA0 | Wembley / Sudbury | 1930s semi-detached, new-build | Adjoining district to NW10, also inside Brent for drawing package purposes. |
| HA9 | Wembley / Wembley Park | 1930s semi-detached, new-build | Adjoining district to NW10, also inside Brent for drawing package purposes. |
| W3 | Acton | Victorian and Edwardian terraces | Adjoining district to NW10, also inside Ealing for drawing package purposes. |
| W5 | Ealing | Edwardian villas, Victorian terraces | Adjoining district to NW10, also inside Ealing for drawing package purposes. |
| W7 | Hanwell | Edwardian villas, 1930s semi-detached | Adjoining district to NW10, also inside Ealing for drawing package purposes. |
Roof pitch, wall build-up and plot depth change every few NW10 streets, and each one changes what a drawing package can achieve at that address.
How designation changes a NW10 (Willesden / Harlesden / Kensal Green) drawing package: Brent Council maintains 22 conservation areas, including Kensal Green, Harlesden, Sudbury Court. Inside any of them a NW10 (Willesden / Harlesden / Kensal Green) drawing package cannot rely on permitted development, and the route becomes a £548 householder application determined in 8 weeks rather than a £249 prior approval in 6 weeks. Mapesbury sets the tone for NW10 (Willesden / Harlesden / Kensal Green) casework.
Article 4 and your NW10 (Willesden / Harlesden / Kensal Green) drawing package: Article 4 for HMO conversions in specific streets around Wembley and Harlesden. At a NW10 address that matters twice over, because Brent Council applies the direction unevenly across NW10 (Willesden / Harlesden / Kensal Green) — we read the NW10 (Willesden / Harlesden / Kensal Green) policies map for the exact NW10 address before quoting architectural drawings.
What NW10 (Willesden / Harlesden / Kensal Green) is built from: Edwardian villas in Queen's Park and Mapesbury; Victorian terraces in Kilburn and Harlesden; 1930s semi-detached in Wembley; post-war tower blocks in Church End. Highly diverse borough; Queen's Park and Mapesbury are heritage-controlled; Wembley is a major regeneration hub. That mix decides the drawing package route in NW10 (Willesden / Harlesden / Kensal Green) more than the postcode does, and it is what a Brent Council case officer reads first. A householder application costs £548 paid to Brent Council direct, with 8 weeks to a decision once validated.
How designation changes a NW10 (Willesden / Harlesden / Kensal Green) drawing package: Ealing Council maintains 30 conservation areas, including Bedford Park, Acton Green, Hanwell. Inside any of them a NW10 (Willesden / Harlesden / Kensal Green) drawing package cannot rely on permitted development, and the route becomes a £548 householder application determined in 8 weeks rather than a £249 prior approval in 6 weeks. Pitshanger sets the tone for NW10 (Willesden / Harlesden / Kensal Green) casework.
Article 4 and your NW10 (Willesden / Harlesden / Kensal Green) drawing package: Article 4 for HMOs in specific streets in Acton, Ealing and Southall. At a NW10 address that matters twice over, because Ealing Council applies the direction unevenly across NW10 (Willesden / Harlesden / Kensal Green) — we read the NW10 (Willesden / Harlesden / Kensal Green) policies map for the exact NW10 address before quoting architectural drawings.
What NW10 (Willesden / Harlesden / Kensal Green) is built from: 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. That mix decides the drawing package route in NW10 (Willesden / Harlesden / Kensal Green) more than the postcode does, and it is what a Ealing Council case officer reads first. A householder application costs £548 paid to Ealing Council direct, with 8 weeks to a decision once validated.
Sources for this NW10 drawing package 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.
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