206 S William St, Mount Prospect, IL 60056 Property Records

Cook County property record for 206 S William St, Mount Prospect, IL 60056

Property Summary

Property Type	Single Family Home
Details	4 bd · 1.5 ba · 1,712 sqft · built 1953
Lot Size	0.18 acres (7,850 sqft)
Owner	Trust Name on File
Last Sale	$688,500 (Feb 2025)
Tax Bill	$9,661 (2023)
Deeds & Mortgages	May 2024 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`08-12-215-016`

Property Details

APN / Parcel Number

Primary APN	`08-12-215-016`
Alternative APN	`08-12-215-016-0000`

Interior

Bedrooms	4 Beds
Full Baths	1.5 Baths
Half Baths	1 Half Bath
Total Rooms	7 Rooms
Stories	1 Story
Building Area	1,712 sqft Living Area

Exterior

Year Built	Built 1953
Effective Year Built	Effective 1954
Architectural Style	Bungalow
Exterior Material	Brick/Stone
Construction Type	Masonry / Concrete Block
Roof Material	Asphalt
Lot Area	7,850 sqft (0.18 acres)
Garage Type	Detached
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	HVAC

Location & Zoning

Street Address	206 S WILLIAM ST
City	MOUNT PROSPECT
State	IL
Zip	60056-3325
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Range	11E
Legal Township	41N
Legal Section	12
Legal Subdivision	MORNINGSIDE GARDENS
Jurisdiction	COOK IL
Township / Civil Division	ELK GROVE
Census Block Group	2
Census Block	2005
Census Tract	804901

Owner

206 S William St is owner-occupied and held in a trust since February 2025.

Source: Cook County records, as of May 27, 2026

Owner of Record	Trust Name on File
Mailing Address	206 S WILLIAM ST, MOUNT PROSPECT, IL 60056-3325
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust, Revocable Trust

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Feb 6, 2025 · Amount on File
Deed Sale	Feb 6, 2025 · Amount on File
Prior Sale	May 1, 2024 · Amount on File
Deed Document Number	202518231
Record Updated	Oct 29, 2026

May 2024: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	COOK IL
Recording Date	May 1, 2024
Property Address	206 S WILLIAM ST, MOUNT PROSPECT, IL 60056-3325
Document Number	0012214205
Instrument Date	Apr 10, 2024
Instrument	2412214205
Transaction Type	Transfer
Record Updated	May 14, 2024
Title Company	TRULY TITLE INC, TRULY TITLE

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$320.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	604 TORTE COTTA AVE #196 # 196, 196, CRYSTAL LAKE, IL 60014

Mortgage

Document Number	0012214206
Date	May 1, 2024
Instrument	2412214206

Lender

Name	COVANTAGE CU
Type	Credit Union

Agreement

Type	Commercial Mortgage
Amount	Amount on Record

Interest

Rate Type	Adjustable Rate

Tax Assessment & Valuation

Source: Cook County assessment roll, as of May 27, 2026

Property Jurisdictions

Type	Name
State	Illinois
County	Cook County
County Subdivision	Elk Grove Township
Municipality	Mount Prospect Village
Secondary School District	Township High School District 214 (09 - 12)
Elementary School District	Mount Prospect School District 57 (PK - 08)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2025		$43,001 Land $9,028 Building $33,973	$430,010 Land $90,280 Building $339,730
2023	$9,661.00 (+4.32%)
2022	$9,261.00 Homeowner's exemption	$37,999 Land $7,457 Building $30,542	$379,990 Land $74,570 Building $305,420

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Flood

FEMA maps place 206 S William St in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 2011.

Source: FEMA National Flood Hazard Layer, effective February 11, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Community Rating System	Class 6 (20% premium discount)
Nearby Flood Policies	3 in force
Nearby Flood Claims	1 (2011)
Claims Outside the SFHA	1 of 1
Most Recent Claim	Jul 2011 · river or lake flooding

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.

Wildfire

The area around 206 S William St has no burnable land within ember reach, so its wildfire risk is not rated.

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Not rated no burnable land within ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	MOUNT PROSPECT serves 41,000 people · EPA ID IL0311980
Water Source	Purchased surface water from NORTHWEST SUBURBAN MUNICIPAL JAWA
Last State Inspection	Aug 2025
Lead	2 ppb (2026–2028) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	11 last 3 years

Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes. The service area is an EPA estimate; the actual supplier may differ.

Internet Providers

Source: FCC Broadband Data Collection, based on 612 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Astound Broadband Cable	1,500 / 50
Verizon Fixed Wireless	1,000 / 75
T-Mobile Fixed Wireless	100 / 20
AT&T Fixed Wireless · DSL · Fiber in parts of the area	100 / 20