Cook County property record for 304 N William St, Mount Prospect, IL 60056
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 943 sqft · built 1955 |
| Lot Size | 0.2 acres (8,721 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $280,000 (May 2022) |
| Tax Bill | $5,473 (2023) |
| Deeds & Mortgages | May 2022 Sale & Mortgage Feb 2021 Mortgage + 1 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 03-34-419-015 |
| Primary APN | 03-34-419-015 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 943 sqft Living Area |
| 1st Floor Area | 943 sqft |
| Year Built | Built 1955 |
|---|---|
| Effective Year Built | Effective 1956 |
| 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 | 2 Parking Spaces |
| Cooling System | HVAC |
|---|---|
| Heating System | HVAC |
| Street Address | 304 N WILLIAM ST |
|---|---|
| City | MOUNT PROSPECT |
| State | IL |
| Zip | 60056-2549 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | (BLUETTS) SUB OF PT OF NH SE SEC 34-42-11 |
| Legal Range | 11E |
| Legal Township | 42N |
| Legal Section | 34 |
| Legal Subdivision | BLUETTS SUB |
| Legal Block | 2 |
| Legal Lot Number | 6 |
| Jurisdiction | COOK IL |
| Township / Civil Division | WHEELING |
| Census Block Group | 3 |
| Census Block | 3000 |
| Census Tract | 802802 |
304 N William St is owned and occupied by two individuals who bought it in May 2022.
Source: Cook County records, as of May 27, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 304 N WILLIAM ST, MOUNT PROSPECT, IL 60056-2549 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Unmarried Man |
| Date | Document |
|---|---|
| May 13, 2022 | Warranty Deed, Transfer · FHA Mortgage CARDINAL FINANCIAL COMPANY LP |
| Feb 8, 2021 | Deed of Trust, Mortgage · Conventional Mortgage GUARANTEED RATE INC |
| Aug 3, 2017 | Warranty Deed, Transfer · Conventional with PMI WELLS FARGO BK |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | May 13, 2022 · Amount on File |
| Deed Sale | May 13, 2022 · Amount on File |
| Prior Sale | May 13, 2022 · Amount on File |
| Deed Document Number | 2022301102 |
| Record Updated | Oct 29, 2026 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | COOK IL |
| Recording Date | May 13, 2022 |
| Property Address | 304 N WILLIAM ST, MOUNT PROSPECT, IL 60056-2549 |
| Document Number | 0013301102 |
| Map Reference | DOC 1464233 |
| Instrument Date | Apr 16, 2022 |
| Instrument | 2213301102 |
| Transaction Type | Transfer |
| Record Updated | May 24, 2022 |
| Title Company | STEWART TITLE |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $280.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Tenants by the Entirety |
| Address | 304 N WILLIAM ST, MOUNT PROSPECT, IL 60056-2549 |
| Document Number | 0013301103 |
|---|---|
| Date | May 13, 2022 |
| Instrument | 2213301103 |
| Name | CARDINAL FINANCIAL COMPANY LP |
|---|---|
| Type | Mortgage Company |
| Type | FHA Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Jun 1, 2052 |
| Rate Type | Fixed Rate |
|---|---|
| Rate | 4.75% |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | COOK IL |
| Property Address | 304 N WILLIAM ST, MOUNT PROSPECT, IL 60056-2549 |
| Transaction Type | Mortgage |
| Record Updated | Feb 16, 2021 |
| Title Company | TEK TITLE LLC |
| Name | Verified Name |
|---|
| Document Number | 0003907325 |
|---|---|
| Date | Feb 8, 2021 |
| Instrument | 2103907325 |
| Name | GUARANTEED RATE INC |
|---|---|
| Type | Mortgage Company |
| Address | CHICAGO, IL 60613 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 355 Months |
| Due | Sep 1, 2050 |
| Rate Type | Fixed Rate |
|---|---|
| Rate | 3% |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | COOK IL |
| Recording Date | Aug 3, 2017 |
| Property Address | 304 N WILLIAM ST, MOUNT PROSPECT, IL 60056-2549 |
| Document Number | 1721557105 |
| Instrument Date | Jul 27, 2017 |
| Instrument | 21557105 |
| Transaction Type | Transfer |
| Record Updated | Aug 17, 2017 |
| Title Company | BAIRD AND WARNER TITLE SERVICES INC, BAIRD & WARNER TITLE SVCS INC |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $249.00 |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 9127 POTTER RD #2F DES PLAINES IL 600164881, 2F, DES PLAINES, IL 60016-4881 |
| Document Number | 1721557106 |
|---|---|
| Date | Aug 3, 2017 |
| Instrument | 21557106 |
| Name | WELLS FARGO BK |
|---|---|
| Type | Bank |
| Address | SIOUX FALLS, SD 57104 |
| Type | Conventional with PMI |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Aug 2, 2047 |
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 | $26,000 Land $7,849 Building $18,151 | $260,000 Land $78,490 Building $181,510 | |
| 2023 | $5,473.00 (+4.57%) | ||
| 2022 | $5,234.00 Homeowner's exemption | $22,999 Land $6,322 Building $16,677 | $229,990 Land $63,220 Building $166,770 |
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 304 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 304 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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