Planning Permission in Portsmouth
Unitary Authority in South East · Last updated April 2026
Portsmouth is a compact island city on the south coast of Hampshire with an extraordinary naval heritage. The city contains 25 conservation areas and 456 listed buildings, concentrated around the Historic Dockyard (home to HMS Victory and the Mary Rose), Old Portsmouth, and the Victorian residential areas of Southsea.
As one of England's most densely populated cities, Portsmouth's planning context is dominated by tight urban fabric, limited land availability, and high housing demand. The Solent Recreation Mitigation Partnership (Bird Aware) requires contributions for new residential development to protect the Solent's internationally important bird habitats.
Portsmouth approved 86% of planning applications in the year ending September 2025, with 623 decisions from 630 applications. Housing delivery at just 26% triggers the presumption in favour of sustainable development — the most acute housing delivery shortfall in the region.
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What can I build in Portsmouth?
| 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 (25), 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 (25), listed buildings |
| Side extension | Detached houses outside protected zones | Semi-detached properties (half-width rule) | Conservation areas (25), listed buildings |
| Loft conversion (dormer) | Houses outside conservation areas | Properties on prominent corners | Conservation areas, listed buildings, flats |
| Loft conversion (Velux/rooflight) | Most of Portsmouth | 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 Portsmouth (internal works) | If changing external appearance significantly | Listed buildings |
This is general guidance based on Portsmouth's planning constraints. Your specific property may differ — use our free PD checker to get a result tailored to your address.
Permitted development in Portsmouth
Portsmouth's permitted development framework is shaped by 25 conservation areas covering much of the historic city and Victorian suburbs. While no Article 4 directions are in force, the density of the urban fabric means extensions often affect neighbouring properties. Terraced houses, which dominate the housing stock in Southsea and across Portsea Island, have more limited PD rights than detached houses. The Solent Recreation Mitigation requirement applies to all new residential units, adding a financial consideration even for conversions.
What Portsmouth expects from your project
Local design guidance
Sustainable Design and Construction SPD
Local Plan: Portsmouth Plan (Core Strategy) 2006–2027
Portsmouth City Council adopted its Core Strategy in March 2012. As an island city with fixed boundaries, Portsmouth has very limited land for development and the plan focuses intensification on the city centre, waterfront regeneration sites and the Northern Quarter. Portsmouth works closely with the Partnership for Urban South Hampshire (PUSH) on sub-regional planning.
Emerging / replacement plan
Portsmouth is preparing a new Local Plan 2042. A Regulation 19 Pre-Submission plan was consulted on in 2023, with submission to the Planning Inspectorate anticipated in 2024–2025 and adoption targeted for 2026.
25 conservation areas
Portsmouth 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.
Conservation areas in Portsmouth
25 designated conservation areas
Portsmouth's 25 conservation areas protect a diverse maritime and urban heritage. Old Portsmouth around the Cathedral and harbour entrance retains its historic character. The Historic Dockyard area is of international significance. Southsea's conservation areas protect Victorian and Edwardian residential streets with their distinctive bay-windowed terraces. The seafront conservation areas preserve the character of the Clarence Parade and King's Road promenades. The council expects proposals to respect the specific qualities of each area.
Article 4 directions in Portsmouth
4 Article 4 direction areas
Listed buildings in Portsmouth
There are 456 listed buildings in Portsmouth. 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 Portsmouth's conservation team before starting any work on a listed property.
Planning application statistics
Year ending September 2025 | Source: MHCLG planning application statistics
Portsmouth received 630 planning applications and decided 623 in the year ending September 2025. The approval rate of 86% 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.
Portsmouth approved 86% of applications in the year ending September 2025 with an 85.1% delegation rate. Major applications were decided on time in 85.7% of cases, with householder applications at 96.9%. The council processed 623 decisions from 630 applications, including 224 householder decisions. Housing delivery at 26% — one of the lowest in England — triggers the NPPF presumption in favour of sustainable development.
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 Portsmouth
Browse what's been approved near you
Seeing what similar projects have been approved near your property can help you understand what Portsmouth expects in terms of scale, materials, and design. It's also useful for gauging how quickly the council processes applications.
Search planning applications on Portsmouth'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 Portsmouth
Housing Delivery Test 2023 measurement | Source: MHCLG
Portsmouth delivered 584 homes against a requirement of 2,248 over the three-year measurement period, giving a Housing Delivery Test score of 26%. This is well below the 75% threshold, which triggers the most significant consequence: the “presumption in favour of sustainable development” (also called the “tilted balance”). This means planning applications for housing should be approved unless the harm would significantly and demonstrably outweigh the benefits. For homeowners, this is a strong signal — Portsmouth is under considerable pressure to approve housing, making it one of the more favourable environments for residential planning applications in England.
Lawful Development Certificates in Portsmouth
A Lawful Development Certificate (LDC) is formal confirmation from Portsmouth 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.
Portsmouth decided 224 householder applications in the year ending september 2025. Their 8-week performance of 96.9% 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 Portsmouth
You can apply for a Lawful Development Certificate through the Planning Portal or directly through Portsmouth'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
Portsmouth 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 Portsmouth.
Pre-application advice in Portsmouth
Portsmouth 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?
Check in 2 minutes with our free tool — no sign-up needed.
Check your PD rights now →Pre-application advice for householder and commercial developments within the Portsmouth city area.
Planning fees and timelines in Portsmouth
| 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 Portsmouth and may change. Building regulations fees are separate — see the building control section below.
Building regulations in Portsmouth
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 Portsmouth is provided by Portsmouth Building Control. You can also use a private approved inspector instead of the council's service.
Building control contact
Portsmouth planning department
Your building project checklist for Portsmouth
- Check if your property is in a conservation area — Portsmouth has 25 conservation areas. Use our free checker or see the list above.
- Check for Article 4 directions at your address — Portsmouth has 4 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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