Boulder County property record for 4405 Mast Rd, Boulder, CO 80301 · Last verified June 2026
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 1,008 sqft · built 1976 |
| Lot Size | 0.14 acres (6,090 sqft) |
| Owner | Individual Name on File |
| Last Sale | $35,000 (May 1976) |
| Tax Bill | $3,497 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 1463-14-2-14-010 |
| Primary APN | 1463-14-2-14-010 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 1,008 sqft Living Area |
| Gross Area | 2,331 sqft |
| 1st Floor Area | 1,008 sqft |
| Basement Area | 1,008 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1976 |
|---|---|
| Effective Year Built | Effective 1976 |
| Architectural Style | Ranch |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Lot Area | 6,090 sqft (0.14 acres) |
| Garage Type | Attached |
| Garage Area | 315 sqft |
| Parking Spaces | 1 Parking Space |
| Porch | Porch |
| Porch Area | 30 sqft |
| Patio Area | 130 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Account Number | R0038560 |
|---|---|
| Street Address | 4405 MAST RD |
| City | BOULDER |
| State | CO |
| Zip | 80301-3181 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 10 BLK 12 TWIN LAKES 2 REPLAT OF BLKS 10 11 & 12 |
| Legal Range | 70 |
| Legal Township | 1N |
| Legal Section | 14 |
| Legal Subdivision | TWIN LAKES 1,2 & REPLATS - BOV |
| Legal Block | 12,10 |
| Legal Lot Number | 10 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 12708 |
Source: Boulder County records · APN 1463-14-2-14-010
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 | 4405 MAST RD, BOULDER, CO 80301-3181 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | May 03, 1976 · Amount on Record |
| Deed Sale | May 03, 1976 · Amount on Record |
| Deed Document Number | 1976175275 |
| Record Updated | Sep 20, 2026 |
Source: Boulder County records · Assessment roll updated June 15, 2026 · Last verified June 2026
| Type | Name |
|---|---|
| State | Colorado |
| County | Boulder County |
| Unified School District | Boulder Valley School District RE-2 (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 | $44,540 (+8.8%) Land $20,393 Building $24,147 | $655,000 (-) Land $299,900 Building $355,100 | |
| 2025 | $3,497.00 (+14.39%) | $40,938 (-6.57%) Land $18,744 Building $22,194 | $655,000 (+0.15%) Land $299,900 Building $355,100 |
| 2023 | $3,057.00 (+21.36%) | $43,818 (+34.46%) Land $17,929 Building $25,889 | $654,000 (+39.48%) Land $267,600 Building $386,400 |
| 2022 | $2,519.00 | $32,589 Land $13,650 Building $18,939 | $468,900 Land $196,400 Building $272,500 |
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 |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Wildfire Risk | Moderate above 62% of the US · above 51% of Colorado |
|---|---|
| Wildfire Likelihood | About 1 in 493 per year |
| Exposure | Direct burnable vegetation at the parcel |
Values are read at the parcel center point; lenders make the official flood determination.
Source: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 334 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Ayva | Fixed Wireless (unlicensed) | 2,500 / 2,500 |
| Xfinity | Cable | 2,000 / 250 |
| Verizon | Fixed Wireless | 300 / 20 |
| Live Wire Networks | Fixed Wireless (licensed-by-rule) | 250 / 100 |
| Lumen Technologies | DSL | 140 / 20 |
Availability varies by address; speeds are provider-advertised maximums, not measured.
5G and 4G LTE
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