LONDON--U.K. real-estate website operator Zoopla Property Group on Thursday became the latest high-profile Internet company to announce plans to float on the London Stock Exchange, in a listing expected to value the company at more than GBP1 billion ($1.69 billion).

The company, which is 52.6%-owned by the newspaper publisher Daily Mail & General Trust PLC, didn't say how much it plans to raise in the initial public offering or give its expected market capitalization.

DMGT said it would sell part of its stake in Zoopla, which claims to have more than 40 million visits a month to its websites and mobile applications. Estate agents LSL Property Services PLC and Countrywide PLC also said they would reduce their stakes.

On a call with reporters, Zoopla's founder and Chief Executive Alex Chesterman declined to give details about the pricing of the IPO.

However, analysts at Liberum Capital, a brokerage, said they valued DMGT's stake in Zoopla at about GBP575 million, suggesting the company could be valued at more than GBP1 billion.

Zoopla, which advertises properties on behalf of estate agents, reported revenue of GBP38.3 million for the six months to March 31, a rise of 26% on the year.

The company, which was founded in 2007, generates the vast majority of its revenue by charging about 19,000 member estate agents monthly subscriptions to advertise properties. It said it plans to drive further growth by launching websites aimed at the overseas and commercial property markets, as well as introducing products and services using its data on historic sales transactions and property listings.

However, Mr. Chesterman said during the call with reporters that Zoopla will continue to concentrate on the U.K. market following its stock exchange listing.

"We're not ruling out the possibility of doing something in other territories at some point in time but for the time being we're focused on the U.K.," he said.

He said Zoopla is benefiting from the shift from print to online advertising and that people are increasingly accessing Zoopla through mobile devices, such as smartphones, with mobile traffic accounting for nearly 60% of visits.

The company's plan to list comes despite jitters among other Internet-related stocks that have floated recently, including online fast-food delivery group Just Eat PLC, whose shares have fallen sharply since April's initial public offering. Zoopla expects its shares to start trading in June and to be included in the FTSE 250, with a media sector classification.

Zoopla could use the money it raises to better compete with Rightmove PLC, a property-website operator that listed in London in 2006 and reported revenue of GBP139.9 million for 2013.

Write to Rory Gallivan at rory.gallivan@wsj.com

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