A house extension can transform the way you use your home, but the planning stage needs to be handled properly. Whether you are planning a larger kitchen, open-plan living space, side extension, rear extension or double-storey addition, the council needs clear drawings and information before it can assess the proposal.

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Some house extensions may fall under permitted development, but many still need a planning application or a lawful development certificate. This depends on the size, position, design, property type, planning history and whether the home is in a more sensitive location.

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Planning issues can arise where:

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• The extension is close to a boundary

• The extension is large or high

• The proposal affects neighbouring windows or gardens

• The design changes the front or side of the house

• The property is in a conservation area

• The house has previous planning conditions

• The roof shape, windows or materials need careful design

• The council needs clearer drawings before it can assess the proposal

• The project includes structural changes, open-plan layouts or major alterations

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Ask PAS About House Extension Plans and Drawings

 

The plans and drawings are one of the most important parts of a house extension project. They explain the proposal to the planning officer and help show how the extension will work in relation to the existing house, neighbouring properties and the site.

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Planning Application Services (PAS) can prepare house extension plans and drawings for homeowners who need to show:

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• What the house looks like now

• What changes are proposed

• The size, position and shape of the extension

• How the extension connects to the existing house

• The proposed internal layout

• The external appearance of the extension

• The roof design, windows, doors and materials

• The relationship to boundaries and neighbouring properties

• Whether the proposal may affect privacy, daylight, outlook or the street scene

• Whether a planning application or lawful development certificate may be needed

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PAS can prepare drawings for:

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• Rear extensions

• Side extensions

• Side-return extensions

• Wraparound extensions

• Double-storey extensions

• First-floor extensions

• Kitchen extensions

• Open-plan kitchen / dining extensions

• Garage-linked extensions

• Extensions to terraced, semi-detached and detached homes

• Extensions in conservation areas or more sensitive locations

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What a House Extension Planning Package May Include

 

The exact information depends on the project, but a typical planning package may include:

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• Existing floor plans

• Proposed floor plans

• Existing elevations

• Proposed elevations

• Site location plan

• Block plan

• Roof plan

• Section drawings where needed

• Street scene drawings where useful

• Materials notes

• Photos of the existing property

• Supporting design notes

• Planning application submission support

• Lawful development certificate support where appropriate

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A clear drawing package helps the council understand the proposal properly and gives you a better foundation for the next stage of the project.

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Why Professional Support Helps

 

Planning requirements are not always consistent. Different councils and different planning officers can ask for different information depending on the site, the design and the local policies.

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Professional support can help you avoid:

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• Submitting unclear or incomplete drawings

• Choosing the wrong application route

• Missing important site or boundary information

• Failing to show the impact on neighbouring properties

• Delays caused by planning officer requests for extra drawings

• Weak presentation of the design

• Confusion between planning drawings and Building Regulations drawings

• Moving forward without understanding the next technical stages

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PAS can help make the proposal clear from the beginning, which can reduce confusion and give the planning officer the information needed to assess the project.

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Full-Service Support from PAS

 

PAS can provide support from the first planning drawings through to the technical stages after planning approval.

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This may include:

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• Initial project review

• House extension plans and drawings

• Planning application support

• Lawful development certificate support

• Help responding to council queries

• Building Regulations drawings

• Structural design coordination

• Structural calculations where required

• Beam, opening and roof structure coordination

• Party wall advice and services where needed

• Building Control submission support

• Practical guidance before building work starts

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A house extension is a major investment, so it is worth getting the drawings, planning route and supporting information right from the start.

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Get expert help with your house extension project

 

Whether you need house extension plans, planning drawings, a lawful development certificate, a planning application or support after approval, Planning Application Services (PAS) can help you understand what is needed and provide a clear quote for the right level of support.

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Tell us what you are planning, send any photos, sketches or existing drawings you have, and we can advise on the next steps.