Cotswolds barn conversion cost
Costs verified against BCIS Online (May 2026 release) and ONS Construction Output Price Index, April 2026. Class Q rules current to the 21 May 2025 GPDO amendment.
Cotswolds barn conversion lands at £2,580-£3,120/m² mid spec, including the AONB design premium (~18% over the BCIS national stone band). Class Q is closed; full planning is the only route.
£/m² band
Applying the 1.18 Cotswolds AONB multiplier to the BCIS stone band (£2,180-£2,640/m², May 2026) gives £2,572-£3,115/m². A 200 m² mid-spec Cotswolds conversion lands at roughly £585,000-£760,000 all-in before VAT431C reclaim.
Cotswold stone repointing and re-roof
Cotswold stone repointing
£75-£130 / m² elevation
Stone-slate roof
£260-£380 / m² roof
Salvaged Cotswold stone (repairs)
£190-£320 / m² walling
Refusal patterns
Class Q is unavailable in the AONB. Full planning casework focuses on landscape impact, external materials and openings. Refusals cluster around proposed new fenestration in elevations visible from public rights of way.
Sources cited on this page