The mobile home park market in Grundy County, Illinois
5 registered parks, 754 spaces — what's here, how big it is, and what it's worth. Built from the the Illinois Department of Public Health registry, not from listings.
- 5Registered parks
- 754Total spaces
- 168Median park size
- 210–100 spaces
We don't sell parks and we don't have listings. This page is the registry data a buyer usually can't get in one place — park count, size mix, and the rent rules that cap your upside. For what's actually on the market, you still need a broker or a direct-mail campaign.
Park sizes in Grundy County
Size decides almost everything about a small park deal: what it costs, whether a lender will touch it, and whether you can run it yourself. 2 of 5 fall in the 10–100 space band most first-time buyers target.
| 10–30 spaces | 2 parks |
|---|---|
| Over 150 spaces | 3 parks |
What a park this size earns
A park is priced on its income, not on the land. Take the rent it actually collects, subtract operating expenses to get net operating income, and divide by the cap rate buyers accept locally. At the median 168-space park here, every $25/month of lot rent across every lot is roughly $50,400 a year of gross rent — and at a 7% cap rate, a dollar of NOI is worth about $14 of value.
Run the numbers on a 168-space park
Before you underwrite anything here, check what the law lets you do with rent: the Illinois rent-increase calculator applies the 2026 rules to a park this size, and what other owners run their books on is worth knowing before you inherit someone's spreadsheet.
Rent rules that apply here
Illinois sets no statewide cap on lot-rent increases, and state law bars cities from setting a local one (50 ILCS 825) — but every increase needs 90 days' written notice, and a resident whose new rent would top 45% of household income can defer paying the increase for up to a year while listing their home for sale (765 ILCS 745/6, 745/6.4).
The largest parks in Grundy County
- Shady Oaks MHP — 365 spaces, Minooka
- Burt Estates — 187 spaces, Coal City
- Bookwalter Woods — 168 spaces, Gardner
- Hildy Mobile Home Park LLC — 20 spaces, Morris
- Old Mazon MHP — 14 spaces, Mazon
See all 5 parks in Grundy County →
Common questions
How many mobile home parks are in Grundy County?
5 parks are registered with the Illinois Department of Public Health in Grundy County, Illinois, holding 754 spaces between them. That's the registry count as of July 23, 2026 — it counts licensed parks, not parks currently for sale.
What size are the parks in Grundy County?
The median registered park here has 168 spaces, and 2 of 5 sit in the 10-to-100-space band that small buyers typically target — big enough to cover debt service, small enough to run without on-site staff.
How much can lot rent be raised in Illinois?
Illinois sets no statewide cap on lot-rent increases, and state law bars cities from setting a local one (50 ILCS 825) — but every increase needs 90 days' written notice, and a resident whose new rent would top 45% of household income can defer paying the increase for up to a year while listing their home for sale (765 ILCS 745/6, 745/6.4).
Does Lot Sidekick list parks for sale in Grundy County?
No. This is a directory built from the Illinois state registry, not a brokerage — we don't have listings and we don't take a commission. What's here is the market context you'd want before you go looking: how many parks exist, how big they are, and what the rent rules allow.
Free tools
- Park value & profitability estimator: what the park earns and what it's worth, at the cap rate you pick.
- Rent increase calculator: the 2026 Illinois rules applied to your park.
- RUBS calculator: split one master-meter water bill across your lots so the pennies add up exactly.
- Water submeter calculator: two meter reads in, an at-cost tenant bill out.
- Notice generator: a clean, printable rent-increase notice with the dates filled in.
- Prorated rent calculator: the exact first-month charge when someone moves in mid-cycle.
Source: Illinois Department of Public Health manufactured home communities directory (dph.illinois.gov), as of July 23, 2026. Counts come from the state's registry and can lag real life. See something out of date? Tell us, or claim the page.