Boulder County property record for 4090 Darley Ave, Boulder, CO 80305
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 3 ba · 3,286 sqft · built 1962 |
| Lot Size | 0.175 acres (7,609 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $112,000 (Mar 1990) |
| Tax Bill | $7,122 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 1577-08-1-16-001 |
| Primary APN | 1577-08-1-16-001 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3 Baths |
| Half Baths | 3 Half Baths |
| Total Rooms | 8 Rooms |
| Stories | 2 Stories |
| Building Area | 3,286 sqft Living Area |
| Gross Area | 3,832 sqft |
| 1st Floor Area | 1,648 sqft |
| Upper Floors Area | 598 sqft |
| Basement Area | 1,040 sqft |
| Finished Basement | 1,040 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1962 |
|---|---|
| Effective Year Built | Effective 1975 |
| Exterior Material | Brick Veneer |
| Construction Type | Masonry / Concrete Block |
| Lot Area | 7,609 sqft (0.175 acres) |
| Garage Type | Attached |
| Garage Area | 546 sqft |
| Parking Spaces | 2 Parking Spaces |
| Deck Area | 104 sqft |
| Patio Area | 224 sqft |
| Heating System | Hot Water |
|---|
| Account Number | R0013246 |
|---|---|
| Street Address | 4090 DARLEY AVE |
| City | BOULDER |
| State | CO |
| Zip | 80305-6521 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 1 BLK 6 MOUNTAIN TERRACE |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 08 |
| Legal Subdivision | MOUNTAIN TERRACE - BO |
| Legal Block | 6 |
| Legal Lot Number | 1 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 1 |
| Census Block | 1010 |
| Census Tract | 12509 |
4090 Darley Ave is owned and occupied by two individuals who bought it in March 1990.
Source: Boulder County records, as of September 18, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 4090 DARLEY AVE, BOULDER, CO 80305-6521 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Mar 6, 1990 · Amount on File |
| Deed Sale | Mar 6, 1990 · Amount on File |
| Prior Sale | Oct 5, 1981 · Amount on File |
| Deed Document Number | 19901031234 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 4090 Darley Ave was $7,122.
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 | $83,307 (+2.92%) Land $55,971 Building $27,336 | $1,295,100 (-) Land $893,100 Building $402,000 | |
| 2025 | $7,122.00 | $80,944 Land $55,819 Building $25,125 | $1,295,100 Land $893,100 Building $402,000 |
| 2023 | $6,229.00 (+3.28%) | $82,524 (+14.77%) Land $64,052 Building $18,472 | $1,231,700 (+19.05%) Land $956,000 Building $275,700 |
| 2022 | $6,031.00 | $71,905 Land $47,114 Building $24,791 | $1,034,600 Land $677,900 Building $356,700 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 4090 Darley Ave in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1998.
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 | 7 in force |
| Nearby Flood Claims | 1 (1998) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Feb 1998 · tidal / storm surge |
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.
Wildfire risk around 4090 Darley Ave is low, with a 0.03% annual chance of wildfire.
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 | 0.03% annual chance |
| Exposure | None beyond 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 604 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 | 2,000 / 1,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| LiveWireNet Fixed Wireless | 250 / 100 |
May also be available: AT&T, T-Mobile.
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