Boulder County property record for 821 Mapleton Ave, Boulder, CO 80304 · Last verified June 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 5 Beds |
| Bathrooms | 4.25 Baths |
| Year Built | Built 1990 |
| Square Footage | 5,373 sqft Living Area |
| Lot Size | 8,389 sqft (0.193 acres) |
| Occupancy | Owner Occupied |
| Last Sale | $2,000,000 (2005) |
| Tax Bill | $26,945.00 (2025) |
| Primary APN | 1461-25-4-02-012 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 4.25 Baths |
| Partial Baths | 2 Partial Baths |
| Total Rooms | 10 Rooms |
| Building Area | 5,373 sqft Living Area |
| Gross Area | 5,609 sqft Gross Area |
| 1st Floor | 1,892 sqft 1st Floor |
| Upper Floors | 2,446 sqft Upper Floors |
| Basement Area | 1,271 sqft Basement |
| Finished Basement | 1,035 sqft Finished |
| Unfinished Basement | 236 sqft Unfinished |
| Stories | 2 Stories |
| Interior Structure | Wallboard/Drywall Interior Structure |
| Year Built | Built 1916 |
|---|---|
| Effective Year Built | Effective 1990 |
| Exterior Material | Combination Exterior |
| Construction Type | Masonry/Concrete Masonry Units (CMUs) Construction |
| Roof Material | Asphalt Roof |
| Lot Area | 8,389 sqft (0.193 acres) |
| Parking Spaces | 2 Parking Spaces |
| Garage Type | Detached Garage |
| Garage Area | 564 sqft Garage |
| Deck Area | 369 sqft Deck |
| Porch | Porch |
| Porch Area | 234 sqft Porch |
| Heating System | Forced Air with Air Conditioning Heating |
|---|
| Account Number | R0005794 |
|---|---|
| Street Address | 821 MAPLETON AVE |
| City | BOULDER |
| State | CO |
| Zip | 80304-3993 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | LOTS 17-18 BLK 2 MAPLETON |
| Legal Range | 71 |
| Legal Township | 1N |
| Legal Section | 25 |
| Legal Subdivision | MAPLETON - BO |
| Legal Block | 2 |
| Legal Lot Number | 17 |
| Jurisdiction | BOULDER CO |
| Minor Civil Division | BOULDER |
| Census Blockgroup | 4 |
| Census Block | 4008 |
| Census Tract | 12101 |
Source: Boulder County records · APN 1461-25-4-02-012
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 | 821 MAPLETON AVE, BOULDER, CO 80304-3993 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Vesting | Joint Tenants |
| Date | Document |
|---|---|
| Jul 20, 2026 | Special Warranty Deed, Transfer NONE LISTED ON DOCUMENT |
| Apr 13, 2026 | Deed of Trust, Mortgage · Line of Credit NONE LISTED ON DOCUMENT |
| Jul 17, 2023 | Deed of Trust, Mortgage · Conventional Mortgage ROCKET MORTGAGE LLC |
| Apr 18, 2022 | Deed of Trust, Mortgage · Conventional Mortgage ROCKET MORTGAGE LLC |
| May 10, 2021 | Deed of Trust, Mortgage · Conventional Mortgage ROYAL UNITED MORTGAGE LLC |
| May 29, 2020 | Deed of Trust, Mortgage · Conventional Mortgage ROYAL UNITED MORTGAGE LLC |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Known Transactions |
|
| Deed Doc Number | 20052717403 |
| Record Refreshed | Sep 20, 2026 |
| Document Type | Special Warranty Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Jul 20, 2026 |
| Property Address | 821 MAPLETON AVE, BOULDER, CO 80304-3993 |
| Document Number | 0004140395 |
| Instrument Date | Jul 16, 2026 |
| Instrument | 20264140395 |
| Transaction Type | Transfer |
| Record Updated | Jul 30, 2026 |
| Title Company | NONE LISTED ON DOCUMENT |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Full Amount Stated |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Revocable Trust |
| Address | 821 MAPLETON AVE, BOULDER, CO 80304-3993 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Apr 13, 2026 |
| Property Address | 821 MAPLETON AVE, BOULDER, CO 80304-3993 |
| Document Number | 0004127483 |
| Instrument Date | Mar 30, 2026 |
| Instrument | 20264127483 |
| Transaction Type | Mortgage |
| Record Updated | Jul 12, 2026 |
| Title Company | NONE LISTED ON DOCUMENT |
| Name | Verified Name |
|---|---|
| Address | 821 MAPLETON AVE, BOULDER, CO 80304-3993 |
| Document Number | 0004127483, |
|---|---|
| Date | Apr 13, 2026 |
| Instrument | 20264127483 |
| Type | Line of Credit |
|---|---|
| Amount | Amount Recorded |
| Term | 240 Months |
| Due | Apr 24, 2046 |
| Rate | 5.98% |
|---|---|
| Max Rate | -1% |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BOULDER CO |
| Property Address | 821 MAPLETON AVE, BOULDER, CO 80304-3993 |
| Transaction Type | Mortgage |
| Record Updated | Aug 07, 2023 |
| Name | Verified Name |
|---|---|
| Address | 821 MAPLETON AVE, BOULDER, CO 80304-3993 |
| Document Number | 0004014602 |
|---|---|
| Date | Jul 17, 2023 |
| Instrument | 4014602 |
| Name | ROCKET MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Address | DETROIT, MI 48226 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Aug 01, 2053 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BOULDER CO |
| Property Address | 821 MAPLETON AVE, BOULDER, CO 80304-3993 |
| Transaction Type | Mortgage |
| Record Updated | May 02, 2022 |
| Name | Verified Name |
|---|
| Document Number | 0003957061 |
|---|---|
| Date | Apr 18, 2022 |
| Instrument | 3957061 |
| Name | ROCKET MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Address | DETROIT, MI 48226 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 97 Months |
| Due | May 01, 2030 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BOULDER CO |
| Property Address | 821 MAPLETON AVE, BOULDER, CO 80304-3993 |
| Transaction Type | Mortgage |
| Record Updated | May 26, 2021 |
| Title Company | TIMIOS INC |
| Name | Verified Name |
|---|
| Document Number | 0003883754 |
|---|---|
| Date | May 10, 2021 |
| Instrument | 3883754 |
| Name | ROYAL UNITED MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Address | INDIANAPOLIS, IN 46250 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | May 01, 2051 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BOULDER CO |
| Property Address | 821 MAPLETON AVE, BOULDER, CO 80304-3993 |
| Transaction Type | Mortgage |
| Record Updated | Feb 05, 2021 |
| Name | Verified Name |
|---|
| Document Number | 0003787090 |
|---|---|
| Date | May 29, 2020 |
| Instrument | 3787090 |
| Name | ROYAL UNITED MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Address | INDIANAPOLIS, IN 46250 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Jun 01, 2050 |
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 | $314,269 (+8.8%) Land $122,495 Building $191,774 | $4,621,600 (-) Land $1,801,400 Building $2,820,200 | |
| 2025 | $26,945.00 (+2.5%) | $288,851 (-6.68%) Land $112,588 Building $176,263 | $4,621,600 (+0.04%) Land $1,801,400 Building $2,820,200 |
| 2024 | $26,289.00 (+1.77%) | ||
| 2023 | $25,832.00 (+3.72%) | $309,520 (+12.49%) Land $119,515 Building $190,005 | $4,619,700 (+16.69%) Land $1,783,800 Building $2,835,900 |
| 2022 | $24,906.00 | $275,150 Land $87,097 Building $188,053 | $3,959,000 Land $1,253,200 Building $2,705,800 |
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