Google street view image for 424 Mapleton Ave, Boulder, CO 80304

Off market jan 1990 for $280K

$2,847,438

Est. refi paymentEst. refi $1,932/mo

•

3.5 ba

•

2,966

sq ft

424 Mapleton Ave, Boulder, CO 80304

About this home

424 Mapleton Ave is a 2,966 square foot house on a 0.4 acre lot with 3 bedrooms and 3.5 bathrooms. - it last sold on January 04, 1990 for $280,000. Based on Redfin's Boulder data, we estimate the home's value is $2,847,438.

Single-familyProperty Type

1920Year Built

0.4 acresLot Size

$960Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$2,847,438

$2.6M since sold in January 1990$39K since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 21.8% higher than the average sale price ($2.34M) of 6 comparable homes.

SOLD AUG 27, 2026
$3,295,000
A
4 beds3 baths2,463 sq ft
1013 Mapleton Ave, Boulder, CO 80304
SOLD MAY 29, 2026
$3,200,000
B
3 beds3.5 baths2,384 sq ft
615 Spruce St, Boulder, CO 80302
SOLD AUG 5, 2026
$2,215,000
C
3 beds2 baths2,104 sq ft
3133 5th St, Boulder, CO 80304
SOLD JUN 12, 2026
$1,544,000
D
4 beds3 baths2,484 sq ft
1020 Portland Pl, Boulder, CO 80304
SOLD AUG 14, 2026
$2,100,000
E
5 beds4 baths3,034 sq ft
320 Pearl St, Boulder, CO 80302
SOLD JUN 18, 2026
$1,675,000
F
3 beds3.5 baths2,224 sq ft
804 Dewey Ave, Boulder, CO 80304

Claim this home to receive a free report every month with insights on the changing estimate.

Earn from this home

Sell

$2,681,910

Est. take-home

List your home with Redfin and save $28,474

Refinance

Est. cash available

Get cash now or lower your monthly rate

Rent

$6,490/mo

Redfin rental estimate

List your home for rent

Market trends in 80302, CO

Last updated August 2026

Buyer's Market

Seller's Market

Buyer's market

Sale-to-List Price

95.3%

0.4% MoM

Median sale price

$1.1M

$64K MoM

Avg. days on market

64d

4 days MoM

Recently sold homes

4 MoM

New listings for sale

VIDEO TOUR
$6,895,000
5 beds3.5 baths4,578 sq ft
700 Utica Ave, Boulder, CO 80304
$579,000
3 beds2 baths1,376 sq ft
2996 Shady Holw W, Boulder, CO 80304
COMING SOON
$899,000
4 beds3 baths1,936 sq ft
4009 Wonderland Hill Ave, Boulder, CO 80304
$2,250,000
5 beds3.5 baths3,926 sq ft
3979 Springleaf Ln, Boulder, CO 80304
$575,500
2 beds2 baths923 sq ft
3025 Broadway St #5, Boulder, CO 80304
$549,000
2 beds1 bath888 sq ft
4742 18th St, Boulder, CO 80304
$875,000
3 beds2.5 baths1,512 sq ft
1749 Alpine Ave #10, Boulder, CO 80304
COMING SOON
$5,750,000
4 beds5.5 baths4,226 sq ft
1145 Timber Ln, Boulder, CO 80304
3D WALKTHROUGH
$749,500
3 beds3 baths1,810 sq ft
3140 Eastwood Ct, Boulder, CO 80304
Cassidy Bednark • Century 21 Elevated Real Estate
$1,485,000
4 beds2.5 baths3,623 sq ft
1461 Zamia Ave, Boulder, CO 80304
See all

Provided by Redfin

Sale history for 424 Mapleton Ave

Year

Property tax

Land + Additions

Assessment*

2025

$18,877 (+1.1%)

$163,119 + $41,106

$204,225

2024

$18,676 (+1.8%)

$163,119 + $41,106

$204,225

2023

$18,352 (+9.7%)

$163,527 + $55,684

$219,211

2022

$16,737 (+4.9%)

$167,212 + $55,684

$222,896

2021

$15,959 (+13.2%)

$126,184 + $60,993

$187,177

2020

$14,092 (+1.6%)

$129,815 + $62,748

$192,563

2019

$13,877 (+8.2%)

$121,121 + $47,926

$169,047

2018

$12,829 (+3.2%)

$121,121 + $47,926

$169,047

2017

$12,427 (+10.4%)

$109,584 + $45,583

$155,167

2016

$11,254 (+5.6%)

$109,584 + $45,583

$155,167

2015

$10,657 (+20.8%)

$96,077 + $41,893

$137,970

2014

$8,821 (+2.2%)

$47,362 + $63,202

$110,564

2013

$8,627 (+3.3%)

$47,362 + $63,202

$110,564

2012

$8,355 (−6.6%)

$47,362 + $63,202

$110,564

2011

$8,943 (+11.4%)

$44,496 + $63,202

$107,698

2010

$8,029 (+7.1%)

$44,496 + $63,202

$107,698

2009

$7,497

$51,740 + $47,600

$99,340

Tax history for 424 Mapleton Ave

Year

Property tax

Land + Additions

Assessment*

2025

$18,877 (+1.1%)

$163,119 + $41,106

$204,225

2024

$18,676 (+1.8%)

$163,119 + $41,106

$204,225

2023

$18,352 (+9.7%)

$163,527 + $55,684

$219,211

2022

$16,737 (+4.9%)

$167,212 + $55,684

$222,896

2021

$15,959 (+13.2%)

$126,184 + $60,993

$187,177

2020

$14,092 (+1.6%)

$129,815 + $62,748

$192,563

2019

$13,877 (+8.2%)

$121,121 + $47,926

$169,047

2018

$12,829 (+3.2%)

$121,121 + $47,926

$169,047

2017

$12,427 (+10.4%)

$109,584 + $45,583

$155,167

2016

$11,254 (+5.6%)

$109,584 + $45,583

$155,167

2015

$10,657 (+20.8%)

$96,077 + $41,893

$137,970

2014

$8,821 (+2.2%)

$47,362 + $63,202

$110,564

2013

$8,627 (+3.3%)

$47,362 + $63,202

$110,564

2012

$8,355 (−6.6%)

$47,362 + $63,202

$110,564

2011

$8,943 (+11.4%)

$44,496 + $63,202

$107,698

2010

$8,029 (+7.1%)

$44,496 + $63,202

$107,698

2009

$7,497

$51,740 + $47,600

$99,340

*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

RL-1

Residential-Low 1 District

Primarily single-family detached dwelling units with some duplexes and attached dwelling units at low to very low residential densities.

Permitted uses

Include but are not limited to:

Religious facility
Housing-Multiple units
Educational/school
Recreation
Agriculture-Cropland
Park & open space

Property details

Interior

Basement Information
Basement Sq. Ft: 950
Basement Finish: Finished
Basement Type: Finished

Bathroom Information
# of Full Baths: 2
# of 1/2 Baths: 1
# of 3/4 Baths: 1

Heating & Cooling
Heating Type: Hot Water

Room Information
# of Rooms: 7

Exterior

Exterior Information
Physical Condition: Very Good
Construction Type: Masonry
Building Construction Quality: Good
Exterior Wall: Block/Brick
Building Type: Single Family

Property Information
Subdivision Name: MAPLETON
Living Sq. Ft: 2,966
Ground Floor Sq. Ft: 1,608
Building Sq. Ft: 4,036
Stories Type: 2 Plus
Legal Description: LOTS 24-28 INC BLK 5 MAPLETON SPLIT & COMBINED ON ID 8125

Parking & Garage Information
Parking Type: Attached Garage
Garage/Parking Sq. Ft: 264
Garage / Carport Type: Attached

Lot Information
# of Buildings: 1
Land Sq. Ft: 17,609
Legal Lot Number: 24
Legal Block Number: 5
Municipality Name: BOULDER
Acres: 0.4042
County Use Description: 1 FAMILY RESID

Financial

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

Public facts

Beds: 3
Baths: 3.5
Sq. Ft.: 2,966
Stories: —
Lot Size: 0.4 acres
Style: Single Family Residential
Year Built: 1920
Year Renovated: 1980
County: Boulder County
APN: R0005407

Home facts updated by county records on Sep 2, 2026

Around this home

Schools

Whittier Elementary School

Public K-5 • Assigned • 1.1mi

6/10

Casey Middle School

Public 6-8 • Assigned • 0.6mi

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

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

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

$2.71M – $3.28M

Reach more buyers when you sell with Redfin. Save up to $28,474 in fees. 3 minutes to get started.

Need the cash from your home fast? Sell to .

Nearby similar homes

$1,165,000

2 beds2 baths1,603 sq ft

2718 Pine St #205, Boulder, CO 80302

$3,750,000

5 beds3 baths3,661 sq ft

740 Flagstaff Rd, Boulder, CO 80302

Vincent Pallone • MB Pallone & Associates

3D WALKTHROUGH

$863,000

3 beds1 bath1,259 sq ft

1950 Edgewood Dr, Boulder, CO 80304

Tara Jones • Opendoor Brokerage LLC

NEW CONSTRUCTION

$2,595,000

4 beds3.5 baths2,699 sq ft

2445 Bluff St, Boulder, CO 80304

VIDEO TOUR

$2,195,000

5 beds4 baths4,069 sq ft

541 Arapahoe Ave, Boulder, CO 80302

$3,750,000

5 beds5.5 baths3,705 sq ft

3716 Wonderland Hill Ave, Boulder, CO 80304

New listings for sale in 80304

VIDEO TOUR

$6,895,000

5 beds3.5 baths4,578 sq ft

700 Utica Ave, Boulder, CO 80304

$579,000

3 beds2 baths1,376 sq ft

2996 Shady Holw W, Boulder, CO 80304

COMING SOON

$899,000

4 beds3 baths1,936 sq ft

4009 Wonderland Hill Ave, Boulder, CO 80304

$2,250,000

5 beds3.5 baths3,926 sq ft

3979 Springleaf Ln, Boulder, CO 80304

$575,500

2 beds2 baths923 sq ft

3025 Broadway St #5, Boulder, CO 80304

$549,000

2 beds1 bath888 sq ft

4742 18th St, Boulder, CO 80304

$875,000

3 beds2.5 baths1,512 sq ft

1749 Alpine Ave #10, Boulder, CO 80304

COMING SOON

$5,750,000

4 beds5.5 baths4,226 sq ft

1145 Timber Ln, Boulder, CO 80304

3D WALKTHROUGH

$749,500

3 beds3 baths1,810 sq ft

3140 Eastwood Ct, Boulder, CO 80304

Cassidy Bednark • Century 21 Elevated Real Estate

Home values near 424 Mapleton Ave

Data from public records.

Address	Redfin Estimate
403 Mapleton Avenue, Boulder, CO 3 Beds \| 2 Baths \| 3254 Sq. Ft.	$1,973,236
456 Mapleton Avenue, Boulder, CO 5 Beds \| 3.5 Baths \| 3683 Sq. Ft.	$2,381,977

Address	Redfin Estimate
332 Mapleton Avenue, Boulder, CO 5 Beds \| 3.5 Baths \| 4095 Sq. Ft.	$2,511,517
409 Mapleton Avenue, Boulder, CO 4 Beds \| 2 Baths \| 2414 Sq. Ft.	$1,642,796

Address	Redfin Estimate
502 Mapleton Avenue, Boulder, CO 5 Beds \| 4 Baths \| 4508 Sq. Ft.	$3,269,552
400 Mapleton Avenue, Boulder, CO 4 Beds \| 3.5 Baths \| 3476 Sq. Ft.	$3,120,906

Download the Redfin App on the Apple App Store

Download the Redfin App from the Google Play Store

Join us

Become an Agent

Get referrals

Careers

Find homes faster

About us

Find us

Subsidiaries

Affiliated Business

Countries

United States

Canada

Updated September 2025: By searching, you agree to the Terms of Use, and Privacy Policy.

Do not sell or share my personal information.

REDFIN and all REDFIN variants, WALK SCORE, and the R logos, are trademarks of Redfin Corporation, registered or pending in the USPTO.

California DRE #01521930

Redfin is licensed to do business in New York as Redfin Real Estate. NY Standard Operating Procedures

New Mexico Real Estate Licenses

TREC: Info About Brokerage Services, Consumer Protection Notice

All mortgage lending products and information are provided by Rocket Mortgage, LLC | NMLS #3030; www.NMLSConsumerAccess.org. Licensed in 50 states. This site is not authorized by the New York State Department of Financial Services for mortgage solicitation or loan applications activities related to properties located in the State of New York.

Redfin Corporation is an affiliated business of Rocket Limited Partnership. Each company, and their subsidiaries, are separate legal entities operated and managed through its own management and governance structures.

If you are using a screen reader, or having trouble reading this website, please call Redfin Customer Support for help at 1-844-759-7732.

REDFIN IS COMMITTED TO AND ABIDES BY THE FAIR HOUSING ACT AND EQUAL OPPORTUNITY ACT. READ REDFIN'S FAIR HOUSING POLICY AND THE NEW YORK STATE FAIR HOUSING NOTICE.

GreatSchools Ratings provided by GreatSchools.org.

80026 homes for sale
80027 homes for sale
80302 homes for sale
80303 homes for sale
80305 homes for sale

Houses for rent in Boulder	Agents near me	Fort Collins, CO homes for sale	Boulder Housing Market
Houses for sale near me	Denver, CO homes for sale	Aurora, CO homes for sale
Land for sale near me	Colorado Springs, CO homes for sale	Arvada, CO homes for sale
Open Houses near me	Boulder, CO homes for sale	Boulder Property Records
Condos for sale near me	Littleton, CO homes for sale	CO New Listings

Denver homes for sale
Arvada homes for sale
Golden homes for sale

About this home

Redfin Estimate

Earn from this home

Market trends in 80302, CO

Sale history for 424 Mapleton Ave

Tax history for 424 Mapleton Ave

Zoning and permits

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 424 Mapleton Ave

More real estate resources