Boulder County property record for 421 Gold Run St, Boulder, CO 80302
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 746 sqft · built 1895 |
| Lot Size | 0.288 acres (12,536 sqft) |
| Owner | 2 Individual Names on Record |
| Tax Bill | $1,109 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 1459-12-0-08-005 |
| Primary APN | 1459-12-0-08-005 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 746 sqft Living Area |
| 1st Floor Area | 746 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1895 |
|---|---|
| Effective Year Built | Effective 1895 |
| Architectural Style | Ranch |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Lot Area | 12,536 sqft (0.288 acres) |
| Account Number | R0023731 |
|---|---|
| Street Address | 421 GOLD RUN ST |
| City | BOULDER |
| State | CO |
| Zip | 80302-8701 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | H |
| Legal Description | LOT 7 LESS N 31 FT OF E 21 FT & LOTS 8 & 9 BLK 9 GOLD HILL |
| Legal Range | 72 |
| Legal Township | 1N |
| Legal Section | 12 |
| Legal Subdivision | GOLD HILL - MT |
| Legal Block | 9 |
| Legal Lot Number | 7 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BALD MOUNTAIN |
| Census Block Group | 2 |
| Census Block | 2024 |
| Census Tract | 13703 |
Source: NPS National Register of Historic Places, as of August 1, 2026
| Historic District | Within the Gold Hill Historic District listed 1989 · 38 contributing resources · NRIS 89000979 |
|---|
Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.
Source: Boulder County records, as of September 18, 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 Record |
|---|---|
| Mailing Address | 421 GOLD RUN ST, BOULDER, CO 80302-8701 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Nov 16, 1990 |
| Deed Sale | Nov 16, 1990 |
| Prior Sale | Oct 2, 1990 |
| Deed Document Number | 19901074298 |
| Last Transfer Date | Sep 11, 2024 |
| Transfer Doc | 0004061383 |
| Record Updated | Oct 29, 2026 |
Source: Boulder County assessment roll, as of September 18, 2026
| Type | Name |
|---|---|
| State | Colorado |
| County | Boulder County |
| Unified School District | Boulder Valley School District RE-2 (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $17,577 (-2.08%) Land $162 Building $17,415 | $287,200 (-) Land $31,100 Building $256,100 | |
| 2025 | $1,109.00 (-20.62%) | $17,950 (-10.1%) Land $1,944 Building $16,006 | $287,200 (-3.62%) Land $31,100 Building $256,100 |
| 2023 | $1,397.00 (-7.67%) | $19,966 (+21.78%) Land $2,298 Building $17,668 | $298,000 (+26.32%) Land $34,300 Building $263,700 |
| 2022 | $1,513.00 | $16,395 Land $1,578 Building $14,817 | $235,900 Land $22,700 Building $213,200 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
Source: FEMA National Flood Hazard Layer, effective October 14, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 7 in force |
| Nearby Flood Claims | 3 (2013) |
| Claims Outside the SFHA | 3 of 3 |
| Most Recent Claim | Sep 2013 · Severe Storms, Flooding, Landslides, And Mudslides |
| Claims by Event |
|
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: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Extreme above 95% of the US · above 98.2% of Colorado |
|---|---|
| Wildfire Likelihood | 1% annual chance |
| Exposure | Direct burnable vegetation |
Insurers in high-risk areas may require mitigation or decline coverage; check availability before making an offer.
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: FCC Broadband Data Collection, based on 34 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Ayva Networks Fixed Wireless | 2,500 / 2,500 |
| Visionary Broadband Fixed Wireless | 200 / 20 |
| CenturyLink DSL | 100 / 10 |
May also be available: Xfinity.
4G LTE (outdoors only), no 5G reported
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