Bevan Ashford has reported a provisional turnover figure of £31.5m for the last financial year, an increase of 18 per cent.
Chief executive Nick Jarrett-Kerr says that the profit margin will be more than 30 per cent.
He says: "It's not just the numbers, it's the quality of work that we are increasing. We're very pleased with the progress. It was entirely on budget.
"Projects is really taking off. We've had some stunning cases in commercial litigation, and in property we have been retained to advise the South West Regional Development Agency."
Head of PFI and projects Stephen Hughes says: "We've had growth of more than 25 per cent in projects. We're taking a growing share in the market and increasingly our growth is on the private sector side and in markets which are outside our traditional area of healthcare."
The year saw rapid growth in London. Three lateral hires give the office a total of five partners.