Cook County property record for 305 S William St, Mount Prospect, IL 60056
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 1,283 sqft · built 1955 |
| Lot Size | 0.175 acres (7,600 sqft) |
| Owner | 2 Trust Names on File |
| Last Sale | $275,000 (Nov 2020) |
| Tax Bill | $7,433 (2023) |
| Deeds & Mortgages | Apr 2026 Transfer Nov 2020 Sale & Mortgage + 1 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 08-12-222-003 |
| Primary APN | 08-12-222-003 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,283 sqft Living Area |
| 1st Floor Area | 1,283 sqft |
| Year Built | Built 1955 |
|---|---|
| Effective Year Built | Effective 1956 |
| Architectural Style | Bungalow |
| Exterior Material | Brick/Stone |
| Construction Type | Masonry / Concrete Block |
| Roof Material | Asphalt |
| Lot Area | 7,600 sqft (0.175 acres) |
| Garage Type | Detached |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | HVAC |
|---|---|
| Heating System | HVAC |
| Street Address | 305 S WILLIAM ST |
|---|---|
| City | MOUNT PROSPECT |
| State | IL |
| Zip | 60056-3326 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | (MORNINGSIDE)(GARDENS) SUB NE SEC 12-41-11 |
| Legal Range | 11E |
| Legal Township | 41N |
| Legal Section | 12 |
| Legal Subdivision | MORNINGSIDE GARDENS |
| Legal Lot Number | 51 |
| Jurisdiction | COOK IL |
| Township / Civil Division | ELK GROVE |
| Census Block Group | 2 |
| Census Block | 2019 |
| Census Tract | 804901 |
305 S William St is owner-occupied and held in a trust since February 2026.
Source: Cook County records, as of May 27, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 305 S WILLIAM ST, MOUNT PROSPECT, IL 60056-3326 |
| 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.
| Date | Document |
|---|---|
| Apr 6, 2026 | Quit Claim Deed, Transfer NONE LISTED ON DOCUMENT |
| Nov 18, 2020 | Grant Deed, Transfer · Conventional with PMI UNION HM MTG CORP |
| Aug 27, 2020 | Deed in Lieu of Foreclosure, Foreclosure DENVER DIL TITLE |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Nov 18, 2020 · Amount on File |
| Deed Sale | Nov 18, 2020 · Amount on File |
| Prior Sale | Aug 27, 2020 |
| Deed Document Number | 20207056 |
| Last Transfer Date | Feb 24, 2026 |
| Transfer Doc | 0000021010 |
| Record Updated | Oct 29, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | COOK IL |
| Recording Date | Apr 6, 2026 |
| Property Address | 305 S WILLIAM ST, MOUNT PROSPECT, IL 60056-3326 |
| Document Number | 0000021010 |
| Instrument Date | Feb 24, 2026 |
| Instrument | 202621010 |
| Transaction Type | Transfer |
| Record Updated | Aug 27, 2026 |
| Title Company | NONE LISTED ON DOCUMENT |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Revocable Trust |
| Address | 305 S WILLIAM ST, MOUNT PROSPECT, IL 60056-3326 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | COOK IL |
| Recording Date | Nov 18, 2020 |
| Property Address | 305 S WILLIAM ST, MOUNT PROSPECT, IL 60056-3326 |
| Document Number | 2032307056 |
| Instrument Date | Sep 11, 2020 |
| Instrument | 32307056 |
| Transaction Type | Transfer |
| Record Updated | Dec 4, 2020 |
| Title Company | CHICAGO TITLE COMPANY, CHICAGO TITLE CO |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $275.00 |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 305 S WILLIAM ST MOUNT PROSPECT IL 600563326, MOUNT PROSPECT, IL 60056-3326 |
| Document Number | 2032307057 |
|---|---|
| Date | Nov 18, 2020 |
| Instrument | 32307057 |
| Name | UNION HM MTG CORP |
|---|---|
| Address | STRONGSVILLE, OH 44136 |
| Type | Conventional with PMI |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Nov 17, 2050 |
| Rate Type | Fixed Rate |
|---|
| Document Type | Deed in Lieu of Foreclosure |
|---|---|
| Jurisdiction | COOK IL |
| Recording Date | Aug 27, 2020 |
| Property Address | 305 S WILLIAM ST, MOUNT PROSPECT, IL 60056-3326 |
| Document Number | 2024057025 |
| Instrument Date | May 15, 2020 |
| Instrument | 24057025 |
| Transaction Type | Foreclosure |
| Record Updated | Sep 10, 2020 |
| Title Company | DENVER DIL TITLE |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Company |
| Address | 1455 BROAD ST BLOOMFIELD NJ 070033047, BLOOMFIELD, NJ 07003-3047 |
| Investor | Possibly a Property Investor |
Source: Cook County assessment roll, as of May 27, 2026
| 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) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $38,000 Land $8,740 Building $29,260 | $380,000 Land $87,400 Building $292,600 | |
| 2023 | $7,433.00 (+4.41%) | ||
| 2022 | $7,119.00 | $30,000 Land $7,220 Building $22,780 | $300,000 Land $72,200 Building $227,800 |
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 305 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.
The area around 305 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.
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 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 |
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