664 Riverside Dr, Lyons, CO 80540 Property Records

Boulder County property record for 664 Riverside Dr, Lyons, CO 80540 · Last verified July 2026

Property Highlights

Property Type	Residential > Single Family > Home
Bedrooms	2 Beds
Bathrooms	1 Baths
Year Built	Built 1985
Square Footage	1,092 sqft Living Area
Lot Size	15,429 sqft (0.354 acres)
Occupancy	Owner Occupied
Last Sale	$450,000 (2026)
Tax Bill	$2,474.00 (2025)

Owner

Source: Boulder County records · APN 1199-34-3-05-008

Assessment roll updated June 15, 2026 · Last verified July 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	664 RIVERSIDE DR, LYONS, CO 80540-8900
Occupancy	Owner Occupied
Owner Type	Owner is an Individual, Couple or Unincorporated Entity

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Jan 26, 2026 · Amount on Record
Deed Sale	Jan 26, 2026 · Amount on Record
Prior Sale	Dec 19, 2008 · Amount on Record
Deed Doc Number	20264117657
Record Refreshed	Sep 20, 2026

January 2026: Special Warranty Deed, Transfer

Document Type	Special Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Jan 26, 2026
Property Address	664 RIVERSIDE DR, LYONS, CO 80540-8900
Document Number	0004117657
Instrument Date	Jan 23, 2026
Instrument	4117657
Transaction Type	Transfer
Record Updated	Feb 06, 2026
Title Company	FIRST AMERICAN TITLE

Transaction

Amount	Amount Recorded
Tax	$45.00
Amount Accuracy	Full Amount Stated
Additional	Arms Length Transaction

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	664 RIVERSIDE DR, LYONS, CO 80540-8900

Tax Assessment & Valuation

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

Property Jurisdictions

Type	Name
State	Colorado
County	Boulder County
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		$27,431 (+8.8%) Land $2,951 Building $24,480	$403,400 (-) Land $43,400 Building $360,000
2025	$2,474.00 (+13.9%)	$25,213 (-11.58%) Land $2,713 Building $22,500	$403,400 (-5.22%) Land $43,400 Building $360,000
2023	$2,172.00 (+1.16%)	$28,515 (+22.25%) Land $2,506 Building $26,009	$425,600 (+26.82%) Land $37,400 Building $388,200
2022	$2,147.00	$23,325 Land $2,572 Building $20,753	$335,600 Land $37,000 Building $298,600

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 AE
Flood Hazard	High
100-Year Floodplain	Yes 1% annual chance
Special Flood Hazard Area	Yes
Flood Insurance Requirement	Required (federally backed mortgages)
Floodway	Yes
Base Flood Elevation	Varies along the reach; see FIRM

Wildfire

Wildfire Risk	Extreme above 98% of the US · above 100% of Colorado
Wildfire Likelihood	About 1 in 58 per year
Exposure	Direct burnable vegetation at the parcel

Insurers in high-risk areas may require mitigation or decline coverage; check availability before making an offer.

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

Property Details

APN / Parcel Number

Primary APN	`1199-34-3-05-008`
Alternative APNs	`R0053914` `0053914`

Interior

Bedrooms	2 Beds
Full Baths	1 Baths
Total Rooms	5 Rooms
Building Area	1,092 sqft Living Area
1st Floor	1,092 sqft 1st Floor
Basement Area	1,092 sqft Basement
Interior Structure	Wallboard/Drywall Interior Structure

Exterior

Year Built	Built 1981
Effective Year Built	Effective 1985
Architectural Style	Modular Style
Exterior Material	Wood Shingle Exterior
Construction Type	Frame Construction
Roof Material	Asphalt Roof
Lot Area	15,429 sqft (0.354 acres)
Deck Area	100 sqft Deck

Utilities and HVAC

Heating System	Forced Air with Air Conditioning Heating

Location & Zoning

Account Number	R0053914
Street Address	664 RIVERSIDE DR
City	LYONS
State	CO
Zip	80540-8900
Property Usage	Residential Property Usage
Type	Residential > Single Family > Home
Legal Description	LOT 8 & 9 BLK 1 & TR 3980 RIVERSIDE ALPINE AKA 1935 AMENDED ALPINE ADDITION TO RIVERSIDE ID 77883 COMB HERE PER OWNER
Legal Range	72
Legal Township	3N
Legal Section	34
Legal Subdivision	RIVERSIDE ALPINE - MT
Legal Tract	3980
Legal Block	1
Legal Lot Number	9
Jurisdiction	BOULDER CO
Minor Civil Division	UPPER ST. VRAIN
Census Blockgroup	1
Census Block	1046
Census Tract	13602