Planning permission and building regulations are often mentioned together, but they are two different systems. A home extension or loft conversion may need one, both or, in some circumstances, neither. It is important to consider them separately before work begins.
What does planning permission cover?
Planning control considers the development and its effect on the surrounding area. This can include the size, siting, appearance and use of a proposal, its relationship with neighbouring properties and relevant local planning policies. Some work may be permitted development, subject to the applicable rules.
What do building regulations cover?
Building regulations set standards for the construction and performance of buildings. Depending on the project, they can cover structural safety, fire safety, energy efficiency, ventilation, drainage, access, stairways and other technical matters.
Can I have permitted development and still need building regulations?
Yes. Permitted development is a planning route. It does not remove the need to comply with building regulations. For example, a rear extension may be permitted development from a planning perspective but still need building regulations approval.
What drawings are used?
Planning drawings explain the proposal to the local planning authority. They commonly show the existing and proposed layout, elevations, site position and dimensions.
Building regulations drawings and specifications provide more technical construction information. The level of detail depends on the project and the chosen application route. They may include construction build-ups, insulation, fire precautions, ventilation, drainage and other specification notes.
Who provides structural calculations?
Where structural calculations or structural design are needed, these must be prepared by a suitably qualified structural engineer. Robert Blake Designs provides planning and building regulations drawings, but does not provide structural engineering or structural design services.
How to plan the process
- Establish the scope of the proposed work and check the planning history.
- Confirm whether a planning application, prior approval or Lawful Development Certificate is appropriate.
- Prepare the drawings and information required for the planning stage.
- Arrange structural engineering input separately where required.
- Prepare building regulations drawings and specifications and submit the appropriate building regulations application.
- Make sure the relevant approvals and technical information are in place before construction.
Building regulations drawings · Householder planning applications · Discuss your project
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