The Bradford-based group said sales in the South grew by 21 per cent in the six months to June 30 as it stretches out beyond its Northern heartlands
Underlying pre-tax profits rose from £7.8m to £8.8m and the group will pay out an interim dividend of 3.1p in November.
Safestyle said leads generated from media and on-line marketing grew by 12 per cent to 27,762 as it explores new sales leads.
The volume of frames installed increased by eight per cent to 136,518 and the average unit sales price rose 1.5 per cent to £503.
The firm has grown its market share from 7.85 per cent to 8.24 per cent.
CEO Steve Birmingham said: “Safestyle has enjoyed a successful first half of 2014 during which market share, turnover and profitability all increased.
“We continue to pursue our strategies of expansion in the South and South East and increasing market share.
“We started the second half of 2014 with a strong order book and order intake to date has been as expected, and we remain on course to meet full year expectations.”