603 E 4th Ave, Longmont, CO 80504 Property Records

Boulder County property record for 603 E 4th Ave, Longmont, CO 80504 · Last verified June 2026

Property Summary

Property Type	Single Family Home
Details	3 bd · 1 ba · 1,075 sqft · built 1972
Lot Size	0.178 acres (7,758 sqft)
Owner	Individual Name on File
Last Sale	$137,300 (Mar 2011)
Tax Bill	$1,928 (2025)
Flood Zone	Zone X (minimal risk)
APN	`1315-02-4-13-003`

Property Details

APN / Parcel Number

Primary APN	`1315-02-4-13-003`
Alternative APNs	`R0040451` `0040451`

Interior

Bedrooms	3 Beds
Full Baths	1 Bath
Total Rooms	7 Rooms
Stories	1 Story
Building Area	1,075 sqft Living Area
Gross Area	1,375 sqft
1st Floor Area	1,075 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1972
Effective Year Built	Effective 1985
Architectural Style	Ranch
Exterior Material	Brick Veneer
Construction Type	Brick
Roof Material	Asphalt
Lot Area	7,758 sqft (0.178 acres)
Garage Type	Attached
Garage Area	300 sqft
Parking Spaces	1 Parking Space
Patio Area	180 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0040451
Street Address	603 E 4TH AVE
City	LONGMONT
State	CO
Zip	80504-6008
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 227 DOLLHOUSE VILLAGE 2
Legal Range	69
Legal Township	2N
Legal Section	02
Legal Subdivision	DOLLHOUSE VILLAGE 2 - LG
Legal Block	1
Legal Lot Number	227
Jurisdiction	BOULDER CO
Township / Civil Division	LONGMONT
Census Block Group	1
Census Block	1010
Census Tract	13402

Owner

Source: Boulder County records · APN 1315-02-4-13-003

Assessment roll updated June 15, 2026 · Last verified June 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 File
Mailing Address	603 E 4TH AVE, LONGMONT, CO 80504-6008
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	Mar 07, 2011 · Amount on Record
Deed Sale	Mar 07, 2011 · Amount on Record
Prior Sale	Nov 05, 2010 · Amount on Record
Deed Document Number	20113136752
Record Updated	Sep 20, 2026

Tax Assessment & Valuation

Source: Boulder County records · Assessment roll updated June 15, 2026 · Last verified June 2026

Property Jurisdictions

Type	Name
State	Colorado
County	Boulder County
Municipality	Longmont City
Unified School District	St. Vrain Valley School District RE 1J (PK - 12)

Tax Bill & Assessment History

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.

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$26,792 (+8.8%) Land $11,254 Building $15,538	$394,000 (-) Land $165,500 Building $228,500
2025	$1,928.00 (-10.78%)	$24,625 (-7.42%) Land $10,344 Building $14,281	$394,000 (-0.76%) Land $165,500 Building $228,500
2023	$2,161.00 (+8.43%)	$26,599 (+32.06%) Land $11,430 Building $15,169	$397,000 (+36.99%) Land $170,600 Building $226,400
2022	$1,993.00	$20,141 Land $8,069 Building $12,072	$289,800 Land $116,100 Building $173,700

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Boulder County (08013C), updated October 14, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X
Special Flood Hazard Area	No
Flood Hazard	Minimal
500-Year Floodplain	No

Wildfire

Wildfire Risk	Not rated no burnable land in reach
Wildfire Likelihood	Negligible
Exposure	None beyond ember reach

Values are read at the parcel center point; lenders make the official flood determination.

Internet Providers

Source: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 696 locations within about half a mile of this property

Provider	Technology	Download / Upload (Mbps)
City of Longmont	Fiber	10,000 / 10,000
Xfinity	Cable	1,200 / 35
Verizon	Fixed Wireless	300 / 20
Lumen Technologies	DSL	140 / 20

May also be available at this address: JAB Wireless, TDS Telecom. Availability varies by address; speeds are provider-advertised maximums, not measured.