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29 Salisbury House London Wall
Phone: 020 7638 2383
Fax: 020 7628 4033


At Harrison How we specialise in all Electrical work as well as Air Conditioning, Lighting, Security and Fire Alarm design, installation and maintenance. We have been based in the City of London since 1939 and have been members of the National Inspection Council for electrical installation contracting since 1964.

We have received a Grade A pass on each annual inspection since that date. UKAS-accredited January 2002,Part P approved Dec 2004. Whilst we undertake minor breakdown and maintenance work we also carry out larger installations.

We have replaced the mains infrastructure to Salisbury House and have recently completed other similar sized contracts. Although a small-to-medium sized contractor, we are fully conversant with running contracts as both main and subcontractor.

We work regularly in offices, banks, schools, sheltered accommodation, shops, art galleries, churches and restaurants. We also maintain several buildings for estate agents both for general maintenance fire alarm systems and emergency lighting.

Within the City of London we can offer a "within the hour" service for breakdowns and minor repairs. Our main source of work is through recommendation. All enquiries are important to us. We regard no job too small as we are aware that all work is vital to this company's success and that all of our clients provide our livelihood.

Electrical Testing Services 

Appliance Testing, Electrical Inspection, Electrical Installation Testing, Electrical Safety Testing, Electrical Wiring Testing, Emergency Lighting, Fire Alarm Testing, Fixed Installation Testing, Health & Safety Regulation Testing, Lighting Testing.

Air Conditioning Servicing & Installation 

Air Conditioning Installation, Air Conditioning Maintenance, Air Conditioning Repairs, Air Conditioning Testing, Commercial Air Conditioning.

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