Stunning 70+ acre Cape Cod Estate - family retreat - possible B & B! Multi-acre parklike setting surrounding home and outbuildings. Home features 8000 +/- square feet, a dramatic 2 story paneled library w/loft, exquisite Christopher Peacock gourmet kitchen with Wolf and Subzero, incredible custom millwork throughout, great room or a main floor master w/French doors to deck, full bath, walk-in closets & fireplace, an in-law or guest suite, 4 or 5 bedrooms, 5 full baths and 2 half bath. Estate includes a separate 7000+/- sf commercial recreational/workshop building w/heat/air, full bath, multiple work areas, kennel, greenhouse and drive-thru garage that will accommodate a full bus plus a pole barn. The recreational building could be used for any number of business possibility, since it is fully temperature controlled with large overhead doors. Approximately 48 acres are in crop and leased. Land is suitable for horses or other livestock and is fully fenced. Multiple parcels and the far west parcels are a lot of record - possibly buildable. There is an option to buy the property with less acreage (27 acres) - call for pricing. Close to Rockford, Lake Geneva, Harvard, Woodstock - 10 minutes to Metra train, shopping and medical services. See additional information for Features and Detail.
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Market trends in 61012, IL
Last updated September 2026
Buyer's Market
Seller's Market
Seller's market
Sale-to-List Price
100.2%
+0.2% MoM
Median sale price
$245K
$28K MoM
Avg. days on market
28d
5 days MoM
Recently sold homes
9
3 MoM
Provided by Redfin
Sale history for 16556 County Line Rd
Date
Event
Price
MRED as Distributed by MLS Grid #09183479
Jun 19, 2016
Listing Removed
—
MRED as Distributed by MLS Grid #09155704
Jun 19, 2016
Listing Removed
—
MRED as Distributed by MLS Grid #09190491
Jun 19, 2016
Listing Removed
—
MRED as Distributed by MLS Grid #09183473
Jun 19, 2016
Listing Removed
—
MRED as Distributed by MLS Grid #09155682
Jun 19, 2016
Listing Removed
—
MRED as Distributed by MLS Grid #09136712
Apr 3, 2016
Listing Removed
—
MRED as Distributed by MLS Grid #09136708
Apr 3, 2016
Listing Removed
—
MRED as Distributed by MLS Grid #09032005
Mar 3, 2016
Listing Removed
—
MRED as Distributed by MLS Grid #09031985
Mar 3, 2016
Listing Removed
—
Year
Property tax
Land + Additions
Assessment*
2025
$23,597 (+4.1%)
$43,300 + $282,101
$325,401
2024
$22,659 (−9.3%)
$43,300 + $282,101
$325,401
2023
$24,996 (+2.2%)
$43,267 + $257,421
$300,688
2022
$24,463 (+3.0%)
$43,236 + $242,459
$285,695
2021
$23,749 (+44.5%)
$43,186 + $227,016
$270,202
2020
$16,430 (−37.5%)
$43,186 + $220,417
$263,603
2019
$26,302 (+8.2%)
$43,455 + $216,217
$259,672
2018
$24,298 (−8.7%)
$40,928 + $222,555
$263,483
2017
$26,611 (−2.2%)
$38,699 + $209,810
$248,509
2016
$27,212 (−5.7%)
$37,728 + $198,009
$235,737
2014
$28,850 (+4.1%)
$41,358 + $213,684
$255,042
2013
$27,712
$41,392 + $213,683
$255,075
Tax history for 16556 County Line Rd
Year
Property tax
Land + Additions
Assessment*
2025
$23,597 (+4.1%)
$43,300 + $282,101
$325,401
2024
$22,659 (−9.3%)
$43,300 + $282,101
$325,401
2023
$24,996 (+2.2%)
$43,267 + $257,421
$300,688
2022
$24,463 (+3.0%)
$43,236 + $242,459
$285,695
2021
$23,749 (+44.5%)
$43,186 + $227,016
$270,202
2020
$16,430 (−37.5%)
$43,186 + $220,417
$263,603
2019
$26,302 (+8.2%)
$43,455 + $216,217
$259,672
2018
$24,298 (−8.7%)
$40,928 + $222,555
$263,483
2017
$26,611 (−2.2%)
$38,699 + $209,810
$248,509
2016
$27,212 (−5.7%)
$37,728 + $198,009
$235,737
2014
$28,850 (+4.1%)
$41,358 + $213,684
$255,042
2013
$27,712
$41,392 + $213,683
$255,075
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Public record
Public record
Zoning
Beds
4
Baths
6.5
Stories
2
Lot width
—
Lot depth
—
Lot size
3,049,200
Year renovated
2002
Sq. Ft.
8,836
Year built
1985
Style
Single Family Residential
County
Boone County
APN
04-12-200-011
Parking Spaces
16
Basement
Yes
Accessible
No
HOA Dues
—
Garage
Yes
Features
Green, Waterfront
Last updated by owner on Sep 15, 2026.
A-1
Agricultural Preservation Area District
The agricultural preservation area district is intended to maintain, enhance, and conserve prime agricultural soils and historically farmed soils, to protect sensitive natural features, and to prevent the uncontrolled, uneconomical spread of nonagricultural development, which results in excessive costs to the county for the provision of essential public services.