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.
Decide whether an addition’s structure becomes a visible interior element.
Which trade-off matters?
An exposed beam makes the construction legible but changes requirements for junctions and services. Compare exposed and concealed solutions using the same structural assumptions.
What the drawing needs to explain
Detail one connection with structural dimensions, visible finishes and adjoining materials. Have required protection measures and service space explicitly assessed.
Decide this before construction
Coordinate the visible detail before producing structural elements. Plan services and finishes early so unwanted boxing does not later surround a deliberately exposed connection.
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.