About Us

Established in 1965 F.G. Fennell has been providing mechanical, plumbing and heating solutions for a diverse range of clients. In 2012 our mechanical division was established, where we have since been carrying out projects for government departments, local and county authorities, leading builders, developers and architects throughout the Eastern region.

We have an in-house CAD engineer, fully versed in the current software (AutoCAD & Revit/3D) and regulations, who can provide fast, accurate designs, fully coordinated M&E drawings with supporting cable, containment and lighting calculations, pipework and duct work routes as required.

Operating throughout East Anglia, we offer a full design of mechanical, plumbing, heating and electrical services. Electrical services are carried out by our affiliated company, Lowestoft Electrical Group Limited.

Our work force comprises of highly skilled trade registered personnel together with a management team with over 35 years practical experience in the industry. Our directly employed design and management team provide a totally reliable, honest and accountable service that is ready to provide a flexible response.

All our work is guaranteed and underwritten with appropriate commercial liability and indemnity insurances.

Our mission is to provide our employees with an honest and healthy work environment. We are committed to the philosophy of partnering with the entire supply chain to ensure the smooth running and completion of all projects.

Employees individually and collectively can dedicate themselves to operating an ethical business whilst providing our customers with exceptional workmanship and service second to none. We actively encourage our employees to believe in our mission and to continue their personal development.

We are dedicated to environmental improvements that foster a sustainable future and lead to social and economical improvements in the community we do business.

Our commitment to these values will allow F.G. Fennell to become the Premier Service Company in East Anglia, see our accreditions below:

Gas Safe

Gas Safe Register is the only official gas registration body of gas businesses and engineers in the United Kingdom, Isle of Man and Guernsey. By law all gas businesses must be on the Gas Safe Register to ensure only those qualified engineers are licensed to legally work on gas.

Constructionline Gold

Constructionline Gold membership has increased level of scrutiny and assurance. We assess a company’s credentials for environmental management, quality management, equal opportunities, modern slavery act adherence and anti-bribery and corruption policies. Some of these policies form part of the Cabinet Office Selection Questionnaire (SQ), which the public sector is expected to comply with.


OFTEC stands for the Oil Firing Technical Association. It is a ‘competent persons scheme’ which recognises installers who are approved to install oil, solid fuel and renewable heating equipment and to main oil and solid fuel systems.


Passionate about health and safety, Acclaim Accreditation specialises in the award of SSIP (safety schemes in procurement) certification.