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 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
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.