Calculate your loft conversion cost
Loft conversion cost by type in Glasgow
The national source benchmarks below are for typical 30m² projects.
UK £22,500–£30,000£21,400–£28,500
UK £40,000–£60,000£38,000–£57,000
UK £50,000–£70,000£47,500–£66,500
UK £50,000–£80,000£47,500–£76,000
What the regional adjustment changes
What can change a real Glasgow quote?
- Velux, dormer, hip-to-gable, mansard or shell-only type
- Usable new floor area
- Roof structure and existing head height
- New staircase position and specification
- Structural steel and roof alterations
- Ensuite, electrics, heating and finish level
- Region, access and scaffolding
Local planning considerations
Scottish projects can have different regulatory and grant contexts, so check current official rules alongside the cost estimate where relevant.
- Scottish building standards and scheme rules should be checked separately from any England-and-Wales guidance linked elsewhere on the site.
- Tenement or managed-flat work can add common-property, access and approval considerations beyond the physical installation cost.
- Traditional masonry and older fabric may need specialist repair specifications that are not represented by a simple regional multiplier.
How the regional model works
The 0.95× factor places this planning estimate 5% below the national planning baseline. We keep that modelling assumption separate from the dated national benchmark so users can see which part comes from an external source and which part is UK Home Costs modelling.
Sources
Loft Conversion Cost: 2026 UK Price Guide & Breakdown
Published / checked: March 2026
Used for: Loft conversion type benchmarks
Construction output price indices
Published / checked: 13 August 2026
Used for: Construction price trend and update checks
Frequently asked questions
How much does a loft conversion cost in Glasgow in 2026?
Our modelled Glasgow ranges run from about £21,400–£28,500 for a 30m² Velux or rooflight conversion to about £47,500–£76,000 for a 30m² mansard.
How much is a dormer loft conversion in Glasgow?
The modelled planning range for a typical 30m² dormer is about £38,000–£57,000, starting from the current national £40,000–£60,000 benchmark.
Why is the Glasgow estimate different from the UK benchmark?
The 0.95× Scotland factor places the model 5% below the national planning baseline. It is a planning assumption, not an observed city-wide contractor index.
What can push a loft conversion above the modelled range?
Staircase changes, structural steel, low head height, complex roof alterations, an ensuite, premium finishes, difficult access and fire-safety work can increase the final quote.