Building Services Engineering

—Integral building maintenance and installation in the South West—

ISO 9001 · ISO 14001 · OHSAS 18001

Our services

We can provide electricians, plumbers and qualified engineers for electrical, gas, air conditioning, ventilation, plumbing and fire alarms work in Devon. We have experience in small and big projects. Learn more about our departments below:
Electrical Department

We have over 40 years experience of Electrical installations and maintenance on properties as diverse as National High Street Retail Chains, Radar Stations, Schools, Hospitals Universities and Prisons and just about every type of building in between.

HavMain undertakes all aspects of commercial and industrial installation works from additions of single sockets through to complete multidisciplined projects.

Fire Protection Department

With over 30 years of experience in fire alarms system design, installation, commissioning, maintenance and testing of fire alarm systems (including fire extinguishers) and security alarm systems.

We have plenty of experience in carrying out jobs for Nursing homes, Hospitals, Hotels, Universities, Schools and colleges, National retail chains, Property Services, Banks, Leisure facilities among others.

Mechanical Department

All our gas engineers and plumbers are Gas Safe registered, which is a legal requirement for professionals working with gas. They all are qualified professionals with years of experience.

Our installers will make sure your appliances meet all gas safety and building regulations and that you have all the documentation you may need to sell or rent your property.

About Havmain

Building services engineering in the South West of England

HavMain is a Building Services Engineering company offering design, installation, maintenance and commissioning services for the South West of England.

We can provide electricians, plumbers and qualified engineers for electrical, gas, air conditioning, ventilation, plumbing and fire alarms work in Devon, Cornwall and further afield.

Our speciality is providing preventative maintenancecontracts to companies who also require a 24 hour 365 day reactive call out service to maintain and repair building services.

Our specialist Fire Alarms department can also provide total fire alarms solutions, inspection and maintenance contracts and a competitive fire alarms installation cost.


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Neil Harper
Electrical Department Manager
Neil has worked for the company for over 30 years and has been involved in the supervision of national installation and maintenance contracts for the last 13. Prior to that he worked on estimating electrical and mechanical installation and maintenance projects.
John Wickens
Fire Protection Department Manager
John has specialised in supervising Fire Alarm systems installation and maintenance for the last 13 years and he has worked for HavMain for 35 years. Before specialising in Fire Protection he worked on supervision of electrical maintenance and installation projects.
Lloyd Cosway
Mechanical Department Manager
Lloyd has graduated twice in separate fields of Building Surveying, including European Building Studies. These professional qualifications underpin his practical knowledge and experience along with 12 years as a fully qualified commercial gas service engineer.
Christopher Havill
Managing Director
Chris has worked as a Director for the company for the last 8 years. He graduated from the University of Southampton with a BEng(Hons) in Electromechanical Engineering specialising in Robotics. In addition to directing the operations of the business Chris oversees multi-site regional maintenance for our larger customers and coordinates blue chip installation contracts.
Stephen Havill
Stephen graduated from the University of Bath in Electrical Engineering and joined the company in 1974. He subsequently became a Chartered Engineer in 1989. His experience includes Mechanical and Electrical installations in Radar Stations, Prisons, Hospitals, Universities, Dockyards, MOD establishments, Schools, Radio Stations and working as an expert witness.


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