Boulder County property record for 155 31st St, Boulder, CO 80305
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 1,026 sqft · built 1955 |
| Lot Size | 0.182 acres (7,946 sqft) |
| Owner | 2 Individual Names on Record |
| Tax Bill | $3,697 (2025) |
| Deeds & Mortgages | Nov 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 1577-05-3-18-021 |
| Primary APN | 1577-05-3-18-021 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,026 sqft Living Area |
| Gross Area | 1,296 sqft |
| 1st Floor Area | 1,026 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1955 |
|---|---|
| Effective Year Built | Effective 1955 |
| Architectural Style | Ranch |
| Exterior Material | Brick Veneer |
| Construction Type | Masonry / Concrete Block |
| Lot Area | 7,946 sqft (0.182 acres) |
| Garage Type | Attached |
| Garage Area | 270 sqft |
| Parking Spaces | 1 Parking Space |
| Patio Area | 120 sqft |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0006653 |
|---|---|
| Street Address | 155 31ST ST |
| City | BOULDER |
| State | CO |
| Zip | 80305 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 26 BLK 15 HIGHLAND PARK 3 |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 05 |
| Legal Subdivision | HIGHLAND PARK 3 - BO |
| Legal Block | 15 |
| Legal Lot Number | 26 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 2 |
| Census Block | 2011 |
| 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 | 155 31ST ST, BOULDER, CO 80305 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Oct 23, 2020 |
| Transfer Doc | 0003831387 |
| Record Updated | Oct 29, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Nov 9, 2020 |
| Property Address | 155 31ST ST, BOULDER, CO 80305 |
| Document Number | 0003831387 |
| Instrument Date | Oct 23, 2020 |
| Instrument | 3831387 |
| Transaction Type | Transfer |
| Record Updated | Mar 31, 2022 |
| Title Company | FIRST AMERICAN |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants |
| Address | 155 31ST ST, BOULDER, CO 80305 |
| Document Number | 0003831388 |
|---|---|
| Date | Nov 9, 2020 |
| Instrument | 3831388 |
| Name | CHERRY CREEK MORTGAGE CO INC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Nov 1, 2050 |
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 | $44,234 (-1.77%) Land $28,281 Building $15,953 | $720,500 (-) Land $485,900 Building $234,600 | |
| 2025 | $3,697.00 (+3.53%) | $45,032 (-12.97%) Land $30,369 Building $14,663 | $720,500 (-6.71%) Land $485,900 Building $234,600 |
| 2023 | $3,571.00 (-4.42%) | $51,744 (+28.59%) Land $35,718 Building $16,026 | $772,300 (+33.39%) Land $533,100 Building $239,200 |
| 2022 | $3,736.00 | $40,240 Land $27,056 Building $13,184 | $579,000 Land $389,300 Building $189,700 |
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 |
|---|---|
| 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 | Moderate above 59% of the US · above 44% of Colorado |
|---|---|
| Wildfire Likelihood | 0.2% 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 294 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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