Boulder County property record for 403 Mapleton Ave, Boulder, CO 80304 · Last verified June 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 3 Beds |
| Bathrooms | 2 Baths |
| Year Built | Built 1988 |
| Square Footage | 2,747 sqft Living Area |
| Lot Size | 6,275 sqft (0.144 acres) |
| Occupancy | Owner Occupied |
| Last Sale | $827,000 (2011) |
| Tax Bill | $14,034.00 (2025) |
| Primary APN | 1461-25-4-06-011 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 8 Rooms |
| Building Area | 2,747 sqft Living Area |
| Gross Area | 3,254 sqft Gross Area |
| 1st Floor | 1,483 sqft 1st Floor |
| Upper Floors | 964 sqft Upper Floors |
| Basement Area | 600 sqft Basement |
| Finished Basement | 300 sqft Finished |
| Unfinished Basement | 300 sqft Unfinished |
| Stories | 2 Stories |
| Interior Structure | Plaster Interior Structure |
| Year Built | Built 1917 |
|---|---|
| Effective Year Built | Effective 1988 |
| Exterior Material | Combination Exterior |
| Construction Type | Masonry/Concrete Masonry Units (CMUs) Construction |
| Roof Material | Asphalt Roof |
| Lot Area | 6,275 sqft (0.144 acres) |
| Parking Spaces | 1 Parking Spaces |
| Garage Type | Attached Garage |
| Garage Area | 207 sqft Garage |
| Porch | Porch |
| Porch Area | 118 sqft Porch |
| Cooling System | Central Cooling |
|---|---|
| Heating System | Forced Air with Air Conditioning Heating |
| Account Number | R0000911 |
|---|---|
| Street Address | 403 MAPLETON AVE |
| City | BOULDER |
| State | CO |
| Zip | 80304-3984 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | S 120 FT LOTS 31 & 32 BLK 4 MAPLETON |
| Legal Range | 71 |
| Legal Township | 1N |
| Legal Section | 25 |
| Legal Subdivision | MAPLETON - BO |
| Legal Block | 4 |
| Legal Lot Number | 31 |
| Jurisdiction | BOULDER CO |
| Minor Civil Division | BOULDER |
| Census Blockgroup | 4 |
| Census Block | 4004 |
| Census Tract | 12101 |
Source: Boulder County records · APN 1461-25-4-06-011
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 Individual Names on File |
|---|---|
| Mailing Address | 403 MAPLETON AVE, BOULDER, CO 80304-3984 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Vesting | Joint Tenants |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Known Transactions |
|
| Deed Doc Number | 20113158506 |
| Prior Transfer Date | Mar 06, 2008 |
| Prior Transfer Doc | 0002915816 |
| 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 | $160,140 (+8.8%) Land $105,944 Building $54,196 | $2,355,000 (-) Land $1,558,000 Building $797,000 | |
| 2025 | $14,034.00 (+5.28%) | $147,188 (-6.87%) Land $97,375 Building $49,813 | $2,355,000 (-0.17%) Land $1,558,000 Building $797,000 |
| 2023 | $13,330.00 (+9.59%) | $158,047 (+20.65%) Land $99,817 Building $58,230 | $2,358,900 (+25.15%) Land $1,489,800 Building $869,100 |
| 2022 | $12,164.00 | $130,994 Land $75,324 Building $55,670 | $1,884,800 Land $1,083,800 Building $801,000 |
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