Planning Permission in Harlow
Non-Metropolitan District in East of England · Last updated April 2026
Harlow is one of England's post-war new towns, designed by Sir Frederick Gibberd and built from the 1940s around the historic core of Old Harlow. The town is notable for its pioneering modernist architecture, extensive green wedges, and public art collection — including works by Henry Moore, Auguste Rodin, and Barbara Hepworth.
With 10 conservation areas, no Article 4 directions, and 179 listed buildings, Harlow's heritage includes both its medieval origins and its new town design legacy. The Green Belt surrounding the town constrains outward growth, with the Harlow and Gilston Garden Town development to the north representing a major planned expansion.
Harlow's 84.8% approval rate and 95.1% on-time householder performance reflect a well-functioning planning service for this compact new town.
Planning a project in Harlow? Start here.
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What can I build in Harlow?
| Project type | Likely permitted development | May need planning permission | Likely needs planning permission |
|---|---|---|---|
| Rear extension (single storey) | Most of Harlow outside protected zones | Properties near boundaries or Green Belt fringe areas | Conservation areas (10), listed buildings |
| Rear extension (two storey) | Most of Harlow outside protected zones, if within 3m limit | Check distance to boundary ≥7m or Green Belt fringe areas | Conservation areas (10), listed buildings |
| Side extension | Detached houses outside protected zones | Semi-detached properties (half-width rule) | Conservation areas (10), 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 Harlow | Front-facing rooflights in conservation areas | Listed buildings |
| Outbuilding / garden office | Most of Harlow outside protected 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 Harlow (internal works) | If changing external appearance significantly | Listed buildings |
This is general guidance based on Harlow's planning constraints. Your specific property may differ — use our free PD checker to get a result tailored to your address.
Permitted development in Harlow
Harlow has no Article 4 directions, so most properties retain full permitted development rights outside conservation areas. The Green Belt around the town is the main constraint for properties on the town's edges. The new town housing stock — with its characteristic green wedges, neighbourhood centres, and hatches — generally has generous gardens that make PD compliance straightforward. Properties in the 10 conservation areas face additional heritage controls.
What Harlow expects from your project
Local Plan: Harlow Local Plan 2011–2033
Harlow District Council adopted its Local Plan in December 2020. Harlow is a post-war New Town with a distinctive character shaped by its original master plan by Frederick Gibberd. The plan supports significant housing growth including the Harlow and Gilston Garden Town, a new settlement of up to 16,000 homes to the north of the town.
Emerging / replacement plan
The Harlow Local Plan was recently adopted. The council is monitoring delivery of the Harlow and Gilston Garden Town alongside Hertfordshire authorities.
14 Article 4 directions
Harlow has applied Article 4 directions to 14 areas, which remove certain permitted development rights in those zones. Use our free checker to see if your property is affected.
Conservation areas in Harlow
10 designated conservation areas
Harlow's 10 conservation areas include both the medieval village of Old Harlow and parts of the new town recognised for their architectural significance. The new town conservation areas protect Frederick Gibberd's pioneering post-war design, including The Lawn (England's first residential tower block) and the town centre. Old Harlow's conservation area covers the medieval high street and surrounding historic buildings. These areas require development to respect the distinct character of each period.
Article 4 directions in Harlow
14 Article 4 direction areas
Listed buildings in Harlow
There are 179 listed buildings in Harlow. 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 Harlow's conservation team before starting any work on a listed property.
Planning application statistics
Year ending September 2025 | Source: MHCLG planning application statistics
Harlow received 288 planning applications and decided 231 in the year ending September 2025. The approval rate of 84.8% 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.
Harlow's 84.8% approval rate is close to the national average for a compact new town authority. The 95.1% on-time rate for householder decisions and 90.5% delegation rate show solid processing, though the delegation rate is lower than many authorities, meaning more applications go to committee. With 288 applications received and 231 decisions made, Harlow has one of the smaller caseloads in Essex.
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 Harlow
Browse what's been approved near you
Seeing what similar projects have been approved near your property can help you understand what Harlow expects in terms of scale, materials, and design. It's also useful for gauging how quickly the council processes applications.
Search planning applications on Harlow'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 Harlow
Housing Delivery Test 2023 measurement | Source: MHCLG
Harlow delivered 1,504 homes against a requirement of 964 over the three-year measurement period, giving a Housing Delivery Test score of 156%. This is above the 95% threshold, which means there are no government-imposed consequences for housing under-delivery. Planning applications in Harlow are assessed on their own merits under standard planning policies.
Lawful Development Certificates in Harlow
A Lawful Development Certificate (LDC) is formal confirmation from Harlow 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.
Harlow decided 122 householder applications in the year ending september 2025. Their 8-week performance of 95.1% 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 Harlow
You can apply for a Lawful Development Certificate through the Planning Portal or directly through Harlow'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
Harlow 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 Harlow.
Pre-application advice in Harlow
Harlow 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 →Harlow offers pre-application advice for householder and larger developments. Contact the council for current fees.
Planning fees and timelines in Harlow
| 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 Harlow and may change. Building regulations fees are separate — see the building control section below.
Building regulations in Harlow
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 Harlow is provided by Harlow Council Building Control. You can also use a private approved inspector instead of the council's service.
Building control contact
Harlow planning department
Your building project checklist for Harlow
- Check if your property is in a conservation area — Harlow has 10 conservation areas. Use our free checker or see the list above.
- Check for Article 4 directions at your address — Harlow has 14 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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