Library, South Main and Pierce Park
Block group 2 of tract 4464 holds the Chelsea District Library, Chelsea Hospital, Pierce Park and the Pierce Lake Golf Course and Park, and points checked at each fall in ZIP 48118 inside the city limits. American Community Survey figures for 2020 to 2024 show a median owner-occupied value of $339,200 with a margin of error of $29,943, a median year built of 1976 and 1,065 homes, of which 651 are detached houses and 184 are attached.
TimberTown Park, Veterans Park and Lanewood
Block group 2 of tract 4462 runs along M-52 north of the center and holds TimberTown Park, Veterans Park at M-52 and Sibley, and the spot OpenStreetMap labels Lanewood, each checked as ZIP 48118. The American Community Survey shows a median owner-occupied value of $256,500 with a wide margin of error of $61,055 and a median year built of 1938 with no margin reported, so read both as rough. Of its 464 homes, 436 are detached houses.
Fairgrounds and the west side
Block group 1 of tract 4462 covers the west side, where OpenStreetMap maps the fairgrounds and a residential area labeled Pines, both checked as ZIP 48118. Its median owner-occupied value is $266,300 (margin of error $28,338) and its median year built is 1983. Of 958 homes, 290 are detached houses, 170 are attached and 338 sit in buildings of 20 or more units, the largest share of apartment-style buildings among the four city block groups.
Dog park and the northeast edge
Block group 1 of tract 4464 takes in the northeast edge of the city, where the City of Chelsea Dog Park sits in ZIP 48118. The American Community Survey puts the median owner-occupied value at $344,200 (margin of error $33,426) and the median year built at 1982. Of 360 homes, 323 are detached houses and 28 are attached, and the survey counts 351 owner-occupied homes and no renter households, with a margin of error of 11 on that count.
Guthrie and western Sylvan Township
Block group 2 of tract 4470 covers western Sylvan Township around the hamlet OpenStreetMap labels Guthrie, checked as ZIP 48118, and its parcels carry Sylvan Township's rate, not the city's. The American Community Survey shows a median owner-occupied value of $333,500 (margin of error $42,040) and a median year built of 1991. Of 495 homes, 342 are detached houses and 113 are mobile or manufactured homes, so a purchase here can involve a manufactured home loan.
Cavanaugh Lake, Sylvan Township
Block group 4 of tract 4470 holds Cavanaugh Lake west of the city, which Census boundaries place in Sylvan Township, and the lake point checks as ZIP 48118. Parcels here are taxed by Sylvan Township. The American Community Survey shows a median owner-occupied value of $466,500 (margin of error $49,998) and a median year built of 1984. Of 676 homes, 648 are detached houses and 581 are owner-occupied.
McLaughlin and Cassidy lakes, Lyndon Township
Block group 2 of tract 4450 sits in Lyndon Township north of the city, where OpenStreetMap maps McLaughlin Lake and Cassidy Lake, each checked as ZIP 48118. The American Community Survey shows a median owner-occupied value of $358,400 (margin of error $25,981) and a median year built of 1979. All 702 homes are detached houses and 609 are owner-occupied. Lyndon Township's Chelsea School District homestead rate for 2025 is 37.4014 mills.
Park Lyndon, Lyndon Township
Block group 1 of tract 4450 reaches the northern part of Lyndon Township, where OpenStreetMap maps the county park Park Lyndon, checked as ZIP 48118. The American Community Survey shows a median owner-occupied value of $330,100 (margin of error $41,562) and a median year built of 1981. Of 427 homes, 423 are detached houses and 339 are owner-occupied. The Chelsea School District row for Lyndon Township also sits beside a Stockbridge Community Schools row.
Fourmile Lake, Lima Township
Block group 1 of tract 4480 covers part of Lima Township east of the city. Fourmile Lake checks as ZIP 48118 while Baker Woods Preserve, in the same block group, checks as 48130, so the ZIP depends on the street. The American Community Survey shows a median owner-occupied value of $494,700 (margin of error $55,772) and a median year built of 1982. Of 732 homes, 719 are detached houses and 581 are owner-occupied.