Explain what problem the extension should solve
Write down three concrete goals, such as dining with six people, a separate workspace or downstairs sleeping. Prioritise them if budget or plot size imposes limits. A contractor can suggest a more suitable alternative when the desired outcome matters more than one particular form.
Gather this information
| Bring | Why it helps |
|---|---|
| Floor plan and construction year | Helps discuss the existing layout. |
| Interior, exterior and rear-access photos | Shows junctions and access. |
| Desired external size and furniture | Connects the building size to everyday use. |
| Known services and earlier alterations | Helps identify missing information. |
| Budget and preferred timing | Clarifies choices and dependencies. |
Measure access, not just the building position
Follow the route from the street to the extension and note gates, bends, trees, eaves and level changes. Photograph both directions. Delivering components and removing soil may need different routes. The contractor must assess feasibility; your information prepares that assessment.
Separate questions from decisions
Mark confirmed choices and questions in the design, such as foundations, permissions or door positions. After the visit, record outstanding investigations, responsibilities and when results are needed. This prevents a preliminary sketch being treated as a final instruction.