4530 Sioux Dr, Boulder, CO 80303 Property Records

Boulder County property record for 4530 Sioux Dr, Boulder, CO 80303

Property Summary

Property Type	Single Family Home
Details	4 bd · 1.75 ba · 1,991 sqft · built 1967
Lot Size	0.229 acres (9,969 sqft)
Owner	2 Individual Names on File
Last Sale	$725,000 (Jan 2020)
Tax Bill	$6,584 (2025)
Deeds & Mortgages	Jan 2021 Mortgage Jan 2020 Sale & Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`1577-04-3-11-039`

Property Details

APN / Parcel Number

Primary APN	`1577-04-3-11-039`
Alternative APNs	`R0015133` `0015133`

Interior

Bedrooms	4 Beds
Full Baths	1.75 Baths
Half Baths	1 Half Bath
Total Rooms	8 Rooms
Stories	1 Story
Building Area	1,991 sqft Living Area
Gross Area	2,391 sqft
1st Floor Area	1,501 sqft
Basement Area	490 sqft
Finished Basement	490 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1967
Effective Year Built	Effective 1993
Architectural Style	Ranch
Exterior Material	Brick Veneer
Construction Type	Masonry / Concrete Block
Roof Material	Tar & Gravel
Lot Area	9,969 sqft (0.229 acres)
Garage Type	Attached
Garage Area	400 sqft
Parking Spaces	3 Parking Spaces
Patio Area	359 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0015133
Street Address	4530 SIOUX DR
City	BOULDER
State	CO
Zip	80303-3733
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 39 NAVAJO COURT
Legal Range	70
Legal Township	1S
Legal Section	04
Legal Subdivision	NAVAJO COURT - BO
Legal Block	2
Legal Lot Number	39
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	2
Census Block	2022
Census Tract	12511

Owner

Source: Boulder County assessment roll, as of June 15, 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	2 Individual Names on File
Mailing Address	4530 SIOUX DR, BOULDER, CO 80303-3733
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Jan 25, 2021	Deed of Trust, Mortgage · Conventional Mortgage BANK OF AMERICA NA
Jan 28, 2020	Warranty Deed, Transfer · Conventional Mortgage BANK OF AMERICA
Aug 15, 2017	Deed of Trust, Mortgage · Line of Credit ELEVATIONS CU

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Jan 28, 2020 · Amount on Record
Deed Sale	Jan 28, 2020 · Amount on Record
Prior Sale	Jun 27, 2012 · Amount on Record
Deed Document Number	20203763012
Record Updated	Sep 20, 2026

January 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	4530 SIOUX DR, BOULDER, CO 80303-3733
Transaction Type	Mortgage
Record Updated	Mar 10, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003852778
Date	Jan 25, 2021
Instrument	3852778

Lender

Name	BANK OF AMERICA NA
Type	Bank
Address	CHARLOTTE, NC 28255

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	362 Months
Due	Mar 1, 2051

January 2020: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Jan 28, 2020
Property Address	4530 SIOUX DR, BOULDER, CO 80303-3733
Document Number	0003763012
Instrument Date	Jan 27, 2020
Instrument	3763012
Transaction Type	Transfer
Record Updated	Feb 12, 2020
Title Company	FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on File
Loan-to-Value (LTV)	LTV on Record
Tax	$73.00
Amount Accuracy	Confirmed
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants with Right of Survivorship
Address	4530 SIOUX DR BOULDER CO 803033733, BOULDER, CO 80303-3733

Mortgage

Document Number	3763013
Date	Jan 28, 2020
Instrument	3763013

Lender

Name	BANK OF AMERICA
Type	Bank
Address	CHARLOTTE, NC 28255

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Jan 27, 2050

August 2017: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	4530 SIOUX DR, BOULDER, CO 80303-3733
Document Number	0003610087
Instrument Date	Aug 15, 2017
Transaction Type	Mortgage
Record Updated	Aug 29, 2017

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	4530 SIOUX DR BOULDER CO 803033733, BOULDER, CO 80303-3733

Mortgage

Document Number	0003610087
Date	Aug 21, 2017
Instrument	3610087

Lender

Name	ELEVATIONS CU
Address	BOULDER, CO 80301

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	240 Months
Due	Aug 20, 2037

Interest

Rate Type	Adjustable Rate

Tax Assessment & Valuation

Source: Boulder County assessment roll, as of June 15, 2026

Property Jurisdictions

Type	Name
State	Colorado
County	Boulder County
Municipality	Boulder City
Unified School District	Boulder Valley School District RE-2 (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$75,133 (+8.8%) Land $47,892 Building $27,241	$1,104,900 (-) Land $704,300 Building $400,600
2025	$6,584.00 (+0.6%)	$69,057 (-13.12%) Land $44,019 Building $25,038	$1,104,900 (-6.86%) Land $704,300 Building $400,600
2023	$6,545.00 (+19%)	$79,482 (+34.2%) Land $53,573 Building $25,909	$1,186,300 (+39.2%) Land $799,600 Building $386,700
2022	$5,500.00	$59,228 Land $38,322 Building $20,906	$852,200 Land $551,400 Building $300,800

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

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
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on Record median of 15 policies
Community Rating System	Class 5 (25% premium discount)
Nearby Flood Policies	15 in force
Nearby Flood Claims	5 (1982–2013)
Claims Outside the SFHA	5 of 5
Most Recent Claim	Sep 2013 · Severe Storms, Flooding, Landslides, And Mudslides
Claims by Event	Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 4 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

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.

Drinking Water

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

Violations Reported to EPA

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.

Internet Providers

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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