One of the biggest mortgage lenders in the U.S. said it would pay $1.75 billion to buy a well-known real-estate brokerage. The deal, once it goes through, could have major consequences for millions of home buyers.

Rocket Cos. is pushing deeper into the property market with a deal to buy Redfin Corp. that values the real estate listing site at $1.75 billion.

Dan Gilbert's Rocket says it wants to build an all-in-one home buying experience with the purchase, "from search to close."

Redfin is being acquired in an all-stock transaction that values the real estate listing platform at $1.75 billion.

Rocket Companies announced a $1.75 billion deal to acquire Redfin. The mortgage titan hopes to leverage Redfin to take market share.

Redfin CEO Glenn Kelman on the benefits of joining Rocket: "Homes.com is running a Super Bowl ad, and Redfin might not be able to afford that. At least not on our own, but Rocket ran a Super Bowl ad."