Boulder County property record for 1859 23rd St, Boulder, CO 80302
| Property Type | Multi-Family Dwellings |
|---|---|
| Details | 7 bd · 4.75 ba · 4,059 sqft · built 1915 |
| Lot Size | 0.134 acres (5,827 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $32,500 (Aug 1976) |
| Tax Bill | $10,773 (2025) |
| Flood Zone | Zone X (moderate risk) |
| APN | 1463-30-4-47-006 |
| Primary APN | 1463-30-4-47-006 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 7 Beds |
|---|---|
| Full Baths | 4.75 Baths |
| Half Baths | 3 Half Baths |
| Total Rooms | 15 Rooms |
| Units | 4 Units |
| Building Area | 4,059 sqft Living Area |
| 1st Floor Area | 1,596 sqft |
| Upper Floors Area | 1,895 sqft |
| Basement Area | 568 sqft |
| Finished Basement | 568 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1915 |
|---|---|
| Effective Year Built | Effective 1963 |
| Architectural Style | A-Frame |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Lot Area | 5,827 sqft (0.134 acres) |
| Garage Type | Detached |
| Garage Area | 576 sqft |
| Parking Spaces | 4 Parking Spaces |
| Porch | Porch |
| Porch Area | 154 sqft |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0008487 |
|---|---|
| Street Address | 1859 23RD ST |
| City | BOULDER |
| State | CO |
| Zip | 80302-5650 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Multi-Family Dwellings |
| Legal Description | LOT 6 BLK C EAST BOULDER |
| Legal Range | 70 |
| Legal Township | 1N |
| Legal Section | 30 |
| Legal Subdivision | BOULDER O T EAST & WEST & NORTH - BO |
| Legal Block | C |
| Legal Lot Number | 6 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 2 |
| Census Block | 2011 |
| Census Tract | 12205 |
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 | 3351 19TH ST, BOULDER, CO 80304-2302 |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Aug 26, 1976 · Amount on Record |
| Deed Sale | Aug 26, 1976 · Amount on Record |
| Deed Document Number | 1976189523 |
| Last Transfer Date | Jun 27, 2003 |
| Transfer Doc | 0002462886 |
| Record Updated | Oct 29, 2026 |
Source: Boulder County assessment roll, as of September 18, 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 | $114,492 (+4.46%) Land $59,106 Building $55,386 | $1,753,700 (-) Land $869,200 Building $884,500 | |
| 2025 | $10,773.00 (-4.29%) | $109,606 (-16.05%) Land $54,325 Building $55,281 | $1,753,700 (-1%) Land $869,200 Building $884,500 |
| 2023 | $11,256.00 (+41.76%) | $130,556 (+58.67%) Land $58,236 Building $72,320 | $1,948,600 (+61.04%) Land $869,200 Building $1,079,400 |
| 2022 | $7,940.00 | $82,280 Land $36,380 Building $45,900 | $1,210,000 Land $535,000 Building $675,000 |
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 moderate risk |
|---|---|
| 500-Year Floodplain | Yes 0.2% annual chance |
| Nearest Special Flood Hazard Area | Zone AE, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 31 individual policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 64 units insured incl. 33 condo units |
| Nearby Flood Claims | 6 (2013) |
| Claims Outside the SFHA | 2 of 6 |
| Most Recent Claim | Sep 2013 · Severe Storms, Flooding, Landslides, And Mudslides |
| Claims by Event |
|
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 | Not rated no burnable land within ember reach |
|---|
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 663 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 |
| Verizon Fixed Wireless | 300 / 20 |
| LiveWireNet Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: AT&T.
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