Boulder County property record for 3397 Sentinel Dr, Boulder, CO 80301
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 1,892 sqft · built 1991 |
| Lot Size | 0.104 acres (4,522 sqft) |
| Owner | Individual Name on File |
| Last Sale | $584,900 (Dec 2015) |
| Tax Bill | $5,459 (2025) |
| Deeds & Mortgages | Sep 2018 Mortgage Feb 2018 Line of Credit |
| Flood Zone | Zone X (minimal risk) |
| APN | 1463-21-3-09-004 |
| Primary APN | 1463-21-3-09-004 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 7 Rooms |
| Stories | 2 Stories |
| Building Area | 1,892 sqft Living Area |
| Gross Area | 2,690 sqft |
| 1st Floor Area | 816 sqft |
| Upper Floors Area | 678 sqft |
| Basement Area | 796 sqft |
| Finished Basement | 398 sqft |
| Unfinished Basement | 398 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1991 |
|---|---|
| Effective Year Built | Effective 1991 |
| Architectural Style | A-Frame |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Roof Material | Asphalt |
| Lot Area | 4,522 sqft (0.104 acres) |
| Garage Type | Attached |
| Garage Area | 400 sqft |
| Parking Spaces | 2 Parking Spaces |
| Patio Area | 140 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Account Number | R0106575 |
|---|---|
| Street Address | 3397 SENTINEL DR |
| City | BOULDER |
| State | CO |
| Zip | 80301-5450 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 4 BLK 3 NORTHCREEK SUB |
| Legal Range | 70 |
| Legal Township | 1N |
| Legal Section | 21 |
| Legal Subdivision | NORTHCREEK SUBDIVISION - BO |
| Legal Block | 3 |
| Legal Lot Number | 4 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 2 |
| Census Block | 2008 |
| Census Tract | 12207 |
Source: Boulder County assessment roll, 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 | Individual Name on File |
|---|---|
| Mailing Address | 3397 SENTENIEL DR, BOULDER, CO 80301 |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Sep 13, 2018 | Intrafamily Transfer, Transfer · ARM GUARANTY BANK & TRUST CO |
| Feb 27, 2018 | Deed of Trust, Mortgage · Line of Credit RED ROCKS CU |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Dec 23, 2015 · Amount on Record |
| Deed Sale | Dec 23, 2015 · Amount on Record |
| Prior Sale | Jul 28, 2008 · Amount on Record |
| Deed Document Number | 20153492473 |
| Last Transfer Date | Sep 7, 2018 |
| Transfer Doc | 0003676123 |
| Record Updated | Sep 20, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Sep 13, 2018 |
| Property Address | 3397 SENTINEL DR, BOULDER, CO 80301-5450 |
| Document Number | 0003676123 |
| Instrument Date | Sep 7, 2018 |
| Instrument | 3676123 |
| Transaction Type | Transfer |
| Record Updated | Mar 31, 2022 |
| Title Company | STEWART TITLE |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|---|
| Address | 00000 |
| Name | Verified Name |
|---|---|
| Address | 3397 SENTINEL DR, BOULDER, CO 80301-5450 |
| Document Number | 0003676124 |
|---|---|
| Date | Sep 13, 2018 |
| Instrument | 3676124 |
| Name | GUARANTY BANK & TRUST CO |
|---|---|
| Type | Bank |
| Type | ARM |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Oct 1, 2048 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 4% |
| Type Change Date | Oct 1, 2025 |
| Change Frequency | Annually |
| Min Rate At Change | 3.5% |
| Max Rate At Change | 6% |
| Index | 1-Year CMT |
| Max Rate | 9% |
| Document Number | 0003676125 |
|---|---|
| Date | Sep 13, 2018 |
| Instrument | 3676125 |
| Name | RED ROCKS CU |
|---|---|
| Type | Credit Union |
| Address | LITTLETON, CO 80120 |
| Amount | Amount Recorded |
|---|---|
| Term | 241 Months |
| Due | Oct 7, 2038 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BOULDER CO |
| Property Address | 3397 SENTINEL DR, BOULDER, CO 80301-5450 |
| Document Number | 0003648740 |
| Instrument Date | Feb 27, 2018 |
| Transaction Type | Mortgage |
| Record Updated | Apr 12, 2018 |
| Name | Verified Name |
|---|---|
| Address | 3397 SENTINEL DR BOULDER CO 803015450, BOULDER, CO 80301-5450 |
| Document Number | 0003648740 |
|---|---|
| Date | Apr 3, 2018 |
| Instrument | 3648740 |
| Name | RED ROCKS CU |
|---|---|
| Address | 8195 SOUTHPARK LN, LITTLETON, CO 80120-4520 |
| Type | Line of Credit |
|---|---|
| Amount | Amount Recorded |
| Term | 300 Months |
| Due | Apr 2, 2043 |
| Rate Type | Adjustable Rate |
|---|
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 | $62,295 (+8.8%) Land $34,367 Building $27,928 | $916,100 (-) Land $505,400 Building $410,700 | |
| 2025 | $5,459.00 (-5.42%) | $57,257 (-18.82%) Land $31,588 Building $25,669 | $916,100 (-12.98%) Land $505,400 Building $410,700 |
| 2023 | $5,772.00 (+13.89%) | $70,531 (+29.21%) Land $29,855 Building $40,676 | $1,052,700 (+34.03%) Land $445,600 Building $607,100 |
| 2022 | $5,068.00 | $54,585 Land $25,166 Building $29,419 | $785,400 Land $362,100 Building $423,300 |
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 |
| Flood Insurance Cost | Premium on Record median of 20 policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 20 in force |
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 | 0.03% annual chance |
| Exposure | None beyond ember reach |
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 108 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Ayva Fixed Wireless | 2,500 / 2,500 |
| Xfinity Cable · Fiber in parts of the area | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| Live Wire Networks Fixed Wireless | 250 / 100 |
| Lumen Technologies DSL · Fiber in parts of the area | 140 / 20 |
| T-Mobile USA Fixed Wireless | 100 / 20 |
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