Boulder County property record for 5660 Sioux Dr, Boulder, CO 80303
| Property Type | Exempt (Full or Partial) |
|---|---|
| Lot Size | 8.74 acres (380,801 sqft) |
| Owner | Company Name on File |
| Deeds & Mortgages | May 2023 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 1577-04-4-00-001 |
| Primary APN | 1577-04-4-00-001 |
|---|---|
| Alternative APNs |
|
| Lot Area | 380,801 sqft |
|---|
| Account Number | R0106416 |
|---|---|
| Street Address | 5660 SIOUX DR |
| City | BOULDER |
| State | CO |
| Zip | 80303-4145 |
| Property Category | Other |
| Property Type | Other > Exempt (Full or Partial) |
| Legal Description | PT TR 2811 4-1S-70 PER DEED 602915 02/08/84 BCR 20.50 LESS 12.13 AC TOTAL 8.37 AC M/L PER ANNEX ORD 5056 868237 08/04/87 BCR TAX AREA SPLIT FROM ID 37199 |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 04 |
| Legal Subdivision | TR, NBR 140, 150, 164, 166 |
| Legal Tract | 2811 |
| Legal Block | 1 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 1 |
| Census Block | 1005 |
| Census Tract | 12501 |
5660 Sioux Dr is owned by a company that acquired it in February 1984.
Source: Boulder County records, as of June 15, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | PO BOX 791, BOULDER, CO 80306-0791 |
| Owner Type | Company |
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 | Name on Deed |
|---|---|
| Last Sale | Feb 8, 1984 |
| Deed Sale | Feb 8, 1984 |
| Deed Document Number | 1984602915 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BOULDER CO |
| Property Address | 5660 SIOUX DR, BOULDER, CO 80303-4145 |
| Transaction Type | Mortgage |
| Record Updated | May 11, 2023 |
| Name | Verified Name |
|---|
| Document Number | 0004006190 |
|---|---|
| Date | May 4, 2023 |
| Instrument | 4006190 |
| Name | KITSAP BANK |
|---|---|
| Type | Bank |
| Address | PORT ORCHARD, WA 98366 |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 120 Months |
| Due | May 1, 2033 |
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 | $4,269,070 (-3.7%) Land $4,269,070 | $16,419,500 (-) Land $16,419,500 | |
| 2025 | Additional exemption filed | $4,433,265 Land $4,433,265 | $16,419,500 Land $16,419,500 |
| 2023 | Additional exemption filed | $2,054,641 Land $2,054,641 | $7,364,304 Land $7,364,304 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 5660 Sioux Dr in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
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 |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on File median of 94 individual policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 430 units insured incl. 336 condo units |
| Nearby Flood Claims | 95 (2013) |
| Claims Outside the SFHA | 84 of 95 |
| Most Recent Claim | Sep 2013 · Severe Storms, 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 5660 Sioux Dr is moderate, ranking above 45% of the US, with a 0.09% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 45% of the US · lower than 72% of Colorado |
|---|---|
| Wildfire Likelihood | 0.09% annual chance |
| Exposure | Direct burnable vegetation |
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 275 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Ayva Networks Fixed Wireless | 2,500 / 2,500 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| LiveWireNet Fixed Wireless | 250 / 100 |
| CenturyLink DSL | 140 / 20 |
May also be available: AT&T, T-Mobile.
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