T Clarke’s interim figures for the six months to 30 June show the firm has made profits of £5.4m on revenue of £109m, a 39% leap in earnings.

The company’s profit in the first half of 2007 was £3.9m.

Revenue is up 13% on the £96.5m the firm made in the same period last year.

T Clarke listed eight major tenders it had won, including Deutsche Bank’s new offices in London, the Ministry of Defence’s Tidworth Garrison scheme and Cambridge Regional College.

Pat Stanborough, T Clarke’s chief executive, said: “Our plan to diversify the business away from a dependence on the commercial property development sector has gone well and we have a steady flow of work across all the regions we operate in.”

The firm’s order book now stands at £230m, compared with £205m this time last year.

Stanborough said: “Our forward order book is in excellent shape with a strong mix of work due to complete this year and beyond.”