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Do i need planning permission?

Planning regulations for domestic extensions in England are governed by national guidelines, but local councils may have supplementary planning documents (SPDs) that provide additional guidance tailored to their specific areas. Below is an overview of the general rules, along with specific considerations for St Helens, Warrington, Wigan, Manchester, and Liverpool.

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General Permitted Development Rights in England:

Under the Town and Country Planning (General Permitted Development) (England) Order 2015 (as amended), certain extensions can be built without the need for planning permission, known as “permitted development,” provided they meet specific criteria:

Single-Storey Rear Extensions:

Must not extend beyond the rear wall of the original house by more than 4 metres for detached houses, or 3 metres for other houses.

Maximum height of 4 metres.

Multi-Storey Rear Extensions:

Must not extend beyond the rear wall of the original house by more than 3 metres.

Must be at least 7 metres from the rear boundary.

Side Extensions:

Single-storey only, with a maximum height of 4 metres.

The width must not exceed half the width of the original house.

General Limitations:

Extensions must not cover more than half the area of land around the original house.

Materials should be similar in appearance to the existing house.

No verandas, balconies, or raised platforms are permitted.

For detailed guidance, refer to the Planning Portals listed at the bottom of this page.

Local Authority Guidelines:

While national rules apply, local councils may have additional guidelines to ensure extensions are in keeping with the area’s character.

Wigan:

The “House Extensions Design Guide” points out that extensions should not adversely affect the house, neighbours, or the streetscape.

It provides detailed advice on various extensions, including rear, side, and front extensions, as well as considerations for listed buildings and conservation areas.

Warrington:

The “House Extensions Supplementary Planning Document” outlines design principles to ensure extensions harmonize with the existing dwelling and surrounding area.

It covers aspects such as space around dwellings, design, impact on neighbours’ amenities, and specific guidelines for different types of extensions.

Manchester and Liverpool:

Both cities adhere to national permitted development rights but may have specific local planning policies, especially in conservation areas or for listed buildings.

It’s advisable to consult the respective city councils’ planning departments for detailed guidance. ( see links at the bottom of this page.)

St Helens:

Specific guidelines may be available through the St Helens Council’s planning department.

Contacting the council directly or visiting their official website will provide the most accurate information.

Recent Developments:

As of December 2024, the UK government announced plans to ease planning laws, allowing homeowners to build loft extensions and add extra storeys more easily. These reforms aim to alleviate the housing crisis by encouraging upward building. Extensions must complement surrounding buildings and protect local heritage. For more details, refer to the recent news article:

Recommendations:

Consult Local Planning Authorities: Before proceeding with any extension, it’s crucial to consult your local planning authority to ensure compliance with both national and local regulations.

Consider Neighbours: Ensure that your proposed extension does not adversely affect your neighbours’ light, privacy, or amenity.

Professional Advice: Engaging with a planning consultant or architect can provide tailored advice and assist with the planning application process.

By adhering to both national and local guidelines, you can ensure that your domestic extension project proceeds smoothly and in compliance with all relevant regulations.