Planning Permission in Dorset
Unitary Authority in South West · Last updated April 2026
Dorset Council is one of England's most heritage-rich planning authorities, with 311 conservation areas, 78 Article 4 directions, 9,215 listed buildings, and Green Belt land. The council area covers the rural heart of Dorset, including much of the Dorset AONB, the Jurassic Coast World Heritage Site, and the Cranborne Chase AONB.
Processing nearly 3,000 applications each year with a 90.3% approval rate, Dorset Council balances the need for new homes and extensions with the protection of some of England's most valued landscapes and historic settlements. From thatched cottages in Purbeck to Georgian townhouses in Dorchester, the built environment requires sensitive development.
Homeowners should check whether their property falls within any of the council's local plan designations, as the combination of conservation areas, Article 4 directions, and Green Belt significantly influences what can be built under permitted development.
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What can I build in Dorset?
| 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 (311), Article 4 zones (78), 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 (311), Article 4 zones (78), listed buildings |
| Side extension | Detached houses outside protected zones | Semi-detached properties (half-width rule) | Conservation areas (311), Article 4 zones (78), 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 Dorset | 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 Dorset (internal works) | If changing external appearance significantly | Listed buildings |
This is general guidance based on Dorset's planning constraints. Your specific property may differ — use our free PD checker to get a result tailored to your address.
Permitted development in Dorset
With 311 conservation areas and 78 Article 4 directions, Dorset has one of the most restricted permitted development landscapes in England. Many villages and towns have Article 4 directions removing specific PD rights, particularly for changes to windows, doors, and roofing materials. The Green Belt around Poole and Bournemouth's fringes adds further constraints. Homeowners outside these designations generally enjoy full PD rights, but the density of protected areas means checking is essential before starting any work.
What Dorset expects from your project
Local Plan: Dorset Local Plan
Dorset Council was created in April 2019 merging East Dorset, North Dorset, Purbeck, West Dorset and Weymouth & Portland districts. The former districts' saved policies continue to apply. The new Dorset Local Plan covers the area outside Bournemouth, Christchurch and Poole (a separate UA).
Emerging / replacement plan
The Dorset Local Plan was submitted to the Planning Inspectorate in 2022 and examined in 2022-2023. The Inspector found the plan unsound and Dorset Council withdrew it in 2023. A revised plan is now being prepared with new consultations launched in 2024.
311 conservation areas
Dorset 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.
78 Article 4 directions
Dorset has applied Article 4 directions to 78 areas, which remove certain permitted development rights in those zones. Use our free checker to see if your property is affected.
90.3% approval rate
Dorset approves 90.3% of planning applications, above the national average of 86.9%. Well-designed residential applications in this area tend to have a good chance of success.
Conservation areas in Dorset
311 designated conservation areas
Dorset's 311 conservation areas reflect the county's extraordinary architectural and historic diversity — from the stone-built villages of the Purbeck, to the cob and thatch settlements of the Blackmore Vale, to the Georgian and Regency terraces of Dorchester and Sherborne. The Article 4 directions in many conservation areas remove additional PD rights, meaning even minor external changes such as replacing windows or painting render may require planning permission.
Article 4 directions in Dorset
78 Article 4 direction areas
Listed buildings in Dorset
There are 9,215 listed buildings in Dorset. 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 Dorset's conservation team before starting any work on a listed property.
Planning application statistics
Year ending September 2025 | Source: MHCLG planning application statistics
Dorset received 2,959 planning applications and decided 2,915 in the year ending September 2025. The approval rate of 90.3% is above 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.
Dorset Council processed 2,959 planning applications in the year ending September 2025, with a 90.3% approval rate across 2,915 decisions. The council handled 1,303 householder applications with a 96.5% on-time rate. Major applications achieved a 91.2% on-time rate. The delegation rate stands at 95.9%, with most decisions made by planning officers under delegated authority.
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 Dorset
Browse what's been approved near you
Seeing what similar projects have been approved near your property can help you understand what Dorset expects in terms of scale, materials, and design. It's also useful for gauging how quickly the council processes applications.
Search planning applications on Dorset'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 Dorset
Housing Delivery Test 2023 measurement | Source: MHCLG
Dorset delivered 5,065 homes against a requirement of 4,774 over the three-year measurement period, giving a Housing Delivery Test score of 106%. This is above the 95% threshold, which means there are no government-imposed consequences for housing under-delivery. Planning applications in Dorset are assessed on their own merits under standard planning policies.
Lawful Development Certificates in Dorset
A Lawful Development Certificate (LDC) is formal confirmation from Dorset 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.
Dorset decided 1,303 householder applications in the year ending september 2025. Their 8-week performance of 96.5% 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 Dorset
You can apply for a Lawful Development Certificate through the Planning Portal or directly through Dorset'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
Dorset 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 Dorset needs planning permission.
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Approval rates, decision patterns, Article 4 directions, fees & timelines, and council-specific tips for Dorset.
Pre-application advice in Dorset
Dorset 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 →Dorset Council provides a paid pre-application advice service. Householder enquiries typically £150-£250. Apply through the Dorset Council planning pages.
Planning fees and timelines in Dorset
| 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 Dorset and may change. Building regulations fees are separate — see the building control section below.
Building regulations in Dorset
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 Dorset is provided by Dorset Building Control. You can also use a private approved inspector instead of the council's service.
Building control contact
Dorset Council Building Control or approved private inspectors.
Dorset planning department
Your building project checklist for Dorset
- Check if your property is in a conservation area — Dorset has 311 conservation areas. Use our free checker or see the list above.
- Check for Article 4 directions at your address — Dorset has 78 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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