Extension Builder and Director Fined After Dangerous Gas Work

HSE Prosecution Highlights Severe Gas Safety Breaches

A building firm and its director have been handed significant fines after constructing a residential extension directly over existing gas pipework and a boiler flue. Adam’s Building Construction Ltd failed to relocate the hazardous gas infrastructure despite receiving repeated warnings regarding the danger. The resulting structure was deemed immediately dangerous by inspectors, forcing Northern Gas Networks to isolate the property’s gas supply to prevent a potential explosion or carbon monoxide poisoning.

Following an investigation by the Health and Safety Executive (HSE), the contractor further compounded its legal exposure by failing to comply with an official HSE Improvement Notice. The company’s director was also held individually responsible for failing to exercise due diligence and ensure basic safety compliance on site.

Contractor Accountability and Site Safety Compliance

This prosecution underscores the stringent enforcement approach taken by the HSE against sub-standard trade practices. When structural modifications obscure or enclose live gas appliances and flue outlets, the immediate risk to occupants and neighbouring properties is severe. The decision to prosecute both the corporate entity and the individual director reflects a ongoing regulatory push to hold site managers personally accountable for catastrophic safety oversights.

What This Means for UK Tradespeople and DIYers

What does this mean for a UK tradesperson or DIYer actually buying this kit — does it change what they should pay, buy, or watch out for?

For builders, Joiners, and general contractors, this ruling reinforces that you cannot treat gas infrastructure as an afterthought or rely on uncertified modifications. Before breaking ground or ordering building materials like steel, timber, and masonry for an extension, you must factor in the relocation of utilities by qualified professionals. When quoting a job, always ensure the client budget covers a Gas Safe registered engineer to sign off on flue clearances and pipework relocations; cutting corners to lower project quotes leaves you exposed to criminal prosecution, massive fines, and invalidates your tradesperson liability insurance.

Reported by HSE — original article