Boulder County property record for 443 Prospect St, Lyons, CO 80540 · Last verified June 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 1 Beds |
| Bathrooms | 1.75 Baths |
| Architecture Style | Ranch |
| Year Built | Built 1985 |
| Square Footage | 1,256 sqft Living Area |
| Lot Size | 13,543 sqft (0.311 acres) |
| Tax Bill | $3,477.00 (2025) |
| Primary APN | 1203-18-4-33-006 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 1 Beds |
|---|---|
| Full Baths | 1.75 Baths |
| Partial Baths | 1 Partial Baths |
| Total Rooms | 4 Rooms |
| Building Area | 1,256 sqft Living Area |
| 1st Floor | 1,256 sqft 1st Floor |
| Stories | 1 Stories |
| Interior Structure | Plywood Interior Structure |
| Year Built | Built 1972 |
|---|---|
| Effective Year Built | Effective 1985 |
| Architectural Style | Ranch Style |
| Exterior Material | Wood Shingle Exterior |
| Construction Type | Frame Construction |
| Roof Material | Other (not Classified) Roof |
| Lot Area | 13,543 sqft (0.311 acres) |
| Total Buildings | 2 Total Buildings |
| Shed | 1 Shed |
| Heating System | Floor/Wall Furnace Heating |
|---|
| Account Number | R0050085 |
|---|---|
| Street Address | 443 PROSPECT ST |
| City | LYONS |
| State | CO |
| Zip | 80540-5068 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | LOTS 7-8 BLK 35 LYONS |
| Legal Range | 70 |
| Legal Township | 3N |
| Legal Section | 18 |
| Legal Subdivision | LYONS - LY |
| Legal Block | 35 |
| Legal Lot Number | 7 |
| Jurisdiction | BOULDER CO |
| Minor Civil Division | LONGMONT |
| Census Blockgroup | 3 |
| Census Block | 3027 |
| Census Tract | 13601 |
Source: Boulder County records · APN 1203-18-4-33-006
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 | PO BOX 1291, LYONS, CO 80540-1291 |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Apr 10, 1992 |
| Deed Sale | Apr 10, 1992 |
| Prior Sale | May 06, 1987 · Amount on Record |
| Deed Doc Number | 19921175181 |
| Last Transfer Date | Aug 13, 1998 |
| Transfer Doc | 0001834997 |
| 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 and are not market price estimates.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $34,606 (+8.8%) Land $5,719 Building $28,887 | $508,903 (-) Land $84,100 Building $424,803 | |
| 2025 | $3,477.00 (+15.75%) | $31,806 (-11.64%) Land $5,256 Building $26,550 | $508,903 (-5.27%) Land $84,100 Building $424,803 |
| 2023 | $3,004.00 (+18.74%) | $35,994 (+31%) Land $5,012 Building $30,982 | $537,219 (+35.88%) Land $74,800 Building $462,419 |
| 2022 | $2,530.00 | $27,477 Land $4,622 Building $22,855 | $395,350 Land $66,500 Building $328,850 |
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