Boulder County property record for 1303 Mariposa Ave, Boulder, CO 80302
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 2,780 sqft · built 1953 |
| Lot Size | 0.287 acres (12,506 sqft) |
| Owner | Company Name on Record |
| Last Sale | $200,000 (May 1989) |
| Tax Bill | $10,071 (2025) |
| Deeds & Mortgages | Oct 2017 Transfer |
| Flood Zone | Zone X (moderate risk) |
| APN | 1577-06-2-28-006 |
| Primary APN | 1577-06-2-28-006 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 2 Half Baths |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 2,780 sqft Living Area |
| Gross Area | 3,164 sqft |
| 1st Floor Area | 1,592 sqft |
| Basement Area | 1,188 sqft |
| Finished Basement | 1,188 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1953 |
|---|---|
| Effective Year Built | Effective 1967 |
| Architectural Style | Ranch |
| Exterior Material | Brick Veneer |
| Construction Type | Masonry / Concrete Block |
| Lot Area | 12,506 sqft (0.287 acres) |
| Garage Type | Attached |
| Garage Area | 384 sqft |
| Parking Spaces | 1 Parking Space |
| Porch | Porch |
|---|---|
| Porch Area | 164 sqft |
| Deck Area | 120 sqft |
| Patio Area | 392 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Account Number | R0004033 |
|---|---|
| Street Address | 1303 MARIPOSA AVE |
| City | BOULDER |
| State | CO |
| Zip | 80302-7841 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 6 BLK 1 BELLEVUE PARK REPLAT |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 06 |
| Legal Subdivision | BELLEVUE PARK REPLAT - BO |
| Legal Block | 1 |
| Legal Lot Number | 6 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 2 |
| Census Block | 2008 |
| Census Tract | 12505 |
Source: Boulder County records, 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 | Company Name on Record |
|---|---|
| Mailing Address | 1303 MARIPOSA AVE, BOULDER, CO 80302-7841 |
| Owner Type | Company |
| Vesting | Trust, Revocable Trust |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | May 15, 1989 · Amount on Record |
| Deed Sale | May 15, 1989 · Amount on Record |
| Prior Sale | Sep 29, 1966 |
| Deed Document Number | 1989982489 |
| Last Transfer Date | Oct 2, 2017 |
| Transfer Doc | 0003620207 |
| Record Updated | Sep 20, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Oct 17, 2017 |
| Property Address | 1303 MARIPOSA AVE, BOULDER, CO 80302-7841 |
| Document Number | 0003620207 |
| Instrument Date | Oct 2, 2017 |
| Instrument | 3620207 |
| Transaction Type | Transfer |
| Record Updated | Oct 26, 2017 |
| Title Company | ATTORNEY ONLY |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Revocable Trust |
| Address | 1303 MARIPOSA AVE BOULDER CO 803027841, BOULDER, CO 80302-7841 |
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 | $121,727 (+8.8%) Land $109,554 Building $12,173 | $1,790,100 (-) Land $1,611,090 Building $179,010 | |
| 2025 | $10,071.00 (+7.16%) | $111,881 (-6.16%) Land $100,693 Building $11,188 | $1,790,100 (+0.6%) Land $1,611,090 Building $179,010 |
| 2023 | $9,398.00 (+10.19%) | $119,220 (+20.67%) Land $107,298 Building $11,922 | $1,779,400 (+25.17%) Land $1,601,460 Building $177,940 |
| 2022 | $8,529.00 | $98,801 Land $88,921 Building $9,880 | $1,421,600 Land $1,279,440 Building $142,160 |
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.
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 Record median of 34 policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 34 in force |
| Nearby Flood Claims | 17 (1980–2015) |
| Claims Outside the SFHA | 7 of 17 |
| 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 | High above 74% of the US · above 72% of Colorado |
|---|---|
| Wildfire Likelihood | 0.4% annual chance |
| Exposure | Direct burnable vegetation |
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 480 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 | 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.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures