4105 Riverside Ave, Boulder, CO 80304 Property Records

Boulder County property record for 4105 Riverside Ave, Boulder, CO 80304

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,730 sqft · built 1983
Lot Size	0.051 acres (2,221 sqft)
Owner	2 Individual Names on Record
Last Sale	$550,000 (Apr 2017)
Tax Bill	$5,156 (2025)
Deeds & Mortgages	Jan 2022 Line of Credit Feb 2021 Mortgage + 2 more
Flood Zone	Zone X (minimal risk)
APN	`1463-18-3-35-006`

Property Details

APN / Parcel Number

Primary APN	`1463-18-3-35-006`
Alternative APNs	`R0094450` `0094450`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	6 Rooms
Stories	1 Story
Building Area	1,730 sqft Living Area
1st Floor Area	690 sqft
Upper Floors Area	624 sqft
Basement Area	416 sqft
Finished Basement	416 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1983
Effective Year Built	Effective 1990
Architectural Style	A-Frame
Exterior Material	Wood Shingle
Construction Type	Frame
Lot Area	2,221 sqft (0.051 acres)
Shed	1 Shed
Total Buildings	2 Buildings

Utilities, Heating & Cooling

Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0094450
Street Address	4105 RIVERSIDE AVE
City	BOULDER
State	CO
Zip	80304-1127
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 33B WILDWOOD REPLAT B
Legal Range	70
Legal Township	1N
Legal Section	18
Legal Subdivision	WILDWOOD REPLAT B - BO
Legal Block	3
Legal Lot Number	33B
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	3
Census Block	3001
Census Tract	12105

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	4105 RIVERSIDE AVE, BOULDER, CO 80304-1127
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Date	Document
Jan 6, 2022	Deed of Trust, Mortgage · Line of Credit ALLIANT CU
Feb 8, 2021	Deed of Trust, Mortgage · Conventional Mortgage BETTER MORTGAGE CORPORATION
Dec 9, 2019	Deed of Trust, Mortgage · Conventional Mortgage WYNDHAM CAPITAL MORTGAGE INC
Apr 11, 2017	Warranty Deed, Transfer · Conventional Mortgage PRIMARY RESIDENTIAL MORTGAGE

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Apr 11, 2017 · Amount on Record
Deed Sale	Apr 11, 2017 · Amount on Record
Prior Sale	Aug 26, 1997 · Amount on Record
Deed Document Number	20173585710
Prior Transfer Date	Aug 31, 2012
Prior Transfer Doc	0003273373
Record Updated	Oct 29, 2026

January 2022: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	4105 RIVERSIDE AVE, BOULDER, CO 80304-1127
Transaction Type	Mortgage
Record Updated	Jan 19, 2022
Title Company	FIRST AMERICAN

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003938825
Date	Jan 6, 2022
Instrument	3938825

Lender

Name	ALLIANT CU
Type	Credit Union
Address	CHICAGO, IL 60666

Agreement

Type	Line of Credit
Amount	Amount Recorded

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

February 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	4105 RIVERSIDE AVE, BOULDER, CO 80304-1127
Transaction Type	Mortgage
Record Updated	Feb 22, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003856938
Date	Feb 8, 2021
Instrument	3856938

Lender

Name	BETTER MORTGAGE CORPORATION
Type	Mortgage Company
Address	NEW YORK, NY 10007

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	445 Months
Due	Mar 1, 2058

December 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	4105 RIVERSIDE AVE, BOULDER, CO 80304-1127
Transaction Type	Mortgage
Record Updated	Feb 5, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003753681
Date	Dec 9, 2019
Instrument	3753681

Lender

Name	WYNDHAM CAPITAL MORTGAGE INC
Type	Mortgage Company
Address	CHARLOTTE, NC 28210

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Jan 1, 2050

April 2017: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Apr 11, 2017
Property Address	4105 RIVERSIDE AVE, BOULDER, CO 80304-1127
Document Number	0003585710
Instrument Date	Apr 7, 2017
Instrument	3585710
Transaction Type	Transfer
Record Updated	Mar 31, 2022
Title Company	LAND TITLE GUARANTEE CO

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$55.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name
Address	00000

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	4105 RIVERSIDE AVE, BOULDER, CO 80304-1127
Investor	Possibly a Property Investor

Mortgage

Document Number	0003585711
Date	Apr 11, 2017
Instrument	3585711

Lender

Name	PRIMARY RESIDENTIAL MORTGAGE
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	May 1, 2047

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		$54,080 (%) Land $19,284 Building $34,796	$865,300 (-) Land $353,600 Building $511,700
2025	$5,156.00 (+4.18%)	$54,081 (-11.34%) Land $22,100 Building $31,981	$865,300 (-4.95%) Land $353,600 Building $511,700
2023	$4,949.00 (+13.93%)	$60,997 (+30.39%) Land $22,814 Building $38,183	$910,400 (+35.25%) Land $340,500 Building $569,900
2022	$4,344.00	$46,781 Land $18,487 Building $28,294	$673,110 Land $266,000 Building $407,110

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
Nearest Special Flood Hazard Area	Zone AE, within 500 ft
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on Record median of 32 policies
Community Rating System	Class 5 (25% premium discount)
Nearby Flood Policies	32 in force
Nearby Flood Claims	26 (2005–2015)
Claims Outside the SFHA	10 of 26
Most Recent Claim	May 2015 · Severe Storms, Tornadoes, Flooding, Landslides, And Mudslides
Claims by Event	Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 23 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	Moderate above 46% of the US · lower than 71% of Colorado
Wildfire Likelihood	0.08% annual chance
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

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 460 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
LiveWireNet Fixed Wireless	250 / 100
T-Mobile Fixed Wireless	100 / 20

May also be available: AT&T, CenturyLink.

Cell Coverage

5G (outdoors only) and 4G LTE

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