Boulder County property record for 1900 Oak Ave, Boulder, CO 80304
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3 ba · 3,128 sqft · built 1920 |
| Lot Size | 0.207 acres (8,997 sqft) |
| Owner | 2 Company Names on File |
| Tax Bill | $6,236 (2025) |
| Deeds & Mortgages | Mar 2023 Transfer Mar 2023 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 1463-18-4-16-004 |
| Primary APN | 1463-18-4-16-004 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 8 Rooms |
| Stories | 2 Stories |
| Building Area | 3,128 sqft Living Area |
| 1st Floor Area | 1,016 sqft |
| Upper Floors Area | 1,096 sqft |
| Basement Area | 1,016 sqft |
| Finished Basement | 1,016 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1920 |
|---|---|
| Effective Year Built | Effective 1975 |
| Architectural Style | A-Frame |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Roof Material | Asphalt |
| Lot Area | 8,997 sqft (0.207 acres) |
| Garage Type | Detached |
| Garage Area | 360 sqft |
| Parking Spaces | 1 Parking Space |
| Porch | Porch |
| Porch Area | 432 sqft |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0072714 |
|---|---|
| Street Address | 1900 OAK AVE |
| City | BOULDER |
| State | CO |
| Zip | 80304-1319 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 4 GRENIS |
| Legal Range | 70 |
| Legal Township | 1N |
| Legal Section | 18 |
| Legal Subdivision | GRENIS - BO |
| Legal Block | 2 |
| Legal Lot Number | 4 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 2 |
| Census Block | 2023 |
| Census Tract | 12103 |
Source: Boulder County records · APN 1463-18-4-16-004
Assessment roll updated June 15, 2026 · Last verified August 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Company Names on File |
|---|---|
| Mailing Address | 1900 OAK AVE, BOULDER, CO 80304-1319 |
| Owner Type | Company |
| Vesting | Trust |
| Date | Document |
|---|---|
| Mar 28, 2023 | Intrafamily Transfer, Transfer |
| Mar 28, 2023 | Intrafamily Transfer, Transfer |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Apr 21, 1987 |
| Deed Sale | Apr 21, 1987 |
| Prior Sale | Aug 01, 1978 · Amount on Record |
| Deed Document Number | 1987842978 |
| Last Transfer Date | Mar 23, 2023 |
| Transfer Doc | 0004001897 |
| Record Updated | Sep 20, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Mar 28, 2023 |
| Property Address | 1900 OAK AVE, BOULDER, CO 80304-1319 |
| Document Number | 0004001897 |
| Instrument Date | Mar 23, 2023 |
| Instrument | 4001897 |
| Transaction Type | Transfer |
| Record Updated | Apr 05, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Revocable Trust |
| Address | 1900 OAK AVE, BOULDER, CO 80304-1319 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Mar 28, 2023 |
| Property Address | 1900 OAK AVE, BOULDER, CO 80304-1319 |
| Document Number | 0004001898 |
| Instrument Date | Mar 23, 2023 |
| Instrument | 4001898 |
| Transaction Type | Transfer |
| Record Updated | Apr 05, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Revocable Trust |
| Address | 1900 OAK AVE, BOULDER, CO 80304-1319 |
Source: Boulder County records · Assessment roll updated June 15, 2026 · Last verified August 2026
| Type | Name |
|---|---|
| State | Colorado |
| County | Boulder County |
| Municipality | Boulder City |
| 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 | $77,962 (+8.8%) Land $50,463 Building $27,499 | $1,146,500 (-) Land $742,100 Building $404,400 | |
| 2025 | $6,236.00 (+2.67%) | $71,656 (-11.24%) Land $46,381 Building $25,275 | $1,146,500 (-4.85%) Land $742,100 Building $404,400 |
| 2023 | $6,074.00 (+18.66%) | $80,728 (+30.03%) Land $47,925 Building $32,803 | $1,204,900 (+34.88%) Land $715,300 Building $489,600 |
| 2022 | $5,119.00 | $62,084 Land $38,864 Building $23,220 | $893,300 Land $559,200 Building $334,100 |
Source: FEMA National Flood Hazard Layer as of October 14, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 31 policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 31 in force |
| Nearby Flood Claims | 26 (1995–2014) |
| Claims Outside the SFHA | 14 of 26 |
| Most Recent Claim | May 2014 · other causes |
| Claims by Event |
|
| Wildfire Risk | Low lower than 80% of the US · lower than 91% of Colorado |
|---|---|
| Wildfire Likelihood | 0.02% annual chance |
| Exposure | None beyond ember reach |
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: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026
| Provider | Max Down / Up (Mbps) |
|---|---|
| Lumen Technologies Fiber · DSL in parts of the area | 8,000 / 8,000 |
| Ayva Fixed Wireless | 2,500 / 2,500 |
| Xfinity Cable | 2,000 / 250 |
| Live Wire Networks Fixed Wireless | 250 / 100 |
May also be available: T-Mobile USA, Verizon.
Based on FCC filings for 482 locations within half a mile of this property.
5G (outdoors only) and 4G LTE
Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026
| Water System | CITY OF BOULDER serves 166,080 people |
|---|---|
| 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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.
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