Boulder County property record for 510 Maxwell Ave, Boulder, CO 80304
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.75 ba · 3,143 sqft · built 1895 |
| Lot Size | 0.155 acres (6,734 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $210,000 (Aug 1992) |
| Tax Bill | $14,131 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 1461-25-4-05-011 |
| Primary APN | 1461-25-4-05-011 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.75 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 9 Rooms |
| Stories | 2 Stories |
| Building Area | 3,143 sqft Living Area |
| 1st Floor Area | 1,309 sqft |
| Upper Floors Area | 1,292 sqft |
| Basement Area | 542 sqft |
| Finished Basement | 542 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1895 |
|---|---|
| Effective Year Built | Effective 1995 |
| Architectural Style | A-Frame |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Roof Material | Asphalt |
| Lot Area | 6,734 sqft (0.155 acres) |
| Garage Type | Detached |
| Garage Area | 440 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Porch |
| Porch Area | 150 sqft |
| Patio Area | 126 sqft |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0005088 |
|---|---|
| Street Address | 510 MAXWELL AVE |
| City | BOULDER |
| State | CO |
| Zip | 80304-3938 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 12 & E 1/2 LOT 13 BLK 4 MAPLETON |
| Legal Range | 71 |
| Legal Township | 1N |
| Legal Section | 25 |
| Legal Subdivision | MAPLETON - BO |
| Legal Block | 4 |
| Legal Lot Number | 12 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 4 |
| Census Block | 4005 |
| Census Tract | 12101 |
Source: Boulder County records, as of June 15, 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 | 510 MAXWELL AVE, BOULDER, CO 80304-3938 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Aug 31, 1992 · Amount on Record |
| Deed Sale | Aug 31, 1992 · Amount on Record |
| Prior Sale | Oct 2, 1986 · Amount on Record |
| Deed Document Number | 19921215531 |
| Last Transfer Date | Dec 6, 2016 |
| Transfer Doc | 0003561764 |
| Record Updated | Sep 20, 2026 |
Source: Boulder County assessment roll, as of June 15, 2026
| Type | Name |
|---|---|
| State | Colorado |
| County | Boulder County |
| Municipality | Boulder City |
| Unified School District | Boulder Valley School District RE-2 (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $168,048 (+8.8%) Land $109,575 Building $58,473 | $2,471,300 (-) Land $1,611,400 Building $859,900 | |
| 2025 | $14,131.00 (-3.94%) | $154,457 (-11.25%) Land $100,713 Building $53,744 | $2,471,300 (-4.86%) Land $1,611,400 Building $859,900 |
| 2023 | $14,711.00 (+25.98%) | $174,039 (+38.41%) Land $109,652 Building $64,387 | $2,597,600 (+43.57%) Land $1,636,600 Building $961,000 |
| 2022 | $11,677.00 | $125,746 Land $70,827 Building $54,919 | $1,809,300 Land $1,019,100 Building $790,200 |
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 | 15 units insured incl. 9 condo units |
| Nearby Flood Claims | 2 (2013) |
| Most Recent Claim | Sep 2013 · Severe Storms, Flooding, Landslides, And Mudslides |
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 | Moderate above 68% of the US · above 62% of Colorado |
|---|---|
| Wildfire Likelihood | 0.3% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 684 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Ayva Networks Fixed Wireless | 2,500 / 2,500 |
| CenturyLink Fiber · DSL in parts of the area | 2,000 / 1,000 |
| Xfinity Cable | 2,000 / 250 |
| LiveWireNet Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: Verizon.
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