House Extension Cost in Edinburgh: 2026 Price Guide

• Single-storey rear extension (houses): £24,500-£53,500
• Double-storey extension (houses): £53,500-£97,000 upwards

House extensions in Edinburgh are largely a question for properties outside the tenement-dominated core - in Corstorphine and similar suburban areas with more conventional semi-detached and detached housing. Inside the World Heritage boundary covering the Old and New Towns, and inside most of the city's tenement stock, adding space typically means internal reconfiguration rather than building outward.

Scotland's separate planning system

Scottish planning legislation is entirely distinct from England's, and building control works through a "building warrant" system rather than England's building regulations approval. An English extension guide's specific size limits don't reliably transfer - always confirm directly with the City of Edinburgh Council.

World Heritage status in practice

Where extensions are possible near the historic core, the World Heritage designation typically means matching materials and respecting sightlines that go well beyond a standard conservation area's requirements - worth building in extra time for consultation with the council's heritage team.