about us

Who are we?


Harrison How Limited have been serving our clients since 1939. Our engineers have decades of experience between them on all aspects of electrical and mechanical work. 


Why are we different?


Our offices are situated in the heart of London. We are a company that takes on all aspects of electrical and mechanical work regardless of size. We will have an engineer come to you in London within the hour for a breakdown while our other engineers are completing installation work on large offices. We offer competitive rates and a free quotation on works.


Our engineers:


Our engineers are trained in all aspects of electrical and mechanical work. They have extensive knowledge of all electrical and mechanical systems. Working in around London with it's a mixture of old and new, there is nothing our engineers haven't seen. Our staff will always go above and beyond for our clients to give you the absolute best service.


Where do we serve?


Although primarily based in London and within the M25, we regularly work in Kent, Essex and Hertfordshire. Our engineers have worked all over the country and abroad.


Where do we work?


Our work includes installation, refurbishment and maintenance of offices, banks, livery halls, sheltered accommodation, shops, art galleries, churches, restaurants and many more. 




We are fully NICEIC registered for electrical works and on the F gas register for air conditioning. Our staff are all fully trained in electrical and air conditioning services as well as holding ECS cards, PASMA and working at heights certification, manual handling, asbestos awareness and are first aid trained. We have £10 million employers liability and public liability insurance.