Turnover hit £23.3m for the six months to September 2014 generating a pre-tax profit of £795,000.
It is a complete turnaround for the firm which was rescues from administration in January 2013 by a management buyout.
Hewlett bosses are now predicting a £43.5m turnover for the full financial year to next March with a pre-tax profit of of £1.05m.
Managing Director Alan Cooper said: “We took advantage of the ‘green shoots’ of recovery coming last year and decided it was time to look at how we were going to grow the business while trying to control the overheads and maximise turnover.
“In under two years the company has delivered continued profitability with all the signs for a promising future ahead.
“The aim now is for a modest level of expansion as there’s still little room for complacency about the economy.
“However the continuing levels of new business offer much encouragement and will give the business the stable platform it needs to continue to grow.”
Hewlett is focusing on residential and commercial development, infrastructure expansion projects and complementary power generation projects.