Trading standards chiefs are investigating a complaint that a “cowboy” builder built a £14,000 conservatory over a public sewer.

The conservatory, in Keighley, faces demolition – leaving the householder thousands of pounds out of pocket – if the authorities need to access the sewer.

A spokesman for West Yorkshire Trading Standards said the matter was under investigation.

However, he said it was one example of the growing number of complaints about “rogue builders”.

He said: “In recent cases reported to trading standards, the standard of work has been so poor, the householder has had no option but to pay for its removal and start again.”

Recent cases have included a builder who placed his company in liquidation six months after starting work on a £65,000 two-storey extension.

The project was abandoned in an “incomplete and unsafe state” despite the homeowner having already paid £74,000.

The spokesman said people who are thinking of having work carried out at their homes should find reputable traders.

They should ask for and check written references and contact trade organisations, in particular those whose members offer insurance-backed guarantees.

Graham Hebblethwaite, chief officer of West Yorkshire Trading Standards Service said: “My advice is to choose builders very carefully.

“They should insist on written contracts detailing works to be carried out. Substantial advance cash payments should be avoided and professional advice should be sought where appropriate."

Anyone believed to be a rogue builder should be reported to Consumer Direct on 08454 04 05 06.

  • Read the full story in Wednesday's T&A