Boulder County property record for 1640 Oak Ave, Boulder, CO 80304
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3.25 ba · 3,311 sqft · built 1987 |
| Lot Size | 0.21 acres (9,127 sqft) |
| Owner | Individual Name on File |
| Last Sale | $545,000 (Feb 2003) |
| Tax Bill | $9,055 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 1463-18-3-40-002 |
| Primary APN | 1463-18-3-40-002 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3.25 Baths |
| Half Baths | 2 Half Baths |
| Total Rooms | 10 Rooms |
| Stories | 2 Stories |
| Building Area | 3,311 sqft Living Area |
| Gross Area | 3,748 sqft |
| 1st Floor Area | 1,298 sqft |
| Upper Floors Area | 844 sqft |
| Basement Area | 1,298 sqft |
| Finished Basement | 1,169 sqft |
| Unfinished Basement | 129 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1987 |
|---|---|
| Effective Year Built | Effective 1987 |
| Architectural Style | A-Frame |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Roof Material | Asphalt |
| Lot Area | 9,127 sqft (0.21 acres) |
| Garage Type | Attached |
| Garage Area | 308 sqft |
| Parking Spaces | 1 Parking Space |
| Deck Area | 874 sqft |
| Patio Area | 874 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Account Number | R0080295 |
|---|---|
| Street Address | 1640 OAK AVE |
| City | BOULDER |
| State | CO |
| Zip | 80304-1257 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 2 ROBINS NEST |
| Legal Range | 70 |
| Legal Township | 1N |
| Legal Section | 18 |
| Legal Subdivision | ROBINS NEST - BO |
| Legal Block | 3 |
| Legal Lot Number | 2 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 3 |
| Census Block | 3005 |
| Census Tract | 12105 |
Source: Boulder County records · APN 1463-18-3-40-002
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 | 1640 OAK AVE, BOULDER, CO 80304-1257 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Feb 10, 2003 · Amount on Record |
| Deed Sale | Feb 10, 2003 · Amount on Record |
| Prior Sale | Nov 02, 1992 · Amount on Record |
| Deed Document Number | 20032394396 |
| Last Transfer Date | Mar 03, 2008 |
| Transfer Doc | 0002923126 |
| 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 |
| 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, not market price estimates; both are a fraction of this property's market value.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $103,333 (+8.8%) Land $55,434 Building $47,899 | $1,519,600 (-) Land $815,200 Building $704,400 | |
| 2025 | $9,055.00 (+1.56%) | $94,975 (-11.19%) Land $50,950 Building $44,025 | $1,519,600 (-4.79%) Land $815,200 Building $704,400 |
| 2023 | $8,916.00 (+17.52%) | $106,939 (+30.89%) Land $52,669 Building $54,270 | $1,596,100 (+35.77%) Land $786,100 Building $810,000 |
| 2022 | $7,587.00 | $81,704 Land $42,492 Building $39,212 | $1,175,600 Land $611,400 Building $564,200 |
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 32 policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 32 in force |
| Nearby Flood Claims | 26 (2005–2015) |
| Claims Outside the SFHA | 10 of 26 |
| Most Recent Claim | May 2015 · Severe Storms, Tornadoes, Flooding, Landslides, And Mudslides |
| 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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