509 Riverside Dr, Lyons, CO 80540 Property Records

Boulder County property record for 509 Riverside Dr, Lyons, CO 80540 · Last verified July 2026

Property Highlights

Property Type	Residential > Single Family > Home
Bedrooms	1 Beds
Architecture Style	Ranch
Year Built	Built 1940
Square Footage	400 sqft Living Area
Lot Size	26,062 sqft (0.598 acres)
Last Sale	$3,500 (1971)
Tax Bill	$1,042.00 (2025)

Property Details

APN / Parcel Number

Primary APN	`1199-34-4-00-010`
Alternative APNs	`R0053589` `0053589`

Interior

Bedrooms	1 Beds
Total Rooms	2 Rooms
Building Area	400 sqft Living Area
1st Floor	400 sqft 1st Floor
Stories	1 Stories
Interior Structure	Wallboard/Drywall Interior Structure

Exterior

Year Built	Built 1915
Effective Year Built	Effective 1940
Architectural Style	Ranch Style
Exterior Material	Wood Shingle Exterior
Construction Type	Frame Construction
Lot Area	26,062 sqft (0.598 acres)

Utilities and HVAC

Heating System	Floor/Wall Furnace Heating

Location & Zoning

Account Number	R0053589
Street Address	509 RIVERSIDE DR
City	LYONS
State	CO
Zip	80540
Property Usage	Residential Property Usage
Type	Residential > Single Family > Home
Legal Description	.7 AC NW 1/4 SE 1/4 34-3N-72
Legal Range	72
Legal Township	3N
Legal Section	34
Legal Subdivision	TR, NBR 961 ST VRAIN AREA
Legal Block	1
Jurisdiction	BOULDER CO
Minor Civil Division	UPPER ST. VRAIN
Census Blockgroup	1
Census Block	1047
Census Tract	13602

Owner

Source: Boulder County records · APN 1199-34-4-00-010

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	Individual Name on File
Mailing Address	31501 HIGHWAY 10, STERLING, ND 58572-9706
Owner Type	Owner is an Individual, Couple or Unincorporated Entity

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	May 24, 1971 · Amount on Record
Deed Sale	May 24, 1971 · Amount on Record
Deed Doc Number	1971976917
Last Transfer Date	Jul 22, 1998
Transfer Doc	0001835660
Record Refreshed	Sep 20, 2026

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 and are not market price estimates.

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$11,560 (+8.8%) Land $2,836 Building $8,724	$170,000 (-) Land $41,700 Building $128,300
2025	$1,042.00 (+29.76%)	$10,625 (-16.58%) Land $2,606 Building $8,019	$170,000 (-10.57%) Land $41,700 Building $128,300
2024	$803.00 (+1.52%)
2023	$791.00 (-7.59%)	$12,737 (+36.96%) Land $2,593 Building $10,144	$190,100 (+42.08%) Land $38,700 Building $151,400
2022	$856.00	$9,300 Land $2,148 Building $7,152	$133,800 Land $30,900 Building $102,900

Flood & Wildfire

509 Riverside Dr is in FEMA Zone X, outside the Special Flood Hazard Area, with direct wildfire exposure (Extreme risk).

Flood

Source: FEMA National Flood Hazard Layer · Boulder County (08013C), updated October 14, 2026

FEMA Flood Zone	Zone X minimal flood hazard · outside the 0.2% annual chance floodplain
Special Flood Hazard Area	No
Nearest Special Flood Hazard Area	Zone AE, within 100 ft

Wildfire

Source: USDA Forest Service Wildfire Risk to Communities · 2nd edition (2024), fuels as of 2020

Wildfire Risk to Homes	Extreme 98th percentile of exposed land nationally · 100th in Colorado
Wildfire Likelihood	Extreme — 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.