Boulder County property record for 275 31st St, Boulder, CO 80305
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 988 sqft · built 1955 |
| Lot Size | 0.172 acres (7,511 sqft) |
| Owner | Individual Name on File |
| Last Sale | $64,000 (Sep 1981) |
| Tax Bill | $5,126 (2025) |
| Deeds & Mortgages | Jun 2026 Transfer Nov 2022 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 1577-05-2-10-028 |
| Primary APN | 1577-05-2-10-028 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 988 sqft Living Area |
| Gross Area | 1,248 sqft |
| 1st Floor Area | 988 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1955 |
|---|---|
| Effective Year Built | Effective 1993 |
| Architectural Style | Ranch |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Roof Material | Asphalt |
| Lot Area | 7,511 sqft (0.172 acres) |
| Garage Type | Attached |
| Garage Area | 260 sqft |
| Parking Spaces | 1 Parking Space |
| Porch | Porch |
| Porch Area | 35 sqft |
| Patio Area | 250 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Account Number | R0001527 |
|---|---|
| Street Address | 275 31ST ST |
| City | BOULDER |
| State | CO |
| Zip | 80305-3403 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 28 BLK 10 HIGHLAND PARK 1 |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 05 |
| Legal Subdivision | HIGHLAND PARK 1 - BO |
| Legal Block | 10 |
| Legal Lot Number | 28 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 2 |
| Census Block | 2005 |
| Census Tract | 12507 |
275 31st St is owned by an individual who acquired it in August 2022.
Source: Boulder County records, as of September 18, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 1015 MAIN ST, HOUSATONIC, MA 01236-9724 |
| 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.
| Date | Document |
|---|---|
| Jun 4, 2026 | Transfer on Death Deed, Transfer NONE LISTED ON DOCUMENT |
| Nov 30, 2022 | Intrafamily Transfer, Transfer |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Sep 15, 1981 · Amount on File |
| Deed Sale | Sep 15, 1981 · Amount on File |
| Deed Document Number | 1981464115 |
| Last Transfer Date | Aug 11, 2022 |
| Transfer Doc | 0003990485 |
| Record Updated | Oct 29, 2026 |
| Document Type | Transfer on Death Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Jun 4, 2026 |
| Property Address | 275 31ST ST, BOULDER, CO 80305-3403 |
| Document Number | 0004134895 |
| Instrument Date | May 12, 2026 |
| Instrument | 20264134895 |
| Transaction Type | Transfer |
| Record Updated | Aug 29, 2026 |
| Title Company | NONE LISTED ON DOCUMENT |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Full Amount Stated |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 1015 MAIN ST, HOUSATONIC, MA 01236-9724 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Nov 30, 2022 |
| Property Address | 275 31ST ST, BOULDER, CO 80305-3403 |
| Document Number | 0003990485 |
| Instrument Date | Aug 11, 2022 |
| Instrument | 3990485 |
| Transaction Type | Transfer |
| Record Updated | Dec 6, 2022 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|---|
| Address | 4903 EARLSTON DR, 4903, BETHESDA, MD 20816-1733 |
| Name | Verified Name |
|---|---|
| Address | 501 PACK CREEK RD, MOAB, UT 84532-3744 |
The 2025 property tax bill for 275 31st St was $5,126.
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 | $52,816 (-0.19%) Land $27,364 Building $25,452 | $846,700 (-) Land $472,400 Building $374,300 | |
| 2025 | $5,126.00 | $52,919 Land $29,525 Building $23,394 | $846,700 Land $472,400 Building $374,300 |
| 2023 | $5,006.00 (+12.12%) | $60,789 (+28.57%) Land $34,726 Building $26,063 | $907,300 (+33.37%) Land $518,300 Building $389,000 |
| 2022 | $4,465.00 | $47,281 Land $26,306 Building $20,975 | $680,300 Land $378,500 Building $301,800 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 275 31st St in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 2013.
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.
Wildfire risk around 275 31st St is low, with a 0.02% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · lower than 91% 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 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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