This is general guidance based on standard permitted development rights in England. Rules differ for listed buildings, conservation areas, and properties with Article 4 directions. Always confirm with your local planning authority before starting work.
Do I Need Planning Permission for a Hard Standing in Harrow?
Creating a hard surface area on your property for parking, storage, or general use. The rules are the same as for driveway paving: permeable surfaces are PD, while non-permeable surfaces over 5 square metres need careful consideration.
Planning in Harrow
78%
of planning applications granted
92%
decided within the statutory or agreed time
74%
of householder applications decided within 8 weeks
In the year to December 2025, Harrow decided 1,316 planning applications. 892 of these were householder projects such as extensions, loft conversions and outbuildings, of which 83% were granted.
Planning statistics: MHCLG planning application statistics, the year to December 2025. Conservation area and Article 4 data: planning.data.gov.uk, © Historic England / Crown copyright. Open Government Licence v3.0.
Important: Additional Restrictions May Apply in Harrow
Harrow has 27 conservation areas. These include Canons Park Estate Conservation Area, East End Farm Conservation Area Pinner, Harrow Park Conservation Area, Harrow School Conservation Area Harrow on the Hill, Harrow on the Hill Village Conservation Area, Kerry Avenue Conservation Area. If your property is in a conservation area, some or all permitted development rights may be restricted. For example, you may need planning permission for changes that would normally be permitted, including alterations to the roof, cladding, or extensions visible from a public highway.
Check with Harrow planning department before starting work to confirm whether your property is affected by any special designations.
Permitted Development Rules for a Hard Standing
Whether hard standing is PD depends on the surface type and location. Permeable surfaces (gravel, porous paving, permeable block paving) are PD under Part 1, Class F. Non-permeable surfaces over 5 square metres require planning permission unless they drain to a permeable area within the property boundary. Rear garden hard standing is generally PD.
Conditions
- 1Permeable surfaces are PD regardless of size
- 2Rear garden hard standing is generally PD
- 3Front garden: non-permeable surfaces over 5 square metres require PP unless draining to a permeable area
- 4Must not significantly raise the ground level (over 300mm becomes a raised platform)
Size and Dimension Limits
- No size limit for permeable surfaces
- Non-permeable front surfaces: 5 square metres maximum without drainage provision
When Permitted Development Does Not Apply
- Front garden non-permeable surfaces over 5 square metres without proper drainage need PP
- In designated areas, additional restrictions may apply
- Consider the impact on drainage and flooding for neighbouring properties
- A dropped kerb is a separate application if vehicular access is needed
What About Building Regulations?
Building regulations approval is not usually required
Building Regulations do not apply to hard standing. Adequate drainage should be provided to prevent surface water flooding. This is enforced through the planning system and environmental regulations rather than Building Regulations.
Building regulations are separate from planning permission. Even if your project is permitted development, you may still need building regulations approval. Contact Harrow building control or use an approved inspector.
How to Apply in Harrow
If you need planning permission for your hard standing, you can apply through Harrow's planning department or via the national Planning Portal.
If your project is permitted development and you want written confirmation, you can apply for a Lawful Development Certificate (LDC) from Harrow. This provides proof that your project does not need planning permission, which can be helpful when selling your property.
What Happens If I Build Without Permission?
Low to moderate risk depending on the surface type, size, and location. Non-permeable front garden surfaces are the main enforcement concern. The most common practical consequence is an issue raised during property sales rather than proactive council enforcement.
Frequently Asked Questions
Do I need planning permission for a hard standing in Harrow?
Does a hard standing in Harrow need building regulations?
How do I apply for planning permission in Harrow?
How long does planning permission take in Harrow?
What percentage of planning applications does Harrow approve?
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