chi-lagrange (2) Uptown LaGrange, a new development by Opus in suburban LaGrange.

CHICAGO—Apartment developers throughout Chicagoland remain quite aggressive, and will complete about 8,300 new units by the end of the year, well above the 15-year average and just slightly less than 9,000 units built in 2016, according to a new market report from Marcus & Millichap.