Boulder County property record for 4800 Sioux Dr, Boulder, CO 80303
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 2.5 ba · 2,576 sqft · built 1962 |
| Lot Size | 0.299 acres (13,004 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $232,000 (Feb 1998) |
| Tax Bill | $5,736 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 1577-04-3-01-014 |
| Primary APN | 1577-04-3-01-014 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 2 Half Baths |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 2,576 sqft Living Area |
| Gross Area | 3,056 sqft |
| 1st Floor Area | 1,288 sqft |
| Basement Area | 1,288 sqft |
| Finished Basement | 1,288 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1962 |
|---|---|
| Effective Year Built | Effective 1975 |
| Architectural Style | Ranch |
| Exterior Material | Brick Veneer |
| Construction Type | Masonry / Concrete Block |
| Lot Area | 13,004 sqft (0.299 acres) |
| Garage Type | Attached |
| Garage Area | 480 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Porch |
| Porch Area | 240 sqft |
| Heating System | Hot Water |
|---|
| Account Number | R0015002 |
|---|---|
| Street Address | 4800 SIOUX DR |
| City | BOULDER |
| State | CO |
| Zip | 80303-3824 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 14 BLK 6 KEEWAYDIN |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 04 |
| Legal Subdivision | KEEWAYDIN - BO |
| Legal Block | 6 |
| Legal Lot Number | 14 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 1 |
| Census Block | 1006 |
| Census Tract | 12511 |
Source: Boulder County records, as of September 18, 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 Record |
|---|---|
| Mailing Address | 4800 SIOUX DR, BOULDER, CO 80303-3824 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Feb 23, 1998 · Amount on Record |
| Deed Sale | Feb 23, 1998 · Amount on Record |
| Prior Sale | May 18, 1993 · Amount on Record |
| Deed Document Number | 19981773913 |
| Last Transfer Date | Jul 19, 1999 |
| Transfer Doc | 0001970696 |
| Record Updated | Oct 29, 2026 |
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 | $60,697 (+0.89%) Land $49,939 Building $10,758 | $962,600 (-) Land $804,400 Building $158,200 | |
| 2025 | $5,736.00 (+2.52%) | $60,163 (-12.15%) Land $50,275 Building $9,888 | $962,600 (-5.82%) Land $804,400 Building $158,200 |
| 2023 | $5,595.00 (+16.56%) | $68,481 (+32.47%) Land $60,253 Building $8,228 | $1,022,100 (+37.42%) Land $899,300 Building $122,800 |
| 2022 | $4,800.00 | $51,694 Land $43,312 Building $8,382 | $743,800 Land $623,200 Building $120,600 |
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 |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record 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.
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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