Thieves stole £4,700 worth of tools from LJ Green Construction Ltd, in the fourth break-in for the company in four years.
Laurence Green, 42, the company owner, said: "I wouldn't like to guess whether the break-ins are linked, but the thieves were very methodical."
"It has an impact on our business because now we have to spend a lot of money getting new tools."
The police have CCTV of the incident, but if anyone has any further information please call 101.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here