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 how an addition meets the actual condition of existing material.
Which trade-off matters?
Full renewal creates a uniform appearance, while targeted repair preserves more existing material. Compare both using a sample area and assess technical compatibility too.
What the drawing needs to explain
Mark intact, damaged and unassessed areas on photographs. Add the old-to-new junction detail with proposed materials and treatment.
Decide this before construction
Start with a survey and trial repair, reviewing the result before treating the whole surface. Protect retained elements while removing adjoining material.
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.