Boulder County property record for 525 21st St, Boulder, CO 80302 · Last verified July 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 2 Beds |
| Bathrooms | 1.75 Baths |
| Year Built | Built 1954 |
| Square Footage | 1,084 sqft Living Area |
| Lot Size | 6,867 sqft (0.158 acres) |
| Occupancy | Owner Occupied |
| Last Sale | $22,200 (1980) |
| Tax Bill | $7,059.00 (2025) |
| Primary APN | 1577-06-1-12-006 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1.75 Baths |
| Partial Baths | 1 Partial Baths |
| Total Rooms | 6 Rooms |
| Building Area | 1,084 sqft Living Area |
| Gross Area | 2,168 sqft Gross Area |
| 1st Floor | 1,084 sqft 1st Floor |
| Basement Area | 1,084 sqft Basement |
| Stories | 1 Stories |
| Interior Structure | Plaster Interior Structure |
| Year Built | Built 1950 |
|---|---|
| Effective Year Built | Effective 1954 |
| Architectural Style | Ranch Style |
| Exterior Material | Wood Shingle Exterior |
| Construction Type | Frame Construction |
| Roof Material | Asphalt Roof |
| Lot Area | 6,867 sqft (0.158 acres) |
| Parking Spaces | 2 Parking Spaces |
| Garage Type | Detached Garage |
| Garage Area | 616 sqft Garage |
| Total Buildings | 2 Total Buildings |
| Deck Area | 442 sqft Deck |
| Heating System | Forced Air with Air Conditioning Heating |
|---|
| Account Number | R0001994 |
|---|---|
| Street Address | 525 21ST ST |
| City | BOULDER |
| State | CO |
| Zip | 80302-7907 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | LOT 6 BLK 4 INTERURBAN PARK |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 06 |
| Legal Subdivision | INTERURBAN PARK - BO |
| Legal Block | 4 |
| Legal Lot Number | 6 |
| Jurisdiction | BOULDER CO |
| Minor Civil Division | BOULDER |
| Census Blockgroup | 1 |
| Census Block | 1013 |
| Census Tract | 12505 |
Source: Boulder County records · APN 1577-06-1-12-006
Assessment roll updated June 15, 2026 · Last verified July 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Owner on File |
|---|---|
| Mailing Address | 525 21ST ST, BOULDER, CO 80302-7907 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Deed Names | Verified Name on Deed |
|---|---|
| Known Transactions |
|
| Deed Doc Number | 1980420686 |
| Record Refreshed | Sep 20, 2026 |
Source: Boulder County records · Assessment roll updated June 15, 2026 · Last verified July 2026
| Type | Name |
|---|---|
| State | Colorado |
| County | Boulder County |
| Municipality | Boulder City |
| Unified School District | Boulder Valley School District RE-2 (PK - 12) |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $87,353 (+8.8%) Land $62,832 Building $24,521 | $1,284,600 (-) Land $924,000 Building $360,600 | |
| 2025 | $7,059.00 (+15.82%) | $80,288 (-0.84%) Land $57,750 Building $22,538 | $1,284,600 (+6.3%) Land $924,000 Building $360,600 |
| 2023 | $6,095.00 (+5.94%) | $80,969 (+17.51%) Land $58,846 Building $22,123 | $1,208,500 (+21.9%) Land $878,300 Building $330,200 |
| 2022 | $5,753.00 | $68,902 Land $48,212 Building $20,690 | $991,400 Land $693,700 Building $297,700 |
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