637 1st Ave, Lyons, CO 80540 Property Records

Boulder County property record for 637 1st Ave, Lyons, CO 80540

Property Summary

Property Type	Single Family Home
Details	4 bd · 4.5 ba · 2,938 sqft · built 2002
Lot Size	0.171 acres (7,425 sqft)
Owner	2 Individual Names on File
Last Sale	$752,000 (Oct 2019)
Tax Bill	$9,497 (2025)
Deeds & Mortgages	Oct 2019 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`1203-18-4-53-007`

Property Details

APN / Parcel Number

Primary APN	`1203-18-4-53-007`
Alternative APNs	`R0503381` `0503381`

Interior

Bedrooms	4 Beds
Full Baths	4.5 Baths
Half Baths	1 Half Bath
Total Rooms	10 Rooms
Stories	2 Stories
Building Area	2,938 sqft Living Area
Gross Area	3,698 sqft
1st Floor Area	1,329 sqft
Upper Floors Area	740 sqft
Basement Area	869 sqft
Finished Basement	869 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 2002
Effective Year Built	Effective 2010
Architectural Style	A-Frame
Exterior Material	Combination
Construction Type	Frame
Roof Material	Asphalt
Lot Area	7,425 sqft (0.171 acres)
Garage Type	Attached
Garage Area	760 sqft
Parking Spaces	3 Parking Spaces
Deck Area	132 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0503381
Street Address	637 1ST AVE
City	LYONS
State	CO
Zip	80540-5076
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 7 BLK 2 LYONS TURNER & REED
Legal Range	70
Legal Township	3N
Legal Section	18
Legal Subdivision	TURNER & REED - LY
Legal Block	2
Legal Lot Number	7
Jurisdiction	BOULDER CO
Township / Civil Division	LONGMONT
Census Block Group	2
Census Block	2031
Census Tract	13601

Owner

Source: Boulder County records · APN 1203-18-4-53-007

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	2 Individual Names on File
Mailing Address	1718 N 900TH RD, BALDWIN CITY, KS 66006-7335
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Oct 15, 2019 · Amount on Record
Deed Sale	Oct 15, 2019 · Amount on Record
Prior Sale	Jun 12, 2015 · Amount on Record
Deed Document Number	20193742449
Record Updated	Sep 20, 2026

October 2019: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Oct 15, 2019
Property Address	637 1ST AVE, LYONS, CO 80540-5076
Document Number	0003742449
Map Reference	DOC 184548
Instrument Date	Oct 01, 2019
Instrument	3742449
Transaction Type	Transfer
Record Updated	Mar 31, 2022
Title Company	CANYON TITLE

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on File
Loan-to-Value (LTV)	LTV on Record
Tax	$75.20
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	1718 N 900TH RD, BALDWIN CITY, KS 66006-7335

Mortgage

Document Number	0003742450
Date	Oct 15, 2019
Instrument	3742450

Lender

Name	GUILD MORTGAGE CO
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Oct 01, 2049

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, not market price estimates; both are a fraction of this property's market value.

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$75,943 (+8.8%) Land $4,638 Building $71,305	$1,116,800 (-) Land $68,200 Building $1,048,600
2025	$9,497.00 (+11%)	$69,801 (-8.9%) Land $4,263 Building $65,538	$1,116,800 (-2.34%) Land $68,200 Building $1,048,600
2023	$8,556.00 (+22.33%)	$76,621 (+35.06%) Land $3,973 Building $72,648	$1,143,600 (+40.1%) Land $59,300 Building $1,084,300
2022	$6,994.00	$56,733 Land $3,579 Building $53,154	$816,300 Land $51,500 Building $764,800

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 minimal risk
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 73% of the US · above 70% 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.