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A full plans application is for major domestic works and commercial projects, and requires the submission of detailed drawings showing the proposed construction.
Whether you need building regulations approval or not, check if you also need planning permission.
A full plans applications is required for more complex domestic building work, alterations and for any commercial premises.
You'll be required to submit detailed drawings, including floor layouts, cross sections and details of construction methods and materials.
Structural calculations may also be required if the work includes structural changes such as loft conversions, removing load bearing walls and the creation of openings.
You can apply and pay for a full plans application online.