Boulder County property record for 1729 Mariposa Ave, Boulder, CO 80302
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 1,281 sqft · built 1942 |
| Lot Size | 0.182 acres (7,930 sqft) |
| Owner | Individual Name on File |
| Last Sale | $34,500 (Jun 1973) |
| Tax Bill | $7,422 (2025) |
| Flood Zone | Zone X (moderate risk) |
| APN | 1577-06-2-07-007 |
| Primary APN | 1577-06-2-07-007 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,281 sqft Living Area |
| 1st Floor Area | 1,281 sqft |
| Interior Walls | Plaster |
| Year Built | Built 1942 |
|---|---|
| Effective Year Built | Effective 1942 |
| Architectural Style | Ranch |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Lot Area | 7,930 sqft (0.182 acres) |
| Garage Type | Detached |
| Garage Area | 240 sqft |
| Parking Spaces | 1 Parking Space |
| Patio Area | 253 sqft |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0006195 |
|---|---|
| Street Address | 1729 MARIPOSA AVE |
| City | BOULDER |
| State | CO |
| Zip | 80302-7928 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | E 29 FT LOT 10 & W 28 FT LOT 11 BLK 10 FLORAL PARK |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 06 |
| Legal Subdivision | FLORAL PARK & WEIHOFEN RESUB - BO |
| Legal Block | 10 |
| Legal Lot Number | 10 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 1 |
| Census Block | 1010 |
| Census Tract | 12505 |
1729 Mariposa Ave is owned by an individual who acquired it in April 2018.
Source: Boulder County records, as of September 18, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 3007 SEVOR LN, ALEXANDRIA, VA 22309-2220 |
| Owner Type | Individual |
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 Sale | Jun 8, 1973 · Amount on File |
| Deed Sale | Jun 8, 1973 · Amount on File |
| Deed Document Number | 197369034 |
| Last Transfer Date | Apr 23, 2018 |
| Transfer Doc | 0003653589 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 1729 Mariposa Ave was $7,422.
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 | $79,009 (+2.62%) Land $62,764 Building $16,245 | $1,231,900 (-) Land $993,000 Building $238,900 | |
| 2025 | $7,422.00 | $76,994 Land $62,063 Building $14,931 | $1,231,900 Land $993,000 Building $238,900 |
| 2023 | $5,742.00 (+5.4%) | $76,876 (+17.15%) Land $62,270 Building $14,606 | $1,147,400 (+21.52%) Land $929,400 Building $218,000 |
| 2022 | $5,448.00 | $65,622 Land $51,270 Building $14,352 | $944,200 Land $737,700 Building $206,500 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 1729 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 1729 Mariposa Ave is moderate, ranking above 67% of the US, with a 0.3% 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 60% of Colorado |
|---|---|
| Wildfire Likelihood | 0.3% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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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