Planning Permission in Buckinghamshire
Unitary Authority in South East · Last updated April 2026
Buckinghamshire is a large unitary authority combining the former districts of Aylesbury Vale, Chiltern, South Bucks, and Wycombe. With 186 conservation areas, 389 Article 4 directions, extensive Green Belt, and 5,880 listed buildings, it is one of the most heritage-constrained planning authorities in England.
The council handles nearly 5,000 applications annually with an 83.3% approval rate. Buckinghamshire's planning landscape ranges from the Chiltern Hills AONB to the Vale of Aylesbury, with intense development pressure from London's commuter belt in the south and east.
Homeowners should consult the local plan for their area. The combination of Green Belt, AONB, conservation areas, and 389 Article 4 directions creates one of England's most complex PD landscapes.
Planning a project in Buckinghamshire? Start here.
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What can I build in Buckinghamshire?
| Project type | Likely permitted development | May need planning permission | Likely needs planning permission |
|---|---|---|---|
| Rear extension (single storey) | Only outside conservation areas and Article 4 zones | Properties near boundaries or Green Belt fringe areas | Conservation areas (186), Article 4 zones (389), listed buildings |
| Rear extension (two storey) | Only outside conservation areas and Article 4 zones, if within 3m limit | Check distance to boundary ≥7m or Green Belt fringe areas | Conservation areas (186), Article 4 zones (389), listed buildings |
| Side extension | Detached houses outside protected zones | Semi-detached properties (half-width rule) | Conservation areas (186), Article 4 zones (389), 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 Buckinghamshire | Front-facing rooflights in conservation areas | Listed buildings |
| Outbuilding / garden office | Only outside conservation areas and Article 4 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 Buckinghamshire (internal works) | If changing external appearance significantly | Listed buildings |
This is general guidance based on Buckinghamshire's planning constraints. Your specific property may differ — use our free PD checker to get a result tailored to your address.
Permitted development in Buckinghamshire
Buckinghamshire has one of the most restricted PD landscapes in England, with 186 conservation areas, 389 Article 4 directions (the highest of any authority), and extensive Green Belt covering much of the southern part. The Article 4 directions remove PD rights across wide areas, including many suburban streets where window replacements, re-roofing, and boundary changes need permission. In the Green Belt, extensions must not be disproportionate. The Chilterns AONB covers much of the southern half of the county.
What Buckinghamshire expects from your project
Local design guidance
- Residential Design Guidance SPD (Chiltern & South Bucks)
- Residential Extensions and Householder Development SPD (Wycombe)
- Aylesbury Vale Area Design SPD
Local Plan: Buckinghamshire Local Plan
Buckinghamshire Council was created in April 2020 merging Aylesbury Vale, Chiltern, South Bucks and Wycombe districts. Legacy plans from the former districts continue as saved policies. The council is preparing a single new Buckinghamshire Local Plan for the whole area.
Emerging / replacement plan
A Regulation 18 Issues and Options consultation ran in autumn 2022. The Regulation 19 Pre-Submission Plan was published for consultation in 2024, with submission to the Planning Inspectorate expected by 2025-2026.
186 conservation areas
Buckinghamshire 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.
389 Article 4 directions
Buckinghamshire has applied Article 4 directions to 389 areas, which remove certain permitted development rights in those zones. Use our free checker to see if your property is affected.
Conservation areas in Buckinghamshire
186 designated conservation areas
The 186 conservation areas protect the character of Buckinghamshire's towns and villages — from the historic centres of High Wycombe, Amersham, and Marlow to the medieval villages of the Chilterns and the market towns of the Vale. The Article 4 directions in many conservation areas and surrounding streets remove additional PD rights. The county's varied building traditions include flint and brick in the Chilterns, stone in the north, and timber-framing in the vale villages.
Article 4 directions in Buckinghamshire
389 Article 4 direction areas
Listed buildings in Buckinghamshire
There are 5,880 listed buildings in Buckinghamshire. 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 Buckinghamshire's conservation team before starting any work on a listed property.
Planning application statistics
Year ending September 2025 | Source: MHCLG planning application statistics
Buckinghamshire received 4,977 planning applications and decided 4,730 in the year ending September 2025. The approval rate of 83.3% 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.
Buckinghamshire Council received 4,977 planning applications in the year ending September 2025, with an 83.3% approval rate across 4,730 decisions. The council processed 3,050 householder applications — one of the highest volumes in England. The lower approval rate reflects the extensive constraints of Green Belt, AONB, 389 Article 4 directions, and 186 conservation areas.
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 Buckinghamshire
Browse what's been approved near you
Seeing what similar projects have been approved near your property can help you understand what Buckinghamshire expects in terms of scale, materials, and design. It's also useful for gauging how quickly the council processes applications.
Search planning applications on Buckinghamshire'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 Buckinghamshire
Housing Delivery Test 2023 measurement | Source: MHCLG
Buckinghamshire delivered 8,366 homes against a requirement of 6,599 over the three-year measurement period, giving a Housing Delivery Test score of 127%. This is above the 95% threshold, which means there are no government-imposed consequences for housing under-delivery. Planning applications in Buckinghamshire are assessed on their own merits under standard planning policies.
Lawful Development Certificates in Buckinghamshire
A Lawful Development Certificate (LDC) is formal confirmation from Buckinghamshire 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.
Buckinghamshire decided 3,050 householder applications in the year ending september 2025. Their 8-week performance of 89.8% is below the national average of 93%, so LDC applications may take longer than the 8-week target. LDC applications follow the same 8-week statutory determination period as householder planning applications.
How to apply for an LDC in Buckinghamshire
You can apply for a Lawful Development Certificate through the Planning Portal or directly through Buckinghamshire'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
Buckinghamshire 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 Buckinghamshire needs planning permission.
FROM £39Permitted Development Certificate Report
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£49Buckinghamshire Local Authority Report
Approval rates, decision patterns, Article 4 directions, fees & timelines, and council-specific tips for Buckinghamshire.
Pre-application advice in Buckinghamshire
Buckinghamshire offers a pre-application advice service.
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 →Buckinghamshire Council offers a paid pre-application advice service. Householder enquiries from around £150. Apply online through the council's planning portal.
Planning fees and timelines in Buckinghamshire
| 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 Buckinghamshire and may change. Building regulations fees are separate — see the building control section below.
Building regulations in Buckinghamshire
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 Buckinghamshire is provided by Buckinghamshire Building Control. You can also use a private approved inspector instead of the council's service.
Building control contact
Buckinghamshire Council Building Control or approved private inspectors.
Buckinghamshire planning department
Your building project checklist for Buckinghamshire
- Check if your property is in a conservation area — Buckinghamshire has 186 conservation areas. Use our free checker or see the list above.
- Check for Article 4 directions at your address — Buckinghamshire has 389 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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