Cook County property record for 221 N William St, Mount Prospect, IL 60056
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 830 sqft · built 1954 |
| Lot Size | 0.2 acres (8,721 sqft) |
| Owner | Individual Name on File |
| Last Sale | $185,000 (Sep 2014) |
| Tax Bill | $4,917 (2023) |
| Deeds & Mortgages | Aug 2021 Mortgage Aug 2017 Mortgage + 1 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 03-34-424-004 |
| Primary APN | 03-34-424-004 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 4 Rooms |
| Stories | 1 Story |
| Building Area | 830 sqft Living Area |
| 1st Floor Area | 830 sqft |
| Year Built | Built 1954 |
|---|---|
| Effective Year Built | Effective 1955 |
| Exterior Material | Wood |
| Construction Type | Frame |
| Foundation Type | Raised |
| Roof Material | Asphalt |
| Lot Area | 8,721 sqft (0.2 acres) |
| Garage Type | Detached |
| Parking Spaces | 1 Parking Space |
| Cooling System | HVAC |
|---|---|
| Heating System | HVAC |
| Street Address | 221 N WILLIAM ST |
|---|---|
| City | MOUNT PROSPECT |
| State | IL |
| Zip | 60056-2546 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Range | 11E |
| Legal Township | 42N |
| Legal Section | 34 |
| Legal Subdivision | BLUETTS |
| Legal Block | 10 |
| Legal Lot Number | 25 |
| Jurisdiction | COOK IL |
| Township / Civil Division | WHEELING |
| Census Block Group | 3 |
| Census Block | 3026 |
| Census Tract | 802802 |
221 N William St is owned and occupied by an individual who acquired it in July 2021.
Source: Cook County records, as of May 27, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 221 N WILLIAM ST, MOUNT PROSPECT, IL 60056-2546 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Aug 17, 2021 | Intrafamily Transfer, Transfer · Conventional Mortgage FIRST CENTENNIAL MORTGAGE CORP |
| Aug 10, 2017 | Deed of Trust, Mortgage · Conventional with PMI FIRST CENTENNIAL MTG CORP |
| Jul 28, 2017 | Quit Claim Deed, Transfer Quitclaim |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Sep 4, 2014 · Amount on File |
| Deed Sale | Sep 4, 2014 · Amount on File |
| Prior Sale | Jan 12, 2012 · Amount on File |
| Deed Document Number | 201442065 |
| Last Transfer Date | Jul 30, 2021 |
| Transfer Doc | 0000034231 |
| Record Updated | Oct 29, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | COOK IL |
| Recording Date | Aug 17, 2021 |
| Property Address | 221 N WILLIAM ST, MOUNT PROSPECT, IL 60056-2546 |
| Document Number | 0022934231 |
| Map Reference | DOC 1464233 |
| Instrument Date | Jul 30, 2021 |
| Instrument | 2122934231 |
| Transaction Type | Transfer |
| Record Updated | Aug 26, 2021 |
| Title Company | NEAR NORTH TITLE GROUP, NEAR NORTH TITLE |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 221 N WILLIAM ST, MOUNT PROSPECT, IL 60056-2546 |
| Document Number | 0022934232 |
|---|---|
| Date | Aug 17, 2021 |
| Instrument | 2122934232 |
| Name | FIRST CENTENNIAL MORTGAGE CORP |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Aug 1, 2051 |
| Rate Type | Fixed Rate |
|---|---|
| Rate | 3% |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | COOK IL |
| Property Address | 221 N WILLIAM ST, MOUNT PROSPECT, IL 60056-2546 |
| Document Number | 1724115048 |
| Instrument Date | Aug 10, 2017 |
| Transaction Type | Mortgage |
| Record Updated | Sep 12, 2017 |
| Title Company | PROPER TITLE LLC |
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
| Address | 221 N WILLIAM ST MOUNT PROSPECT IL 600562546, MOUNT PROSPECT, IL 60056-2546 |
| Document Number | 1724115048 |
|---|---|
| Date | Aug 29, 2017 |
| Instrument | 24115048 |
| Name | FIRST CENTENNIAL MTG CORP |
|---|---|
| Address | AURORA, IL 60506 |
| Type | Conventional with PMI |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Aug 28, 2047 |
| Rate Type | Fixed Rate |
|---|---|
| Rate | 4.37% |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | COOK IL |
| Recording Date | Jul 28, 2017 |
| Property Address | 221 N WILLIAM ST, MOUNT PROSPECT, IL 60056-2546 |
| Document Number | 1720916054 |
| Instrument Date | Jul 25, 2017 |
| Instrument | 20916054 |
| Transaction Type | Transfer |
| Record Updated | Aug 11, 2017 |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
| Address | 221 N WILLIAM ST MOUNT PROSPECT IL 600562546, MOUNT PROSPECT, IL 60056-2546 |
Source: Cook County assessment roll, as of May 27, 2026
| Type | Name |
|---|---|
| State | Illinois |
| County | Cook County |
| County Subdivision | Wheeling 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) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $24,000 Land $7,849 Building $16,151 | $240,000 Land $78,490 Building $161,510 | |
| 2023 | $4,917.00 (+4.64%) | ||
| 2022 | $4,699.00 | $20,999 Land $6,322 Building $14,677 | $209,990 Land $63,220 Building $146,770 |
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.
FEMA maps place 221 N William St in Zone X, an area of minimal flood risk, though there have been 9 flood claims nearby since 1993.
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 | 1 in force |
| Nearby Flood Claims | 9 (1993–2020) |
| Claims Outside the SFHA | 9 of 9 |
| Most Recent Claim | May 2020 · other causes |
| Claims by Event |
|
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.
The area around 221 N 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.
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 |
| 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.
Source: FCC Broadband Data Collection, based on 579 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 |
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