Boulder County property record for 4990 Sioux Dr, Boulder, CO 80303
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 2.25 ba · 2,120 sqft · built 1961 |
| Lot Size | 0.265 acres (11,528 sqft) |
| Owner | Company Name on Record |
| Last Sale | $439,000 (Aug 2007) |
| Tax Bill | $5,359 (2025) |
| Flood Zone | Zone AE (high risk) |
| APN | 1577-04-3-01-020 |
| Primary APN | 1577-04-3-01-020 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 2.25 Baths |
| Half Baths | 2 Half Baths |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 2,120 sqft Living Area |
| Gross Area | 3,014 sqft |
| 1st Floor Area | 1,474 sqft |
| Basement Area | 1,036 sqft |
| Finished Basement | 646 sqft |
| Unfinished Basement | 390 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1961 |
|---|---|
| Effective Year Built | Effective 1985 |
| Architectural Style | Ranch |
| Exterior Material | Brick Veneer |
| Construction Type | Masonry / Concrete Block |
| Roof Material | Asphalt |
| Lot Area | 11,528 sqft (0.265 acres) |
| Garage Type | Attached |
| Garage Area | 504 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Porch |
| Porch Area | 270 sqft |
| Deck Area | 192 sqft |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0014841 |
|---|---|
| Street Address | 4990 SIOUX DR |
| City | BOULDER |
| State | CO |
| Zip | 80303-3826 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 20 LESS S 20 FT OF E 25 FT BLK 6 KEEWAYDIN |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 04 |
| Legal Subdivision | KEEWAYDIN - BO |
| Legal Block | 6 |
| Legal Lot Number | 20 |
| 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 | Company Name on Record |
|---|---|
| Mailing Address | 1353 KING AVE, BOULDER, CO 80302-7835 |
| Owner Type | Company |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Aug 3, 2007 · Amount on Record |
| Deed Sale | Aug 3, 2007 · Amount on Record |
| Prior Sale | Aug 10, 1998 · Amount on Record |
| Deed Document Number | 20072873664 |
| 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 | $56,392 (+0.33%) Land $40,528 Building $15,864 | $899,300 (-) Land $666,000 Building $233,300 | |
| 2025 | $5,359.00 (+3.54%) | $56,206 (-11.66%) Land $41,625 Building $14,581 | $899,300 (-5.3%) Land $666,000 Building $233,300 |
| 2023 | $5,176.00 (+16.39%) | $63,623 (+32.85%) Land $50,176 Building $13,447 | $949,600 (+37.8%) Land $748,900 Building $200,700 |
| 2022 | $4,447.00 | $47,892 Land $36,216 Building $11,676 | $689,100 Land $521,100 Building $168,000 |
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 AE high risk |
|---|---|
| 100-Year Floodplain | Yes 1% annual chance |
| Floodway | No |
| Base Flood Elevation | Varies along the reach; see FIRM |
| Flood Insurance Requirement | Required federally backed loans |
| 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 | 0.02% 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 339 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 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
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