431 5th Ave, #1A, Lyons, CO 80540 Property Records

Boulder County property record for 431 5th Ave, #1A, Lyons, CO 80540

Property Summary

Property Type	Condominium
Details	2 bd · 2.5 ba · 1,344 sqft · built 2007
Lot Size	1.09 acres (47,712 sqft)
Owner	Company Name on File
Tax Bill	$5,886 (2025)
Flood Zone	Zone X (moderate risk)
APN	`1203-18-4-68-001`

Property Details

APN / Parcel Number

Primary APN	`1203-18-4-68-001`
Alternative APN	`R0516046`

Interior

Bedrooms	2 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	5 Rooms
Building Area	1,344 sqft Living Area
Gross Area	1,533 sqft
1st Floor Area	589 sqft
Upper Floors Area	755 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 2007
Effective Year Built	Effective 2007
Architectural Style	Condo/Apartment
Exterior Material	Wood Shingle
Construction Type	Frame
Roof Material	Asphalt
Lot Area	47,712 sqft
Garage Type	Attached
Garage Area	189 sqft
Porch	Porch
Porch Area	229 sqft

Utilities, Heating & Cooling

Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0516046
Street Address	431 5TH AVE, 1A
City	LYONS
State	CO
Zip	80540-8835
Property Category	Residential
Property Type	Residential > Condominium / Townhouse > Condominium
Legal Description	UNIT 1 BLDG A RIVER CLIFF COTTAGES CONDOMINIUMS
Legal Range	70
Legal Township	3N
Legal Section	18
Legal Subdivision	RIVER CLIFF COTTAGES CONDOMINIUMS
Legal Block	2
Legal Unit	1
Jurisdiction	BOULDER CO
Township / Civil Division	LONGMONT
Census Block Group	2
Census Block	2037
Census Tract	13601

Owner

Source: Boulder County records · APN 1203-18-4-68-001

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	Company Name on File
Mailing Address	3663 4TH ST, BOULDER, CO 80304-1705
Owner Type	Company
Vesting	Company

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
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	Lyons Town
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 and are not market price estimates.

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$47,070 (+8.8%) Building $47,070	$692,200 (-) Building $692,200
2025	$5,886.00 (+11.52%)	$43,263 (-11.13%) Building $43,263	$692,200 (-4.73%) Building $692,200
2023	$5,278.00 (+26.6%)	$48,681 (+43.95%) Building $48,681	$726,583 (+49.32%) Building $726,583
2022	$4,169.00	$33,819 Building $33,819	$486,600 Building $486,600

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of October 14, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026

Flood

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 22 policies
Community Rating System	Class 5 (25% premium discount)
Nearby Flood Policies	22 in force
Nearby Flood Claims	56 (1980–2015)
Claims Outside the SFHA	23 of 56
Most Recent Claim	Jun 2015 · Severe Storms, Tornadoes, Flooding, Landslides, And Mudslides
Claims by Event	Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 49 claims

Wildfire

Wildfire Risk	High above 75% of the US · above 74% of Colorado
Wildfire Likelihood	0.3% annual chance
Exposure	Indirect within ember reach

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.

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

Provider	Max Down / Up (Mbps)
Z3N Fiber · Cable · Fixed Wireless	1,000 / 1,000
Verizon Fixed Wireless	300 / 20
T-Mobile USA Fixed Wireless	100 / 20
AT&T Fixed Wireless	100 / 20
JAB Wireless Fixed Wireless	100 / 20

Based on FCC filings for 275 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	TOWN OF LYONS serves 2,990 people
Water Source	Purchased surface water from CITY OF LONGMONT
Last State Inspection	Nov 2022
Lead	Under 1 ppb (2023–2025) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	None last 3 years

Results are for the whole water system as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.