Boulder County property record for 1900 Mariposa Ave, Boulder, CO 80302
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 1.75 ba · 2,128 sqft · built 1949 |
| Lot Size | 0.166 acres (7,217 sqft) |
| Owner | Trust Name on File |
| Tax Bill | $8,116 (2025) |
| Flood Zone | Zone X (moderate risk) |
| APN | 1577-06-1-18-004 |
| Primary APN | 1577-06-1-18-004 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 1.75 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Stories | 2 Stories |
| Building Area | 2,128 sqft Living Area |
| 1st Floor Area | 1,576 sqft |
| Upper Floors Area | 552 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1949 |
|---|---|
| Effective Year Built | Effective 1949 |
| Architectural Style | Multi-Level |
| Exterior Material | Combination |
| Construction Type | Masonry / Concrete Block |
| Roof Material | Asphalt |
| Lot Area | 7,217 sqft (0.166 acres) |
| Garage Type | Detached |
| Garage Area | 880 sqft |
| Parking Spaces | 4 Parking Spaces |
| Deck Area | 288 sqft |
| Patio Area | 408 sqft |
| Heating System | Hot Water |
|---|
| Account Number | R0008365 |
|---|---|
| Street Address | 1900 MARIPOSA AVE |
| City | BOULDER |
| State | CO |
| Zip | 80302-7933 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 4 BLK 13 FLORAL PARK |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 06 |
| Legal Subdivision | FLORAL PARK & WEIHOFEN RESUB - BO |
| Legal Block | 13 |
| Legal Lot Number | 4 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 1 |
| Census Block | 1017 |
| Census Tract | 12505 |
1900 Mariposa Ave is owner-occupied and held in a trust since August 1995.
Source: Boulder County records, as of September 18, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 1900 MARIPOSA AVE, BOULDER, CO 80302-7933 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust, Living Trust |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | Name on Deed |
|---|---|
| Last Transfer Date | Aug 25, 1995 |
| Transfer Doc | 0001544305 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 1900 Mariposa Ave was $8,116.
Source: Boulder County assessment roll, as of September 18, 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 | $94,649 (+3.59%) Land $59,656 Building $34,993 | $1,461,900 (-) Land $947,300 Building $514,600 | |
| 2025 | $8,116.00 | $91,369 Land $59,206 Building $32,163 | $1,461,900 Land $947,300 Building $514,600 |
| 2023 | $6,969.00 (+5.88%) | $91,086 (+17.03%) Land $59,402 Building $31,684 | $1,359,500 (+21.39%) Land $886,600 Building $472,900 |
| 2022 | $6,582.00 | $77,833 Land $48,914 Building $28,919 | $1,119,900 Land $703,800 Building $416,100 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 1900 Mariposa Ave in Zone X, an area of moderate flood risk, within 100 ft of a high-risk flood zone.
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 moderate risk |
|---|---|
| 500-Year Floodplain | Yes 0.2% annual chance |
| Nearest Special Flood Hazard Area | Zone AE, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on File median of 15 policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 15 in force |
| Nearby Flood Claims | 12 (1994–2013) |
| Claims Outside the SFHA | 4 of 12 |
| Most Recent Claim | Sep 2013 · Severe Storms, 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.
Wildfire risk around 1900 Mariposa Ave is moderate, ranking above 67% of the US, with a 0.2% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 67% of the US · above 59% of Colorado |
|---|---|
| Wildfire Likelihood | 0.2% annual chance |
| Exposure | Indirect 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 | 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 481 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Ayva Networks Fixed Wireless | 2,500 / 2,500 |
| CenturyLink Fiber · DSL in parts of the area | 2,000 / 1,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| LiveWireNet Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Magnolia Road Internet Cooperative.
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