Planning drawings and Building Regulations drawings are often mentioned together, but they serve different purposes. Understanding the distinction at the start of a project helps set realistic expectations about design, approvals and technical information.
What planning drawings are for
The planning process is mainly concerned with whether development is acceptable in principle and how it affects matters such as appearance, scale, use, neighbours and the surrounding area. A planning submission normally shows the existing property, the proposed design and the information needed for the planning authority to assess it.
Some domestic work may fall within permitted development rights, but this depends on the proposal, the property and any local restrictions. A lawful-development certificate may still be useful evidence. Planning requirements should be checked rather than assumed.
What Building Regulations drawings are for
Building Regulations address technical standards including structure, fire safety, ventilation, insulation, drainage and accessibility. The drawings and specification therefore need more construction detail than a typical planning set.
Depending on the work, the package may include wall, floor and roof build-ups, junction details, drainage layouts, insulation performance and coordination with structural calculations. A structural engineer or another specialist may need to contribute.
One approval does not replace the other
Receiving planning permission does not mean the technical design complies with Building Regulations. Equally, Building Regulations approval does not grant planning permission. A project may require both, one, or neither formal application, but the position must be established for the particular property and proposal.
Why the drawings may develop
Planning drawings often establish the external form and relationship to the existing building. Once the design is accepted, it can be developed into coordinated technical information for pricing, approval and construction. Changes may be necessary as structure, drainage, insulation and buildability are resolved.
A sensible project sequence
- Define the brief, budget and intended use.
- Measure and assess the existing property.
- Check planning constraints and likely approval routes.
- Develop the design and submit any required planning application.
- Prepare Building Regulations information and obtain specialist input where required.
- Use coordinated information for contractor pricing and construction.
Every project is different, and listed status, conservation areas, leasehold restrictions, party-wall matters or covenants may introduce additional requirements.
Technical drawing support for practices and contractors
Hunter Ellis also provides outsourced technical production for architects, surveyors, contractors and developers across the UK. This can include Building Regulations packages, drawing amendments, detail development and responding to Building Control comments—delivered as an extension of the client’s own team where appropriate.
Hunter Ellis provides architectural design and technical drawing services for domestic alterations and extensions. Practices and contractors can also review our outsourced technical support. Get in touch to discuss the property or project.