A situation to test your plan against
A garden room beside a house with distinctive facade details needs a deliberate transition. First record the lines that give the existing building its identity: window heads, roof edges and the scale of its brickwork.
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
Assess an addition in the complete elevation, including existing roof lines.
Which trade-off matters?
Exact reproduction and a clearly contemporary addition are different design choices. Compare their junctions; an almost matching brick or profile can look less coherent than a carefully chosen contrast.
What the drawing needs to explain
Draw a scaled elevation showing existing and new windows together. Resolve the roof-edge, wall and window junction before deciding from an atmosphere image alone.
Decide this before construction
Photograph retained details before dismantling. Check the dimensions of new components against the actual facade before production begins.
Compare the complete intervention
Allow a separate item for making good around the junction. The new wall may be precisely priced while adjustments to existing pointing, mouldings and finishes remain missing.
How to review the result
Review the result close up and from the garden. Check junctions and continuous lines; a neat individual joint says little about the coherence of the entire elevation.
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.
Must an addition use the same style as the house?
Not necessarily. Compare scale, rhythm and material transitions. Review two junction details before choosing reproduction or a recognisably new addition.
The design situations here illustrate choices; they are not completed projects or a diagnosis of your property.