Our History Since 1991 we have provided professional electrical contracting services in the GTA. In 1994 we were designated one of four electrical contractors participating in Toronto Hydro's Meter Relocation Program and helped develop a similar but expanded program for Etobicoke Hydro. Ultimately we became one of four "Authorized Contractors" of Toronto Hydro Energy Services Inc. providing service to residential and commercial clients. For many years our core business has been Residential Service with our specialty being Knob and Tube Rewiring however we have expanded and taken on many projects such as Sub Metering (for Apartments Buildings, Condominiums, and Commercial Buildings), Peak Saver Program (sponsored by Toronto Hydro), Retrofit lighting projects on all scales, and most recently have developed a Solar Division. In order to provide a Green future for all with renewable energy, Langstaff & Sloan Inc. will offer all electrical services to you with a courteous, professional staff to take on any project and provide a solution for all your electrical needs at competitive rates.