Boulder County property record for 303 21st St, Boulder, CO 80302 · Last verified June 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 3 Beds |
| Bathrooms | 2.5 Baths |
| Year Built | Built 1978 |
| Square Footage | 2,359 sqft Living Area |
| Lot Size | 9,032 sqft (0.207 acres) |
| Garage | Attached, 252 sqft |
| Occupancy | Owner Occupied |
| Tax Bill | $8,846.00 (2025) |
| Primary APN | 1577-06-1-10-011 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Partial Baths | 2 Partial Baths |
| Total Rooms | 6 Rooms |
| Building Area | 2,359 sqft Living Area |
| Gross Area | 2,707 sqft Gross Area |
| 1st Floor | 1,295 sqft 1st Floor |
| Basement Area | 1,064 sqft Basement |
| Finished Basement | 420 sqft Finished |
| Unfinished Basement | 644 sqft Unfinished |
| Interior Structure | Wallboard/Drywall Interior Structure |
| Year Built | Built 1971 |
|---|---|
| Effective Year Built | Effective 1978 |
| Architectural Style | Split Level Style |
| Exterior Material | Brick Veneer Exterior |
| Construction Type | Frame Construction |
| Roof Material | Asphalt Roof |
| Lot Area | 9,032 sqft (0.207 acres) |
| Parking Spaces | 1 Parking Spaces |
| Garage Type | Attached Garage |
| Garage Area | 252 sqft Garage |
| Deck Area | 255 sqft Deck |
|---|---|
| Patio Area | 411 sqft Patio |
| Porch | Enclosed Porch |
| Porch Area | 147 sqft Porch |
| Heating System | Hot Water Heating |
|---|
| Account Number | R0006899 |
|---|---|
| Street Address | 303 21ST ST |
| City | BOULDER |
| State | CO |
| Zip | 80302-8012 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | E 1/2 OF S 48 FT LOT 11 E 1/2 LOT 12 & ALLEY ADJ BLK 16 INTERURBAN PARK |
| Legal Range | 70 |
| Legal Township | 1S |
| Legal Section | 06 |
| Legal Subdivision | INTERURBAN PARK - BO |
| Legal Block | 16 |
| Legal Lot Number | 11 |
| Jurisdiction | BOULDER CO |
| Minor Civil Division | BOULDER |
| Census Blockgroup | 1 |
| Census Block | 1025 |
| Census Tract | 12505 |
Source: Boulder County records · APN 1577-06-1-10-011
Assessment roll updated June 15, 2026 · Last verified June 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individuals Owners |
|---|---|
| Mailing Address | 303 21ST ST, BOULDER, CO 80302-8012 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Known Transactions |
|
| Deed Doc Number | 19891018517 |
| Last Transfer Date | Mar 13, 2015 |
| Transfer Doc | 0003433098 |
| Record Refreshed | Sep 20, 2026 |
Source: Boulder County records · Assessment roll updated June 15, 2026 · Last verified June 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 | $107,746 (+8.8%) Land $72,060 Building $35,686 | $1,584,500 (-) Land $1,059,700 Building $524,800 | |
| 2025 | $8,846.00 (+14.27%) | $99,031 (-1%) Land $66,231 Building $32,800 | $1,584,500 (+6.13%) Land $1,059,700 Building $524,800 |
| 2023 | $7,741.00 (+4.3%) | $100,031 (+15.13%) Land $66,457 Building $33,574 | $1,493,000 (+19.43%) Land $991,900 Building $501,100 |
| 2022 | $7,422.00 | $86,882 Land $54,717 Building $32,165 | $1,250,100 Land $787,300 Building $462,800 |
Search by:
By searching, you agree to: Terms • Privacy • Disclosures