Jonathan Mansell is a Chartered Building Surveyor and Principal within Avison Young’s Building Consultancy team, operating across the Bristol and Cardiff offices. He supports a wide range of commercial property clients throughout the South West and South Wales, offering tailored advice on all aspects of building surveying. His expertise spans project management, technical due diligence, condition surveys, planned maintenance strategies, dilapidations, party wall matters, feasibility studies, and project monitoring.

Jonathan brings over 25 years of experience in the commercial real estate sector, combining deep regional knowledge with a practical, detail-oriented approach. He has successfully led projects for occupiers, landlords, and investors, helping them manage property risk and maintain asset value across diverse portfolios.

Notable projects include acting as Employers Agent and Project Manager for a £19m demolition and new-build office development achieving BREEAM ‘Outstanding’; leading a £3.5m structural repair to a collapsed retaining wall bordering a main road and retail park; and managing numerous new build and refurbishment projects for the military. He has also served as Project Monitor for a £13m car showroom development and led large-scale acquisition surveys across various sectors. Additionally, he has delivered nationwide retail fit-out programmes and acted for both landlords and tenants in complex dilapidations cases.

Jonathan is known for delivering responsive, high-quality service and plays a key role in supporting Avison Young’s clients across the wider Bristol and Cardiff property markets.