5145 Sioux Dr, Boulder, CO 80303 Property Records

Boulder County property record for 5145 Sioux Dr, Boulder, CO 80303

Property Summary

Property Type	Single Family Home
Details	5 bd · 4.25 ba · 2,712 sqft · built 1967
Lot Size	0.194 acres (8,436 sqft)
Owner	2 Individual Names on Record
Last Sale	$1,325,000 (Oct 2023)
Tax Bill	$7,672 (2025)
Deeds & Mortgages	Apr 2026 Mortgage Oct 2023 Sale & Mortgage + 3 more
Flood Zone	Zone X (moderate risk)
APN	`1577-04-1-11-008`

Property Details

APN / Parcel Number

Primary APN	`1577-04-1-11-008`
Alternative APNs	`R0015724` `0015724`

Interior

Bedrooms	5 Beds
Full Baths	4.25 Baths
Half Baths	1 Half Bath
Total Rooms	10 Rooms
Stories	2 Stories
Building Area	2,712 sqft Living Area
Gross Area	3,322 sqft
1st Floor Area	1,064 sqft
Upper Floors Area	690 sqft
Basement Area	1,064 sqft
Finished Basement	958 sqft
Unfinished Basement	106 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1967
Effective Year Built	Effective 2013
Exterior Material	Brick Veneer
Construction Type	Masonry / Concrete Block
Roof Material	Asphalt
Lot Area	8,436 sqft (0.194 acres)
Garage Type	Attached
Garage Area	504 sqft
Parking Spaces	2 Parking Spaces
Deck Area	286 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0015724
Street Address	5145 SIOUX DR
City	BOULDER
State	CO
Zip	80303-4123
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 8 BLK 1 KEEWAYDIN MEADOWS 2
Legal Range	70
Legal Township	1S
Legal Section	04
Legal Subdivision	KEEWAYDIN MEADOWS 2 - BO
Legal Block	1
Legal Lot Number	8
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	1
Census Block	1008
Census Tract	12501

Owner

Source: Boulder County records, 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 Record
Mailing Address	5145 SIOUX DR, BOULDER, CO 80303-4123
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Date	Document
Apr 9, 2026	Deed of Trust, Mortgage · Conventional Mortgage ELEVATIONS CREDIT UNION
Oct 16, 2023	Warranty Deed, Transfer · Conventional Mortgage ELEVATIONS CU
Sep 30, 2021	Special Warranty Deed, Transfer · Conventional Mortgage UNITED WHOLESALE MORTGAGE
Feb 7, 2018	Deed of Trust, Mortgage · Commercial Mortgage FIRST NATIONAL BANK OF OMAHA
Aug 21, 2018	Quit Claim Deed, Transfer Quitclaim

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Oct 16, 2023 · Amount on Record
Deed Sale	Oct 16, 2023 · Amount on Record
Prior Sale	Sep 30, 2021 · Amount on Record
Deed Document Number	20234025163
Prior Transfer Date	Jul 6, 2018
Prior Transfer Doc	0003672361
Record Updated	Sep 20, 2026

April 2026: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Recording Date	Apr 9, 2026
Property Address	5145 SIOUX DR, BOULDER, CO 80303-4123
Document Number	0004127299
Instrument Date	Apr 3, 2026
Instrument	20264127299
Transaction Type	Mortgage
Record Updated	Jul 12, 2026
Title Company	FIDELITY NATIONAL TITLE

Transaction

Tax	$0.00
Additional	Multiple Parcels

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	5145 SIOUX DR, BOULDER, CO 80303-4123

Mortgage

Document Number	0004127299,
Date	Apr 9, 2026
Instrument	20264127299

Lender

Name	ELEVATIONS CREDIT UNION

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	240 Months
Due	Apr 1, 2046

Interest

Rate Type	Fixed Rate
Rate	6%
Initial Type	Fixed Rate
Max Rate	-1%

October 2023: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Oct 16, 2023
Property Address	5145 SIOUX DR, BOULDER, CO 80303-4123
Document Number	0004025163
Instrument Date	Oct 13, 2023
Instrument	4025163
Transaction Type	Transfer
Record Updated	Nov 10, 2023
Title Company	LAND TITLE GUARANTEE

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$132.50
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name
Address	5145 SIOUX DR, BOULDER, CO 80303-4123

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	5145 SIOUX DR, BOULDER, CO 80303-4123

Mortgage

Document Number	0004025164
Date	Oct 16, 2023
Instrument	4025164

Lender

Name	ELEVATIONS CU
Type	Credit Union

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Nov 1, 2053

Interest

Rate Type	Adjustable Rate
Rate	6.62%
Adjustable	Adjustable Rate Rider
Type Change Date	Nov 1, 2030
Change Frequency	6 Months
Min Rate At Change	2.75%
Max Rate At Change	11.6%
Max Rate	11.6%

September 2021: Special Warranty Deed, Transfer

Document Type	Special Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Sep 30, 2021
Property Address	5145 SIOUX DR, BOULDER, CO 80303-4123
Document Number	0003917563
Instrument Date	Sep 23, 2021
Instrument	3917563
Transaction Type	Transfer
Record Updated	Oct 20, 2021
Title Company	FIRST AMERICAN TITLE

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$130.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	5145 SIOUX DR, BOULDER, CO 80303-4123

Mortgage

Document Number	0003917564
Date	Sep 30, 2021
Instrument	3917564

Lender

Name	UNITED WHOLESALE MORTGAGE
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Oct 1, 2051

February 2018: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	5145 SIOUX DR, BOULDER, CO 80303-4123
Transaction Type	Mortgage
Record Updated	Feb 5, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003639666
Date	Feb 7, 2018
Instrument	3639666

Lender

Name	FIRST NATIONAL BANK OF OMAHA
Type	Bank
Address	OMAHA, NE 68197

Agreement

Type	Commercial Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Feb 2, 2048

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

August 2018: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	BOULDER CO
Recording Date	Aug 21, 2018
Property Address	5145 SIOUX DR, BOULDER, CO 80303-4123
Document Number	0003672361
Instrument Date	Jul 6, 2018
Instrument	3672361
Transaction Type	Transfer
Record Updated	Aug 29, 2018

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants with Right of Survivorship
Address	5145 SIOUX DR BOULDER CO 803034123, BOULDER, CO 80303-4123

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		$87,550 (+8.8%) Land $44,057 Building $43,493	$1,287,500 (-) Land $647,900 Building $639,600
2025	$7,672.00 (+4.81%)	$80,469 (-7.48%) Land $40,494 Building $39,975	$1,287,500 (-0.82%) Land $647,900 Building $639,600
2024	$7,320.00 (+1.77%)
2023	$7,193.00 (+24.81%)	$86,979 (+40.15%) Land $48,528 Building $38,451	$1,298,200 (+45.38%) Land $724,300 Building $573,900
2022	$5,763.00	$62,063 Land $34,882 Building $27,181	$893,000 Land $501,900 Building $391,100

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 moderate risk
500-Year Floodplain	Yes 0.2% annual chance
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 94 individual policies
Community Rating System	Class 5 (25% premium discount)
Nearby Flood Policies	430 units insured incl. 336 condo units
Nearby Flood Claims	95 (2013)
Claims Outside the SFHA	84 of 95
Most Recent Claim	Sep 2013 · Severe Storms, Flooding, Landslides, And Mudslides
Claims by Event	Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 95 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	0.02% annual chance
Exposure	None beyond ember reach

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

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 275 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

May also be available: AT&T, T-Mobile.

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