2321 Mapleton Ave is a 1,892 square foot house on a 4,868 square foot lot with 2 bedrooms and 3.5 bathrooms. - it last sold on October 06, 1989 for $160,000. Based on Redfin's Boulder data, we estimate the home's value is $1,435,610.
Single-familyProperty Type
1985Year Built
4,868 sq ftLot Size
$759Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,435,610
$1.3M since sold in October 1989$4,000 since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 10.7% higher than the average sale price ($1.30M) of 6 comparable homes.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning and permits
Zoning
Permits
RMX-1
Residential-Mixed 1 District
Mixed density residential areas with a variety of single-family, detached, duplexes, and multi-family units that will be maintained; and where existing structures may be renovated or rehabilitated.
Permitted uses
Include but are not limited to:
Religious facility
Housing-Single unit
Housing-Multiple units
Educational/school
Recreation
Agriculture-Cropland
Park & open space
Feb 3, 2026 • Final
Mechanical - hvac with electrical
Electrical
HVAC
Permit history is from public records and may be incomplete or inaccurate. Redfin and its agents make no representations about the property condition or permit status. Buyers should independently verify all information.
Property details
Interior
Basement Information
Basement Sq. Ft: 600
Basement Finish: Finished
Basement Type: Finished
Bathroom Information
# of Full Baths: 3
# of 1/2 Baths: 1
Heating & Cooling
Heating Type: Forced Air
Room Information
# of Rooms: 6
Exterior
Exterior Information
Physical Condition: Good
Construction Type: Frame
Building Construction Quality: Good
Exterior Wall: Frame Wood
Roof Covering Type: Asphalt
Roof Shape Type: Asphalt
Building Type: Single Family
Property Information
Subdivision Name: MAPLETON GARDEN
Living Sq. Ft: 1,892
Ground Floor Sq. Ft: 628
Building Sq. Ft: 2,132
Stories Type: 2 Plus
Legal Description: LOT 4 & UND 1/4 INT IN OUTLOT A MAPLETON GARDEN
Parking & Garage Information
Parking Type: Attached Garage
Garage/Parking Sq. Ft: 240
Garage / Carport Type: Attached
Lot Information
# of Buildings: 1
Land Sq. Ft: 4,868
Legal Lot Number: 4
Municipality Name: BOULDER
Acres: 0.1118
County Use Description: 1 FAMILY RESID
Financial
Assessor Information
Assessment Year: 2025
Tax Area: RE2-BLDR-NCWD-UDFC
Public facts
Beds: 2
Baths: 3.5
Sq. Ft.: 1,892
Stories: —
Lot Size: 4,868 square feet
Style: Single Family Residential
Year Built: 1985
Year Renovated: 1985
County: Boulder County
APN: R0100751
Home facts updated by county records on Sep 2, 2026
Around this home
Schools
Whittier Elementary School
Public K-5 • Assigned • 0.3mi
6/10
Casey Middle School
Public 6-8 • Assigned • 0.7mi
5/10
Boulder High School
Public 9-12 • Assigned • 0.9mi
9/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
3/10 Fire Factor
0.15% chance of being in a wildfire in next 30 years
3/10 Heat Factor
7 days above 91° expected this year, 18 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
2/10 Air Factor
2 unhealthy days expected this year, 2 days in 30 years
Provided by First Street
Historical weather
Boulder, CO • 80304
Average low and high temperatures (°F)
44
22
51
29
63
40
64
40
70
47
83
57
90
64
84
60
76
53
67
45
54
33
53
33
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 10.5 hours in
June and 6 hours in December, placing it above the
U.S. average for solar exposure.
10.5 hrs
6 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$1.36M – $1.65M
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