Extensions and conversions affect the existing building as well as the new space. A strong brief explains the purpose, approximate size, connection to the current home, service requirements and the status of any drawings or approvals. This helps separate early feasibility questions from construction pricing.
Explain the intended use
- Describe whether the new space is a bedroom, living area, office, bathroom, flat, garage conversion or entertainment area.
- State the approximate floor area and the rooms or facilities required.
- Explain how the extension should connect to the existing building.
- Mention privacy, accessibility, parking or rental-use requirements that influence the design.
Gather existing property information
- Provide the property address and photographs of the proposed area.
- Include any existing drawings, previous approved plans or site information available to you.
- Photograph boundaries, roof connections, ground levels and access routes.
- Mention known drainage, damp, structural or foundation concerns.
Separate design from construction
- Record whether you need concept design, measured drawings, plan preparation, submission support or construction only.
- Do not ask a builder to assume responsibility for professional design work that has not been completed.
- When drawings exist, issue the same version to every contractor quoting.
- List items still undecided so they can be shown as allowances rather than hidden assumptions.
Plan the construction impact
- Explain whether the property will remain occupied.
- Discuss temporary weather protection where the existing building will be opened.
- Identify likely water, electricity, security and access disruptions.
- Ask how changes, hidden conditions and additional work will be documented and approved.
Frequently asked questions
Can I request a building quote before drawings are complete?
An early budget discussion may be possible, but a comparable construction quotation needs a defined scope and suitable drawings or specifications.
What should be included in the photographs?
Show the proposed extension area, the wall or roof connection, boundaries, access, ground levels and relevant rooms inside the existing building.
How should design and construction enquiries be separated?
Use one brief for professional design and plan services and a separate construction brief based on the completed information. This keeps responsibilities clear.