What this work involves
Start with the space you need in daily life. Place furniture and walking routes on the plan before deciding the external dimensions. A deeper extension is not automatically better: daylight in the existing part deserves equal attention.
- Dimensions and position of the extension
- Existing rear wall and structural changes
- Foundation, floor build-up and connection to the house
- Glazing, rooflights, shading and ventilation
- Kitchen, heating and electrical layout
Use the following design considerations when coordinating this service with a wider project. Agree which parts apply to your request.
Relate a new room to existing doors and interior proportions.
Which trade-off matters?
Making every surface perfectly uniform can remove recognisable details. Compare local repairs with full renewal and agree where small dimensional differences may deliberately remain visible.
What the drawing needs to explain
Prepare a detail sheet for the door, frame, skirting and wall together. Identify retained elements, refinished surfaces and locations requiring bespoke work.
Decide this before construction
Dismantle retained elements only with an agreed recording and storage plan. Take final bespoke measurements after assessing the adjoining substrate.
Cost factors for this service
Size, foundation method, access, structural work and finishes determine the budget. Ask for drawings, installations, demolition and garden reinstatement to be identified separately.
Bring this to the discussion
A floor plan, photographs, approximate dimensions and a short list of requirements.
Questions about the work
Can I stay at home during the extension?
It depends on the work. Discuss when the existing wall is opened, how the house is protected from dust and rain, and which facilities become unavailable.
The design situations here illustrate choices; they are not completed projects or a diagnosis of your property.