Boulder County property record for 431 4th Ave, Lyons, CO 80540 · Last verified June 2026
| Property Type | Industrial > Warehouse, Storage |
|---|---|
| Year Built | Built 1970 |
| Square Footage | 1,536 sqft Gross Area |
| Lot Size | 16,676 sqft (0.383 acres) |
| Last Sale | $230,000 (2003) |
| Tax Bill | $10,770.00 (2025) |
| Primary APN | 1203-18-4-16-011 |
|---|---|
| Alternative APNs |
|
| Building Area | 1,536 sqft Gross Area |
|---|---|
| 1st Floor | 1,536 sqft 1st Floor |
| Stories | 1 Stories |
| Year Built | Built 1970 |
|---|---|
| Effective Year Built | Effective 1970 |
| Construction Type | Steel Frame Construction |
| Lot Area | 16,676 sqft (0.383 acres) |
| Total Buildings | 2 Total Buildings |
| Heating Fuel | Electric Heating Fuel |
|---|
| Account Number | R0507337 |
|---|---|
| Street Address | 431 4TH AVE |
| City | LYONS |
| State | CO |
| Zip | 80540 |
| Property Usage | Industrial Property Usage |
| Type | Industrial > Warehouse, Storage |
| Legal Description | LOTS 1-3 BLK 32 LYONS LESS SLY 26.5 FT M/L FOR ROW |
| Legal Range | 70 |
| Legal Township | 3N |
| Legal Section | 18 |
| Legal Subdivision | LYONS - LY |
| Legal Block | 32 |
| Legal Lot Number | 1 |
| Jurisdiction | BOULDER CO |
| Minor Civil Division | LONGMONT |
| Census Blockgroup | 3 |
| Census Block | 3018 |
| Census Tract | 13601 |
Source: Boulder County records · APN 1203-18-4-16-011
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 | Individual Owner on File |
|---|---|
| Mailing Address | PO BOX 1155, LYONS, CO 80540-1155 |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Vesting | Joint Tenants |
| Deed Names | Verified Name on Deed |
|---|---|
| Known Transactions |
|
| Deed Doc Number | 20032434871 |
| Last Transfer Date | Jul 22, 2014 |
| Transfer Doc | 0003392851 |
| Record Refreshed | 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 | $77,500 (-7.41%) Land $67,500 Building $10,000 | $310,000 (-) Land $270,000 Building $40,000 | |
| 2025 | $10,770.00 (+1.56%) | $83,700 (-15.25%) Land $72,900 Building $10,800 | $310,000 (-12.43%) Land $270,000 Building $40,000 |
| 2023 | $10,605.00 (+46.11%) | $98,766 (+67.77%) Land $84,816 Building $13,950 | $354,000 (+74.38%) Land $304,000 Building $50,000 |
| 2022 | $7,258.00 | $58,870 Land $49,300 Building $9,570 | $203,000 Land $170,000 Building $33,000 |
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