436 Prospect St, Lyons, CO 80540 Property Records

Boulder County property record for 436 Prospect St, Lyons, CO 80540 · Last verified June 2026

Property Highlights

Property Type	Residential > Single Family > Home
Bedrooms	2 Beds
Bathrooms	1 Baths
Architecture Style	Ranch
Year Built	Built 1996
Square Footage	2,216 sqft Living Area
Lot Size	13,852 sqft (0.318 acres)
Garage	Carport, 312 sqft
Tax Bill	$4,816.00 (2025)

Property Details

APN / Parcel Number

Primary APN	`1203-18-4-25-008`
Alternative APNs	`R0050136` `0050136`

Interior

Bedrooms	2 Beds
Full Baths	1 Baths
Total Rooms	5 Rooms
Building Area	2,216 sqft Living Area
1st Floor	1,176 sqft 1st Floor
Basement Area	1,040 sqft Basement
Finished Basement	1,040 sqft Finished
Stories	1 Stories
Interior Structure	Wallboard/Drywall Interior Structure

Exterior

Year Built	Built 1965
Effective Year Built	Effective 1996
Architectural Style	Ranch Style
Exterior Material	Wood Shingle Exterior
Construction Type	Frame Construction
Lot Area	13,852 sqft (0.318 acres)
Parking Spaces	1 Parking Spaces
Garage Type	Carport Garage
Garage Area	312 sqft Garage
Carport	Carport
Carport Area	312 sqft Carport
Porch	Porch
Porch Area	92 sqft Porch

Utilities and HVAC

Heating System	Hot Water Heating

Location & Zoning

Account Number	R0050136
Street Address	436 PROSPECT ST
City	LYONS
State	CO
Zip	80540
Property Usage	Residential Property Usage
Type	Residential > Single Family > Home
Legal Description	LOTS 11-12 BLK 34 LYONS
Legal Range	70
Legal Township	3N
Legal Section	18
Legal Subdivision	LYONS - LY
Legal Block	34
Legal Lot Number	11
Jurisdiction	BOULDER CO
Minor Civil Division	LONGMONT
Census Blockgroup	3
Census Block	3025
Census Tract	13601

Owner

Source: Boulder County records · APN 1203-18-4-25-008

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	33840 S GARCIA ST, 65, PORT ISABEL, TX 78578-4314
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	Aug 09, 1957
Deed Sale	Aug 09, 1957
Deed Doc Number	1957598189
Last Transfer Date	Jun 02, 2010
Transfer Doc	0003080108
Record Refreshed	Sep 20, 2026

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 and are not market price estimates.

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$48,287 (+36.4%) Land $6,202 Building $42,085	$710,100 (+25.37%) Land $91,200 Building $618,900
2025	$4,816.00 (+15.3%)	$35,400 (-9.9%) Land $5,700 Building $29,700	$566,400 (-3.41%) Land $91,200 Building $475,200
2023	$4,177.00 (+12.56%)	$39,289 (+30.5%) Land $5,293 Building $33,996	$586,400 (+35.36%) Land $79,000 Building $507,400
2022	$3,711.00	$30,107 Land $4,844 Building $25,263	$433,200 Land $69,700 Building $363,500

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

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	No
Base Flood Elevation	Varies along the reach; see FIRM

Wildfire

Wildfire Risk	High 79th percentile nationally · 81st in Colorado
Wildfire Likelihood	About 1 in 224 per year
Exposure	Indirect within ember reach

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