It is the first acquisition by the Essex based contractor since Lakehouse floated on the Stock Exchange in March.
Providor installs, maintains, services and repairs gas metering systems in domestic and commercial properties around the UK.
The specialist firm currently employs 130 staff operating from its head office in Newmarket.
Providor will become part of Lakehouse’s energy services division targeting work in the government’s Smart Metering drive to install and replace 53 million gas and electricity meters nationally over the next five years.
Providor had a turnover of £9m in the year to 31 May 2014 and made a pre-tax profit of £1.3m.
The deal will see Lakehouse pay another £2m for Providor on top of the initial £4.75m depending on performance.
Stuart Black, Executive Chairman of Lakehouse said: “Providor’s specialist skills, client base and business infrastructure gives us a platform for capitalising on the growth opportunities from within the UK energy services industry.
“As stated at the time of Admission, Lakehouse has a proven track record of acquiring and integrating businesses which complement and enhance our organic growth profile.”