Many homeowners with single storey properties look to add a new upper floor to create extra bedrooms, bathrooms, or a larger living space. The cost depends on the condition of the existing structure, the type of roof you have, and the amount of structural steel or foundation work required.
- Structural assessment and engineering
A structural engineer checks whether your current walls and foundations can support the extra storey.
Example: In Edinburgh bungalows, it is common to add steel beams to support the new first floor without rebuilding the foundations. - Roof removal and rebuild
The existing roof is removed and replaced with a new floor structure and roof design.
Example: A simple gable roof is usually more cost effective than a full roof-lift with dormers. - Layout, services, and finishes
Costs vary based on how many rooms you add, whether you include a bathroom, and the quality of finishes.
Example: Adding plumbing for an upstairs en suite increases the budget slightly but adds significant value. - Typical cost ranges in Scotland
Most upper floor extensions in Edinburgh fall between £80,000 and £180,000, depending on size and specification.
Example: A two bedroom and one bathroom upper floor is usually at the mid-range of this bracket.
Final Thoughts
An upstairs extension can transform a single storey home and add long-term value, but costs depend heavily on structure and design. At Sawmill Contracts, we guide you through engineering, planning, and construction to ensure your new first floor is safe, well designed, and seamlessly integrated with your existing home.