Planning Permission in Barnet
London Borough in London · Last updated April 2026
Barnet is a London Borough in North London, stretching from the bustling suburban centres of Hendon and Finchley to the leafy residential neighbourhoods around Hampstead Garden Suburb and Golders Green. The borough has one of London's most varied housing stocks, mixing Victorian and Edwardian terraces, interwar semi-detached homes, and modern developments.
Planning decisions in Barnet are shaped by 648 listed buildings, 16 conservation areas, and an unusually high 48 Article 4 direction zones. These designations protect everything from Hampstead Garden Suburb's Arts and Crafts character to Monken Hadley's village setting. If your property falls within any of these protected areas, additional planning rules will apply to your building work.
For homeowners planning extensions, alterations, or other building work, understanding permitted development rights and how Barnet's many designations affect them is essential. This guide will help you navigate the planning process and work out what permissions you need for your project.
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What can I build in Barnet?
| Project type | Likely permitted development | May need planning permission | Likely needs planning permission |
|---|---|---|---|
| Rear extension (single storey) | Properties outside conservation areas and Article 4 zones | Properties in Green Belt fringe areas | Conservation areas (16), Article 4 zones (48), listed buildings |
| Rear extension (two storey) | Properties outside protected zones, if within 3m limit | Properties near boundaries in suburban areas | Conservation areas, Article 4 zones, listed buildings |
| Side extension | Detached houses outside protected zones | Semi-detached properties (half-width rule) | Conservation areas, Article 4 zones (especially Hampstead Garden Suburb), listed buildings |
| Loft conversion (dormer) | Houses outside conservation areas and Article 4 zones | Properties on prominent corners or near Green Belt | Conservation areas, Hampstead Garden Suburb, Finchley Church End Article 4 areas, listed buildings, flats |
| Loft conversion (Velux/rooflight) | Most of borough outside protected zones | Front-facing rooflights in conservation areas | Listed buildings, Hampstead Garden Suburb Article 4 |
| Outbuilding / garden office | Most properties 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 in conservation areas with Article 4 restrictions | Listed buildings, Hampstead Garden Suburb |
| 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 Article 4 restrictions |
| Garage conversion | Most of borough (internal works) | If changing external appearance significantly | Listed buildings |
This is general guidance based on Barnet's planning constraints. Your specific property may differ — use our free PD checker to get a result tailored to your address.
Permitted development in Barnet
Permitted development rights in Barnet are subject to significant restrictions. Across the borough, there are 48 Article 4 direction areas where permitted development rights have been removed. These cover conservation areas like Hampstead Garden Suburb and Finchley Church End, agricultural land, and HMO conversions. If your property is within one of these areas, work that might normally be permitted development elsewhere will require planning permission. Even minor works like roof alterations, extensions, or changes to garden structures may need permission in these zones.
What Barnet expects from your project
Barnet's housing character is predominantly interwar suburban — the 1920s and 1930s semi-detached and detached homes that line the streets of Edgware, Mill Hill, Finchley, and Hendon. These typically feature red brick or pebbledash render, bay windows, hipped roofs with clay tiles, and generous front and rear gardens. Victorian and Edwardian terraces are common in East Finchley and Cricklewood, while Hampstead Garden Suburb features distinctive Arts and Crafts architecture, and Totteridge has a rural village character with larger plots.
When planning an extension or alteration, Barnet's planners expect your design to be subordinate to the original house — meaning it should not dominate or overpower the existing building. Two-storey side extensions should step down the roofline and set back the front building line to avoid a 'terracing' effect on semi-detached properties. Dormers should be subordinate features, not covering more than half the roof width. Materials should match or complement the existing building.
Barnet's Residential Design Guidance SPD (October 2016) is the key document for homeowners to read before designing an extension. It covers extensions, conversions, density, and streetscape character. The Local Plan 2021–2036 includes design policies CDH01, CDH04, and CDH08. As a London borough, London Plan policies D3 and D4 also apply. Even if your project is permitted development, matching your extension to the local character will protect your property value and avoid neighbour disputes.
Local design guidance
Residential Design Guidance SPD
Adopted 2016Local Plan: Barnet Local Plan 2012-2030
The Barnet Local Plan comprises the Core Strategy (adopted September 2012) and Development Management Policies (adopted September 2012). The plan period extends to 2030. The London Plan (2021) also applies as part of the statutory development plan.
Emerging / replacement plan
Barnet is preparing a new Local Plan. A Regulation 18 Issues and Options consultation took place in 2021, and a Regulation 19 Pre-Submission Plan consultation ran in 2023. Submission to the Planning Inspectorate was made in 2024.
48 Article 4 directions
Barnet has applied Article 4 directions to 48 areas, which remove certain permitted development rights in those zones. Use our free checker to see if your property is affected.
76.9% approval rate
Barnet's planning approval rate is below the national average of 86.9%. If your project needs planning permission, consider pre-application advice before submitting — it significantly reduces refusal risk.
Conservation areas in Barnet
16 designated conservation areas
Barnet contains 16 conservation areas, each with distinctive character. Notable areas include Hampstead Garden Suburb (renowned Arts and Crafts architecture), Railway Terraces, Golders Green, Hendon The Burroughs, College Farm, Finchley Garden Village, Totteridge, and Monken Hadley. In conservation areas, additional restrictions apply — you cannot normally carry out external alterations, fell trees, or change roof lines without consent. Even replacing windows, painting brickwork, or adding satellite dishes may require planning permission. Use our free checker to see if your property is in a conservation area.
Article 4 directions in Barnet
48 Article 4 direction areas
Article 4 directions are used extensively across Barnet's 48 designated areas to restrict permitted development rights. The most significant affect Hampstead Garden Suburb, Finchley Church End (seven separate areas), Monken Hadley (fifteen areas), and Totteridge. There are also directions covering agricultural land and HMO conversions. In these areas, you will need planning permission for work that would normally be permitted development, such as extensions, loft conversions, or external alterations. Use our free PD checker to see if your address is affected.
Listed buildings in Barnet
There are 648 listed buildings in Barnet. 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 Barnet's conservation team before starting any work on a listed property.
Planning application statistics
Year ending September 2025 | Source: MHCLG planning application statistics
Barnet received 2,837 planning applications and decided 2,694 in the year ending September 2025. The approval rate of 76.9% 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.
Of the 2,694 planning decisions made by Barnet, 1,502 were householder applications — the most common type, covering extensions, loft conversions, and alterations. The borough's approval rate of 76.9% is below the national average of 86.9%, reflecting Barnet's relatively strict approach to design quality, particularly in its 16 conservation areas and 48 Article 4 zones. Householder applications were decided within the 8-week target 96.8% of the time, which is above the national average. Applications in conservation areas or for listed buildings may face additional scrutiny and take longer.
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 Barnet
Browse what's been approved near you
Seeing what similar projects have been approved near your property can help you understand what Barnet expects in terms of scale, materials, and design. It's also useful for gauging how quickly the council processes applications.
Search planning applications on Barnet'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 Barnet
Housing Delivery Test 2023 measurement | Source: MHCLG
Barnet delivered 6,542 homes against a requirement of 6,302 over the three-year measurement period, giving a Housing Delivery Test score of 104%. This is above the 95% threshold, which means there are no government-imposed consequences for housing under-delivery. Planning applications in Barnet are assessed on their own merits under standard planning policies.
Lawful Development Certificates in Barnet
A Lawful Development Certificate (LDC) is formal confirmation from Barnet 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.
Barnet decided 1,502 householder applications in the year ending september 2025. Their 8-week performance of 96.8% 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 Barnet
You can apply for a Lawful Development Certificate through the Planning Portal or directly through Barnet'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
Barnet 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 Barnet.
Pre-application advice in Barnet
Barnet offers a pre-application advice service. The fee for householder pre-app advice is £255 (incl. VAT) for standard householder advice, £412 for heritage/Green Belt properties. You can typically expect a response within 4 weeks from registration.
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.
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Check your PD rights now →Informal initial discussions for very minor householder works (small extensions and alterations) are provided free of charge. The formal written pre-app fee applies to more substantial householder proposals. If you submit multiple proposals, the first is charged at the full rate and additional options at 50%.
Planning fees and timelines in Barnet
| Application type | Fee | Typical timeline |
|---|---|---|
| Householder planning application | £528 | 8 weeks |
| Lawful Development Certificate (proposed) | £264 | 8 weeks |
| Lawful Development Certificate (existing) | £298 | 8 weeks |
| Discharge of conditions | £145 | 8 weeks |
| Pre-application advice (householder) | £255 incl. VAT | 4 weeks |
| Certificate of lawfulness (proposed use) | £264 | 8 weeks |
| Listed building consent | Free | 8 weeks |
| Tree works in conservation area | Free | 6 weeks |
Fees are set nationally and correct as of April 2026. Pre-application fees are set by Barnet and may change. Building regulations fees are separate — see the building control section below.
Building regulations in Barnet
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 Barnet is provided by Barnet Building Control. They offer both the Building Notice route (for smaller domestic works — full charge payable on submission) and the Full Plans route (deposit charge on submission, inspection charge after first visit). A free first-hour consultation with a Building Control Surveyor is available. You can also use a private approved inspector instead of the council's service.
Barnet publishes a building control charges schedule on their website. Regularisation applications are charged at 150% of the Building Notice fee. Email building.control@barnet.gov.uk for a personalised quote.
Barnet planning department
Your building project checklist for Barnet
- Check if your property is in a conservation area — Barnet has 16 conservation areas. Use our free checker or see the list above.
- Check for Article 4 directions at your address — Barnet has 48 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.
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