Boulder County property record for 3780 23rd St, Boulder, CO 80304
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 4 ba · 5,429 sqft · built 2008 |
| Lot Size | 0.822 acres (35,809 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $875,000 (Sep 2003) |
| Tax Bill | $26,631 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 1463-19-1-04-003 |
| Primary APN | 1463-19-1-04-003 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 4 Baths |
| Half Baths | 2 Half Baths |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 5,429 sqft Living Area |
| Gross Area | 6,221 sqft |
| 1st Floor Area | 3,881 sqft |
| Upper Floors Area | 1,548 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 2008 |
|---|---|
| Effective Year Built | Effective 2009 |
| Architectural Style | A-Frame |
| Exterior Material | Combination |
| Construction Type | Frame |
| Roof Material | Asphalt |
| Lot Area | 35,809 sqft (0.822 acres) |
| Garage Type | Attached |
| Garage Area | 792 sqft |
| Parking Spaces | 7 Parking Spaces |
| Greenhouse | Greenhouse |
| Total Buildings | 2 Buildings |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Account Number | R0000557 |
|---|---|
| Street Address | 3780 23RD ST |
| City | BOULDER |
| State | CO |
| Zip | 80304-1611 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 3 BLK 4 CAROLYN HEIGHTS |
| Legal Range | 70 |
| Legal Township | 1N |
| Legal Section | 19 |
| Legal Subdivision | CAROLYN HEIGHTS - BO |
| Legal Block | 4 |
| Legal Lot Number | 3 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 12103 |
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 Company Names on Record |
|---|---|
| Mailing Address | 3870 23RD ST, BOULDER, CO 80304 |
| Owner Type | Company |
| Vesting | Trust, Revocable Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Sep 30, 2003 · Amount on Record |
| Deed Sale | Sep 30, 2003 · Amount on Record |
| Deed Document Number | 20032509774 |
| Prior Transfer Date | Dec 12, 1997 |
| Prior Transfer Doc | 0001756071 |
| 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 | $299,125 (+7.1%) Land $76,479 Building $222,646 | $4,468,900 (-) Land $1,194,700 Building $3,274,200 | |
| 2025 | $26,631.00 (+2.09%) | $279,307 (-8.65%) Land $74,669 Building $204,638 | $4,468,900 (-2.08%) Land $1,194,700 Building $3,274,200 |
| 2023 | $26,087.00 (+24.76%) | $305,769 (+35.8%) Land $78,109 Building $227,660 | $4,563,700 (+40.87%) Land $1,165,800 Building $3,397,900 |
| 2022 | $20,909.00 | $225,163 Land $63,412 Building $161,751 | $3,239,750 Land $912,400 Building $2,327,350 |
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.
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 |
| Flood Insurance Cost | Premium on Record median of 18 policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 18 in force |
| Nearby Flood Claims | 3 (2013) |
| Claims Outside the SFHA | 3 of 3 |
| 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 | Low lower than 80% of the US · lower than 91% of Colorado |
|---|---|
| Wildfire Likelihood | 0.02% annual chance |
| Exposure | Direct burnable vegetation |
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 341 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Ayva Networks Fixed Wireless | 2,500 / 2,500 |
| Xfinity Cable | 2,000 / 250 |
| LiveWireNet Fixed Wireless | 250 / 100 |
| CenturyLink DSL · Fiber in parts of the area | 140 / 20 |
May also be available: T-Mobile, Verizon.
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