Rightmove delivered to its shareholders a set of dazzling half-year results this morning, showing that its agents are now paying an average of £671 per month – a rise of 13% on the £593 per month they were paying last year.

With the number of advertisers up 3%, there are now 18,995 agents and developers using Rightmove.

Underlying profits are up 22% to £59.6m, with a profit margin of 74.1% – up from last year’s 73% margin. Profits after tax were up 36%, to £46.3m.

Revenues are also up, at £80.4n, compared with £67.2m last year – a rise of 20%. Rightmove says this is driven by a rise in the growth of spend on additional advertising profits.

In this morning’s repeort, it says page impressions on Rightmove are up 13%, to 8.1bn, with inquiries to its advertisers up 327%, to a record 22.3m.

Shareholders will benefit with an interim dividend up by 18% to 13p per share, from 11p last year.

Nick McKittrick, chief executive officer, said: “Rightmove’s popularity goes from strength to strength, with home hunters visiting more often and looking at more property than ever. On the back of this record traffic we’ve increased enquiries to our customers by over 25%.

“The importance of our brand to the British home moving public is stronger than ever with nine out of ten home movers wanting their property to be advertised on Rightmove.

“I am also delighted that the public continue to turn to us first for property information and can now be alerted within minutes of a property coming to market. Our newly released Instant Alerts are just one of the many innovations we’ve already released this year to provide the most engaging experience for home movers and the most effective advertising products, tools and insight reports to help our customers grow their businesses.”

Under the heading “uncertainties, threats and risks”, it says that Rightmove could be vulnerable to greater competition without mentioning Agents’ Mutual by name.

Meanwhile Rightmove has appointed a director who was at Amazon until last month.

Rakhi Parekh has become a non-executive director at the portal with immediate effect.

She was director of UK media at Amazon after holding various other senior positions during her 11-year tenure at the company.

Scott Forbes, Rightmove’s chairman, said: “I am delighted to welcome Rakhi to the Rightmove board.

“Rakhi’s focus on customer experience and innovation across a spectrum of digital products, desktop and mobile platforms will prove invaluable as we continuously improve our proposition for our customers seeking to reach the UK’s largest property viewing audience.”