Boulder County property record for 315 Auburn St, Boulder, CO 80305
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 2,464 sqft · built 1957 |
| Lot Size | 0.166 acres (7,250 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $725,000 (Jul 2020) |
| Tax Bill | $5,983 (2025) |
| Deeds & Mortgages | Jul 2020 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 1577-05-3-24-009 |
| Primary APN | 1577-05-3-24-009 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 2,464 sqft Living Area |
| 1st Floor Area | 1,232 sqft |
| Basement Area | 1,232 sqft |
| Finished Basement | 1,232 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1957 |
|---|---|
| Effective Year Built | Effective 1985 |
| Architectural Style | Ranch |
| Exterior Material | Brick Veneer |
| Construction Type | Masonry / Concrete Block |
| Roof Material | Asphalt |
| Lot Area | 7,250 sqft (0.166 acres) |
| Heating System | Hot Water |
|---|
| Account Number | R0012585 |
|---|---|
| Street Address | 315 AUBURN ST |
| City | BOULDER |
| State | CO |
| Zip | 80305-5301 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 9 BLK 22 HIGHLAND PARK 5 |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 05 |
| Legal Subdivision | HIGHLAND PARK 5 - BO |
| Legal Block | 22 |
| Legal Lot Number | 9 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 2 |
| Census Block | 2034 |
| Census Tract | 12505 |
315 Auburn St is owned and occupied by two individuals who bought it in July 2020.
Source: Boulder County records, as of September 18, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 315 AUBURN ST, BOULDER, CO 80305-5301 |
| Occupancy | Owner Occupied |
| 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 | 2 Names on Deed |
|---|---|
| Last Sale | Jul 10, 2020 · Amount on File |
| Deed Sale | Jul 10, 2020 · Amount on File |
| Prior Sale | Jun 25, 2007 · Amount on File |
| Deed Document Number | 20203797112 |
| Prior Transfer Date | Mar 20, 2009 |
| Prior Transfer Doc | 0002989660 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Jul 10, 2020 |
| Property Address | 315 AUBURN ST, BOULDER, CO 80305-5301 |
| Document Number | 0003797112 |
| Instrument Date | Jul 8, 2020 |
| Instrument | 3797112 |
| Transaction Type | Transfer |
| Record Updated | Aug 21, 2020 |
| Title Company | LAND TITLE GUARANTEE |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $73.00 |
| Amount Accuracy | Confirmed |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
| Address | 315 AUBURN ST BOULDER CO 803055301, BOULDER, CO 80305-5301 |
| Document Number | 3797113 |
|---|---|
| Date | Jul 10, 2020 |
| Instrument | 3797113 |
| Name | ELEVATIONS CU |
|---|---|
| Address | BOULDER, CO 80301 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Jul 9, 2050 |
The 2025 property tax bill for 315 Auburn St was $5,983.
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 | $63,512 (+1.21%) Land $47,362 Building $16,150 | $1,004,000 (-) Land $766,500 Building $237,500 | |
| 2025 | $5,983.00 | $62,750 Land $47,906 Building $14,844 | $1,004,000 Land $766,500 Building $237,500 |
| 2023 | $5,243.00 (+15.08%) | $64,407 (+31.26%) Land $55,704 Building $8,703 | $961,300 (+36.16%) Land $831,400 Building $129,900 |
| 2022 | $4,556.00 | $49,067 Land $41,130 Building $7,937 | $706,000 Land $591,800 Building $114,200 |
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.
FEMA maps place 315 Auburn St in Zone X, an area of minimal flood risk, though there have been 17 flood claims nearby since 1980.
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 |
| Flood Insurance Cost | Premium on File 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.
Wildfire risk around 315 Auburn St is low, with a 0.05% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 63% of the US · lower than 80% of Colorado |
|---|---|
| Wildfire Likelihood | 0.05% 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 515 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: AT&T.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures