Redfin's (NASDAQ:RDFN) first-quarter results show that the technology-powered residential real estate brokerage continues to gain share in the $31.8 trillion U.S. housing market. Its low fees are resonating with home sellers and its online marketplace is enjoying strengthening network effects, helping to drive its revenue sharply higher.

Surging traffic

Redfin's market share increased to 0.73% of U.S. existing home sales by value, up 0.15% from the first quarter of 2017. The company's low commissions continue to fuel its expansion.

"What drove that growth is the power of our 1% pricing for listing a home," CEO Glenn Kelman said in a press release. "Being able to sell homes for more money at a lower fee is a major competitive advantage, and it's easy for consumers to understand."

Redfin is pressing this advantage by ramping up its marketing investments. This helped to drive a 28% year-over-year spike in traffic to its website and mobile apps.

A new listing for-sale sign in front of a house

Home sellers are flocking to Redfin's digital platform. Image source: Getty Images.

In all, Redfin's revenue jumped 33% to $79.9 million. That topped the company's forecast for revenue of $74.6 million to $78.4 million.

Growth investments are suppressing profits

Still, gross profit fell 11% to $5.7 million, with gross margin declining to 7% from 11% in the year-ago period. Redfin is hiring more agents to reduce the number of average homebuying customers each agent serves, which the company believes will improve customer satisfaction and closing rates. In the meantime, however, these personnel costs are weighing on margins. 

All told, adjusted (non-GAAP) net loss came in at $36.4 million, or $0.44 per share, compared to a loss of $28.1 million, or $0.40 per share in the prior-year quarter. That was within Redfin's guidance of net loss between $38.7 million and $35.9 million.

Looking forward

For the second quarter, Redfin is guiding for revenue of $134.8 million to $139.1 million -- representing year-over-year growth of 29% to 33% -- and net income of negative $1 million to positive $1.5 million.

"If this formula of low fees, happy customers, and increased advertising keeps working, the result will be not just more Redfin listings, but a better online marketplace," Kelman said. "Several new businesses also had strong sales, which we believe can develop into major sources of growth for us not just over the next few years, but for the next decade."

To Kleman's point, as more sellers list their homes on Redfin's platform, the more attractive it becomes to homebuyers. And the more buyers there are searching for homes on its platform, the more attractive it becomes to sellers. It's a classic network effect, and it's helping to fuel Redfin's growth and strengthen its competitive position.

Moreover, with a disruptive business model built upon its low commissions -- and a market share that's still less than 1% of the multitrillion-dollar U.S. real estate market -- Redfin has a massive growth opportunity ahead.

The company is wise to sacrifice short-term profits in order to rapidly expand its operations. By doing so, Redfin is positioning itself to create greater long-term value for its shareholders. And with such a large addressable market and clear competitive advantages, Redfin appears poised to deliver strong returns to patient long-term investors.

Joe Tenebruso has no position in any of the stocks mentioned. The Motley Fool recommends Redfin. The Motley Fool has a disclosure policy.