4630 Sioux Dr, Boulder, CO 80303 Property Records

Boulder County property record for 4630 Sioux Dr, Boulder, CO 80303

Property Summary

Property Type	Single Family Home
Details	5 bd · 3 ba · 2,464 sqft · built 1961
Lot Size	0.252 acres (10,985 sqft)
Owner	2 Individual Names on Record
Last Sale	$1,197,909 (Aug 2023)
Tax Bill	$7,122 (2025)
Deeds & Mortgages	Aug 2023 Sale & Mortgage Apr 2022 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`1577-04-3-01-008`

Property Details

APN / Parcel Number

Primary APN	`1577-04-3-01-008`
Alternative APNs	`R0015409` `0015409`

Interior

Bedrooms	5 Beds
Full Baths	3 Baths
Half Baths	2 Half Baths
Total Rooms	6 Rooms
Stories	1 Story
Building Area	2,464 sqft Living Area
Gross Area	2,968 sqft
1st Floor Area	1,232 sqft
Basement Area	1,232 sqft
Finished Basement	1,232 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1961
Effective Year Built	Effective 2005
Architectural Style	Ranch
Exterior Material	Brick Veneer
Construction Type	Masonry / Concrete Block
Roof Material	Asphalt
Lot Area	10,985 sqft (0.252 acres)
Garage Type	Attached
Garage Area	504 sqft
Parking Spaces	2 Parking Spaces
Patio Area	364 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0015409
Street Address	4630 SIOUX DR
City	BOULDER
State	CO
Zip	80303-3820
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 8 BLK 6 KEEWAYDIN
Legal Range	70
Legal Township	1S
Legal Section	04
Legal Subdivision	KEEWAYDIN - BO
Legal Block	6
Legal Lot Number	8
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	1
Census Block	1006
Census Tract	12511

Owner

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	2 Individual Names on Record
Mailing Address	4630 SIOUX DR, BOULDER, CO 80303-3820
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Aug 3, 2023	Special Warranty Deed, Transfer · Conventional Mortgage PNC BANK NA
Apr 19, 2022	Warranty Deed, Transfer · Stand-Alone First Mortgage HORSETOOTH FINANCIAL GROUP INC

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Aug 3, 2023 · Amount on Record
Deed Sale	Aug 3, 2023 · Amount on Record
Prior Sale	Apr 19, 2022 · Amount on Record
Deed Document Number	20234016958
Record Updated	Oct 29, 2026

August 2023: Special Warranty Deed, Transfer

Document Type	Special Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Aug 3, 2023
Property Address	4630 SIOUX DR, BOULDER, CO 80303-3820
Document Number	0004016958
Instrument Date	Jul 27, 2023
Instrument	4016958
Transaction Type	Transfer
Record Updated	Aug 29, 2023
Title Company	FIRST AMERICAN TITLE

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$119.79
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	4630 SIOUX DR, BOULDER, CO 80303-3820

Mortgage

Document Number	0004016960
Date	Aug 3, 2023
Instrument	4016960

Lender

Name	PNC BANK NA
Type	Bank

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Aug 1, 2053

Interest

Rate Type	Adjustable Rate
Rate	5.75%
Adjustable	Adjustable Rate Rider
Type Change Date	Aug 1, 2033
Change Frequency	6 Months
Min Rate At Change	3%
Max Rate At Change	10.7%
Margin	3
Max Rate	10.7%

April 2022: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Apr 19, 2022
Property Address	4630 SIOUX DR, BOULDER, CO 80303-3820
Document Number	0003957378
Instrument Date	Apr 15, 2022
Instrument	3957378
Transaction Type	Transfer
Record Updated	May 3, 2022
Title Company	FIDELITY NATIONAL TITLE

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$95.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	4630 SIOUX DR, BOULDER, CO 80303-3820

Mortgage

Document Number	0003957379
Date	Apr 19, 2022
Instrument	3957379

Lender

Name	HORSETOOTH FINANCIAL GROUP INC

Agreement

Type	Stand-Alone First Mortgage
Amount	Amount Recorded

Tax Assessment & Valuation

Source: Boulder County assessment roll, as of September 18, 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		$76,507 (+2.43%) Land $45,513 Building $30,994	$1,195,100 (-) Land $739,300 Building $455,800
2025	$7,122.00 (+40.67%)	$74,694 (+19.85%) Land $46,206 Building $28,488	$1,195,100 (+28.48%) Land $739,300 Building $455,800
2023	$5,063.00 (+34.26%)	$62,323 (+32.16%) Land $56,091 Building $6,232	$930,200 (+37.1%) Land $837,180 Building $93,020
2022	$3,771.00	$47,156 Land $40,227 Building $6,929	$678,500 Land $578,800 Building $99,700

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 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	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

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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