Boulder County property record for 312 Mapleton Ave, Boulder, CO 80304 · Last verified June 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 3 Beds |
| Bathrooms | 2 Baths |
| Year Built | Built 1984 |
| Square Footage | 2,086 sqft Living Area |
| Lot Size | 6,287 sqft (0.144 acres) |
| Occupancy | Owner Occupied |
| Last Sale | $186,500 (1990) |
| Tax Bill | $8,970.00 (2025) |
| Primary APN | 1461-25-3-04-007 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 8 Rooms |
| Building Area | 2,086 sqft Living Area |
| Gross Area | 2,398 sqft Gross Area |
| 1st Floor | 1,082 sqft 1st Floor |
| Basement Area | 1,004 sqft Basement |
| Finished Basement | 1,004 sqft Finished |
| Stories | 1 Stories |
| Interior Structure | Wallboard/Drywall Interior Structure |
| Year Built | Built 1952 |
|---|---|
| Effective Year Built | Effective 1984 |
| Architectural Style | Ranch Style |
| Exterior Material | Wood Shingle Exterior |
| Construction Type | Frame Construction |
| Roof Material | Asphalt Roof |
| Lot Area | 6,287 sqft (0.144 acres) |
| Parking Spaces | 1 Parking Spaces |
| Garage Type | Attached Garage |
| Garage Area | 312 sqft Garage |
| Deck Area | 384 sqft Deck |
| Porch | Porch |
| Porch Area | 56 sqft Porch |
| Heating System | Forced Air with Air Conditioning Heating |
|---|
| Account Number | R0000907 |
|---|---|
| Street Address | 312 MAPLETON AVE |
| City | BOULDER |
| State | CO |
| Zip | 80304-3978 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | LOTS 12-13 BLK 1 MAPLETON PARK |
| Legal Range | 71 |
| Legal Township | 1N |
| Legal Section | 25 |
| Legal Subdivision | MAPLETON PARK - BO |
| Legal Block | 1 |
| Legal Lot Number | 12 |
| Jurisdiction | BOULDER CO |
| Minor Civil Division | BOULDER |
| Census Blockgroup | 1 |
| Census Block | 1016 |
| Census Tract | 12101 |
Source: Boulder County records · APN 1461-25-3-04-007
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 | 312 MAPLETON AVE, BOULDER, CO 80304-3978 |
| 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 | 19901079343 |
| 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, not market price estimates; both are a fraction of this property's market value.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $109,154 (+8.8%) Land $93,704 Building $15,450 | $1,605,200 (-) Land $1,378,000 Building $227,200 | |
| 2025 | $8,970.00 (-0.01%) | $100,325 (-6.74%) Land $86,125 Building $14,200 | $1,605,200 (-0.02%) Land $1,378,000 Building $227,200 |
| 2023 | $8,971.00 (+7.7%) | $107,575 (+19.92%) Land $89,874 Building $17,701 | $1,605,600 (+24.4%) Land $1,341,400 Building $264,200 |
| 2022 | $8,330.00 | $89,704 Land $75,401 Building $14,303 | $1,290,700 Land $1,084,900 Building $205,800 |
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