Willmott Dixon has boosted turnover by 43% from £413.5m to £592.4m in 2008
The contractor, which does 70% of its work in the schools and higher education markets, increased pre-tax profit by 18% from £10.1m to £11.9m.
Including the contribution from social housing firm Inspace, which the company took private last year, turnover was £839m.
Chairman Colin Enticknap said concerns remained about government spending beyond the middle of 2010.
He said: “Efforts have begun to build market share in other sectors, retail and leisure being two good examples.”
The company ended the year with net assets of £29m.