Planning Permission in Brent
London Borough in London · Last updated April 2026
Brent is a London Borough in northwest London, stretching from Kilburn and Kensal Rise in the south to Kingsbury and Kenton in the north. The borough is one of London's most diverse, with a mix of Victorian terraces, interwar 'Metroland' semis, and major regeneration areas around Wembley. If you're planning building work in Brent, this guide covers everything from permitted development rights to application fees and local design rules.
Brent has 32 conservation areas and 162 Article 4 direction areas — one of the highest numbers in London. The borough-wide Article 4 direction on HMOs means converting any house to a House in Multiple Occupation always needs planning permission. Many conservation areas also have their own Article 4 directions removing PD rights for householder works. Check your property's status before assuming you can build under permitted development.
Whether you're considering a rear extension, loft conversion, or garden outbuilding, the rules in Brent depend heavily on your location. Read on for the specific rules, fees, and contacts for planning in Brent.
Planning a project in Brent? Start here.
Enter your address to check your permitted development rights, conservation area status, and Article 4 restrictions specific to Brent.
Free check — no account required
What can I build in Brent?
| Project type | Likely permitted development | May need planning permission | Likely needs planning permission |
|---|---|---|---|
| Single-storey rear extension (up to 4m / 8m with prior approval) | Yes, if outside Article 4 and conservation areas | Prior approval if 4–8m (detached) or 4–6m (other) | If in conservation area or Article 4 area |
| Two-storey rear extension (up to 3m deep) | Yes, outside conservation and Article 4 areas | Check distance to boundary ≥7m | If in conservation area or Article 4 area |
| Side extension (up to half width of original house) | Yes, if single storey outside restricted areas | Matching materials required | If two storey, or in conservation/Article 4 area |
| Loft conversion with rear dormer | Yes, outside conservation and Article 4 areas (within 40/50m³) | Check dormer doesn't face highway | If in conservation area, Article 4 area, or flat |
| Outbuilding / summer house | Yes, if ≤50% garden covered and within height limits | Max 2.5m at eaves, 4m ridge (dual pitch) | If in front garden or conservation/Article 4 area |
| New driveway / hardstanding | Yes, if permeable surface or drains to garden | Permeable paving or soakaway | If impermeable and drains to road |
| Solar panels (roof-mounted) | Yes, if not protruding >200mm from roof plane | Check not on listed building | If in conservation area on principal elevation |
| Replacement windows | Yes, like-for-like outside conservation areas | Building regs approval (Part L compliance) | If in conservation area or listed building |
| Garden fence/wall (up to 2m / 1m by highway) | Yes, if within height limits | Check listed building status | If over 2m or next to highway over 1m |
| HMO conversion (C3 to C4) | No — needs planning permission borough-wide | Article 4 applies to all of Brent | Always — Article 4 direction removes PD rights |
This is general guidance based on Brent's planning constraints. Your specific property may differ — use our free PD checker to get a result tailored to your address.
Permitted development in Brent
Permitted development rights in Brent follow the standard national rules — but with major restrictions in conservation areas and Article 4 direction areas. Outside these zones, you can typically build a single-storey rear extension up to 4 metres (or up to 8m with prior approval for detached houses), add a loft conversion, or build a garden outbuilding without planning permission. However, in conservation areas like Mapesbury, Brondesbury, and Queen's Park — and in the many Article 4 areas across the borough — these rights are removed and you'll need planning permission instead. The borough-wide HMO Article 4 direction means converting any dwelling to a small HMO (C3 to C4) always needs planning permission. Use our free planning checker to see what applies to your property.
What Brent expects from your project
Brent's housing stock splits into two broad character zones. The southern neighbourhoods (Kilburn, Kensal Rise, Brondesbury, Willesden) are predominantly Victorian and Edwardian, with red brick and London stock brick terraces and townhouses. The northern areas (Wembley, Kingsbury, Kenton, Sudbury) are classic 'Metroland' — interwar semi-detached houses with mock-Tudor half-timbering, hipped roofs, bay windows, and red clay tiles. Brent's Residential Extensions and Alterations SPD (SPD2, adopted January 2025) and the Design Guide SPD1 set out what the council expects from householder projects. Key principles include maintaining the roofline and proportions of the original building, using matching materials, keeping extensions subordinate, and avoiding harm to neighbours' light and privacy. The council also has a Basement SPD (2017) with specific rules for basement excavations.
Local design guidance
Residential Design Guide SPD
- Brent Design Guide SPD1
Local Plan: Brent Local Plan
The Brent Local Plan was adopted in July 2019 and replaced the UDP (2004) and Core Strategy (2010). The plan allocates land for significant housing growth, particularly along the Wembley and Alperton regeneration corridors. The London Plan (2021) also applies.
Emerging / replacement plan
Brent is undertaking a Local Plan Review with early engagement commenced in 2024.
32 conservation areas
Brent has a high number of conservation areas. Check whether your property falls within one before starting any work — conservation area status significantly restricts what you can do without planning permission.
162 Article 4 directions
Brent has applied Article 4 directions to 162 areas, which remove certain permitted development rights in those zones. Use our free checker to see if your property is affected.
78% approval rate
Brent's planning approval rate is below the national average of 86.9%. If your project needs planning permission, consider pre-application advice before submitting — it significantly reduces refusal risk.
Conservation areas in Brent
32 designated conservation areas
Brent's 32 conservation areas protect neighbourhoods with special architectural or historic character. Key areas include Mapesbury (a remarkably intact Edwardian townhouse estate from 1895–1920), Brondesbury (large Victorian and Edwardian villas), Queen's Park (a unified Victorian layout), Sudbury Court (attractive interwar 'Metroland' planned estate), and Barn Hill (distinctive interwar mock-Tudor and Art Deco houses on a hillside). If your home is in a conservation area, you have fewer permitted development rights. You'll need planning permission for rear dormers, cladding, and certain outbuildings. You'll also need consent before removing or heavily pruning trees. Check Brent's interactive policies map or contact the planning team to confirm your property's conservation area status.
Article 4 directions in Brent
162 Article 4 direction areas
Brent has 162 Article 4 direction areas — making it one of the most restricted boroughs in London for permitted development. The key ones affecting homeowners are: (1) a borough-wide HMO direction removing the right to convert a house to a small HMO without planning permission, (2) conservation area directions in areas like Mapesbury, Brondesbury, Queen's Park, and Northwick Circle removing householder PD rights, and (3) employment land directions preventing commercial-to-residential conversions in industrial areas and town centres. If your property is in an Article 4 area, works that would normally be permitted development — like a single-storey rear extension or loft conversion — will need planning permission. Always check before you start work.
Listed buildings in Brent
There are 93 listed buildings in Brent. If your property is listed, permitted development rights are significantly restricted. Most external and many internal alterations will require listed building consent, which is separate from planning permission. Always check with Brent's conservation team before starting any work on a listed property.
Planning application statistics
Year ending September 2025 | Source: MHCLG planning application statistics
Brent received 2,219 planning applications and decided 2,041 in the year ending September 2025. The approval rate of 78% is below the national average of 86.9%. Major applications are expected to be decided within 13 weeks, while householder and other non-major applications have an 8-week target. The “in time” figures include decisions made within agreed extensions of time.
Brent approved 78% of planning applications in the year ending September 2025 — below the national average of 86.9%. This lower-than-average approval rate reflects the borough's heavily restricted planning environment, with many conservation areas and Article 4 directions. However, the council decided 96% of householder applications within the 8-week target, showing a well-performing service on timeliness. If your application follows Brent's design guidance (especially SPD2 on extensions and alterations), you improve your chances significantly. Consider getting a Lawful Development Certificate if your project is permitted development, or use Brent's pre-application advice service before submitting a full application.
If your project complies with permitted development rules, you don't need to worry about approval rates — a Lawful Development Certificate is a factual assessment, not a judgment call.
Recent planning applications in Brent
Browse what's been approved near you
Seeing what similar projects have been approved near your property can help you understand what Brent expects in terms of scale, materials, and design. It's also useful for gauging how quickly the council processes applications.
Search planning applications on Brent's portal →Data from MHCLG planning application register. Search for householder applications (H01/H02) to see extensions and loft conversions in your area.
Housing delivery in Brent
Housing Delivery Test 2023 measurement | Source: MHCLG
Brent delivered 8,136 homes against a requirement of 6,198 over the three-year measurement period, giving a Housing Delivery Test score of 131%. This is above the 95% threshold, which means there are no government-imposed consequences for housing under-delivery. Planning applications in Brent are assessed on their own merits under standard planning policies.
Lawful Development Certificates in Brent
A Lawful Development Certificate (LDC) is formal confirmation from Brent that your project is lawful under permitted development rules. It is not legally required before you build, but it is the only official document that proves your project did not need planning permission. Most solicitors will ask for one when you come to sell, remortgage, or insure your property.
Brent decided 965 householder applications in the year ending september 2025. Their 8-week performance of 96% is above the national average of 93%, which suggests LDC applications are likely to be processed on time. LDC applications follow the same 8-week statutory determination period as householder planning applications.
How to apply for an LDC in Brent
You can apply for a Lawful Development Certificate through the Planning Portal or directly through Brent's website. You will need to submit:
- A completed application form (available on the Planning Portal)
- A site location plan at 1:1250 or 1:2500 scale
- Existing and proposed floor plans and elevations
- A written description of the proposed works and how they comply with the GPDO 2015
- The application fee of £258
Brent must issue a decision within 8 weeks. If the application is approved, the certificate is a permanent legal record that the development is lawful. If refused, you can appeal to the Planning Inspectorate or amend your project and reapply.
Need help preparing your LDC application?
Our Permitted Development Certificate Report gives you a full PD eligibility assessment, property constraints check, and application checklist tailored to your address and project — so you can apply with confidence.
Check your permitted development rights
Find out instantly whether your project in Brent needs planning permission.
FROM £39Permitted Development Certificate Report
Get a comprehensive report for your Lawful Development Certificate application.
£49Brent Local Authority Report
Approval rates, decision patterns, Article 4 directions, fees & timelines, and council-specific tips for Brent.
Pre-application advice in Brent
Brent offers a pre-application advice service. The fee for householder pre-app advice is Householder pre-app from £188.10 for a meeting. Larger schemes charged under PREAPP 1, 2, and 3 tiers. Revised proposals within 6 months are 50% of the original fee.. You can typically expect a response within 20 working days.
Pre-app advice is worth paying for if your project is borderline, your property is in a conservation area, or your home is a listed building.
Think your project might be permitted development?
Check in 2 minutes with our free tool — no sign-up needed.
Check your PD rights now →Pre-application advice is optional but strongly recommended in Brent, especially if your property is in a conservation area or Article 4 direction area. The service gives you informal feedback from a planning officer before you commit to a full application. Brent also offers Planning Performance Agreements (PPAs) for major schemes of 50+ homes.
Planning fees and timelines in Brent
| Application type | Fee | Typical timeline |
|---|---|---|
| Householder extension/alteration | £528 | 8 weeks |
| Lawful Development Certificate (existing) | £298 | 8 weeks |
| Lawful Development Certificate (proposed) | £264 | 8 weeks |
| Full planning (minor – up to 9 dwellings) | £610 per dwelling | 8 weeks |
| Full planning (major – 10+ dwellings) | £610 per dwelling (1–9 units); £659 per dwelling (10–50 units) | 13 weeks |
| Prior approval (larger rear extension) | £120 | 42 days |
| Listed building consent | Free | 8 weeks |
| Tree works in conservation area | Free | 6 weeks |
Fees are set nationally and correct as of April 2026. Pre-application fees are set by Brent and may change. Building regulations fees are separate — see the building control section below.
Building regulations in Brent
Building regulations approval is separate from planning permission. Most extensions, loft conversions, and structural alterations need building regs approval even if they don't need planning permission.
Building control in Brent is provided by Brent Building Control. You can use Brent's in-house building control team or a private approved inspector. Most extensions, loft conversions, and structural alterations need building control approval even if they don't need planning permission. Where multiple works are done at the same time, Brent caps the total building control charge at £1,500 + VAT. You can also use a private approved inspector instead of the council's service.
| Work type | Typical fee |
|---|---|
| Multiple works on one dwelling (cap) | £1,500 + VAT maximum |
Building control fees depend on project type and size. Where multiple works are done on a single dwelling, Brent caps the total charge at £1,500 + VAT. Contact Brent Building Control for a personalised quote.
Brent planning department
Your building project checklist for Brent
- Check if your property is in a conservation area — Brent has 32 conservation areas. Use our free checker or see the list above.
- Check for Article 4 directions at your address — Brent has 162 Article 4 areas. Check your address.
- Check if your property is listed — search the Historic England list.
- Use our free PD checker to see if your project qualifies as permitted development — Check now.
- Consider a Lawful Development Certificate if PD applies — it protects you when selling. Learn more about LDCs or get your PD Certificate Report.
- Consider pre-application advice if planning permission is needed — see the pre-application section above.
- Check building regulations — most extensions and loft conversions need building regs approval even if they don't need planning permission.
- Check Party Wall Act obligations if building near a boundary — read our Party Wall guide or use our free Party Wall tool.
- Notify your home insurer about planned building work.
- Get at least 3 quotes from builders and check their credentials.
Nearby planning authorities
Stay informed about planning in Brent
Approval rate updates, Article 4 changes, and local planning tips — straight to your inbox.
No spam. Unsubscribe anytime.