Lake County property record for 421 Thompson Blvd, Buffalo Grove, IL 60089
| Property Type | Single Family Home |
|---|---|
| Details | 3.5 ba · 2,648 sqft · built 1980 |
| Lot Size | 0.211 acres (9,191 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $533,000 (Jun 2026) |
| Tax Bill | $16,737 (2025) |
| Deeds & Mortgages | Jun 2021 Mortgage Jun 2026 Sale & Mortgage + 2 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 15-29-210-002 |
| Primary APN | 15-29-210-002 |
|---|
| Full Baths | 3.5 Baths |
|---|---|
| Half Baths | 1 Half Bath |
| Stories | 2 Stories |
| Building Area | 2,648 sqft Living Area |
| Gross Area | 3,288 sqft |
| 1st Floor Area | 1,248 sqft |
| Upper Floors Area | 800 sqft |
| Basement Area | 800 sqft |
| Finished Basement | 600 sqft |
| Unfinished Basement | 200 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1980 |
|---|---|
| Effective Year Built | Effective 1980 |
| Lot Area | 9,191 sqft (0.211 acres) |
| Garage Type | Attached |
| Garage Area | 440 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | Central |
|---|
| Street Address | 421 THOMPSON BLVD |
|---|---|
| City | BUFFALO GROVE |
| State | IL |
| Zip | 60089-1032 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | GREEN KNOLLS UNIT NO.3; LOT 248 |
| Legal Subdivision | GREEN KNOLLS UNIT NO.3 |
| Legal Lot Number | 248 |
| Legal Unit | 3 |
| Jurisdiction | LAKE IL |
| Township / Civil Division | VERNON |
| Census Block Group | 4 |
| Census Block | 4004 |
| Census Tract | 864518 |
421 Thompson Blvd is owned and occupied by two individuals who bought it in June 2026.
Source: Lake County records, as of June 23, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 1340 STREAMWOOD LN, VERNON HILLS, IL 60061-1200 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Tenants by the Entirety |
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 |
|---|---|
| Jun 24, 2021 | Deed of Trust, Mortgage · FHA Mortgage GUARANTEED RATE INC |
| Jun 5, 2026 | Warranty Deed, Transfer · Conventional Mortgage NONE LISTED ON DOCUMENT |
| Feb 26, 2020 | Deed of Trust, Mortgage · Conventional with PMI GUARANTEED RATE |
| Jul 10, 2017 | Warranty Deed, Transfer · Conventional Mortgage GUARANTEED RATE |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 5, 2026 · Amount on File |
| Deed Sale | Jun 5, 2026 · Amount on File |
| Prior Sale | Jul 10, 2017 · Amount on File |
| Deed Document Number | 20268173731 |
| Prior Transfer Date | Jul 27, 1998 |
| Prior Transfer Doc | 0004177395 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | LAKE IL |
| Property Address | 421 THOMPSON BLVD, BUFFALO GROVE, IL 60089-1032 |
| Transaction Type | Mortgage |
| Record Updated | Jun 18, 2026 |
| Name | Verified Name |
|---|
| Document Number | 0007802345 |
|---|---|
| Date | Jun 24, 2021 |
| Instrument | 7802345 |
| Name | GUARANTEED RATE INC |
|---|---|
| Type | Mortgage Company |
| Address | CHICAGO, IL 60613 |
| Type | FHA Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 180 Months |
| Due | Jun 1, 2036 |
| Rate Type | Fixed Rate |
|---|---|
| Rate | 2.62% |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | LAKE IL |
| Recording Date | Jun 5, 2026 |
| Property Address | 421 THOMPSON BLVD, BUFFALO GROVE, IL 60089-1032 |
| Document Number | 0008173731 |
| Instrument Date | May 28, 2026 |
| Instrument | 20268173731 |
| Transaction Type | Transfer |
| Record Updated | Jun 17, 2026 |
| Title Company | NONE LISTED ON DOCUMENT |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $80,749.50 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Tenants by the Entirety |
| Address | 1340 STREAMWOOD LN, VERNON HILLS, IL 60061-1200 |
| Document Number | 0008173732, |
|---|---|
| Date | Jun 5, 2026 |
| Instrument | 20268173732 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 180 Months |
| Due | Jul 1, 2041 |
| Rate Type | Fixed Rate |
|---|---|
| Rate | 6.25% |
| Initial Type | Fixed Rate |
| Max Rate | -1% |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | LAKE IL |
| Property Address | 421 THOMPSON BLVD, BUFFALO GROVE, IL 60089-1032 |
| Document Number | 0007638004 |
| Instrument Date | Feb 26, 2020 |
| Transaction Type | Mortgage |
| Record Updated | Mar 19, 2020 |
| Title Company | RAVENSWOOD TITLE |
| Name | Verified Name |
|---|---|
| Relationship | Tenants by the Entirety |
| Address | 421 THOMPSON BLVD BUFFALO GROVE IL 600891032, BUFFALO GROVE, IL 60089-1032 |
| Document Number | 0007638004 |
|---|---|
| Date | Mar 2, 2020 |
| Instrument | 7638004 |
| Name | GUARANTEED RATE |
|---|---|
| Address | CHICAGO, IL 60613 |
| Type | Conventional with PMI |
|---|---|
| Amount | Amount on Record |
| Term | 240 Months |
| Due | Mar 1, 2040 |
| Rate Type | Fixed Rate |
|---|---|
| Rate | 3.5% |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | LAKE IL |
| Recording Date | Jul 10, 2017 |
| Property Address | 421 THOMPSON BLVD, BUFFALO GROVE, IL 60089-1032 |
| Document Number | 0007409466 |
| Instrument Date | Jun 19, 2017 |
| Instrument | 7409466 |
| Transaction Type | Transfer |
| Record Updated | Jul 25, 2017 |
| Title Company | CHICAGO TITLE COMPANY, CHICAGO TITLE CO |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $618.00 |
| Amount Accuracy | Confirmed |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Tenants by the Entirety |
| Address | 440 EAGLE GLEN RD LAS VEGAS NV 891485292, LAS VEGAS, NV 89148-5292 |
| Document Number | 7409467 |
|---|---|
| Date | Jul 10, 2017 |
| Instrument | 7409467 |
| Name | GUARANTEED RATE |
|---|---|
| Address | CHICAGO, IL 60613 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Jul 9, 2047 |
| Rate Type | Fixed Rate |
|---|---|
| Rate | 3.99% |
The 2025 property tax bill for 421 Thompson Blvd was $16,737 with a homeowner's exemption, up 1% from the year before.
Source: Lake County assessment roll, as of April 29, 2026
| Type | Name |
|---|---|
| State | Illinois |
| Municipality | Buffalo Grove Village |
| County | Lake County |
| County Subdivision | Vernon Township |
| Elementary School District | Kildeer Countryside Community Consolidated School District 96 (PK - 08) |
| Secondary School District | Adlai E. Stevenson High School District 125 (09 - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $16,737.00 (+1%) | $185,082 Land $37,073 Building $148,009 | $555,301 Land $111,230 Building $444,071 |
| 2024 | $16,572.00 (+17.99%) | ||
| 2023 | $14,045.00 (+3.93%) | $156,790 (+11.43%) Land $31,406 Building $125,384 | $470,417 (+11.43%) Land $94,227 Building $376,190 |
| 2022 | $13,514.00 | $140,704 Land $28,184 Building $112,520 | $422,154 Land $84,560 Building $337,594 |
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 421 Thompson Blvd in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective February 20, 2024
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
The area around 421 Thompson Blvd 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 | BUFFALO GROVE serves 43,212 people · EPA ID IL0314180 |
|---|---|
| Water Source | Purchased surface water from several systems |
| Last State Inspection | Apr 2025 |
| Lead | 1 ppb (2024–2026) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 3 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.
Source: FCC Broadband Data Collection, based on 395 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless · DSL | 100 / 20 |
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