Boulder County property record for 320 31st St, Boulder, CO 80305
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 1,246 sqft · built 1955 |
| Lot Size | 0.134 acres (5,832 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $200,500 (Sep 1999) |
| Tax Bill | $4,345 (2025) |
| Deeds & Mortgages | Oct 2021 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 1577-05-2-14-006 |
| Primary APN | 1577-05-2-14-006 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,246 sqft Living Area |
| 1st Floor Area | 1,246 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1955 |
|---|---|
| Effective Year Built | Effective 1970 |
| Architectural Style | Ranch |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Lot Area | 5,832 sqft (0.134 acres) |
| Porch | Porch |
| Porch Area | 180 sqft |
| Patio Area | 252 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Account Number | R0001428 |
|---|---|
| Street Address | 320 31ST ST |
| City | BOULDER |
| State | CO |
| Zip | 80305-3405 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 7 BLK 12 HIGHLAND PARK 2 |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 05 |
| Legal Subdivision | HIGHLAND PARK 2 - BO |
| Legal Block | 12 |
| Legal Lot Number | 7 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 2 |
| Census Block | 2006 |
| Census Tract | 12507 |
Source: Boulder County records, as of September 18, 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 Record |
|---|---|
| Mailing Address | 320 31ST ST, BOULDER, CO 80305-3405 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Sep 13, 1999 · Amount on Record |
| Deed Sale | Sep 13, 1999 · Amount on Record |
| Prior Sale | Mar 29, 1996 · Amount on Record |
| Deed Document Number | 19991980214 |
| Last Transfer Date | Mar 22, 2001 |
| Transfer Doc | 0002133151 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BOULDER CO |
| Property Address | 320 31ST ST, BOULDER, CO 80305-3405 |
| Transaction Type | Mortgage |
| Record Updated | Jul 26, 2022 |
| Title Company | FIRST AMERICAN TITLE |
| Name | Verified Name |
|---|---|
| Address | 320 31ST ST, BOULDER, CO 80305-3405 |
| Document Number | 0003923380 |
|---|---|
| Date | Oct 25, 2021 |
| Instrument | 3923380 |
| Name | BLUE FCU |
|---|---|
| Type | Credit Union |
| Address | CHEYENNE, WY 82003 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 179 Months |
| Due | Sep 1, 2036 |
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 | $44,826 (-1.65%) Land $23,542 Building $21,284 | $729,200 (-) Land $416,200 Building $313,000 | |
| 2025 | $4,345.00 (+1.14%) | $45,576 (-14.71%) Land $26,013 Building $19,563 | $729,200 (-8.58%) Land $416,200 Building $313,000 |
| 2023 | $4,296.00 (+16.05%) | $53,439 (+34.05%) Land $30,599 Building $22,840 | $797,600 (+39.05%) Land $456,700 Building $340,900 |
| 2022 | $3,702.00 | $39,865 Land $23,178 Building $16,687 | $573,600 Land $333,500 Building $240,100 |
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 minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 9 in force |
| Nearby Flood Claims | 1 (2013) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Sep 2013 · Severe Storms, Flooding, Landslides, And Mudslides |
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 | Low lower than 67% of the US · lower than 84% of Colorado |
|---|---|
| Wildfire Likelihood | 0.02% 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 | 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 451 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 |
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