Architectural Heritage Impact Assessments (AHIA) are prepared to accompany design proposals for new build or alterations which may impact a Protected Structure, and are often an obligatory planning requirement. During the planning process, a local authority will check if the building is listed on the Record of Protected Structure (RPS) or within an Architectural Conservation Area (ACA). I have carried out AHIA reports for over a decade on houses, churches, hospitals, prisons, lime kilns and complex multi-period buildings.AHIA 1

The purpose of the AHIA is to provide the planning authority with sufficient information to determine the architectural significance of a building, site or structure, the relationship and any impact of the proposed alterations or new build on the architectural heritage, and may suggest possible mitigatory measures.

Protected structures include a wide range of buildings including dwellings, public and ecclesiastical buildings, bridges, harbours, mills and other buildings and features contained within their curtilage. The architectural heritage impact assessment allows a building owner to understand and clearly communicate the heritage value of their building and what impact, if any, and proposed work may have on the building. A small number of buildings also include elements of earlier buildings such as tower houses, churches and medieval houses which may also require an Archaeological Impact Assessment.

If you require an architectural heritage impact assessment or other form of conservation report, please contact me at