1. Home
  2. Colorado
  3. Boulder County
  4. Boulder
  5. Sioux Dr

4950 Sioux Dr, Boulder, CO 80303 Property Records

Boulder County property record for 4950 Sioux Dr, Boulder, CO 80303

Property Summary

Property TypeSingle Family Home
Details3 bd · 2.5 ba · 2,274 sqft · built 1961
Lot Size0.263 acres (11,457 sqft)
Owner2 Individual Names on File
Last Sale$435,000 (Mar 2024)
Tax Bill$5,839 (2025)
Deeds & MortgagesMar 2024 Sale
Dec 2020 Sale
+ 2 more
Flood ZoneZone AE (high risk)
APN1577-04-3-01-019

Property Details

APN / Parcel Number

Primary APN1577-04-3-01-019
Alternative APNs
  • R0015192
  • 0015192

Interior

Bedrooms3 Beds
Full Baths2.5 Baths
Half Baths2 Half Baths
Total Rooms7 Rooms
Building Area2,274 sqft Living Area
Gross Area2,610 sqft
1st Floor Area1,469 sqft
Basement Area805 sqft
Finished Basement805 sqft
Interior WallsWallboard/Drywall

Exterior

Year BuiltBuilt 1961
Effective Year BuiltEffective 1978
Architectural StyleSplit Level
Exterior MaterialBrick Veneer
Construction TypeMasonry / Concrete Block
Lot Area11,457 sqft (0.263 acres)
Garage TypeAttached
Garage Area336 sqft
Parking Spaces1 Parking Space
Deck Area336 sqft
Patio Area644 sqft

Utilities, Heating & Cooling

Heating SystemForced Air with A/C

Location & Zoning

Account NumberR0015192
Street Address4950 SIOUX DR
CityBOULDER
StateCO
Zip80303-3826
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionLOT 19 BLK 6 KEEWAYDIN
Legal Range70
Legal Township1S
Legal Section04
Legal SubdivisionKEEWAYDIN - BO
Legal Block6
Legal Lot Number19
JurisdictionBOULDER CO
Township / Civil DivisionBOULDER
Census Block Group1
Census Block1006
Census Tract12511

Owner

4950 Sioux Dr is owned and occupied by two individuals who bought it in March 2024.

Source: Boulder County records, as of September 18, 2026

Owner of Record2 Individual Names on File
Mailing Address4950 SIOUX DR, BOULDER, CO 80303-3826
OccupancyOwner Occupied
Owner TypeIndividual
VestingJoint Tenants

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

DateDocument
Mar 19, 2024Warranty Deed, Transfer
Dec 3, 2020Warranty Deed, Transfer
FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO
Sep 14, 2020Grant Deed, Transfer
LAND TITLE GUARANTEE
Sep 9, 2020Grant Deed, Transfer
LAND TITLE GUARANTEE

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleMar 19, 2024 · Amount on File
Deed SaleMar 19, 2024 · Amount on File
Prior SaleDec 3, 2020 · Amount on File
Deed Document Number20244040095
Record UpdatedOct 29, 2026

March 2024: Warranty Deed, Transfer

Document TypeWarranty Deed
JurisdictionBOULDER CO
Recording DateMar 19, 2024
Property Address4950 SIOUX DR, BOULDER, CO 80303-3826
Document Number0004040095
Instrument DateFeb 27, 2024
Instrument4040095
Transaction TypeTransfer
Record UpdatedApr 22, 2024

Transaction

AmountAmount on Record
Tax$43.50
Amount AccuracyFull Amount Stated
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipJoint Tenants
Address4950 SIOUX DR, BOULDER, CO 80303-3826

December 2020: Warranty Deed, Transfer

Document TypeWarranty Deed
JurisdictionBOULDER CO
Recording DateDec 3, 2020
Property Address4950 SIOUX DR, BOULDER, CO 80303-3826
Document Number0003838461
Instrument DateNov 10, 2020
Instrument3838461
Transaction TypeTransfer
Record UpdatedJan 11, 2021
Title CompanyFIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO

Transaction

AmountAmount on Record
Tax$63.00
Amount AccuracyConfirmed
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
Address13982 W BOWLES AVENUE SITE 200 LITTLETON CO 80127, LITTLETON, CO 80127

September 2020: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionBOULDER CO
Recording DateSep 14, 2020
Property Address4950 SIOUX DR, BOULDER, CO 80303-3826
Document Number0003814927
Instrument DateAug 31, 2020
Instrument3814927
Transaction TypeTransfer
Record UpdatedOct 19, 2020
Title CompanyLAND TITLE GUARANTEE

Transaction

AmountAmount on Record
Tax$60.00
Amount AccuracyConfirmed
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipCompany
Address4560 KING ST DENVER CO 802111356, DENVER, CO 80211-1356

September 2020: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionBOULDER CO
Recording DateSep 9, 2020
Property Address4950 SIOUX DR, BOULDER, CO 80303-3826
Document Number0003813524
Instrument DateAug 31, 2020
Instrument3813524
Transaction TypeTransfer
Record UpdatedOct 5, 2020
Title CompanyLAND TITLE GUARANTEE

Transaction

AmountAmount on Record
Tax$60.00
Amount AccuracyConfirmed
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipCompany
Address2000 S COLORADO BOULEVARD 1-1300 DENVER CO 80222, DENVER, CO 80222
InvestorPossibly a Property Investor

Tax Assessment & Valuation

The 2025 property tax bill for 4950 Sioux Dr was $5,839.

Source: Boulder County assessment roll, as of September 18, 2026

Property Jurisdictions

TypeName
StateColorado
CountyBoulder County
MunicipalityBoulder City
Unified School DistrictBoulder Valley School District RE-2 (PK - 12)

Tax Bill & Assessment History

YearTax BillAssessed ValueAssessed Market Value
2026$61,866 (+1.03%) Land $46,580 Building $15,286$979,800 (-) Land $755,000 Building $224,800
2025$5,839.00$61,238 Land $47,188 Building $14,050$979,800 Land $755,000 Building $224,800
2023$4,508.00 (-8.34%)$55,892 (+5.54%) Land $33,534 Building $22,358$834,200 (+9.48%) Land $500,500 Building $333,700
2022$4,918.00$52,960 Land $40,658 Building $12,302$762,000 Land $585,000 Building $177,000

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.

Flood

FEMA maps place 4950 Sioux Dr in Zone AE, a high-risk flood area; flood insurance is required for federally backed loans.

Source: FEMA National Flood Hazard Layer, effective October 14, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood ZoneZone AE
high risk
100-Year FloodplainYes
1% annual chance
FloodwayNo
Base Flood ElevationVaries along the reach; see FIRM
Flood Insurance RequirementRequired
federally backed loans
Flood Insurance CostPremium on File
median of 67 individual policies
Community Rating SystemClass 5 (25% premium discount)
Nearby Flood Policies174 units insured
incl. 107 condo units
Nearby Flood Claims107 (1982–2023)
Claims Outside the SFHA83 of 107
Most Recent ClaimSep 2023 · rainfall accumulation
Claims by Event
  • Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 89 claims

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

Wildfire risk around 4950 Sioux Dr is low, with a 0.02% annual chance of wildfire.

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire RiskLow
lower than 80% of the US · lower than 91% of Colorado
Wildfire Likelihood0.02% annual chance
ExposureNone
beyond ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water SystemCITY OF BOULDER
serves 166,080 people · EPA ID CO0107152
Water SourceSurface water
Last State InspectionSep 2024
Lead2 ppb (2023–2025)
action level 15 ppb

Violations Reported to EPA

Water QualityHaloacetic acids
resolved · Jul 2017
Treatment and ProcedureNone
last 10 years
Monitoring and Reporting1
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.

Internet Providers

Source: FCC Broadband Data Collection, based on 339 locations within half a mile, as of December 31, 2025

ProviderMax 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

Nearby Properties on Sioux Dr

Nearby Streets

Search Property Records by Address or Parcel Number

Search by:

By searching, you agree to: Terms • Privacy • Disclosures