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.
Include an addition in a complete logistics and protection plan.
Which trade-off matters?
Running many trades simultaneously can appear to save time but increases pressure on access and working space. Compare parallel work with a deliberate sequence by building section.
What the drawing needs to explain
Combine the design plan with logistics for storage, deliveries and protected zones. Identify who approves each interface before the next stage begins.
Decide this before construction
Use release points between work sections: design complete, substrate assessed, concealed work recorded and finishes ready. The next party starts from an agreed condition.
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.