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

Cook County property record for 415 S William St, Mount Prospect, IL 60056

Property Summary

Property TypeGeneral Industrial
Details4,987 sqft · built 1967
Lot Size0.806 acres (35,130 sqft)
OwnerTrust Name on Record
Last Sale$389,000 (Jan 2001)
Tax Bill$22,563 (2023)
Deeds & MortgagesApr 2023 Mortgage
Feb 2020 Loan Modification
Flood ZoneZone X (minimal risk)
APN08-12-428-007

Property Details

APN / Parcel Number

Primary APN08-12-428-007
Alternative APN
  • 08-12-428-007-0000

Interior

Stories1 Story
Building Area4,987 sqft Gross Area

Exterior

Year BuiltBuilt 1967
Effective Year BuiltEffective 1967
Lot Area35,130 sqft (0.806 acres)

Location & Zoning

Street Address415 S WILLIAM ST
CityMOUNT PROSPECT
StateIL
Zip60056-3335
Property CategoryIndustrial
Property TypeIndustrial > General Industrial
Legal Description(GLEICHS) (INDUSTRIAL) (PARK) SUB OF WH OF NE & PT OF WH SE SEC 12-41-11
Legal Range11E
Legal Township41N
Legal Section12
Legal SubdivisionGLEICHS INDUSTRIAL PARK
Legal Lot Number6
JurisdictionCOOK IL
Township / Civil DivisionELK GROVE
Census Block Group3
Census Block3001
Census Tract804901

Owner

Source: Cook County records, as of July 13, 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 RecordTrust Name on Record
Mailing Address415 S WILLIAM ST, MOUNT PROSPECT, IL 60056-3335
Owner TypeIndividual
VestingTrust, Personal Trust

Deeds, Mortgages & Sale History

DateDocument
Apr 10, 2023Deed of Trust, Mortgage · Commercial Mortgage
BUSEY BANK
Feb 1, 2020Loan Modification, Mortgage
GLENVIEW ST BK

Assessor's Deed Record

Deed NamesName on Deed
Last SaleJan 5, 2001 · Amount on Record
Deed SaleJan 5, 2001 · Amount on Record
Deed Document Number200112794
Last Transfer DateNov 9, 2007
Transfer Doc0000018037
Record UpdatedOct 29, 2026

April 2023: Deed of Trust, Mortgage

Document TypeDeed of Trust
JurisdictionCOOK IL
Property Address415 S WILLIAM ST, MOUNT PROSPECT, IL 60056-3335
Transaction TypeMortgage
Record UpdatedApr 20, 2023

Transferred To (Grantee/Buyer)

NameVerified Name
Address415 S WILLIAM ST, MT PROSPECT, IL 60056-3335

Mortgage

Document Number0010040041
DateApr 10, 2023
Instrument2310040041
Lender
NameBUSEY BANK
TypeBank
AddressMOUNT PROSPECT, IL 60056
Agreement
TypeCommercial Mortgage
AmountAmount Recorded
Interest
Rate TypeAdjustable Rate

February 2020: Loan Modification, Mortgage

Document TypeLoan Modification
JurisdictionCOOK IL
Property Address415 S WILLIAM ST, MOUNT PROSPECT, IL 60056-3335
Document Number2004947015
Instrument DateFeb 1, 2020
Transaction TypeMortgage
Record UpdatedFeb 28, 2020
Title CompanyNOT AVAILABLE

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipPersonal Trust
Address415 S WILLIAM ST MOUNT PROSPECT IL 600563335, MOUNT PROSPECT, IL 60056-3335

Mortgage

Document Number2004947015
DateFeb 18, 2020
Instrument4947015
Lender
NameGLENVIEW ST BK
TypeBank
Address800 WAUKEGAN RD, GLENVIEW, IL 60025-4381
Agreement
AmountAmount Recorded
Interest
Rate TypeAdjustable Rate
Rate4.75%

Tax Assessment & Valuation

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

Property Jurisdictions

TypeName
StateIllinois
CountyCook County
County SubdivisionElk Grove Township
MunicipalityMount Prospect Village
Secondary School DistrictTownship High School District 214 (09 - 12)
Elementary School DistrictMount Prospect School District 57 (PK - 08)

Tax Bill & Assessment History

YearTax BillAssessed ValueAssessed Market Value
2025$124,675 (+53.92%) Land $124,273 Building $402$498,700 (+53.92%) Land $497,092 Building $1,608
2023$22,563.00 (+4%)
2022$21,695.00$81,000 Land $74,212 Building $6,788$324,000 Land $296,848 Building $27,152

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

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

FEMA Flood ZoneZone X
minimal risk
Flood Insurance RequirementNot required
lenders may require it
Community Rating SystemClass 6 (20% premium discount)
Nearby Flood Policies2 in force
Nearby Flood Claims6 (1987–2007)
Claims Outside the SFHA2 of 6
Most Recent ClaimAug 2007 · Severe Storms And Flooding
Claims by Event
  • Severe Storms & Flooding, Aug 1987 · 3 claims

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

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

Wildfire RiskLow
lower than 95% of the US · lower than 70% of Illinois
Wildfire LikelihoodUnder 0.01% annual chance
ExposureDirect
burnable vegetation

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 SystemMOUNT PROSPECT
serves 41,000 people · EPA ID IL0311980
Water SourcePurchased surface water from NORTHWEST SUBURBAN MUNICIPAL JAWA
Last State InspectionAug 2025
Lead2 ppb (2026–2028)
action level 15 ppb

Violations Reported to EPA

Water QualityNone
last 10 years
Treatment and ProcedureNone
last 10 years
Monitoring and Reporting11
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 488 locations within half a mile, as of December 31, 2025

ProviderMax 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 · Fiber, DSL in parts of the area		100 / 20

May also be available: Zentro.

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