Planning Permission in Brentwood
Non-Metropolitan District in East of England · Last updated April 2026
Brentwood is a prosperous borough on the Essex-London border, characterised by its extensive Green Belt, historic high street, and attractive villages. With 89% of the borough designated as Green Belt, Brentwood is one of the most constrained authorities in Essex for new development.
The borough's 13 conservation areas and 520 listed buildings reflect its long history as a stop on the old London to Colchester road. From the medieval chapel of St Thomas to the Victorian and Edwardian suburbs, Brentwood combines historic character with strong commuter demand.
The council manages significant development pressure within tight Green Belt boundaries, focusing growth on the town centre and selected sustainable locations identified in the Local Plan.
Planning a project in Brentwood? Start here.
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What can I build in Brentwood?
| Project type | Likely permitted development | May need planning permission | Likely needs planning permission |
|---|---|---|---|
| Rear extension (single storey) | Most of Brentwood outside protected zones | Properties near boundaries or Green Belt fringe areas | Conservation areas (13), listed buildings |
| Rear extension (two storey) | Most of Brentwood outside protected zones, if within 3m limit | Check distance to boundary ≥7m or Green Belt fringe areas | Conservation areas (13), listed buildings |
| Side extension | Detached houses outside protected zones | Semi-detached properties (half-width rule) | Conservation areas (13), listed buildings |
| Loft conversion (dormer) | Houses outside conservation areas | Properties on prominent corners or Green Belt fringe areas | Conservation areas, listed buildings, flats |
| Loft conversion (Velux/rooflight) | Most of Brentwood | Front-facing rooflights in conservation areas | Listed buildings |
| Outbuilding / garden office | Most of Brentwood outside protected zones, if within size/height limits | Large outbuildings covering >50% of garden | Conservation areas (side or front), listed buildings, Green Belt |
| Porch | Most properties if within 3m² and 3m height | Properties near highway boundary | Conservation areas with restrictions, listed buildings |
| Solar panels | Most properties (roof-mounted) | Panels protruding beyond roofline | Listed buildings, conservation areas (if visible from road) |
| Driveway / hard standing | If using permeable surfacing | Non-permeable surfacing over 5m² | Conservation areas with specific restrictions |
| Garage conversion | Most of Brentwood (internal works) | If changing external appearance significantly | Listed buildings |
This is general guidance based on Brentwood's planning constraints. Your specific property may differ — use our free PD checker to get a result tailored to your address.
Permitted development in Brentwood
Brentwood has no Article 4 directions, so permitted development rights are not formally restricted beyond conservation areas. However, with 89% of the borough in the Green Belt, the most significant constraint for many householders is Green Belt policy rather than heritage designations. Properties in the Green Belt face strict limits on extension sizes. The 13 conservation areas cover the historic cores of Brentwood, Shenfield, and the rural villages.
What Brentwood expects from your project
Local design guidance
Residential Design Guide SPD
- Brent Design Guide SPD1
Local Plan: Brentwood Local Plan 2016–2033
Brentwood Borough adopted its Local Plan in March 2022 following a lengthy examination. The plan provides for around 7,600 new homes, including the Dunton Hills Garden Village strategic allocation, and significant employment growth linked to the borough's position on the M25 and Elizabeth line corridor.
Emerging / replacement plan
The Brentwood Local Plan was recently adopted. The council will monitor delivery through annual monitoring reports and undertake a review at the appropriate stage.
Conservation areas in Brentwood
13 designated conservation areas
Brentwood's 13 conservation areas protect the historic character of the town centre, surrounding villages, and key heritage areas. Brentwood High Street conservation area covers the medieval and Georgian core of the town. Villages like Ingatestone, Kelvedon Hatch, and Blackmore have distinct conservation areas protecting their rural character. The conservation area appraisals provide guidance on acceptable development within these protected areas.
Article 4 directions in Brentwood
1 Article 4 direction area
Listed buildings in Brentwood
There are 520 listed buildings in Brentwood. 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 Brentwood's conservation team before starting any work on a listed property.
Planning application statistics
Year ending September 2025 | Source: MHCLG planning application statistics
Brentwood received 747 planning applications and decided 706 in the year ending September 2025. The approval rate of 84.4% 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.
Brentwood's 84.4% approval rate reflects careful management of development within extensive Green Belt. The 97% on-time rate for householder decisions and 98% delegation rate show efficient processing. With 747 applications received and 706 decisions made, the borough manages moderate development pressure.
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 Brentwood
Browse what's been approved near you
Seeing what similar projects have been approved near your property can help you understand what Brentwood expects in terms of scale, materials, and design. It's also useful for gauging how quickly the council processes applications.
Search planning applications on Brentwood'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 Brentwood
Housing Delivery Test 2023 measurement | Source: MHCLG
Brentwood delivered 1,035 homes against a requirement of 802 over the three-year measurement period, giving a Housing Delivery Test score of 129%. This is above the 95% threshold, which means there are no government-imposed consequences for housing under-delivery. Planning applications in Brentwood are assessed on their own merits under standard planning policies.
Lawful Development Certificates in Brentwood
A Lawful Development Certificate (LDC) is formal confirmation from Brentwood 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.
Brentwood decided 433 householder applications in the year ending september 2025. Their 8-week performance of 97% 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 Brentwood
You can apply for a Lawful Development Certificate through the Planning Portal or directly through Brentwood'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
Brentwood 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 Brentwood needs planning permission.
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Approval rates, decision patterns, Article 4 directions, fees & timelines, and council-specific tips for Brentwood.
Pre-application advice in Brentwood
Brentwood offers a pre-application advice service. The fee for householder pre-app advice is Varies by proposal type.
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 →Brentwood offers pre-application advice for householder and larger developments. Written responses are provided within agreed timescales.
Planning fees and timelines in Brentwood
| Application type | Fee | Typical timeline |
|---|---|---|
| Householder planning application | £528 | 8 weeks |
| Full planning permission | £610 per dwelling | 8-13 weeks |
| Lawful Development Certificate (proposed) | £264 | 6-8 weeks |
| Lawful Development Certificate (existing) | £298 | 6-8 weeks |
| Listed building consent | Free | 8 weeks |
| Prior approval | £120 | 56 days |
| Discharge of conditions | £145 per request | 8 weeks |
| Non-material amendment | £44 | 28 days |
Fees are set nationally and correct as of April 2026. Pre-application fees are set by Brentwood and may change. Building regulations fees are separate — see the building control section below.
Building regulations in Brentwood
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 Brentwood is provided by Brentwood Borough Council Building Control. You can also use a private approved inspector instead of the council's service.
Building control contact
Brentwood planning department
Your building project checklist for Brentwood
- Check if your property is in a conservation area — Brentwood has 13 conservation areas. Use our free checker or see the list above.
- Check for Article 4 directions at your address — Brentwood has 1 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
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