What drawings do you need for a planning application?

Start with the council's validation checklist

The drawing package depends on the application and the site. Government guidance describes national information requirements, including a location plan, and the role of local validation requirements. Check the relevant council's current list before fixing the scope. A package suitable for a straightforward house extension may not be sufficient for a listed building or a new dwelling.

The purpose of the drawings is to make the proposal understandable and assessable. They should show what exists, what changes and how the work relates to neighbouring land. Attractive presentation helps, but it does not compensate for missing dimensions or contradictory information.

The core drawing set

An existing survey provides the foundation. Depending on the project, the application commonly includes existing and proposed floor plans, elevations, roof plans and sections, alongside location and site plans. Agree the exact set with your designer rather than treating this as a universal submission list.

Sections are particularly useful where there are sloping sites, changes of floor level, a loft conversion or neighbouring windows close to an extension. A plan alone may not explain how high a roof will appear from the other side of the boundary.

Details that prevent avoidable confusion

• Consistent drawing numbers, dates and revision references.
• A clear distinction between retained, removed and proposed work.
• Dimensions and levels where they are needed to understand the proposal.
• Matching window and door positions across plans and elevations.
• A materials description that relates to the drawings.
• Enough adjoining context to explain the design without misrepresenting neighbouring property.

Before submission, review the drawings as a set. If the kitchen layout changes, does the external door still appear in the same place on the elevation? If the roof becomes deeper, has the section been updated? These checks are simple but valuable.

Supporting documents are site-specific

A planning statement, heritage assessment, tree information, drainage material or other reports may be needed. A Design and Access Statement is required for specified application types, not automatically for every domestic alteration. Identify the required information early so specialist input can influence the design rather than arrive after it is fixed.

Are these also construction drawings?

Usually the planning set is not enough to define all construction work. Junctions, structure, insulation, drainage, services and specifications need a further coordinated stage. A contractor may provide an early estimate from planning drawings, but the assumptions behind that estimate should be clear.

Prepare for the first meeting

Bring the address, any reliable existing plans, photographs and a short brief describing the spaces you need. Mention earlier applications, known drains, trees and access restrictions. We can then quote for the relevant survey, design and submission work, while identifying information that may need another specialist.