Zoopla Property Group says it delivered record levels of appraisal leads to its agent members over the first half of 2015 via a tool which allows home owners to contact local agents for a valuation with a view to instructing them.

Since January, prospective vendors and landlords have already sent over 135,000 enquiries to Zoopla member agents requesting appraisals, up 40% on the same period last year, and potentially worth £100m in fees.

Jon Notley, commercial director at ZPG, said: “Home movers are increasingly using our websites to identify and select local agents for valuation purposes.

“Any agent not on our platform and therefore not visible in our unique appraisal tool will be losing out on these valuable leads and instructions as well as missing out on insight into those in their local market who are looking to move.

“The record level of appraisal leads and instructions we are delivering once again highlights the exceptional value we offer our members.”

Separately, OnTheMarket has re-affirmed that it has not dropped its ‘one other portal’ rule.

A new letter of intent is inviting prospective members to show their support once OTM has 7,500 members. An email says that by showing their intention now, they would not have to drop a portal or make any financial commitment “at present”.

Ian Springett, chief executive of OTM, said: “In less than five months, OnTheMarket.com has significantly changed the portals market and continues to grow in size and momentum with 4.4m visits to the website in June.

“The email quoted simply refers to a new option for agents to show their support for OnTheMarket.com by signing a letter of intent.

“This approach was used to great effect in successive pre-launch phases.

“The letters of intent represent a commitment to join Agents’ Mutual when overall support for its OnTheMarket.com portal reaches 7,500 offices. The one other portal rule remains in place.”

Springett also said that Hitwise data for OTM traffic in May was inaccurate, and that OTM achieved 4.1m visits.