The burglary took place overnight between Tuesday 28 and Wednesday 29 July.
Police say that hundreds of pounds worth of equipment was stolen, including a Makita drill, a Bosch drill, batteries and site radios.
Guernsey Police is asking for anyone with information to contact PC 145 Kershaw or to contact Crimestoppers anonymously on 0800 555 111.
Pictured top: Pictures of items similar to those stolen, supplied by the police.
