Boulder County property record for 439 Seward St, Lyons, CO 80540 · Last verified June 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 3 Beds |
| Bathrooms | 1 Baths |
| Year Built | Built 1903 |
| Square Footage | 1,322 sqft Living Area |
| Lot Size | 10,482 sqft (0.241 acres) |
| Garage | Detached, 360 sqft |
| Last Sale | $57,500 (1980) |
| Tax Bill | $3,084.00 (2025) |
Source: Boulder County records · APN 1203-18-1-08-007
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 | 2 Individual Names on File |
|---|---|
| Mailing Address | PO BOX 1022, LYONS, CO 80540-1022 |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Sep 04, 1980 · Amount on Record |
| Deed Sale | Sep 04, 1980 · Amount on Record |
| Prior Sale | Sep 06, 1978 · Amount on Record |
| Deed Doc Number | 1980411068 |
| 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 | $31,464 (+8.8%) Land $5,372 Building $26,092 | $462,700 (-) Land $79,000 Building $383,700 | |
| 2025 | $3,084.00 (+6.57%) | $28,919 (-17.5%) Land $4,938 Building $23,981 | $462,700 (-11.56%) Land $79,000 Building $383,700 |
| 2023 | $2,894.00 (+25.28%) | $35,055 (+36.43%) Land $4,583 Building $30,472 | $523,200 (+41.52%) Land $68,400 Building $454,800 |
| 2022 | $2,310.00 | $25,694 Land $4,198 Building $21,496 | $369,700 Land $60,400 Building $309,300 |
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 · Last verified: October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Special Flood Hazard Area | No |
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Wildfire Risk | High above 75% of the US · above 74% of Colorado |
|---|---|
| Wildfire Likelihood | About 1 in 316 per year |
| Exposure | Indirect within ember reach |
Values are read at the parcel center point; 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.
| Primary APN | 1203-18-1-08-007 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Baths |
| Total Rooms | 6 Rooms |
| Building Area | 1,322 sqft Living Area |
| Gross Area | 1,382 sqft Gross Area |
| 1st Floor | 880 sqft 1st Floor |
| Upper Floors | 442 sqft Upper Floors |
| Stories | 2 Stories |
| Interior Structure | Plaster Interior Structure |
| Year Built | Built 1903 |
|---|---|
| Effective Year Built | Effective 1903 |
| Architectural Style | A-Frame Style |
| Exterior Material | Wood Shingle Exterior |
| Construction Type | Frame Construction |
| Lot Area | 10,482 sqft (0.241 acres) |
| Parking Spaces | 1 Parking Spaces |
| Garage Type | Detached Garage |
| Garage Area | 360 sqft Garage |
| Porch | Enclosed Porch |
| Porch Area | 60 sqft Porch |
| Heating System | Gravity Heating |
|---|
| Account Number | R0050350 |
|---|---|
| Street Address | 439 SEWARD ST |
| City | LYONS |
| State | CO |
| Zip | 80540-5046 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | LOT 11 BLK 1 NORTONVILLE |
| Legal Range | 70 |
| Legal Township | 3N |
| Legal Section | 18 |
| Legal Subdivision | NORTONVILLE - LY |
| Legal Block | 1 |
| Legal Lot Number | 11 |
| Jurisdiction | BOULDER CO |
| Minor Civil Division | LONGMONT |
| Census Blockgroup | 3 |
| Census Block | 3001 |
| Census Tract | 13601 |
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