434 Seward St, Lyons, CO 80540 Property Records

Boulder County property record for 434 Seward St, Lyons, CO 80540

Property Summary

Property Type	Single Family Home
Details	3 bd · 1.5 ba · 1,308 sqft · built 1903
Lot Size	0.237 acres (10,338 sqft)
Owner	Company Name on Record
Last Sale	$288,000 (Mar 2004)
Tax Bill	$6,816 (2025)
Deeds & Mortgages	Mar 2021 Mortgage Jul 2020 Transfer + 1 more
Flood Zone	Zone X (minimal risk)
APN	`1203-18-1-07-007`

Property Details

APN / Parcel Number

Primary APN	`1203-18-1-07-007`
Alternative APNs	`R0050217` `0050217`

Interior

Bedrooms	3 Beds
Full Baths	1.5 Baths
Half Baths	1 Half Bath
Total Rooms	7 Rooms
Stories	1 Story
Building Area	1,308 sqft Living Area
1st Floor Area	1,308 sqft
Interior Walls	Plaster

Exterior

Year Built	Built 1903
Effective Year Built	Effective 2000
Architectural Style	Ranch
Exterior Material	Combination
Construction Type	Masonry / Concrete Block
Roof Material	Asphalt
Lot Area	10,338 sqft (0.237 acres)
Garage Type	Detached
Garage Area	820 sqft
Total Buildings	2 Buildings

Utilities, Heating & Cooling

Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0050217
Street Address	434 SEWARD ST
City	LYONS
State	CO
Zip	80540
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 2 BLK 4 NORTONVILLE
Legal Range	70
Legal Township	3N
Legal Section	18
Legal Subdivision	NORTONVILLE - LY
Legal Block	4
Legal Lot Number	2
Jurisdiction	BOULDER CO
Township / Civil Division	LONGMONT
Census Block Group	3
Census Block	3002
Census Tract	13601

Historic Designation

Source: NPS National Register of Historic Places, as of August 1, 2026

Historic District	Within the Lyons Sandstone Buildings listed 1980 · 13 contributing resources · NRIS 80000880

Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.

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	Company Name on Record
Mailing Address	434 SEWARD ST, LYONS, CO 80540
Owner Type	Company
Vesting	Life Tenant

Deeds, Mortgages & Sale History

Date	Document
Mar 1, 2021	Quit Claim Deed, Transfer · Conventional Mortgage OCMBC INC
Jul 13, 2020	Quit Claim Deed, Transfer NOT AVAILABLE
Aug 2, 2019	Quit Claim Deed, Transfer NOT AVAILABLE

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Mar 19, 2004 · Amount on Record
Deed Sale	Mar 19, 2004 · Amount on Record
Prior Sale	Apr 1, 1997 · Amount on Record
Deed Document Number	20042567711
Last Transfer Date	Feb 17, 2021
Transfer Doc	0003863158
Record Updated	Oct 29, 2026

March 2021: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	BOULDER CO
Recording Date	Mar 1, 2021
Property Address	434 SEWARD ST, LYONS, CO 80540
Document Number	0003863158
Instrument Date	Feb 17, 2021
Instrument	3863158
Transaction Type	Transfer
Record Updated	Mar 31, 2022

Transaction

Tax	$0.00
Amount Accuracy	No Consideration Stated
Additional	Quitclaim

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	434 SEWARD ST, LYONS, CO 80540

Mortgage

Document Number	0003863160
Date	Mar 1, 2021
Instrument	3863160

Lender

Name	OCMBC INC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	180 Months
Due	Mar 1, 2036

July 2020: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	BOULDER CO
Recording Date	Jul 13, 2020
Property Address	434 SEWARD ST, LYONS, CO 80540
Document Number	0003797558
Instrument Date	Jul 5, 2020
Instrument	3797558
Transaction Type	Transfer
Record Updated	Aug 21, 2020
Title Company	NOT AVAILABLE

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	434 SEWARD ST LYONS CO 80540, LYONS, CO 80540

August 2019: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	BOULDER CO
Recording Date	Aug 2, 2019
Property Address	434 SEWARD ST, LYONS, CO 80540
Document Number	0003728041
Instrument Date	Jul 3, 2019
Instrument	3728041
Transaction Type	Transfer
Record Updated	Aug 14, 2019
Title Company	NOT AVAILABLE

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	434 SEWARD ST LYONS CO 80540, LYONS, CO 80540

Tax Assessment & Valuation

Source: Boulder County assessment roll, as of September 18, 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

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$49,742 (-0.7%) Land $612 Building $49,130	$801,500 (-) Land $79,000 Building $722,500
2025	$6,816.00 (+3.54%)	$50,094 (-16.24%) Land $4,938 Building $45,156	$801,500 (-10.21%) Land $79,000 Building $722,500
2023	$6,583.00 (+28.32%)	$59,804 (+43.7%) Land $4,583 Building $55,221	$892,600 (+49.06%) Land $68,400 Building $824,200
2022	$5,130.00	$41,617 Land $4,198 Building $37,419	$598,800 Land $60,400 Building $538,400

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 38 policies
Nearby Flood Policies	38 in force
Nearby Flood Claims	62 (1978–2013)
Claims Outside the SFHA	4 of 62
Most Recent Claim	Dec 2013 · other causes
Claims by Event	Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 47 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 84% of the US · above 87% of Colorado
Wildfire Likelihood	0.7% 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	TOWN OF LYONS serves 2,990 people · EPA ID CO0107496
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, 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 177 locations within half a mile, as of December 31, 2025

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

May also be available: Rise Broadband.

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