Boulder County property record for 1840 23rd St, Boulder, CO 80302
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 878 sqft · built 1940 |
| Lot Size | 0.117 acres (5,114 sqft) |
| Owner | Company Name on Record |
| Last Sale | $82,000 (Apr 1984) |
| Tax Bill | $5,655 (2025) |
| Deeds & Mortgages | Dec 2017 Sale |
| Flood Zone | Zone X (moderate risk) |
| APN | 1463-30-4-49-008 |
| Primary APN | 1463-30-4-49-008 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 878 sqft Living Area |
| 1st Floor Area | 878 sqft |
| Interior Walls | Plaster |
| Year Built | Built 1940 |
|---|---|
| Effective Year Built | Effective 1975 |
| Architectural Style | Ranch |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Roof Material | Asphalt |
| Lot Area | 5,114 sqft (0.117 acres) |
| Porch | Porch |
| Porch Area | 70 sqft |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0006995 |
|---|---|
| Street Address | 1840 23RD ST |
| City | BOULDER |
| State | CO |
| Zip | 80302-5604 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | W 100 FT LOT 11 BLK B BOULDER EAST |
| Legal Range | 70 |
| Legal Township | 1N |
| Legal Section | 30 |
| Legal Subdivision | BOULDER O T EAST & WEST & NORTH - BO |
| Legal Block | B |
| Legal Lot Number | 11 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 2 |
| Census Block | 2013 |
| 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 | Company Name on Record |
|---|---|
| Mailing Address | 2737 MAPLETON AVE, 102, BOULDER, CO 80304-3836 |
| Owner Type | Company |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Apr 17, 1984 · Amount on Record |
| Deed Sale | Apr 17, 1984 · Amount on Record |
| Prior Sale | Apr 21, 1976 · Amount on Record |
| Deed Document Number | 1984615525 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Dec 20, 2017 |
| Property Address | 1840 23RD ST, BOULDER, CO 80302-5604 |
| Document Number | 0003632164 |
| Instrument Date | Sep 1, 2017 |
| Instrument | 3632164 |
| Transaction Type | Transfer |
| Record Updated | Jan 3, 2018 |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Company |
| Address | 2737 MAPLETON AVE #102 BOULDER CO 803043836, 102, BOULDER, CO 80304-3836 |
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 | $58,847 (+0.66%) Land $50,769 Building $8,078 | $935,400 (-) Land $816,600 Building $118,800 | |
| 2025 | $5,655.00 (+7.51%) | $58,463 (-6.68%) Land $51,038 Building $7,425 | $935,400 (+0.04%) Land $816,600 Building $118,800 |
| 2024 | $5,260.00 (+1.82%) | ||
| 2023 | $5,166.00 (+13.44%) | $62,645 (+29.86%) Land $56,997 Building $5,648 | $935,000 (+34.71%) Land $850,700 Building $84,300 |
| 2022 | $4,554.00 | $48,240 Land $43,416 Building $4,824 | $694,100 Land $624,690 Building $69,410 |
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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