The contract also requires Gifford to provides workshops, training, and high-level briefing documents for the council and any contractors it hires.
Gifford's senior project manager Gerald Williams said: "Framework agreements are operated by many local authorities throughout the country.
"For us, they represent a radical change by our corporate building services department in procurement of the capital programme. All our client departments can make use of the framework for their construction projects."
Williams, along with Gifford's Oxford director Matthew Tyrell, negotiated the original deal to handle the Council's projects from Gifford's Oxfordshire branch.
Principle engineers Martin Merritt and Steve Lumb will be the main point of contact at Gifford for anyone working on projects with the council.
Lumb said: "Although we will be the main point of contact for the council, anyone from its projects team can call us for help and advice."