Boulder County property record for 4415 Mast Rd, Boulder, CO 80301
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1.75 ba · 1,964 sqft · built 1976 |
| Lot Size | 0.163 acres (7,118 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $525,000 (Oct 2018) |
| Tax Bill | $5,495 (2025) |
| Deeds & Mortgages | Aug 2023 Sale Oct 2018 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 1463-14-2-14-009 |
| Primary APN | 1463-14-2-14-009 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1.75 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 1,964 sqft Living Area |
| Gross Area | 2,750 sqft |
| 1st Floor Area | 1,014 sqft |
| Basement Area | 1,014 sqft |
| Finished Basement | 950 sqft |
| Unfinished Basement | 64 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1976 |
|---|---|
| Effective Year Built | Effective 2007 |
| Architectural Style | Ranch |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Roof Material | Asphalt |
| Lot Area | 7,118 sqft (0.163 acres) |
| Garage Type | Attached |
| Garage Area | 546 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Enclosed Porch |
| Porch Area | 176 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Account Number | R0038559 |
|---|---|
| Street Address | 4415 MAST RD |
| City | BOULDER |
| State | CO |
| Zip | 80301-3182 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | SR |
| Legal Description | LOT 9 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 | 9 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 12708 |
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 | 2643 LAKE DR SE, GRAND RAPIDS, MI 49506-3124 |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Aug 1, 2023 | Beneficiary Deed, Transfer |
| Oct 11, 2018 | Warranty Deed, Transfer LAND TITLE GUARANTEE |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Oct 11, 2018 · Amount on Record |
| Deed Sale | Oct 11, 2018 · Amount on Record |
| Prior Sale | Jun 10, 2008 · Amount on Record |
| Deed Document Number | 20183680750 |
| Last Transfer Date | Jun 30, 2023 |
| Transfer Doc | 0004016737 |
| Record Updated | Oct 29, 2026 |
| Document Type | Beneficiary Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Aug 1, 2023 |
| Property Address | 4415 MAST RD, BOULDER, CO 80301-3182 |
| Document Number | 0004016737 |
| Instrument Date | Jun 30, 2023 |
| Instrument | 4016737 |
| Transaction Type | Transfer |
| Record Updated | Aug 25, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|---|
| Address | 2643 LAKE DR SE, GRAND RAPIDS, MI 49506-3124 |
| Name | Verified Name |
|---|---|
| Address | 4415 MAST RD, BOULDER, CO 80301-3182 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Oct 11, 2018 |
| Property Address | 4415 MAST RD, BOULDER, CO 80301-3182 |
| Document Number | 0003680750 |
| Instrument Date | Oct 9, 2018 |
| Instrument | 3680750 |
| Transaction Type | Transfer |
| Record Updated | Oct 22, 2018 |
| Title Company | LAND TITLE GUARANTEE |
| Amount | Amount Recorded |
|---|---|
| Tax | $52.50 |
| Amount Accuracy | Confirmed |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
| Address | 4415 MAST RD BOULDER CO 803013182, BOULDER, CO 80301-3182 |
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 | $54,835 (+0.11%) Land $16,014 Building $38,821 | $876,400 (-) Land $305,500 Building $570,900 | |
| 2025 | $5,495.00 (+10.99%) | $54,775 (-5.66%) Land $19,094 Building $35,681 | $876,400 (+1.13%) Land $305,500 Building $570,900 |
| 2023 | $4,951.00 (+18.81%) | $58,063 (+36.15%) Land $18,278 Building $39,785 | $866,600 (+41.23%) Land $272,800 Building $593,800 |
| 2022 | $4,167.00 | $42,645 Land $13,935 Building $28,710 | $613,600 Land $200,500 Building $413,100 |
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.
Source: FEMA National Flood Hazard Layer, effective October 14, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 62% of the US · above 50% of Colorado |
|---|---|
| Wildfire Likelihood | 0.2% annual chance |
| Exposure | Direct burnable vegetation |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | CITY OF BOULDER serves 166,080 people · EPA ID CO0107152 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Sep 2024 |
| Lead | 2 ppb (2023–2025) action level 15 ppb |
| Water Quality | Haloacetic acids resolved · Jul 2017 |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 1 last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 334 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Ayva Networks Fixed Wireless | 2,500 / 2,500 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| LiveWireNet Fixed Wireless | 250 / 100 |
| CenturyLink DSL | 140 / 20 |
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