Revenue hit 117.9 million pounds in the six months to the end of March.
But half-year profits fell 25 percent due to the acquisition of market intelligence tool HomeTrack, which took place at the start of the year.
Full-year pre-tax profit is expected to rise 9 percent to 50 million pounds in the year to the end of September according to a Thomson Reuters poll of nine analysts.
The firm said traffic to its sites hit a record high of 314 million visits in the period and agents rose 6 percent to 14,271 branches, as the portal wins back agents from rival OnTheMarket.
(Reporting by Costas Pitas; editing by Kate Holton)