443 Seward St, Lyons, CO 80540 Property Records

Boulder County property record for 443 Seward St, Lyons, CO 80540 · Last verified June 2026

Property Summary

Property Type	Single Family Home
Details	3 bd · 1 ba · 976 sqft · built 1903
Lot Size	0.133 acres (5,781 sqft)
Owner	Individual Name on File
Last Sale	$600,000 (Aug 2025)
Tax Bill	$2,704 (2025)
Deeds & Mortgages	Jun 2023 Reverse Mortgage
Flood Zone	Zone X (minimal risk)
APN	`1203-18-1-08-008`

Property Details

APN / Parcel Number

Primary APN	`1203-18-1-08-008`
Alternative APNs	`R0050255` `0050255`

Interior

Bedrooms	3 Beds
Full Baths	1 Bath
Total Rooms	6 Rooms
Building Area	976 sqft Living Area
Gross Area	1,096 sqft
1st Floor Area	688 sqft
Upper Floors Area	288 sqft

Exterior

Year Built	Built 1903
Effective Year Built	Effective 1961
Architectural Style	A-Frame
Exterior Material	Wood Shingle
Construction Type	Frame
Roof Material	Asphalt
Lot Area	5,781 sqft (0.133 acres)
Garage Area	240 sqft
Parking Spaces	1 Parking Space

Exterior Amenities

Porch	Enclosed Porch
Porch Area	120 sqft
Deck Area	140 sqft
Patio Area	200 sqft

Utilities, Heating & Cooling

Heating System	Gravity Furnace

Location & Zoning

Account Number	R0050255
Street Address	443 SEWARD ST
City	LYONS
State	CO
Zip	80540
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 12 LESS S 62 FT BLK 1 NORTONVILLE
Legal Subdivision	NORTONVILLE - LY
Legal Block	1
Legal Lot Number	12
Jurisdiction	BOULDER CO
Township / Civil Division	LONGMONT
Census Block Group	3
Census Block	3001
Census Tract	13601

Owner

Source: Boulder County records · APN 1203-18-1-08-008

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	443 SEWARD ST, LYONS, CO 80540
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	Aug 20, 2025 · Amount on Record
Deed Sale	Aug 20, 2025 · Amount on Record
Prior Sale	Jun 23, 2025 · Amount on Record
Deed Document Number	20254099351
Prior Transfer Date	Jun 07, 2023
Prior Transfer Doc	0004011074
Record Updated	Sep 20, 2026

June 2023: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	BOULDER CO
Recording Date	Jun 15, 2023
Property Address	443 SEWARD ST, LYONS, CO 80540
Document Number	0004011074
Map Reference	MB 2 PG 63
Instrument Date	Jun 07, 2023
Instrument	4011074
Transaction Type	Transfer
Record Updated	Jul 12, 2023

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
Address	443 SEWARD ST, LYONS, CO 80540

Mortgage

Document Number	0004011075
Date	Jun 15, 2023
Instrument	4011075

Lender

Name	LONGBRIDGE FINANCIAL LLC
Type	Reverse Mortgage Lender

Agreement

Type	Reverse Mortgage
Amount	Amount Recorded

Interest

Rate Type	Adjustable Rate
Rate	7.68%
Adjustable	Adjustable Rate Rider
Type Change Date	Aug 01, 2023
Change Frequency	Monthly
Index	1-Year CMT
Max Rate	12.6%

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		$28,424 (+8.8%) Land $4,005 Building $24,419	$418,000 (-) Land $58,900 Building $359,100
2025	$2,704.00 (+8.46%)	$26,125 (-17.43%) Land $3,681 Building $22,444	$418,000 (-11.48%) Land $58,900 Building $359,100
2023	$2,493.00 (+24.53%)	$31,638 (+36.41%) Land $3,424 Building $28,214	$472,200 (+41.5%) Land $51,100 Building $421,100
2022	$2,002.00	$23,193 Land $3,128 Building $20,065	$333,700 Land $45,000 Building $288,700

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
Flood Hazard	Minimal
500-Year Floodplain	No
Special Flood Hazard Area	No
Nearest Special Flood Hazard Area	Zone AE, within 500 ft

Wildfire

Wildfire Risk	High above 75% of the US · above 74% of Colorado
Wildfire Likelihood	About 1 in 316 per year
Exposure	Indirect within ember reach

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

Historic Designation

Source: NPS National Register of Historic Places · August 1, 2026 release · Last verified October 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.