Boulder County property record for 933 Union Ave, Boulder, CO 80304
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1.5 ba · 2,360 sqft · built 1962 |
| Lot Size | 0.332 acres (14,475 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $94,000 (Oct 1987) |
| Tax Bill | $8,193 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 1461-13-1-21-001 |
| Primary APN | 1461-13-1-21-001 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 2,360 sqft Living Area |
| Gross Area | 3,141 sqft |
| 1st Floor Area | 2,360 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1962 |
|---|---|
| Effective Year Built | Effective 1985 |
| Architectural Style | Ranch |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Roof Material | Asphalt |
| Lot Area | 14,475 sqft (0.332 acres) |
| Garage Type | Attached |
| Garage Area | 781 sqft |
| Parking Spaces | 3 Parking Spaces |
| Patio Area | 160 sqft |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0033668 |
|---|---|
| Street Address | 933 UNION AVE |
| City | BOULDER |
| State | CO |
| Zip | 80304-0710 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 1 NORTHVIEW |
| Legal Range | 71 |
| Legal Township | 1N |
| Legal Section | 13 |
| Legal Subdivision | NORTHVIEW SUB - BO |
| Legal Block | 1 |
| Legal Lot Number | 1 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 1 |
| Census Block | 1017 |
| Census Tract | 12104 |
Source: Boulder County assessment roll, as of June 15, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 933 UNION AVE, BOULDER, CO 80304-0710 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Oct 28, 1987 · Amount on Record |
| Deed Sale | Oct 28, 1987 · Amount on Record |
| Prior Sale | Oct 26, 1987 |
| Deed Document Number | 1987885659 |
| Record Updated | Sep 20, 2026 |
Source: Boulder County assessment roll, as of June 15, 2026
| Type | Name |
|---|---|
| State | Colorado |
| County | Boulder County |
| Municipality | Boulder City |
| Unified School District | Boulder Valley School District RE-2 (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $100,293 (+8.8%) Land $90,264 Building $10,029 | $1,474,900 (-) Land $1,327,410 Building $147,490 | |
| 2025 | $8,193.00 (+1.8%) | $92,181 (-11.01%) Land $82,963 Building $9,218 | $1,474,900 (-4.61%) Land $1,327,410 Building $147,490 |
| 2023 | $8,048.00 (+20.42%) | $103,589 (+31.25%) Land $93,230 Building $10,359 | $1,546,100 (+36.15%) Land $1,391,490 Building $154,610 |
| 2022 | $6,683.00 | $78,924 Land $71,032 Building $7,892 | $1,135,600 Land $1,022,040 Building $113,560 |
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 October 14, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 58 individual policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 63 units insured incl. 5 condo units |
| Nearby Flood Claims | 14 (2013–2015) |
| Claims Outside the SFHA | 6 of 14 |
| Most Recent Claim | May 2015 · Severe Storms, Tornadoes, Flooding, Landslides, And Mudslides |
| 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 64% of the US · above 54% of Colorado |
|---|---|
| Wildfire Likelihood | 0.2% annual chance |
| Exposure | Indirect within ember reach |
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | CITY OF BOULDER serves 166,080 people · EPA ID CO0107152 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Sep 2024 |
| Lead | 2 ppb (2023–2025) action level 15 ppb |
| Water Quality | Haloacetic acids resolved · Jul 2017 |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 1 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 460 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Ayva Fixed Wireless | 2,500 / 2,500 |
| Xfinity Cable | 2,000 / 250 |
| Live Wire Networks Fixed Wireless | 250 / 100 |
| T-Mobile USA Fixed Wireless | 100 / 20 |
May also be available: AT&T, Lumen Technologies.
5G (outdoors only) and 4G LTE
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