Boulder County property record for 440 Prospect St, Lyons, CO 80540 · Last verified June 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 2 Beds |
| Bathrooms | 1 Baths |
| Year Built | Built 1965 |
| Square Footage | 1,548 sqft Living Area |
| Lot Size | 13,813 sqft (0.317 acres) |
| Garage | Carport, 240 sqft |
| Last Sale | $189,900 (1999) |
| Tax Bill | $4,458.00 (2025) |
| Primary APN | 1203-18-4-25-007 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Baths |
| Total Rooms | 4 Rooms |
| Building Area | 1,548 sqft Living Area |
| 1st Floor | 1,548 sqft 1st Floor |
| Stories | 1 Stories |
| Interior Structure | Wallboard/Drywall Interior Structure |
| Year Built | Built 1956 |
|---|---|
| Effective Year Built | Effective 1965 |
| Architectural Style | Ranch Style |
| Exterior Material | Wood Shingle Exterior |
| Construction Type | Frame Construction |
| Lot Area | 13,813 sqft (0.317 acres) |
| Parking Spaces | 1 Parking Spaces |
| Garage Type | Carport Garage |
| Garage Area | 240 sqft Garage |
| Carport | Carport |
| Carport Area | 240 sqft Carport |
| Total Buildings | 2 Total Buildings |
|---|---|
| Shed | 1 Shed |
| Porch | Porch |
| Porch Area | 177 sqft Porch |
| Heating System | Hot Water Heating |
|---|
| Account Number | R0050393 |
|---|---|
| Street Address | 440 PROSPECT ST |
| City | LYONS |
| State | CO |
| Zip | 80540-5068 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | LOTS 9-10 BLK 34 LYONS |
| Legal Range | 70 |
| Legal Township | 3N |
| Legal Section | 18 |
| Legal Subdivision | LYONS - LY |
| Legal Block | 34 |
| Legal Lot Number | 9 |
| Jurisdiction | BOULDER CO |
| Minor Civil Division | LONGMONT |
| Census Blockgroup | 3 |
| Census Block | 3025 |
| Census Tract | 13601 |
Source: Boulder County records · APN 1203-18-4-25-007
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 1182, LYONS, CO 80540-1182 |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Aug 03, 1999 · Amount on Record |
| Deed Sale | Aug 03, 1999 · Amount on Record |
| Prior Sale | Feb 18, 1981 · Amount on Record |
| Deed Doc Number | 19991967692 |
| 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 | $35,653 (+8.8%) Land $5,719 Building $29,934 | $524,300 (-) Land $84,100 Building $440,200 | |
| 2025 | $4,458.00 (+14.02%) | $32,769 (-11.48%) Land $5,256 Building $27,513 | $524,300 (-5.1%) Land $84,100 Building $440,200 |
| 2023 | $3,910.00 (+9.16%) | $37,018 (+27.38%) Land $5,012 Building $32,006 | $552,500 (+32.14%) Land $74,800 Building $477,700 |
| 2022 | $3,582.00 | $29,061 Land $4,622 Building $24,439 | $418,130 Land $66,500 Building $351,630 |
440 Prospect St is in FEMA Zone X, outside the Special Flood Hazard Area, with indirect wildfire exposure (High risk).
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 |
Source: USDA Forest Service Wildfire Risk to Communities · 2nd edition (2024), fuels as of 2020
| Wildfire Risk to Homes | High 79th percentile of exposed land nationally · 81st in Colorado |
|---|---|
| Wildfire Likelihood | High — about 1 in 224 per year |
| Exposure | Indirect within ember reach of burnable land |
Values are read at the parcel center point; lenders make the official flood determination.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures