Boulder County property record for 3633 21st St, Boulder, CO 80304 · Last verified June 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 7 Beds |
| Bathrooms | 4.25 Baths |
| Year Built | Built 2015 |
| Square Footage | 6,785 sqft Living Area |
| Lot Size | 35,311 sqft (0.811 acres) |
| Occupancy | Owner Occupied |
| Last Sale | $4,500,000 (2022) |
| Tax Bill | $29,641.00 (2025) |
| Primary APN | 1463-19-1-31-002 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 7 Beds |
|---|---|
| Full Baths | 4.25 Baths |
| Partial Baths | 2 Partial Baths |
| Total Rooms | 16 Rooms |
| Building Area | 6,785 sqft Living Area |
| Gross Area | 7,756 sqft Gross Area |
| 1st Floor | 2,192 sqft 1st Floor |
| Upper Floors | 2,606 sqft Upper Floors |
| Basement Area | 2,190 sqft Basement |
| Finished Basement | 1,987 sqft Finished |
| Unfinished Basement | 203 sqft Unfinished |
| Stories | 2 Stories |
| Interior Structure | Wallboard/Drywall Interior Structure |
| Year Built | Built 1987 |
|---|---|
| Effective Year Built | Effective 2015 |
| Architectural Style | A-Frame Style |
| Exterior Material | Wood Shingle Exterior |
| Construction Type | Frame Construction |
| Roof Material | Other (not Classified) Roof |
| Lot Area | 35,311 sqft (0.811 acres) |
| Parking Spaces | 3 Parking Spaces |
| Garage Type | Attached Garage |
| Garage Area | 768 sqft Garage |
| Deck Area | 1,616 sqft Deck |
| Porch | Porch |
| Porch Area | 1,329 sqft Porch |
| Cooling System | Evaporative Cooling |
|---|---|
| Heating System | Hot Water Heating |
| Account Number | R0004105 |
|---|---|
| Street Address | 3633 21ST ST |
| City | BOULDER |
| State | CO |
| Zip | 80304-1607 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | LOT 1 21ST/LINDEN SUB |
| Legal Range | 70 |
| Legal Township | 1N |
| Legal Section | 19 |
| Legal Subdivision | 21ST/LINDEN SUB - BO |
| Legal Block | 1 |
| Legal Lot Number | 1 |
| Jurisdiction | BOULDER CO |
| Minor Civil Division | BOULDER |
| Census Blockgroup | 1 |
| Census Block | 1000 |
| Census Tract | 12103 |
Source: Boulder County records · APN 1463-19-1-31-002
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 | Individual Owner on File |
|---|---|
| Mailing Address | 3633 21ST ST, BOULDER, CO 80304-1607 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Date | Document |
|---|---|
| Jan 20, 2022 | Warranty Deed, Transfer · Conventional Mortgage GUARANTEED RATE AFFINITY LLC |
| Sep 11, 2017 | Warranty Deed, Transfer · Adjustable Rate Mortgage (ARM) RAYMOND JAMES BANK NA |
| Jun 21, 2017 | Grant Deed, Construction Loan · Line of Credit BLUE FCU |
| Deed Names | Verified Name on Deed |
|---|---|
| Known Transactions |
|
| Deed Doc Number | 20223941335 |
| Prior Transfer Date | May 14, 2007 |
| Prior Transfer Doc | 0002857238 |
| Record Refreshed | Sep 20, 2026 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Jan 20, 2022 |
| Property Address | 3633 21ST ST, BOULDER, CO 80304-1607 |
| Document Number | 0003941335 |
| Instrument Date | Jan 14, 2022 |
| Instrument | 3941335 |
| Transaction Type | Transfer |
| Record Updated | Mar 31, 2022 |
| Title Company | LAND TITLE GUARANTY COMPANY IN, LAND TITLE GUARANTEE CO |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $450.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|---|
| Address | 1710 AVENIDA DEL MUNDO, 1710, CORONADO, CA 92118-3045 |
| Name | Verified Name |
|---|---|
| Address | 3633 21ST ST, BOULDER, CO 80304-1607 |
| Document Number | 0003941336 |
|---|---|
| Date | Jan 20, 2022 |
| Instrument | 3941336 |
| Name | GUARANTEED RATE AFFINITY LLC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Feb 01, 2052 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Sep 11, 2017 |
| Property Address | 3633 21ST ST, BOULDER, CO 80304-1607 |
| Document Number | 0003613925 |
| Instrument Date | Sep 07, 2017 |
| Instrument | 3613925 |
| Transaction Type | Transfer |
| Record Updated | Mar 31, 2022 |
| Title Company | LAND TITLE GUARANTEE CO |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $350.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|---|
| Address | 00000 |
| Name | Verified Name |
|---|---|
| Address | 3633 21ST ST, BOULDER, CO 80304-1607 |
| Document Number | 0003613926 |
|---|---|
| Date | Sep 11, 2017 |
| Instrument | 3613926 |
| Name | RAYMOND JAMES BANK NA |
|---|---|
| Type | Bank |
| Type | Adjustable Rate Mortgage (ARM) |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Oct 01, 2047 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 3% |
| Type Change Date | Oct 01, 2024 |
| Change Frequency | Annually |
| Min Rate At Change | 2.87% |
| Max Rate At Change | 5% |
| Index | 1-Year CMT |
| Max Rate | 8% |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Jun 21, 2017 |
| Property Address | 3633 21ST ST, BOULDER, CO 80304-1607 |
| Instrument Date | Jun 16, 2017 |
| Instrument | 3599100 |
| Transaction Type | Construction Loan |
| Record Updated | Jun 28, 2017 |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|---|
| Relationship | Corporate Trust |
| Address | 26201 CATHARINE CT LOS ALTOS HILLS CA 940222647, LOS ALTOS HILLS, CA 94022-2647 |
| Document Number | 0003599100 |
|---|---|
| Date | Jun 21, 2017 |
| Instrument | 3599100 |
| Name | BLUE FCU |
|---|---|
| Address | 4112 KODIAK CT # D, LONGMONT, CO 80504-3517 |
| Type | Line of Credit |
|---|---|
| Amount | Amount Recorded |
| Term | 12 Months |
| Due | Jun 20, 2018 |
| Rate Type | Adjustable Rate |
|---|
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, not market price estimates; both are a fraction of this property's market value.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $338,225 (+8.8%) Land $96,084 Building $242,141 | $4,973,900 (-) Land $1,413,000 Building $3,560,900 | |
| 2025 | $29,641.00 (+1.79%) | $310,869 (-8.8%) Land $88,313 Building $222,556 | $4,973,900 (-2.24%) Land $1,413,000 Building $3,560,900 |
| 2023 | $29,119.00 (+26.96%) | $340,876 (+38.02%) Land $91,897 Building $248,979 | $5,087,700 (+43.17%) Land $1,371,600 Building $3,716,100 |
| 2022 | $22,935.00 | $246,976 Land $71,488 Building $175,488 | $3,553,600 Land $1,028,600 Building $2,525,000 |
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