Donald Insall Associates has completed a merger with York-based conservation practice Ferrey & Mennim. The announcement coincides with the firm’s attainment of Certified B Corporation status.

Ferrey & Mennim, established 102 years ago, is known for its work on conservation, residential, and ecclesiastical projects, including St Magnus Cathedral and Hull Minster. The practice’s three-person team has joined Donald Insall Associates’ York studio as part of a succession strategy designed to ensure the continuation of its work in line with the firm’s core values.

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