Boulder County property record for 420 Park St, Lyons, CO 80540 · Last verified June 2026
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 2 ba · 1,263 sqft · built 1903 |
| Lot Size | 0.156 acres (6,804 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $82,400 (Dec 1992) |
| Tax Bill | $4,745 (2025) |
| Flood Zone | Zone AE (high risk) |
| APN | 1203-18-4-23-011 |
| Primary APN | 1203-18-4-23-011 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 1,263 sqft Living Area |
| 1st Floor Area | 1,263 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1903 |
|---|---|
| Effective Year Built | Effective 1985 |
| Architectural Style | Ranch |
| Exterior Material | Combination |
| Construction Type | Frame |
| Roof Material | Asphalt |
| Lot Area | 6,804 sqft (0.156 acres) |
| Deck Area | 104 sqft |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0050135 |
|---|---|
| Street Address | 420 PARK ST |
| City | LYONS |
| State | CO |
| Zip | 80540 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 13 BLK 33 LYONS |
| Legal Range | 70 |
| Legal Township | 3N |
| Legal Section | 18 |
| Legal Subdivision | LYONS - LY |
| Legal Block | 33 |
| Legal Lot Number | 13 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | LONGMONT |
| Census Block Group | 3 |
| Census Block | 3026 |
| Census Tract | 13601 |
Source: Boulder County records · APN 1203-18-4-23-011
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 | 2 Individual Names on File |
|---|---|
| Mailing Address | PO BOX 1665, LYONS, CO 80540-1665 |
| Owner Type | Individual |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Dec 23, 1992 · Amount on Record |
| Deed Sale | Dec 23, 1992 · Amount on Record |
| Prior Sale | Sep 11, 1984 · Amount on Record |
| Deed Document Number | 19921251429 |
| Last Transfer Date | Sep 09, 1998 |
| Transfer Doc | 0001850965 |
| Record Updated | Sep 20, 2026 |
Source: Boulder County records · Assessment roll updated June 15, 2026 · Last verified June 2026
| Type | Name |
|---|---|
| State | Colorado |
| County | Boulder County |
| Municipality | Lyons Town |
| Unified School District | St. Vrain Valley School District RE 1J (PK - 12) |
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 | $44,744 (+8.8%) Land $4,386 Building $40,358 | $658,000 (-) Land $64,500 Building $593,500 | |
| 2025 | $4,745.00 (+12.98%) | $41,125 (-10.97%) Land $4,031 Building $37,094 | $658,000 (-4.55%) Land $64,500 Building $593,500 |
| 2023 | $4,200.00 (+26.7%) | $46,190 (+36.5%) Land $3,745 Building $42,445 | $689,400 (+41.59%) Land $55,900 Building $633,500 |
| 2022 | $3,315.00 | $33,839 Land $3,426 Building $30,413 | $486,900 Land $49,300 Building $437,600 |
Source: FEMA National Flood Hazard Layer, Boulder County (08013C), updated October 14, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 080130136013, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone AE |
|---|---|
| Special Flood Hazard Area | Yes |
| Flood Hazard | High |
| 100-Year Floodplain | Yes 1% annual chance |
| Floodway | No |
| Base Flood Elevation | Varies along the reach; see FIRM |
| Flood Insurance Requirement | Required (federally backed mortgages) |
| Flood Insurance Cost | Premium on Record median of 38 individual NFIP policies nearby |
| Nearby Flood Policies | 38 in force 30 of 38 on primary residences |
| Nearby Flood Claims | 62 (1978–2013) |
| Claims Outside the SFHA | 4 of 62 |
| Most Recent Claim | Dec 2013, other causes |
| Flood Events |
|
| Wildfire Risk | High above 76% of the US · above 75% of Colorado |
|---|---|
| Wildfire Likelihood | About 1 in 291 per year |
| Exposure | Indirect within ember reach |
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.
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.
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