Planning Permission in North Northamptonshire
Unitary Authority in East Midlands · Last updated April 2026
North Northamptonshire is a unitary authority formed in 2021, combining Corby, East Northamptonshire, Kettering, and Wellingborough. With 82 conservation areas, no Article 4 directions, and 2,707 listed buildings, the authority covers a mix of historic market towns, growth areas, and attractive rural villages along the Nene Valley.
The council handles around 1,430 applications annually with an 84.6% approval rate. The area is one of England's designated growth zones, balancing significant new housing development with the protection of its ironstone and limestone village heritage.
Homeowners should consult the local plan for guidance. The combination of conservation areas and listed buildings means checking designations is essential before starting work.
Planning a project in North Northamptonshire? Start here.
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What can I build in North Northamptonshire?
| 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 (82), 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 (82), listed buildings |
| Side extension | Detached houses outside protected zones | Semi-detached properties (half-width rule) | Conservation areas (82), listed buildings |
| Loft conversion (dormer) | Houses outside conservation areas | Properties on prominent corners | Conservation areas, listed buildings, flats |
| Loft conversion (Velux/rooflight) | Most of North Northamptonshire | 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 North Northamptonshire (internal works) | If changing external appearance significantly | Listed buildings |
This is general guidance based on North Northamptonshire's planning constraints. Your specific property may differ — use our free PD checker to get a result tailored to your address.
Permitted development in North Northamptonshire
North Northamptonshire has 82 conservation areas but no Article 4 directions and no Green Belt, meaning standard PD rights apply outside conservation areas. The 2,707 listed buildings are the main additional constraint. The authority covers both the growth towns (Corby, Kettering, Wellingborough) where PD rights are generally unrestricted, and the historic villages of the Nene Valley and rural areas where conservation area controls apply.
What North Northamptonshire expects from your project
Local Plan: North Northamptonshire Local Plan
North Northamptonshire unitary authority was created in April 2021 merging Corby, East Northamptonshire, Kettering and Wellingborough districts. Saved policies from the former authorities' plans continue to apply, including the North Northamptonshire Joint Core Strategy (2016) and the various Site Specific DPDs.
Emerging / replacement plan
North Northamptonshire is preparing a new unitary Local Plan. A Regulation 18 Issues and Options consultation ran in 2023, with Preferred Options expected in 2025-2026.
82 conservation areas
North Northamptonshire 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 North Northamptonshire
82 designated conservation areas
The 82 conservation areas protect the character of North Northamptonshire's most important historic environments — from the market towns of Oundle, Thrapston, and Rothwell to the ironstone villages of the Nene Valley. The area's distinctive building tradition of local ironstone and limestone creates a warm-toned built environment. Properties in conservation areas face restrictions on extensions, dormers, and external alterations.
Article 4 directions in North Northamptonshire
1 Article 4 direction area
Listed buildings in North Northamptonshire
There are 2,707 listed buildings in North Northamptonshire. 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 North Northamptonshire's conservation team before starting any work on a listed property.
Planning application statistics
Year ending September 2025 | Source: MHCLG planning application statistics
North Northamptonshire received 1,431 planning applications and decided 1,218 in the year ending September 2025. The approval rate of 84.6% 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.
North Northamptonshire Council received 1,431 planning applications in the year ending September 2025, with an 84.6% approval rate across 1,218 decisions. The council processed 586 householder applications. The approval rate is slightly below the national average, reflecting the council's assessment of development proposals against conservation and design policies.
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 North Northamptonshire
Browse what's been approved near you
Seeing what similar projects have been approved near your property can help you understand what North Northamptonshire expects in terms of scale, materials, and design. It's also useful for gauging how quickly the council processes applications.
Search planning applications on North Northamptonshire'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 North Northamptonshire
Housing Delivery Test 2023 measurement | Source: MHCLG
North Northamptonshire delivered 5,438 homes against a requirement of 4,806 over the three-year measurement period, giving a Housing Delivery Test score of 113%. This is above the 95% threshold, which means there are no government-imposed consequences for housing under-delivery. Planning applications in North Northamptonshire are assessed on their own merits under standard planning policies.
Lawful Development Certificates in North Northamptonshire
A Lawful Development Certificate (LDC) is formal confirmation from North Northamptonshire 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.
North Northamptonshire decided 586 householder applications in the year ending september 2025. Their 8-week performance of 92% 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 North Northamptonshire
You can apply for a Lawful Development Certificate through the Planning Portal or directly through North Northamptonshire'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
North Northamptonshire 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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£49North Northamptonshire Local Authority Report
Approval rates, decision patterns, Article 4 directions, fees & timelines, and council-specific tips for North Northamptonshire.
Pre-application advice in North Northamptonshire
North Northamptonshire 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 →North Northamptonshire Council offers a paid pre-application advice service. Householder enquiries from around £120. Apply online.
Planning fees and timelines in North Northamptonshire
| 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 North Northamptonshire and may change. Building regulations fees are separate — see the building control section below.
Building regulations in North Northamptonshire
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 North Northamptonshire is provided by North Northamptonshire Building Control. You can also use a private approved inspector instead of the council's service.
Building control contact
North Northamptonshire Council Building Control or approved private inspectors.
North Northamptonshire planning department
Your building project checklist for North Northamptonshire
- Check if your property is in a conservation area — North Northamptonshire has 82 conservation areas. Use our free checker or see the list above.
- Check for Article 4 directions at your address — North Northamptonshire has 1 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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