Boulder County property record for 4660 Sioux Dr, Boulder, CO 80303
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2 ba · 1,540 sqft · built 1960 |
| Lot Size | 0.239 acres (10,403 sqft) |
| Owner | Trust Name on File |
| Last Sale | $410,000 (Jan 2007) |
| Tax Bill | $5,093 (2025) |
| Deeds & Mortgages | Feb 2019 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 1577-04-3-01-009 |
| Primary APN | 1577-04-3-01-009 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 7 Rooms |
| Stories | 2 Stories |
| Building Area | 1,540 sqft Living Area |
| Gross Area | 2,112 sqft |
| 1st Floor Area | 910 sqft |
| Upper Floors Area | 630 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1960 |
|---|---|
| Effective Year Built | Effective 1970 |
| Exterior Material | Brick Veneer |
| Construction Type | Masonry / Concrete Block |
| Roof Material | Asphalt |
| Lot Area | 10,403 sqft (0.239 acres) |
| Garage Type | Attached |
| Garage Area | 572 sqft |
| Parking Spaces | 2 Parking Spaces |
| Deck Area | 91 sqft |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0014980 |
|---|---|
| Street Address | 4660 SIOUX DR |
| City | BOULDER |
| State | CO |
| Zip | 80303-3820 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 9 BLK 6 KEEWAYDIN |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 04 |
| Legal Subdivision | KEEWAYDIN - BO |
| Legal Block | 6 |
| Legal Lot Number | 9 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 1 |
| Census Block | 1006 |
| Census Tract | 12511 |
4660 Sioux Dr is held in a trust since November 2018.
Source: Boulder County records, as of September 18, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 2561 CARMELITA WAY, PINOLE, CA 94564-1219 |
| Owner Type | Company |
| Vesting | Trust, Family Trust |
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 | Jan 23, 2007 · Amount on File |
| Deed Sale | Jan 23, 2007 · Amount on File |
| Prior Sale | Jul 31, 1998 · Amount on File |
| Deed Document Number | 20072831432 |
| Last Transfer Date | Nov 19, 2018 |
| Transfer Doc | 0003697682 |
| Record Updated | Oct 29, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Feb 12, 2019 |
| Property Address | 4660 SIOUX DR, BOULDER, CO 80303-3820 |
| Document Number | 0003697682 |
| Instrument Date | Nov 19, 2018 |
| Instrument | 3697682 |
| Transaction Type | Transfer |
| Record Updated | Feb 20, 2019 |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Personal Trust |
| Address | 2561 CARMELITA WAY PINOLE CA 945641219, PINOLE, CA 94564-1219 |
The 2025 property tax bill for 4660 Sioux Dr was $5,093.
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 | $52,435 (-0.25%) Land $44,166 Building $8,269 | $841,100 (-) Land $719,500 Building $121,600 | |
| 2025 | $5,093.00 | $52,569 Land $44,969 Building $7,600 | $841,100 Land $719,500 Building $121,600 |
| 2023 | $5,005.00 (+14.53%) | $60,782 (+31.39%) Land $54,704 Building $6,078 | $907,200 (+36.3%) Land $816,480 Building $90,720 |
| 2022 | $4,370.00 | $46,259 Land $39,149 Building $7,110 | $665,600 Land $563,300 Building $102,300 |
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.
FEMA maps place 4660 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 67 individual policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 174 units insured incl. 107 condo units |
| Nearby Flood Claims | 107 (1982–2023) |
| Claims Outside the SFHA | 83 of 107 |
| Most Recent Claim | Sep 2023 · rainfall accumulation |
| 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 4660 Sioux Dr is low, with a 0.01% 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 | 0.01% 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 331 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 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: AT&T, CenturyLink.
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