Dubuque County property record for 421 Locust St, Dubuque, IA 52001
| Property Type | Quadplex |
|---|---|
| Details | 7 bd · 7 ba · 3,222 sqft · built 1890 |
| Lot Size | 0.119 acres (5,210 sqft) |
| Owner | Company Name on Record |
| Tax Bill | $2,152 (2024) |
| Flood Zone | Zone X (minimal risk) |
| APN | 10-25-214-014 |
| Primary APN | 10-25-214-014 |
|---|
| Bedrooms | 7 Beds |
|---|---|
| Full Baths | 7 Baths |
| Half Baths | 3 Half Baths |
| Total Rooms | 14 Rooms |
| Stories | 2 Stories |
| Building Area | 3,222 sqft Total Area |
| 1st Floor Area | 540 sqft |
| Basement Area | 1,233 sqft |
| Interior Walls | Plaster |
| Year Built | Built 1890 |
|---|---|
| Architectural Style | Other |
| Exterior Material | Brick |
| Construction Type | Brick |
| Foundation Type | Stone |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 5,210 sqft (0.119 acres) |
| Cooling System | None |
|---|---|
| Heating System | Forced Air |
| Heating Fuel | Gas |
| Water Source | Commercial |
| Street Address | 421 LOCUST ST |
|---|---|
| City | DUBUQUE |
| State | IA |
| Zip | 52001-6982 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Quadplex |
| Local Zoning Code | CI |
| Legal Description | S 25'6" OF CITY LOT 107 & N 20' OF CITY LOT 108 |
| Legal Lot Number | 107,108 |
| Jurisdiction | DUBUQUE IA |
| Township / Civil Division | DUBUQUE |
| Census Block Group | 2 |
| Census Block | 2009 |
| Census Tract | 100 |
Source: NPS National Register of Historic Places, as of August 1, 2026
| Historic District | Within the Cathedral Historic District listed 1985 · 97 contributing resources · NRIS 85002501 |
|---|
Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.
Source: Dubuque County records, as of October 6, 2025
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 290 MAIN ST, DUBUQUE, IA 52001-6942 |
| Owner Type | Company |
| Deed Names | Name on Deed |
|---|---|
| Record Updated | Jun 8, 2026 |
Source: Dubuque County assessment roll, as of May 1, 2025
| Type | Name |
|---|---|
| State | Iowa |
| County | Dubuque County |
| Municipality | Dubuque City |
| Unified School District | Dubuque Community School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $161,600 (+7.95%) Land $22,700 Building $138,900 | $161,600 (+7.95%) Land $22,700 Building $138,900 | |
| 2024 | $2,152.00 (+10.25%) | ||
| 2023 | $149,700 (+32.21%) Land $18,800 Building $130,900 | $149,700 (+32.21%) Land $18,800 Building $130,900 | |
| 2022 | $1,952.00 | $113,230 Land $18,760 Building $94,470 | |
| 2021 | $113,230 Land $18,760 Building $94,470 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
Source: FEMA National Flood Hazard Layer, effective August 9, 2021
| 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 99.1% of the US · lower than 91% of Iowa |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond 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 | DUBUQUE WATER WORKS serves 59,667 people · EPA ID IA3126052 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Jan 2025 |
| Lead | 5 ppb (2021–2023) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None 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 497 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Mediacom Xtream Cable · Fiber in parts of the area | 1,000 / 50 |
| CenturyLink DSL · Fiber in parts of the area | 140 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Comelec Internet Services, ImOn Communications, Nextlink, Verizon.
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