Architectural design in Bristol
House extension drawings that move a project forward.
Measured, considered planning and technical drawing packages for rear, side and two-storey extensions, developed around the existing home, the intended use and the approval route.
Discuss your extensionDesigned for the existing building
More than a generic set of plans.
Successful extension drawings need to respond to the property, neighbouring development, access, drainage, structure and the way the completed spaces will work. Hunter Ellis combines architectural technology with practical construction and building-surveying experience to identify constraints early and develop buildable information.
Measured survey requirements and the most appropriate planning route are confirmed after reviewing the property and proposed work. Bristol and the surrounding area are the preferred location for site-measured domestic commissions.

Typical scope
Drawing support from initial record to technical package
Existing-property drawings
Measured plans, elevations and sections proportionate to the proposed work and available access.
Design and planning drawings
Existing and proposed information showing the scale, appearance and relationship of the extension to the original home.
Building Regulations information
Technical plans, sections, notes, construction build-ups and coordinated specialist information where included in the agreed scope.
Specification and details
Project-specific notes and junction information that reduce ambiguity when obtaining quotations and constructing the work.
A clear sequence
How the drawing process works
Discuss the brief, property and available information.
Record the relevant existing building where a site survey is required.
Prepare and refine the agreed design or technical package.
Provide final PDF drawings, with two agreed revision rounds included.
Basic drawing commissions are normally completed within 1–4 weeks. Larger projects involving a full measured survey, coordinated technical information and specification may require up to three months. The programme and individually quoted fee are confirmed before appointment.
Planning permission and Building Regulations are different
Some extensions require a planning application; others may fall within permitted development, although restrictions can apply. Building Regulations address technical compliance and may still apply even where planning permission is not required. The required drawings and any application-support role are defined for the individual project.
Read our guide to planning drawings versus Building Regulations drawings, or explore dedicated Building Regulations drawing support.
Start with the property and brief
Planning an extension in or around Bristol?
Send the address, photographs, any existing plans and a short description of the proposed work. Hunter Ellis will review the information and confirm the appropriate next step, scope, fee and programme.
Request a drawing quotationExtension journey
A proposal developed around the existing home
Successful extension drawings resolve more than floor area. Levels, drainage, daylight, structure, circulation, neighbouring property and the way new work meets old construction all influence the design.
1 · Existing information
The brief, planning history, photographs and available drawings are reviewed. A measured survey is arranged where reliable existing information is not available.
2 · Design & consent
Layouts and external form are developed around the agreed brief before the appropriate planning, permitted-development or other consent route is prepared.
3 · Technical package
Where appointed, the proposal is developed into Building Regulations drawings, details and coordinated structural information suitable for the next project stage.
See an extension technical package → Discuss your extension →