The £16m facility, which will replace the nearby Trowbridge Community Hospital, is expected to open to patients in 2026.
Sue Harriman, chief executive, Bath and North East Somerset, Swindon and Wiltshire Integrated Care Board, said: ‘Trowbridge is a growing town, and one with a diverse, often under-served, population, and we are confident that this new centre, which will make accessing care easier, will go some way in helping to address many of the health inequalities felt by local people.'
The existing minor injuries unit at Trowbridge Community Hospital, along with the site's X-ray department, will be among the services that will transfer to the new facility.
Wiltshire Council has provided £3m for the project through its community infrastructure levy, which local authorities claim from developers to help boost growth in a specific local area.
Cllr Ian Blair-Pilling, cabinet member for public health, said: ‘It was a privilege to attend this groundbreaking event and witness the progress being made towards delivering essential health facilities for our residents.
‘By strategically using funds from the Wiltshire community infrastructure levy, we are ensuring that contributions from local developments are reinvested directly into projects that have a tangible and lasting impact on our communities.'