Denver City property record for 3737 W 21st Ave, Denver, CO 80211
| Property Type | Duplex |
|---|---|
| Details | 4 bd · 1 ba · 2,121 sqft · built 1953 |
| Lot Size | 0.219 acres (9,520 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $5,436 (2025) |
| APN | 02311-44-007-000 |
| Primary APN | 02311-44-007-000 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 9 Rooms |
| Units | 4 Units |
| Stories | 2 Stories |
| Building Area | 2,121 sqft Living Area |
| Gross Area | 2,691 sqft |
| 1st Floor Area | 1,564 sqft |
| Basement Area | 570 sqft |
| Year Built | Built 1953 |
|---|---|
| Effective Year Built | Effective 1953 |
| Architectural Style | Duplex Single |
| Exterior Material | Brick |
| Construction Type | Wood |
| Lot Area | 9,520 sqft (0.219 acres) |
| Garage Type | Detached |
| Garage Area | 634 sqft |
| Patio Area | 85 sqft |
| Cooling System | Evaporative |
|---|---|
| Heating System | Forced Air with A/C |
| Street Address | 3737 W 21ST AVE |
|---|---|
| City | DENVER |
| State | CO |
| Zip | 80211-5007 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | U-SU-C1 |
| Legal Description | L 13 TO 15 INC BLK 7 HIGHLAND VIEW SUB |
| Legal Subdivision | HIGHLAND VIEW SUB |
| Legal Block | 7 |
| Legal Lot Number | 13-15 |
| Jurisdiction | DENVER CO |
| Township / Civil Division | DENVER |
| Census Block Group | 2 |
| Census Block | 2026 |
| Census Tract | 503 |
3737 W 21st Ave, a duplex, is owned and occupied by two individuals who acquired it in October 1999.
Source: Denver City records, as of May 29, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 3737 W 21ST AVE, DENVER, CO 80211-5007 |
| 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 | Oct 8, 1999 |
| Deed Sale | Oct 8, 1999 |
| Deed Document Number | 1999177117 |
| Prior Transfer Date | Sep 27, 1999 |
| Prior Transfer Doc | 0000177117 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 3737 W 21st Ave was $5,436.
Source: Denver City assessment roll, as of May 29, 2026
| Type | Name |
|---|---|
| State | Colorado |
| County / Municipality | Denver City |
| Unified School District | Denver County School District 1 (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $5,436.00 | $78,120 Land $75,390 Building $75,390 | $1,108,000 Land $1,069,300 Building $38,700 |
| 2023 | $5,593.00 | $78,890 (+28.86%) Land $59,360 Building $19,530 | $1,232,400 (+36.9%) Land $940,900 Building $291,500 |
| 2022 | $61,220 Land $55,260 Building $5,960 | $900,200 Land $812,600 Building $87,600 | |
| 2021 | $4,268.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA has no flood map on file for 3737 W 21st Ave; 1 flood insurance policy is in force nearby.
Source: FEMA National Flood Hazard Layer · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Not on file |
|---|---|
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 1 in force |
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.
The area around 3737 W 21st Ave has no burnable land within ember reach, so its wildfire risk is not rated.
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 | DENVER WATER BOARD serves 1,287,000 people · EPA ID CO0116001 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Aug 2025 |
| Lead | 4 ppb (2026) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 33 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 993 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| CenturyLink Fiber · DSL in parts of the area | 8,000 / 8,000 |
| Xfinity Cable | 2,000 / 250 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: Aerux Broadband, LiveWireNet, Starry, Verizon, WiFiHood.
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