Planning Permission in North Hertfordshire
Non-Metropolitan District in East of England · Last updated April 2026
North Hertfordshire is a largely rural district covering the towns of Letchworth Garden City, Hitchin, Baldock, and Royston, set within the Chilterns chalk hills and the North Hertfordshire countryside. With 44 conservation areas and 1,735 listed buildings, the district has an exceptionally rich heritage landscape.
Letchworth Garden City — the world's first garden city, founded in 1903 — is a globally significant heritage asset with its own design principles. The extensive Green Belt and Chilterns AONB add landscape constraints. Despite having no Article 4 directions, the heritage density creates a complex planning environment.
North Hertfordshire's planning service manages applications across a diverse district combining garden city heritage, medieval market towns, and rural Hertfordshire villages.
Planning a project in North Hertfordshire? Start here.
Enter your address to check your permitted development rights, conservation area status, and Article 4 restrictions specific to North Hertfordshire.
Free check — no account required
What can I build in North Hertfordshire?
| 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 (44), 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 (44), listed buildings |
| Side extension | Detached houses outside protected zones | Semi-detached properties (half-width rule) | Conservation areas (44), 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 North Hertfordshire | 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 North Hertfordshire (internal works) | If changing external appearance significantly | Listed buildings |
This is general guidance based on North Hertfordshire'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 Hertfordshire
North Hertfordshire has no Article 4 directions, but with 44 conservation areas and extensive Green Belt, many properties face constraints. Letchworth Garden City has particular design controls through the Letchworth Heritage Foundation. In Hitchin, Baldock, and Royston, the conservation areas cover the historic town centres. Rural properties in the Green Belt face proportionality restrictions on extensions.
What North Hertfordshire expects from your project
Local design guidance
Local Plan: North Hertfordshire Local Plan 2011–2031
North Hertfordshire's Local Plan was adopted in November 2022, after a long examination that concluded in 2021. It provides for around 14,000 new homes and supporting infrastructure, including new settlements and urban extensions to Hitchin, Letchworth and Baldock.
Emerging / replacement plan
The Local Plan was recently adopted. North Hertfordshire will review the plan in line with national monitoring requirements, with a formal review anticipated after 2026.
44 conservation areas
North Hertfordshire 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.
32 Article 4 directions
North Hertfordshire has applied Article 4 directions to 32 areas, which remove certain permitted development rights in those zones. Use our free checker to see if your property is affected.
92% approval rate
North Hertfordshire approves 92% 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 North Hertfordshire
44 designated conservation areas
North Hertfordshire's 44 conservation areas protect an exceptional range of heritage. Letchworth Garden City's conservation areas recognise the world's first garden city — its tree-lined streets, cottage-style architecture, and planned layout are globally significant. Hitchin's medieval town centre, Baldock's Georgian High Street, and Royston's market town core are each distinctive. Village conservation areas across the Chilterns and chalk downlands protect traditional Hertfordshire character.
Article 4 directions in North Hertfordshire
32 Article 4 direction areas
Listed buildings in North Hertfordshire
There are 1,735 listed buildings in North Hertfordshire. 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 Hertfordshire's conservation team before starting any work on a listed property.
Planning application statistics
Year ending September 2025 | Source: MHCLG planning application statistics
North Hertfordshire received 1,112 planning applications and decided 1,057 in the year ending September 2025. The approval rate of 92% 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.
North Hertfordshire manages a substantial caseload with a 92% approval rate and 96.3% delegation rate. The 90.4% on-time rate for householder decisions and 1112 applications received demonstrate efficient processing.
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 Hertfordshire
Browse what's been approved near you
Seeing what similar projects have been approved near your property can help you understand what North Hertfordshire 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 Hertfordshire'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 Hertfordshire
Housing Delivery Test 2023 measurement | Source: MHCLG
North Hertfordshire delivered 1,400 homes against a requirement of 1,333 over the three-year measurement period, giving a Housing Delivery Test score of 105%. This is above the 95% threshold, which means there are no government-imposed consequences for housing under-delivery. Planning applications in North Hertfordshire are assessed on their own merits under standard planning policies.
Lawful Development Certificates in North Hertfordshire
A Lawful Development Certificate (LDC) is formal confirmation from North Hertfordshire 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 Hertfordshire decided 626 householder applications in the year ending september 2025. Their 8-week performance of 90.4% 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 Hertfordshire
You can apply for a Lawful Development Certificate through the Planning Portal or directly through North Hertfordshire'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 Hertfordshire 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 North Hertfordshire needs planning permission.
FROM £39Permitted Development Certificate Report
Get a comprehensive report for your Lawful Development Certificate application.
£49North Hertfordshire Local Authority Report
Approval rates, decision patterns, Article 4 directions, fees & timelines, and council-specific tips for North Hertfordshire.
Pre-application advice in North Hertfordshire
North Hertfordshire offers a pre-application advice service. The fee for householder pre-app advice is Varies by proposal type.
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 Hertfordshire offers pre-application advice for householder and larger developments.
Planning fees and timelines in North Hertfordshire
| 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 Hertfordshire and may change. Building regulations fees are separate — see the building control section below.
Building regulations in North Hertfordshire
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 Hertfordshire is provided by North Hertfordshire Building Control. You can also use a private approved inspector instead of the council's service.
Building control contact
North Hertfordshire planning department
Your building project checklist for North Hertfordshire
- Check if your property is in a conservation area — North Hertfordshire has 44 conservation areas. Use our free checker or see the list above.
- Check for Article 4 directions at your address — North Hertfordshire has 32 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
Stay informed about planning in North Hertfordshire
Approval rate updates, Article 4 changes, and local planning tips — straight to your inbox.
No spam. Unsubscribe anytime.