Google street view image for 312 Mapleton Ave, Boulder, CO 80304

Off Market Dec 1990 for $186K

$1,629,880

Est. refi paymentEst. refi $1,274/mo

•

2 ba

•

2,086

sq ft

312 Mapleton Ave, Boulder, CO 80304

About this home

312 Mapleton Ave is a 2,086 square foot house on a 6,287 square foot lot with 3 bedrooms and 2 bathrooms. - it last sold on December 19, 1990 for $186,500. Based on Redfin's Boulder data, we estimate the home's value is $1,629,880.

Single-familyProperty Type

1952Year Built

6,287 sq ftLot Size

$781Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$1,629,880

$1.4M since sold in December 1990$74K since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 16.7% higher than the average sale price ($1.40M) of 6 comparable homes.

SOLD JUN 11, 2026
$1,583,000
A
3 beds2 baths2,080 sq ft
300 Forest Ave, Boulder, CO 80304
SOLD JUN 1, 2026
3010 10th St, Boulder, CO 80304
$1,400,000
B
2 beds2 baths2,020 sq ft
3010 10th St, Boulder, CO 80304
SOLD SEP 9, 2026
$1,080,000
C
3 beds2 baths1,549 sq ft
3011 13th St, Boulder, CO 80304
SOLD JUL 22, 2026
$1,620,000
D
3 beds3 baths2,538 sq ft
315 Evergreen Ave, Boulder, CO 80304
SOLD SEP 1, 2026
$1,350,000
E
4 beds2 baths1,974 sq ft
3190 8th St, Boulder, CO 80304
SOLD MAY 27, 2026
$1,350,000
F
3 beds2 baths1,634 sq ft
3134 11th St, Boulder, CO 80304

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

Earn from this home

Sell

$1,534,240

Est. take-home

List your home with Redfin and save $16,299

Refinance

Est. cash available

Get cash now or lower your monthly rate

Rent

$4,580/mo

Redfin rental estimate

List your home for rent

Market trends in 80304, CO

Last updated August 2026

Buyer's Market

Seller's Market

Balanced market

Sale-to-List Price

97.3%

+0.1% MoM

Median sale price

$1.5M

$2K MoM

Avg. days on market

72d

9 days MoM

Recently sold homes

120

8 MoM

New listings for sale

$1,295,000
3 beds2 baths1,890 sq ft
3065 23rd St, Boulder, CO 80304
3D WALKTHROUGH
$1,600,000
3 beds3.5 baths3,392 sq ft
2748 Winding Trail Dr, Boulder, CO 80304
$1,069,500
4 beds2 baths1,812 sq ft
2445 Forest Ave, Boulder, CO 80304
3D WALKTHROUGH
$2,695,000
5 beds3.5 baths3,513 sq ft
3560 16th St, Boulder, CO 80304
$1,549,000
4 beds3 baths3,968 sq ft
3540 19th St, Boulder, CO 80304
Jennifer Crow • RE/MAX Professionals
3D WALKTHROUGH
$820,000
3 beds1.5 baths1,400 sq ft
3565 19th St, Boulder, CO 80304
FOR SALE BY OWNER
$750,000
3 beds2 baths1,552 sq ft
1683 Yellow Pine Ave, Boulder, CO 80304
$1,741,337
3 beds3.5 baths1,999 sq ft
1150 Violet Ave, Boulder, CO 80304
$695,000
2 beds2.5 baths1,368 sq ft
4555 13th St Unit 2A, Boulder, CO 80304
3D & VIDEO TOUR
$1,599,000
3 beds3 baths2,220 sq ft
1969 Joslyn Ct, Boulder, CO 80304
See all

Provided by Redfin

Sale history for 312 Mapleton Ave

Year

Property tax

Land + Additions

Assessment*

2025

$8,970 (−1.8%)

$86,125 + $14,200

$100,325

2024

$9,130 (+1.8%)

$86,125 + $14,200

$100,325

2023

$8,972 (+7.7%)

$86,189 + $17,701

$103,890

2022

$8,330 (+4.9%)

$89,874 + $17,701

$107,575

2021

$7,943 (+10.1%)

$75,401 + $14,303

$89,704

2020

$7,216 (+1.6%)

$77,570 + $14,715

$92,285

2019

$7,106 (+7.2%)

$63,421 + $19,484

$82,905

2018

$6,630 (+3.2%)

$63,421 + $19,484

$82,905

2017

$6,423 (+12.5%)

$59,256 + $17,215

$76,471

2016

$5,710 (+5.6%)

$59,256 + $17,215

$76,471

2015

$5,407 (+23.0%)

$52,138 + $13,834

$65,972

2014

$4,396 (+2.2%)

$17,592 + $33,543

$51,135

2013

$4,299 (−7.1%)

$17,592 + $33,543

$51,135

2012

$4,628 (+0.9%)

$17,592 + $33,543

$51,135

2011

$4,587 (+0.3%)

$23,402 + $31,840

$55,242

2010

$4,575 (+7.1%)

$23,402 + $31,840

$55,242

2009

$4,272

$46,570 + $10,030

$56,600

Tax history for 312 Mapleton Ave

Year

Property tax

Land + Additions

Assessment*

2025

$8,970 (−1.8%)

$86,125 + $14,200

$100,325

2024

$9,130 (+1.8%)

$86,125 + $14,200

$100,325

2023

$8,972 (+7.7%)

$86,189 + $17,701

$103,890

2022

$8,330 (+4.9%)

$89,874 + $17,701

$107,575

2021

$7,943 (+10.1%)

$75,401 + $14,303

$89,704

2020

$7,216 (+1.6%)

$77,570 + $14,715

$92,285

2019

$7,106 (+7.2%)

$63,421 + $19,484

$82,905

2018

$6,630 (+3.2%)

$63,421 + $19,484

$82,905

2017

$6,423 (+12.5%)

$59,256 + $17,215

$76,471

2016

$5,710 (+5.6%)

$59,256 + $17,215

$76,471

2015

$5,407 (+23.0%)

$52,138 + $13,834

$65,972

2014

$4,396 (+2.2%)

$17,592 + $33,543

$51,135

2013

$4,299 (−7.1%)

$17,592 + $33,543

$51,135

2012

$4,628 (+0.9%)

$17,592 + $33,543

$51,135

2011

$4,587 (+0.3%)

$23,402 + $31,840

$55,242

2010

$4,575 (+7.1%)

$23,402 + $31,840

$55,242

2009

$4,272

$46,570 + $10,030

$56,600

*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: 1,004
Basement Finish: Finished
Basement Type: Finished

Bathroom Information
# of Full Baths: 2

Heating & Cooling
Heating Type: Forced Air

Room Information
# of Rooms: 8

Exterior

Exterior Information
Physical Condition: Average
Building Style Type: Ranch
Construction Type: Frame
Building Construction Quality: Average
Exterior Wall: Frame Wood
Roof Covering Type: Asphalt
Roof Shape Type: Asphalt
Building Type: Single Family

Property Information
Subdivision Name: MAPLETON PARK
Living Sq. Ft: 2,086
Ground Floor Sq. Ft: 1,082
Building Sq. Ft: 2,086
# of Stories: 1
Stories Type: 1
Legal Description: LOTS 12-13 BLK 1 MAPLETON PARK

Parking & Garage Information
Parking Type: Basement Garage
Garage/Parking Sq. Ft: 312
Garage / Carport Type: Basement

Lot Information
# of Buildings: 1
Land Sq. Ft: 6,287
Legal Lot Number: 12
Legal Block Number: 1
Municipality Name: BOULDER
Acres: 0.1443
County Use Description: 1 FAMILY RESID

Financial

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

Public facts

Beds: 3
Baths: 2.0
Sq. Ft.: 2,086
Stories: 1.0
Lot Size: 6,287 square feet
Style: Single Family Residential
Year Built: 1952
Year Renovated: 1984
County: Boulder County
APN: R0000907

Home facts updated by county records on Sep 2, 2026

Around this home

Schools

Whittier Elementary School

Public K-5 • Assigned • 1.2mi

6/10

Casey Middle School

Public 6-8 • Assigned • 0.7mi

5/10

Boulder High School

Public 9-12 • Assigned • 1.0mi

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

3% chance of being in a wildfire in next 30 years

3/10 Heat Factor

8 days above 90° expected this year, 20 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

$1.55M – $1.88M

Reach more buyers when you sell with Redfin. Save up to $16,299 in fees. 3 minutes to get started.

Need the cash from your home fast? Sell to .

Nearby similar homes

OPEN SEP 27, 1PM TO 3PM

$5,500,000

6 beds4.5 baths5,778 sq ft

1951 Vista Dr, Boulder, CO 80304

VIDEO TOUR

$4,995,000

5 beds4.5 baths5,964 sq ft

497 Kalmia Ave, Boulder, CO 80304

$2,975,000

4 beds3.5 baths3,215 sq ft

3123 3rd St, Boulder, CO 80304

NEW CONSTRUCTION

$2,595,000

4 beds3.5 baths2,699 sq ft

2445 Bluff St, Boulder, CO 80304

$3,250,000

4 beds5 baths4,969 sq ft

1127 Juniper Ave, Boulder, CO 80304

Shelby Sampson • The Agency - Denver

$1,995,000

3 beds2 baths1,820 sq ft

1412 Sunshine Canyon Dr, Boulder, CO 80302

New listings for sale in 80304

$1,295,000

3 beds2 baths1,890 sq ft

3065 23rd St, Boulder, CO 80304

3D WALKTHROUGH

$1,600,000

3 beds3.5 baths3,392 sq ft

2748 Winding Trail Dr, Boulder, CO 80304

$1,069,500

4 beds2 baths1,812 sq ft

2445 Forest Ave, Boulder, CO 80304

3D WALKTHROUGH

$2,695,000

5 beds3.5 baths3,513 sq ft

3560 16th St, Boulder, CO 80304

$1,549,000

4 beds3 baths3,968 sq ft

3540 19th St, Boulder, CO 80304

Jennifer Crow • RE/MAX Professionals

3D WALKTHROUGH

$820,000

3 beds1.5 baths1,400 sq ft

3565 19th St, Boulder, CO 80304

FOR SALE BY OWNER

$750,000

3 beds2 baths1,552 sq ft

1683 Yellow Pine Ave, Boulder, CO 80304

$1,741,337

3 beds3.5 baths1,999 sq ft

1150 Violet Ave, Boulder, CO 80304

$695,000

2 beds2.5 baths1,368 sq ft

4555 13th St Unit 2A, Boulder, CO 80304

Home values near 312 Mapleton Ave

Data from public records.

Address	Redfin Estimate
403 Mapleton Avenue, Boulder, CO 3 Beds \| 2 Baths \| 3254 Sq. Ft.	$1,942,406
320 Mapleton Avenue, Boulder, CO 3 Beds \| 2 Baths \| 2730 Sq. Ft.	$1,715,410

Address	Redfin Estimate
332 Mapleton Avenue, Boulder, CO 5 Beds \| 3.5 Baths \| 4095 Sq. Ft.	$2,526,145
409 Mapleton Avenue, Boulder, CO 4 Beds \| 2 Baths \| 2414 Sq. Ft.	$1,665,414

Address	Redfin Estimate
304 Mapleton Avenue, Boulder, CO 4 Beds \| 3.5 Baths \| 2216 Sq. Ft.	$2,872,359
400 Mapleton Avenue, Boulder, CO 4 Beds \| 3.5 Baths \| 3476 Sq. Ft.	$3,117,166

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
80301 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 80304, CO

Sale history for 312 Mapleton Ave

Tax history for 312 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 312 Mapleton Ave

More real estate resources