The London Borough of Harrow covers a varied part of North West London, combining established suburban neighbourhoods, historic centres, traditional housing, commercial areas and more spacious properties near the northern edge of the capital. Harrow planning applications can therefore range from domestic extensions and loft conversions to replacement homes, property subdivisions, commercial alterations and new residential development.

​

The borough includes Harrow, Harrow on the Hill, Pinner, Stanmore, Wealdstone, Hatch End, North Harrow, South Harrow, West Harrow, Rayners Lane, Headstone, Greenhill, Roxeth, Belmont, Canons Park and parts of Kenton, Queensbury and Edgware. Each area has its own mixture of property types, architectural character, planning history and development pressures.

​

In established residential areas such as Pinner, Hatch End, North Harrow, West Harrow, Stanmore and Headstone, planning applications frequently involve rear and side extensions, loft conversions, roof alterations, replacement windows, porches, garages and garden buildings.

​

The acceptability of a proposal may depend on its size, design, materials and relationship with neighbouring properties. Larger extensions and roof alterations can raise issues involving overlooking, loss of light, visual dominance and the effect on the established appearance of the street.

​

Larger plots in Pinner, Stanmore, Hatch End and other lower-density areas may also attract proposals for replacement houses, infill development, new flats or the subdivision of existing properties and gardens. These applications may require careful consideration of access, parking, landscaping, mature trees, neighbouring amenity and local character.

​

Harrow town centre, Wealdstone, South Harrow and parts of Greenhill contain a mixture of shops, offices, flats, transport facilities and redevelopment sites. Proposals in these areas may include changes of use, commercial alterations, new housing, mixed-use buildings and the redevelopment of larger sites.

​

​

Conservation Areas and Local Planning Controls

 

Harrow contains conservation areas, listed buildings and neighbourhoods with distinctive architectural and historic character. Harrow on the Hill is particularly sensitive because of its historic buildings, traditional streets, important views and association with Harrow School.

​

Other parts of the borough contain locally important suburban architecture, mature landscaping and planned residential estates where alterations may need to respect the established form and appearance of surrounding properties.

​

Additional planning controls may affect:

​

• Replacement windows and external doors

• Roof extensions and dormer windows

• Rear and side extensions

• Front extensions and porches

• Boundary walls, gates and railings

• Demolition of buildings or structures

• External insulation and cladding

• Changes to historic architectural features

• Work affecting listed buildings

​

Some properties may also be affected by Article 4 Directions, previous planning conditions or restrictions on permitted development rights. Work that might normally be completed without a formal application could therefore require Harrow planning permission.

​

The northern parts of the borough also include open land and areas protected by Green Belt policy. Proposals in or close to these locations may require additional consideration of landscape character, openness and the effect of development on the surrounding area.

​

​

Using the Harrow Planning Portal

 

The Harrow planning portal can be used to review current and historic planning applications affecting properties and development sites throughout the borough.

​

Users can normally:

​

• Search Harrow planning applications by address or reference

• View submitted drawings and supporting documents

• Check whether an application is pending, approved or refused

• Read decision notices and planning conditions

• Examine the planning history of a property

• Review applications affecting neighbouring sites

• Follow the progress of a current application

• Comment on proposals open for consultation

​

Carrying out a Harrow planning search before preparing a proposal can help identify previous decisions affecting the property and surrounding area.

​

Approved applications may provide useful local context, while refused proposals can reveal concerns involving design, overlooking, loss of light, parking, trees, heritage or the intensity of development.

​

However, approval for another property does not automatically mean that a similar proposal will be accepted. Each application is assessed according to its individual site, planning history, relationship with neighbouring properties and the planning policies applying at the time.

​

​

Harrow Council Planning Search

 

The Harrow council planning search provides access to publicly available planning records, including application forms, drawings, supporting information, decisions and planning conditions.

​

The search can be particularly useful when:

​

• Considering an extension or loft conversion

• Checking whether previous work had planning permission

• Investigating the planning history of a property

• Reviewing proposed development nearby

• Looking for comparable local applications

• Checking planning conditions

• Preparing a new planning application

• Buying, selling or developing property

​

Planning records should be interpreted carefully. A previous approval may have been granted under different planning policies, property circumstances or permitted development rights.

​

​

Harrow Planning Applications

 

The correct application route will depend on the property, the nature of the proposed work and any restrictions affecting the site.

​

Harrow planning applications may be required for:

​

• House and flat extensions

• Loft conversions and roof alterations

• Replacement homes and new dwellings

• Property conversions and subdivisions

• Houses in multiple occupation

• Changes of use

• Commercial and shopfront alterations

• Replacement windows in sensitive locations

• Retrospective development

• Work affecting conservation areas or listed buildings

​

Some smaller projects may qualify as permitted development. A Lawful Development Certificate can provide formal confirmation that proposed or existing development is lawful.

​

​

Preparing a Harrow Planning Application

 

Before drawings are prepared, it is important to establish the correct application route. Depending on the project, this may include:

​

• Householder planning permission

• Full planning permission

• Prior approval

• Listed building consent

• Advertisement consent

• Change-of-use permission

• Lawful Development Certificate

• Retrospective planning permission

​

A complete submission may require:

​

• Location and block plans

• Existing and proposed floor plans

• Existing and proposed elevations

• Roof plans and building sections

• Street-scene drawings

• Design and access information

• Heritage or conservation statements

• Daylight and sunlight assessments

• Transport and parking information

• Tree, landscaping or ecology reports

• Drainage, waste or servicing details

​

Planning Application Support

 

Planning Application Services (PAS) can assist with planning advice, architectural drawings and the preparation and submission of applications for properties throughout Harrow.