Planning Permission in Lewes
Non-Metropolitan District in South East · Last updated April 2026
Lewes district stretches from the South Downs to the Sussex coast, encompassing the historic county town of Lewes, the coastal towns of Seaford, Peacehaven, and Newhaven, and picturesque downland villages. The district contains 28 conservation areas and 355 listed buildings, with the town of Lewes itself being one of Sussex's most architecturally rich settlements.
A significant portion of the district falls within the South Downs National Park, where planning authority transfers to the National Park Authority. The council shares services with Eastbourne Borough Council. Lewes town's annual Bonfire Night celebrations and its medieval street pattern make it one of England's most characterful county towns.
Lewes district approved 91.4% of planning applications in the year ending September 2025, with 420 decisions from 410 applications. Housing delivery at 89% triggers an action plan requirement.
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What can I build in Lewes?
| 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 | Conservation areas (28), listed buildings |
| Rear extension (two storey) | Only outside conservation areas and Article 4 zones, if within 3m limit | Check distance to boundary ≥7m | Conservation areas (28), listed buildings |
| Side extension | Detached houses outside protected zones | Semi-detached properties (half-width rule) | Conservation areas (28), listed buildings |
| Loft conversion (dormer) | Houses outside conservation areas | Properties on prominent corners | Conservation areas, listed buildings, flats |
| Loft conversion (Velux/rooflight) | Most of Lewes | 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 |
| 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 Lewes (internal works) | If changing external appearance significantly | Listed buildings |
This is general guidance based on Lewes's planning constraints. Your specific property may differ — use our free PD checker to get a result tailored to your address.
Permitted development in Lewes
Lewes district's permitted development framework is shaped by 28 conservation areas and the South Downs National Park covering much of the northern district. Within the National Park, PD rights for extensions are reduced and the National Park Authority is the planning authority. Outside the park, standard PD rights apply except in conservation areas. The coastal towns have their own planning context, with clifftop erosion affecting some areas.
What Lewes expects from your project
Local Plan: Lewes District Local Plan (Parts 1 and 2)
Lewes District adopted Local Plan Part 1 in March 2016 and Part 2 in July 2020. A significant portion of the district falls within the South Downs National Park (a separate planning authority), with the district council covering the coastal areas including Newhaven, Seaford and Peacehaven. Growth is constrained by the national park and coastal flood risk.
Emerging / replacement plan
Lewes is jointly preparing a new Local Plan with Eastbourne Borough Council. An Issues and Options consultation ran in 2022–2023, with a Regulation 19 plan anticipated in 2025.
28 conservation areas
Lewes 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.
91.4% approval rate
Lewes approves 91.4% 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 Lewes
28 designated conservation areas
Lewes district's 28 conservation areas range from the medieval core of Lewes town — with its Norman castle, timber-framed buildings, and Georgian high street — to coastal settlements and downland villages. Lewes town centre is particularly significant, with twittens (narrow passageways), flint buildings, and mathematical tile facades. The council expects proposals to respect the specific character of each area, with particular attention to local materials and traditional building forms.
Article 4 directions in Lewes
5 Article 4 direction areas
Listed buildings in Lewes
There are 355 listed buildings in Lewes. 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 Lewes's conservation team before starting any work on a listed property.
Planning application statistics
Year ending September 2025 | Source: MHCLG planning application statistics
Lewes received 410 planning applications and decided 420 in the year ending September 2025. The approval rate of 91.4% 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.
Lewes district approved 91.4% of applications in the year ending September 2025 with a 94.3% delegation rate. Major applications were decided on time in 70% of cases, with householder at 78.6%. The council processed 420 decisions from 410 applications, including 238 householder decisions. Housing delivery at 89% triggers an action plan requirement.
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 Lewes
Browse what's been approved near you
Seeing what similar projects have been approved near your property can help you understand what Lewes expects in terms of scale, materials, and design. It's also useful for gauging how quickly the council processes applications.
Search planning applications on Lewes'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 Lewes
Housing Delivery Test 2023 measurement | Source: MHCLG
Lewes delivered 1,194 homes against a requirement of 1,339 over the three-year measurement period, giving a Housing Delivery Test score of 89%. This is below the 95% threshold, which means Lewes must publish an action plan setting out how it intends to increase housing delivery. For homeowners, this is a positive signal — the council is under pressure to approve more housing, which can make planning officers more receptive to well-designed residential applications and extensions that add living space.
Lawful Development Certificates in Lewes
A Lawful Development Certificate (LDC) is formal confirmation from Lewes 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.
Lewes decided 238 householder applications in the year ending september 2025. Their 8-week performance of 78.6% 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 Lewes
You can apply for a Lawful Development Certificate through the Planning Portal or directly through Lewes'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
Lewes 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.
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Approval rates, decision patterns, Article 4 directions, fees & timelines, and council-specific tips for Lewes.
Pre-application advice in Lewes
Lewes offers a pre-application advice service. The fee for householder pre-app advice is From £60 for householder proposals.
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 →Pre-application advice for householder and commercial developments within the Lewes district.
Planning fees and timelines in Lewes
| 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 Lewes and may change. Building regulations fees are separate — see the building control section below.
Building regulations in Lewes
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 Lewes is provided by Lewes and Eastbourne Building Control. You can also use a private approved inspector instead of the council's service.
Building control contact
Lewes planning department
Your building project checklist for Lewes
- Check if your property is in a conservation area — Lewes has 28 conservation areas. Use our free checker or see the list above.
- Check for Article 4 directions at your address — Lewes has 5 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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