Loft Conversion Cost in Glasgow: 2026 Price Guide

• Rooflight conversion (houses): £18,000-£31,500
• Rear dormer conversion (houses): £31,500-£46,500
• Hip-to-gable or mansard (houses): £46,500-£70,000+

Tenement roof space is jointly owned

In a Glasgow tenement, the roof and loft space above the top-floor flats are typically common property, shared between all the owners in the block under the Tenements (Scotland) Act 2004 - converting it into a usable loft, sometimes called a "roof space conversion" here, generally needs agreement from the other owners as well as a building warrant, not just the consent of the top-floor flat owner.

Where these conversions do go ahead, they're usually undertaken by the top-floor owner buying out the other owners' shares of the common roof space - a legal and financial negotiation on top of the building work itself, and one worth involving a solicitor in alongside a builder.

For houses outside the tenement core

In Bearsden, Newton Mearns and similar areas with more conventional house stock, loft conversions follow the more familiar rules - a rear dormer not visible from the road usually needs a building warrant rather than full planning permission, though Scotland's specific rules differ from England's, so always confirm with Glasgow City Council rather than assuming an England-focused guide applies.