3421 4th St, Boulder, CO 80304 Property Records

Boulder County property record for 3421 4th St, Boulder, CO 80304

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 5,022 sqft · built 1990
Lot Size	0.599 acres (26,072 sqft)
Owner	2 Company Names on Record
Last Sale	$1,750,000 (Sep 2004)
Tax Bill	$26,029 (2025)
Deeds & Mortgages	Sep 2026 Construction Loan Dec 2023 Transfer + 1 more
Flood Zone	Zone X (minimal risk)
APN	`1461-24-2-13-002`

Property Details

APN / Parcel Number

Primary APN	`1461-24-2-13-002`
Alternative APNs	`R0108936` `0108936`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Half Baths	3 Half Baths
Total Rooms	8 Rooms
Stories	2 Stories
Building Area	5,022 sqft Living Area
Gross Area	5,600 sqft
1st Floor Area	2,209 sqft
Upper Floors Area	1,592 sqft
Basement Area	1,271 sqft
Finished Basement	1,221 sqft
Unfinished Basement	50 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1990
Effective Year Built	Effective 1995
Exterior Material	Brick Veneer
Construction Type	Frame
Roof Material	Asphalt
Lot Area	26,072 sqft (0.599 acres)
Garage Type	Attached
Garage Area	528 sqft
Parking Spaces	2 Parking Spaces

Exterior Amenities

Porch	Porch
Porch Area	656 sqft
Deck Area	94 sqft
Patio Area	206 sqft

Utilities, Heating & Cooling

Cooling System	Evaporative
Heating System	Hot Water

Location & Zoning

Account Number	R0108936
Street Address	3421 4TH ST
City	BOULDER
State	CO
Zip	80304-1701
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 2 & NWLY TRI LOT 1 3403 FOURTH STREET
Legal Range	71
Legal Township	1N
Legal Section	24
Legal Subdivision	FOURTH STREET 3403 SUB
Legal Block	2
Legal Lot Number	2
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	2
Census Block	2010
Census Tract	12101

Owner

Source: Boulder County records, as of October 7, 2026

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

Owner of Record	2 Company Names on Record
Mailing Address	3421 4TH ST, BOULDER, CO 80304-1701
Owner Type	Company
Vesting	Life Tenant

Deeds, Mortgages & Sale History

Date	Document
Sep 30, 2026	Deed of Trust, Mortgage · Construction Mortgage FIDELITY NATIONAL TITLE
Dec 19, 2023	Intrafamily Transfer, Transfer
Feb 27, 2019	Deed of Trust, Mortgage · Line of Credit THIRD FSLA OF CLEVELAND

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Sep 16, 2004 · Amount on Record
Deed Sale	Sep 16, 2004 · Amount on Record
Prior Sale	Nov 5, 1991 · Amount on Record
Deed Document Number	20042627601
Record Updated	Oct 29, 2026

September 2026: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Recording Date	Sep 30, 2026
Property Address	3421 4TH ST, BOULDER, CO 80304-1701
Document Number	0004149022
Instrument Date	Sep 24, 2026
Instrument	20264149022
Transaction Type	Mortgage
Record Updated	Oct 7, 2026
Title Company	FIDELITY NATIONAL TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Life Tenant, 269

Mortgage

Document Number	0004149022,
Date	Sep 30, 2026
Instrument	20264149022

Lender

Agreement

Type	Construction Mortgage
Amount	Amount Recorded
Term	12 Months
Due	Sep 24, 2027

Interest

Rate Type	Balloon
Initial Type	Balloon
Max Rate	-1%

December 2023: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	BOULDER CO
Recording Date	Dec 19, 2023
Property Address	3421 4TH ST, BOULDER, CO 80304-1701
Document Number	0004031548
Instrument Date	Dec 18, 2023
Instrument	4031548
Transaction Type	Transfer
Record Updated	Jan 18, 2024

Transaction

Tax	$0.00
Amount Accuracy	No Consideration Stated
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Living Trust
Address	3421 4TH ST, BOULDER, CO 80304-1701

February 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	3421 4TH ST, BOULDER, CO 80304-1701
Transaction Type	Mortgage
Record Updated	Feb 5, 2021
Title Company	AMERICAN TITLE INC

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003699630
Date	Feb 27, 2019
Instrument	3699630

Lender

Name	THIRD FSLA OF CLEVELAND
Type	Lending Institution
Address	CLEVELAND, OH 44105

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	360 Months
Due	Feb 15, 2049

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

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		$292,257 (+7.06%) Land $208,875 Building $83,382	$4,367,900 (-) Land $3,141,700 Building $1,226,200
2025	$26,029.00 (-1.41%)	$272,994 (-11.77%) Land $196,356 Building $76,638	$4,367,900 (-5.42%) Land $3,141,700 Building $1,226,200
2023	$26,402.00 (+13.16%)	$309,412 (+24.38%) Land $216,289 Building $93,123	$4,618,100 (+29.02%) Land $3,228,200 Building $1,389,900
2022	$23,331.00	$248,761 Land $153,407 Building $95,354	$3,579,300 Land $2,207,300 Building $1,372,000

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 63 policies
Community Rating System	Class 5 (25% premium discount)
Nearby Flood Policies	63 in force
Nearby Flood Claims	25 (1990–2026)
Claims Outside the SFHA	17 of 25
Most Recent Claim	Jun 2026 · rainfall accumulation
Claims by Event	Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 16 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	High above 85% of the US · above 89% of Colorado
Wildfire Likelihood	1% annual chance
Exposure	Direct burnable vegetation

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 431 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Ayva Networks Fixed Wireless	2,500 / 2,500
CenturyLink Fiber	2,000 / 1,000
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20
LiveWireNet Fixed Wireless	250 / 100

May also be available: T-Mobile.

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