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.
Include intended interior details in the design of additional space.
Which trade-off matters?
A minimal joint or concealed fixing may need extra coordination. Compare the intended appearance with tolerances, maintenance and replaceability before treating a detail as straightforward.
What the drawing needs to explain
Draw one bespoke junction at a large scale with every adjoining finish layer. Identify who takes final dimensions and which substrate must be ready for that measurement.
Decide this before construction
Approve material combinations and the sample detail before production. Complete work affecting dimensions before ordering final bespoke components.
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.