Trulia Inc., the real estate-information website, is teaming up with Web publisher Primedia Inc. as it expands in the online apartment rental listings market.

Primedia, the parent of ApartmentGuide.com, will give Trulia users access to more than 5 million rental listings in addition to those already available, the companies said today in a statement. Trulia is also taking over advertising sales for Primedia’s inventory.