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.
Compare additional space now with a possible different room use later.
Which trade-off matters?
Preparing for every future possibility can unnecessarily increase the budget. Compare simple preparation, such as accessible routes and a considered layout, with provisions that might never be used.
What the drawing needs to explain
Draw two uses within the same floor plan. Mark walls, doors and connections that stay unchanged and identify the alteration actually needed later.
Decide this before construction
Choose the current layout first, then assess targeted preparation for later. Record which provisions are installed now and how they remain identifiable and accessible.
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.