Google street view image for 1427 Mapleton Ave, Boulder, CO 80304

Off market dec 2020 for $1.2M

—

Est. refi paymentEst. refi $8,394/mo

•

5 ba

•

3,630

sq ft

1427 Mapleton Ave, Boulder, CO 80304

About this home

1427 Mapleton Ave is a 3,630 square foot property on a 5,133 square foot lot with 6 bedrooms and 5 bathrooms. - it last sold on December 16, 2020 for $1,245,000.

1956Year Built

5,133 sq ftLot Size

$343Price/Sq.Ft.

Source:Public Records

Redfin Estimate

Unfortunately, we don't have enough data to generate an accurate Estimate at this time.

Market trends in 80304, CO

Last updated September 2026

Buyer's Market

Seller's Market

Balanced market

Sale-to-list price

97.4%

+0.1% MoM

Median sale price

$1.3M

$110K MoM

Avg. days on market

63d

8 days MoM

Recently sold homes

103

15 MoM

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See all

Provided by Redfin

Sale history for 1427 Mapleton Ave

Year

Property tax

Land + Additions

Assessment*

2025

$10,567 (−5.9%)

$50,988 + $55,600

$106,588

2024

$11,228 (+1.9%)

$50,988 + $55,600

$106,588

2023

$11,021 (+33.8%)

$50,973 + $72,300

$123,273

2022

$8,237 (+2.5%)

$54,659 + $72,300

$126,959

2021

$8,037 (+10.4%)

$34,000 + $50,660

$84,660

2020

$7,282 (+1.6%)

$35,750 + $53,268

$89,018

2019

$7,170 (+9.2%)

$35,893 + $47,762

$83,655

2018

$6,567 (+3.2%)

$35,893 + $47,762

$83,655

2017

$6,362 (+0.1%)

$33,048 + $42,696

$75,744

2016

$6,355 (+5.6%)

$33,048 + $42,696

$75,744

2015

$6,017

$25,074 + $48,341

$73,415

2014

$6,014 (+2.3%)

$29,770 + $40,182

$69,952

2013

$5,882 (+17.6%)

$29,770 + $40,182

$69,952

2012

$5,001 (+0.9%)

$29,770 + $40,182

$69,952

2011

$4,957 (+4.1%)

$33,830 + $25,870

$59,700

2010

$4,761 (+7.1%)

$33,830 + $59,700

$93,530

2009

$4,445

$19,900 + $39,000

$58,900

Tax history for 1427 Mapleton Ave

Year

Property tax

Land + Additions

Assessment*

2025

$10,567 (−5.9%)

$50,988 + $55,600

$106,588

2024

$11,228 (+1.9%)

$50,988 + $55,600

$106,588

2023

$11,021 (+33.8%)

$50,973 + $72,300

$123,273

2022

$8,237 (+2.5%)

$54,659 + $72,300

$126,959

2021

$8,037 (+10.4%)

$34,000 + $50,660

$84,660

2020

$7,282 (+1.6%)

$35,750 + $53,268

$89,018

2019

$7,170 (+9.2%)

$35,893 + $47,762

$83,655

2018

$6,567 (+3.2%)

$35,893 + $47,762

$83,655

2017

$6,362 (+0.1%)

$33,048 + $42,696

$75,744

2016

$6,355 (+5.6%)

$33,048 + $42,696

$75,744

2015

$6,017

$25,074 + $48,341

$73,415

2014

$6,014 (+2.3%)

$29,770 + $40,182

$69,952

2013

$5,882 (+17.6%)

$29,770 + $40,182

$69,952

2012

$5,001 (+0.9%)

$29,770 + $40,182

$69,952

2011

$4,957 (+4.1%)

$33,830 + $25,870

$59,700

2010

$4,761 (+7.1%)

$33,830 + $59,700

$93,530

2009

$4,445

$19,900 + $39,000

$58,900

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Zoning

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

Property details

Interior

Basement Information
Basement Sq. Ft: 1,815
Basement Finish: Finished
Basement Type: Finished

Bathroom Information
# of Full Baths: 5

Heating & Cooling
Heating Type: Forced Air

Room Information
# of Rooms: 16

Exterior

Exterior Information
Physical Condition: Average
Construction Type: Masonry
Building Construction Quality: Average
Exterior Wall: Brick Veneer
Building Type: Multi Family

Property Information
Subdivision Name: BOULDER O T EAST & WEST & NORTH
Living Sq. Ft: 3,630
Ground Floor Sq. Ft: 1,815
Building Sq. Ft: 3,630
# of Stories: 1
Stories Type: 1
Legal Description: LOT 10 & 5 FT STRIP ON S BLK 176 BOULDER & LOT 9 BLK 10 BOULDER NORTH

Lot Information
# of Buildings: 1
Land Sq. Ft: 5,133
Legal Lot Number: 9
Legal Block Number: 10
Municipality Name: BOULDER
Acres: 0.1178
County Use Description: MULTI-RESID 4-8 UNITS

Financial

Assessor Information
Assessment Year: 2025
Tax Area: RE2-BLDR-NCWD-UDFC

Public facts

Beds: 6
Baths: 5.0
Sq. Ft.: 3,630
Stories: 1.0
Lot Size: 5,133 square feet
Style: Other
Year Built: 1956
Year Renovated: 1956
County: Boulder County
APN: R0008324

Home facts updated by county records on Sep 2, 2026

Around this home

Schools

Whittier Elementary School

Public K-5 • Assigned • 0.4mi

6/10

Casey Middle School

Public 6-8 • Assigned • 0.1mi

5/10

Boulder High School

Public 9-12 • Assigned • 0.6mi

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

4/10 Fire Factor

2% chance of being in a wildfire in next 30 years

3/10 Heat Factor

7 days above 90° expected this year, 19 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)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

Try the sun simulator tool to see how light moves across the property at different times of day and year.

Provided by Shadowmap

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New listings for sale in 80304

COMING SOON

$2,950,000

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805 Linden Ave, Boulder, CO 80304

NEW 18 HRS AGO

$1,100,000

3 beds2.5 baths2,208 sq ft

1192 Quince Ave, Boulder, CO 80304

OPEN THU, 12PM TO 2PMVIDEO TOUR

$2,495,000

5 beds4.5 baths5,592 sq ft

1945 Norwood Ave, Boulder, CO 80304

$3,350,000

4 beds3.5 baths3,495 sq ft

645 Concord Ave, Boulder, CO 80304

COMING SOON

$9,500,000

6 beds7.5 baths9,447 sq ft

1080 Juniper Ave, Boulder, CO 80304

$1,600,000

4 beds3 baths3,215 sq ft

626 Poplar Ave, Boulder, CO 80304

$2,350,000

4 beds2.5 baths4,371 sq ft

86 S Cedar Brook Rd, Boulder, CO 80304

VIDEO TOUR

$2,650,000

4 beds1 bath2,179 sq ft

2003 Balsam Dr, Boulder, CO 80304

$949,000

3 beds3 baths1,816 sq ft

1219 Linden Ave, Boulder, CO 80304

Home values near 1427 Mapleton Ave

Data from public records.

Address	Redfin Estimate
1515 Mapleton Avenue, Boulder, CO 3 Beds \| 2 Baths \| 2278 Sq. Ft.	$1,695,804
1443 Mapleton Avenue, Boulder, CO 2 Beds \| 2 Baths \| 1397 Sq. Ft.	$1,401,350

Address	Redfin Estimate
1418 Mapleton Avenue, Boulder, CO 12 Beds \| 8 Baths \| 5457 Sq. Ft.	—
1419 Mapleton Avenue, Boulder, CO 18 Beds \| 6 Baths \| 3784 Sq. Ft.	$3,484,052

Address	Redfin Estimate
1437 Mapleton Avenue, Boulder, CO 4 Beds \| 3.5 Baths \| 2792 Sq. Ft.	$1,624,310
1505 Mapleton Avenue, Boulder, CO 3 Beds \| 2 Baths \| 2982 Sq. Ft.	$2,277,550

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GreatSchools Ratings provided by GreatSchools.org.

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About this home

Redfin Estimate

Market trends in 80304, CO

Sale history for 1427 Mapleton Ave

Tax history for 1427 Mapleton Ave

Zoning

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 80304

Home values near 1427 Mapleton Ave

More real estate resources