Grundy County, Illinois

Tax Lien53,835 residents

County research last verified 2026-07. Office holders, platforms, and deposit rules change — re-confirm anything time-sensitive.

Sale typestate default

Tax Lien

Redemption periodstate default

2–2.5 years depending on property type

Investor returnstate default

Up to 36% penalty per 6-month period (bid-down), 18% max per period at auction

Governing statutestate default

35 ILCS 200, Art. 21

Notes

Illinois annual tax-lien county. Grundy County is a Single Bidder County; Treasurer holds the annual property tax sale at the Administration Building (1320 Union St, Morris). 2024 payable 2025 sale held Nov 4, 2025, 9 a.m. Separate sealed-bid tax-deed/trustee auction appears on iltaxsale.com (e.g., Sept 4, 2026). Morris / I-80 industrial and Chicago exurb market.

Auction logistics

Format

In-person annual tax lien sale (single bidder); sealed-bid for trustee deeds

Frequency

Annual certificate sale (fall/early winter pattern); trustee sealed-bid when posted on iltaxsale.com

Platform

Grundy County Treasurer — Tax Sale ↗

Deposit rules

Must register to participate — contact Treasurer 815-941-3215 for registration packet, deposit, and single-bidder affidavit requirements. Redemptions at County Clerk 815-941-3222 (certified funds).

Title risk

Liens that survive the sale

Certificate of purchase only — not ownership. Owner redemption extinguishes claim. Tax deed requires judicial process after redemption expires; federal liens can survive.

Quiet title

Tax-deed petition is the primary clearing step; additional quiet title may be used for insurer comfort.

Deal maths for Illinois

Assessment ratio: 0.3333× of market value
Typical quiet title: $1,800–$5,000 · 5 mo
Recording and transfer: $350

35 ILCS 200/9-145: property outside Cook County is assessed at 33⅓% of fair cash value.

Offices and records

Tax collector

Grundy County Treasurer ↗

815-941-3215

Clerk of court

Grundy County Clerk (tax sale redemption) ↗

815-941-3222

Property appraiser

Grundy County Supervisor of Assessments / tax inquiry ↗

GIS / parcel map

Grundy County property tax inquiry ↗

Areas trending up

Directional read from dated market analysis — not a guarantee, and not a substitute for your own comps.

Morris city / Illinois River core

County seat with industrial and logistics jobs supporting SF demand

Minooka / I-80 west fringe

Chicago exurb spillover with stronger new-construction absorption

Coal City / Diamond corridor

Relative-value workforce housing near industrial employment