If you want your mother-in-law close when she visits, but not actually in your house, a new apartment building guest suite may be the answer.

The big picture: On top of amenities like multiple pools, pickleball courts and planned events, some high-end apartment buildings in Chicago are luring in renters by offering on-site, fully furnished apartments that residents can rent for visiting friends and family.

State of play: Optima apartments in Streeterville, Wrigleyville and Wilmette have one- and two-bedroom apartments that are fully furnished with cooking supplies, cutlery, dishwashers and washers and dryers, making it more like an Airbnb.

• Plus the building has multiple pools, hot tubs, gyms, saunas, pickleball courts and recreation areas.
• And parking is included.

Between the lines: The arrangement could be especially appealing for international renters who have family visiting for long periods or new parents who want grandparents nearby (but don’t want to share a wall).

By the numbers: A two-bedroom is $375 on weeknights and $400 on weekends.

• A one-bedroom is $325 on weeknights and $375 on weekends.

Reality check: Suites at the Fairmont from Thursday to Sunday range from about $285–$350 before taxes and parking, according to the hotel website.

The bottom line: On-site guest apartments may become another amenity buildings offer as the rental market heats up.