Scenario

Heritage Statement for a Barn Conversion (UK, 2026)

Reviewed by

Oliver Wakefield-Smith

Founder, Digital Signet

Last reviewed 22 June 2026 · Refreshed quarterly

Direct answer

Does a barn conversion need a Heritage Statement?

If the barn is listed, curtilage-listed (per LBCAA 1990 s.1(5)), within a conservation area or in the setting of a designated asset, yes , a Heritage Statement is required. Class Q permitted development for agricultural-to-residential conversion does not exempt the asset from heritage scrutiny where it is designated. Non-designated barns outside conservation areas can usually proceed under Class Q without a heritage submission.

Worked scenario

Curtilage-listed stone threshing barn, conversion to single dwelling

Sample wording

“The barn is a curtilage-listed structure within the curtilage of the principal Grade II listed farmhouse, pre-1948 in date and physically attached to the principal range. Its significance lies primarily in evidential value (surviving threshing-floor cobbles, original roof structure) and in aesthetic value as a contributor to the agricultural group. The proposed conversion retains the threshing floor in situ under a glass-floor reveal, retains the original roof structure exposed, and inserts new openings only on the rear elevation where a 20th-century opening already exists.”

Likely outcome

LPAs are generally supportive of conversion proposals that respect the asset's evidential value (retention of historic fabric in place) and minimise new openings on principal elevations.

Mitigation pattern that has won consent

In-situ retention of historic floor surfaces, exposure of original roof structure rather than concealment, sympathetic fenestration strategy (slot windows behind cattle-doors, principal elevation untouched), and a 'light-touch' insulation strategy that does not over-clad historic stone walls.

Class Q and heritage

Class Q (agricultural buildings to dwellings) is a permitted-development right under the GPDO. It is NOT available where the building is listed, is a scheduled monument, or is in an Article 2(3) area (conservation areas, national parks, AONBs, the Broads, World Heritage Sites). For curtilage-listed barns, Class Q does not apply and a full LBC plus Heritage Statement is required.

Significance assessment for a barn

Date of construction (pre-1850 generally carries higher significance).
Surviving fabric (threshing floor, queen-post or king-post roof, original loft floors).
Group value with the principal farmhouse and other ancillary buildings.
Evidence of agricultural process (winnowing, threshing, cattle stalls).