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.
Compare extension with a smarter combination of glazing and storage.
Which trade-off matters?
A larger glazed area can visually open the room but remove useful wall space. Compare window divisions and bespoke storage together, including curtains or other screening.
What the drawing needs to explain
Draw fixed furniture, sightlines and opening windows together. Allow room for screening so it does not later obstruct cupboards, heaters or passages.
Decide this before construction
Choose layout and storage needs before fixing window divisions. Then coordinate lighting and connection points with the remaining usable walls.
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.