Schofield Lothian, based in Hertfordshire, also established consultancy divisions in building regulation approval, town planning and environmental services during 2000/1, as well as securing project management for Cirque du Soleil at Battersea Power Station.
Turnover increased to more than £11m, an increase of more than £360,000 on 1999/2000, the 14th year of growth.
The rise was partially driven by work in the Far Eastern and European markets.
Turnover in the Far East rose 21.5% to £1m and the figure for Europe went up 32% to £900,000.
Schofield Lothian warned that a prolonged recession was the biggest threat to its business, and could be harmful as the company continues to expand.