Planning Permission in Maidstone
Non-Metropolitan District in South East · Last updated April 2026
Maidstone is the county town of Kent, sitting on the River Medway with a historic town centre and rapidly growing suburbs. The borough extends into the Kent Downs AONB to the north and the Weald countryside to the south, with significant Green Belt protecting the landscape between the town and the M20 corridor. Villages like Headcorn, Lenham, and Staplehurst combine rural charm with rail connections to London.
With 53 conservation areas, 85 Article 4 directions, Green Belt, and 2,019 listed buildings, Maidstone has a complex planning environment. The council approved 80.8% of applications in the year ending September 2025, processing 1,189 decisions — one of the larger caseloads in Kent.
This guide covers permitted development rights, planning fees, and the application process for homeowners across the Maidstone borough — from urban extensions to rural barn conversions and Green Belt properties.
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What can I build in Maidstone?
| 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 (53), Article 4 zones (85), 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 (53), Article 4 zones (85), listed buildings |
| Side extension | Detached houses outside protected zones | Semi-detached properties (half-width rule) | Conservation areas (53), Article 4 zones (85), 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 Maidstone | 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 Maidstone (internal works) | If changing external appearance significantly | Listed buildings |
This is general guidance based on Maidstone's planning constraints. Your specific property may differ — use our free PD checker to get a result tailored to your address.
Permitted development in Maidstone
Maidstone's planning context combines urban growth pressure with extensive countryside protection. The Green Belt, Kent Downs AONB, and 53 conservation areas all restrict permitted development rights. The 85 Article 4 directions — one of the higher counts in Kent — remove specific PD rights in historic areas, particularly for front-facing alterations. Properties in the Green Belt must ensure extensions are not disproportionate to the original dwelling. In Maidstone town, standard PD rights generally apply outside the conservation areas, though new-build estates may have conditions restricting PD.
What Maidstone expects from your project
Local design guidance
Kent Design Guide (adopted as SPD)
Local Plan: Maidstone Borough Local Plan
The Maidstone Borough Local Plan was adopted in October 2017, supplemented by the Maidstone Borough Local Plan Review (adopted March 2021) which added additional housing allocations. Maidstone is the county town of Kent with significant pressure for housing growth.
Emerging / replacement plan
Maidstone is preparing a new Local Plan. A Regulation 18 Issues and Options consultation ran in 2022-2023, and a Regulation 19 Pre-Submission consultation ran in 2024.
53 conservation areas
Maidstone 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.
85 Article 4 directions
Maidstone has applied Article 4 directions to 85 areas, which remove certain permitted development rights in those zones. Use our free checker to see if your property is affected.
Conservation areas in Maidstone
53 designated conservation areas
Maidstone's 53 conservation areas span the historic town centre, riverside areas, and numerous villages across the borough. The town centre conservation area encompasses the Archbishop's Palace, All Saints Church, and the medieval street pattern. Rural conservation areas include the timber-framed villages of Headcorn, Boughton Monchelsea, and Loose. With 2,019 listed buildings and 85 Article 4 directions, the council applies rigorous heritage assessment. Many Article 4 directions cover window and door replacements, boundary treatments, and roofing materials.
Article 4 directions in Maidstone
85 Article 4 direction areas
Listed buildings in Maidstone
There are 2,019 listed buildings in Maidstone. 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 Maidstone's conservation team before starting any work on a listed property.
Planning application statistics
Year ending September 2025 | Source: MHCLG planning application statistics
Maidstone received 1,203 planning applications and decided 1,117 in the year ending September 2025. The approval rate of 80.8% 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.
Maidstone processed a substantial caseload of 1,189 planning decisions in the year ending September 2025. The 80.8% approval rate is below the national average, reflecting the borough's complex mix of Green Belt, AONB, conservation areas, and Article 4 directions. Major applications achieved 100% on-time performance, minors 90.5%, and householder applications 92.3%. The 96.2% delegation rate shows efficient processing despite the high volume.
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 Maidstone
Browse what's been approved near you
Seeing what similar projects have been approved near your property can help you understand what Maidstone expects in terms of scale, materials, and design. It's also useful for gauging how quickly the council processes applications.
Search planning applications on Maidstone'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 Maidstone
Housing Delivery Test 2023 measurement | Source: MHCLG
Maidstone delivered 4,137 homes against a requirement of 2,773 over the three-year measurement period, giving a Housing Delivery Test score of 149%. This is above the 95% threshold, which means there are no government-imposed consequences for housing under-delivery. Planning applications in Maidstone are assessed on their own merits under standard planning policies.
Lawful Development Certificates in Maidstone
A Lawful Development Certificate (LDC) is formal confirmation from Maidstone 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.
Maidstone decided 564 householder applications in the year ending september 2025. Their 8-week performance of 98.4% 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 Maidstone
You can apply for a Lawful Development Certificate through the Planning Portal or directly through Maidstone'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
Maidstone 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
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Approval rates, decision patterns, Article 4 directions, fees & timelines, and council-specific tips for Maidstone.
Pre-application advice in Maidstone
Maidstone offers a pre-application advice service. The fee for householder pre-app advice is From £150 for householder proposals. You can typically expect a response within 28 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?
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Check your PD rights now →Maidstone offers pre-application advice for householder and larger schemes. With 85 Article 4 directions and extensive Green Belt, pre-app advice is strongly recommended.
Planning fees and timelines in Maidstone
| 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 Maidstone and may change. Building regulations fees are separate — see the building control section below.
Building regulations in Maidstone
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 Maidstone is provided by Maidstone Borough Council Building Control. You can also use a private approved inspector instead of the council's service.
Building control contact
Maidstone planning department
Your building project checklist for Maidstone
- Check if your property is in a conservation area — Maidstone has 53 conservation areas. Use our free checker or see the list above.
- Check for Article 4 directions at your address — Maidstone has 85 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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