What this work involves
An extra storey changes more than the roof. The existing structure, staircase position, escape arrangements and installation routes need to be considered together. Establish what the building can support before settling the design.
- Existing structure and foundation assessment
- Stair opening and usable room layout
- Roof shape and neighbouring buildings
- Facade materials, windows and insulation
- Lifting, scaffolding and temporary weather protection
Use the following design considerations when coordinating this service with a wider project. Agree which parts apply to your request.
Assess additional glazing in an extension alongside use on sunny days.
Which trade-off matters?
More glazing does not automatically call for active cooling. Compare window size, shading and use first, then assess which technical provisions are appropriate.
What the drawing needs to explain
Record window orientation, opening elements and existing shade. Add the main use periods so a specialist can assess the comfort question concretely.
Decide this before construction
Discuss glazing, shading and ventilation before finalising facade or roof openings. Coordinate required service routes before closing internal finishes.
Cost factors for this service
Include design, investigations, structural work, the new envelope and internal finishes. Additional strengthening can change the budget.
Bring this to the discussion
Existing plans, photographs of roof and facades, intended rooms and information about earlier alterations.
Questions about the work
Is every flat roof suitable for another floor?
No. The building, its foundation and the rules for the property are decisive. Structural assessment and a location-specific permit check belong in the preparation.
The design situations here illustrate choices; they are not completed projects or a diagnosis of your property.