4135 Riverside Ave, Boulder, CO 80304 Property Records

Boulder County property record for 4135 Riverside Ave, Boulder, CO 80304

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,568 sqft · built 1983
Lot Size	0.036 acres (1,545 sqft)
Owner	Individual Name on Record
Last Sale	$810,000 (Oct 2022)
Tax Bill	$4,756 (2025)
Deeds & Mortgages	Nov 2025 Mortgage Nov 2023 Line of Credit + 2 more
Flood Zone	Zone X (minimal risk)
APN	`1463-18-3-35-003`

Property Details

APN / Parcel Number

Primary APN	`1463-18-3-35-003`
Alternative APNs	`R0094447` `0094447`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	6 Rooms
Stories	2 Stories
Building Area	1,568 sqft Living Area
Gross Area	1,644 sqft
1st Floor Area	492 sqft
Upper Floors Area	660 sqft
Basement Area	492 sqft
Finished Basement	416 sqft
Unfinished Basement	76 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	1,545 sqft (0.036 acres)
Garage Type	Detached
Deck Area	77 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0094447
Street Address	4135 RIVERSIDE AVE
City	BOULDER
State	CO
Zip	80304-1127
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 30B WILDWOOD REPLAT B SEE ALSO ID 99246 FOR GARAGE PER REC 632209
Legal Range	70
Legal Township	1N
Legal Section	18
Legal Subdivision	WILDWOOD REPLAT B - BO
Legal Block	3
Legal Lot Number	30B
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	Individual Name on Record
Mailing Address	4135 RIVERSIDE AVE, BOULDER, CO 80304-1127
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Nov 20, 2025	Deed of Trust, Mortgage · Conventional Mortgage ELEVATIONS CU
Nov 27, 2023	Deed of Trust, Mortgage · Line of Credit ELEVATIONS CU
Apr 12, 2023	Deed of Trust, Mortgage · Line of Credit ELEVATIONS CU
Oct 5, 2022	Warranty Deed, Transfer LAND TITLE GUARANTEE

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Oct 5, 2022 · Amount on Record
Deed Sale	Oct 5, 2022 · Amount on Record
Prior Sale	May 20, 2011 · Amount on Record
Deed Document Number	20223984062
Prior Transfer Date	Jan 14, 2000
Prior Transfer Doc	0002015087
Record Updated	Oct 29, 2026

November 2025: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	4135 RIVERSIDE AVE, BOULDER, CO 80304-1127
Transaction Type	Mortgage
Record Updated	Dec 12, 2025
Title Company	HOMESTEAD TITLE AND ESCROW, HOMESTEAD TITLE & ESCROW

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	4135 RIVERSIDE AVE, BOULDER, CO 80304-1127

Mortgage

Document Number	0004110504
Date	Nov 20, 2025
Instrument	4110504

Lender

Name	ELEVATIONS CU
Type	Credit Union
Address	BOULDER, CO 80301

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Dec 1, 2055

November 2023: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	4135 RIVERSIDE AVE, BOULDER, CO 80304-1127
Transaction Type	Mortgage
Record Updated	Dec 13, 2023

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0004029412
Date	Nov 27, 2023
Instrument	4029412

Lender

Name	ELEVATIONS CU
Type	Credit Union
Address	BOULDER, CO 80301

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	240 Months
Due	Nov 26, 2043

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

April 2023: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	4135 RIVERSIDE AVE, BOULDER, CO 80304-1127
Transaction Type	Mortgage
Record Updated	Apr 19, 2023

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0004003657
Date	Apr 12, 2023
Instrument	4003657

Lender

Name	ELEVATIONS CU
Type	Credit Union
Address	BOULDER, CO 80301

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	240 Months
Due	Apr 11, 2043

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

October 2022: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Oct 5, 2022
Property Address	4135 RIVERSIDE AVE, BOULDER, CO 80304-1127
Document Number	0003984062
Instrument Date	Sep 9, 2022
Instrument	3984062
Transaction Type	Transfer
Record Updated	Oct 12, 2022
Title Company	LAND TITLE GUARANTEE

Transaction

Amount	Amount Recorded
Tax	$81.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name
Address	4135 RIVERSIDE AVE, 4135, BOULDER, CO 80304-1127

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	4135 RIVERSIDE AVE, BOULDER, CO 80304-1127

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		$49,518 (-0.74%) Land $15,294 Building $34,224	$798,200 (-) Land $294,900 Building $503,300
2025	$4,756.00 (+4.85%)	$49,887 (-11.25%) Land $18,431 Building $31,456	$798,200 (-4.86%) Land $294,900 Building $503,300
2023	$4,536.00 (+12.98%)	$56,213 (+29.99%) Land $19,028 Building $37,185	$839,000 (+34.84%) Land $284,000 Building $555,000
2022	$4,015.00	$43,243 Land $15,415 Building $27,828	$622,200 Land $221,800 Building $400,400

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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