Google street view image for 525 Mapleton Ave, Boulder, CO 80304

Off Market Nov 1967 for $31K

$1,822,622

Est. refi paymentEst. refi $215/mo

•

2 ba

•

2,240

sq ft

525 Mapleton Ave, Boulder, CO 80304

About this home

525 Mapleton Ave is a 2,240 square foot house on a 8,383 square foot lot with 2 bedrooms and 2 bathrooms. - it last sold on November 08, 1967 for $31,500. Based on Redfin's Boulder data, we estimate the home's value is $1,822,622.

Single-familyProperty Type

1903Year Built

8,383 sq ftLot Size

$814Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$1,822,622

$1.8M since sold in November 1967$15K since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 23.6% higher than the average sale price ($1.47M) of 6 comparable homes.

SOLD BY REDFIN JUN 30, 2026
$1,450,000
A
3 beds2 baths1,620 sq ft
826 Maxwell Ave, Boulder, CO 80304
Redfin Corporation
SOLD AUG 14, 2026
990 Grandview Ave, Boulder, CO 80302
$1,100,000
B
2 beds2 baths2,955 sq ft
990 Grandview Ave, Boulder, CO 80302
SOLD SEP 9, 2026
$1,080,000
C
3 beds2 baths1,549 sq ft
3011 13th St, Boulder, CO 80304
SOLD AUG 5, 2026
$2,215,000
D
3 beds2 baths2,104 sq ft
3133 5th St, Boulder, CO 80304
SOLD JUN 1, 2026
$1,600,000
E
3 beds2 baths1,800 sq ft
653 Dewey Ave, Boulder, CO 80304
Trelora Realty, Inc.
SOLD SEP 14, 2026
$1,400,000
F
2 beds1 bath1,579 sq ft
624 Maxwell Ave, Boulder, CO 80304

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Earn from this home

Sell

$1,715,919

Est. take-home

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Refinance

Est. cash available

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Rent

$3,755/mo

Redfin rental estimate

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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

OPEN TODAY, 11AM TO 1PM
$1,295,000
3 beds2 baths1,890 sq ft
3065 23rd St, Boulder, CO 80304
OPEN TODAY, 1PM TO 3PM
$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
OPEN TODAY, 1PM TO 3PM
$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
OPEN TODAY, 12PM TO 2PM
$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 525 Mapleton Ave

Year

Property tax

Land + Additions

Assessment*

2025

$14,577 (+2.2%)

$112,544 + $46,581

$159,125

2024

$14,258 (+1.8%)

$112,544 + $46,581

$159,125

2023

$14,011 (+9.4%)

$115,790 + $53,151

$168,941

2022

$12,805 (+4.9%)

$119,474 + $53,151

$172,625

2021

$12,210 (+3.9%)

$87,063 + $57,775

$144,838

2020

$11,752 (+1.6%)

$89,568 + $59,438

$149,006

2019

$11,572 (+15.9%)

$82,940 + $59,223

$142,163

2018

$9,988 (+3.2%)

$82,940 + $59,223

$142,163

2017

$9,675 (−4.5%)

$75,024 + $47,376

$122,400

2016

$10,129 (−6.2%)

$75,024 + $47,376

$122,400

2015

$10,796 (+59.4%)

$65,750 + $59,222

$124,972

2014

$6,771 (+2.2%)

$31,283 + $55,441

$86,724

2013

$6,623 (−5.2%)

$31,283 + $55,441

$86,724

2012

$6,988 (−7.9%)

$31,283 + $55,441

$86,724

2011

$7,588 (+10.5%)

$33,352 + $58,028

$91,380

2010

$6,868 (+7.1%)

$33,352 + $58,028

$91,380

2009

$6,413

$47,760 + $37,210

$84,970

Tax history for 525 Mapleton Ave

Year

Property tax

Land + Additions

Assessment*

2025

$14,577 (+2.2%)

$112,544 + $46,581

$159,125

2024

$14,258 (+1.8%)

$112,544 + $46,581

$159,125

2023

$14,011 (+9.4%)

$115,790 + $53,151

$168,941

2022

$12,805 (+4.9%)

$119,474 + $53,151

$172,625

2021

$12,210 (+3.9%)

$87,063 + $57,775

$144,838

2020

$11,752 (+1.6%)

$89,568 + $59,438

$149,006

2019

$11,572 (+15.9%)

$82,940 + $59,223

$142,163

2018

$9,988 (+3.2%)

$82,940 + $59,223

$142,163

2017

$9,675 (−4.5%)

$75,024 + $47,376

$122,400

2016

$10,129 (−6.2%)

$75,024 + $47,376

$122,400

2015

$10,796 (+59.4%)

$65,750 + $59,222

$124,972

2014

$6,771 (+2.2%)

$31,283 + $55,441

$86,724

2013

$6,623 (−5.2%)

$31,283 + $55,441

$86,724

2012

$6,988 (−7.9%)

$31,283 + $55,441

$86,724

2011

$7,588 (+10.5%)

$33,352 + $58,028

$91,380

2010

$6,868 (+7.1%)

$33,352 + $58,028

$91,380

2009

$6,413

$47,760 + $37,210

$84,970

*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: 630
Basement Type: Unfinished

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

Heating & Cooling
Heating Type: Forced Air

Room Information
# of Rooms: 4

Exterior

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

Property Information
Subdivision Name: MAPLETON
Living Sq. Ft: 2,240
Ground Floor Sq. Ft: 1,120
Building Sq. Ft: 2,870
Stories Type: 2 Plus
Legal Description: LOTS 52-53 BLK 4 MAPLETON

Parking & Garage Information
Parking Type: Detached Garage
Garage/Parking Sq. Ft: 270
Garage / Carport Type: Detached

Lot Information
# of Buildings: 1
Land Sq. Ft: 8,383
Legal Lot Number: 52
Legal Block Number: 4
Municipality Name: BOULDER
Acres: 0.1924
County Use Description: 1 FAMILY RESID

Financial

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

Public facts

Beds: 2
Baths: 2.0
Sq. Ft.: 2,240
Stories: —
Lot Size: 8,383 square feet
Style: Single Family Residential
Year Built: 1903
Year Renovated: 1965
County: Boulder County
APN: R0002087

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 • 0.5mi

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

$1.73M – $2.10M

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OPEN TODAY, 12PM TO 2PM3D WALKTHROUGH

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Home values near 525 Mapleton Ave

Data from public records.

Address	Redfin Estimate
520 Mapleton Avenue, Boulder, CO 4 Beds \| 2 Baths \| 1928 Sq. Ft.	$1,763,162
501 Mapleton Avenue, Boulder, CO 5 Beds \| 5 Baths \| 4832 Sq. Ft.	$3,044,684

Address	Redfin Estimate
502 Mapleton Avenue, Boulder, CO 5 Beds \| 4 Baths \| 4508 Sq. Ft.	$3,266,913
456 Mapleton Avenue, Boulder, CO 5 Beds \| 3.5 Baths \| 3683 Sq. Ft.	$2,397,064

Address	Redfin Estimate
515 Mapleton Avenue, Boulder, CO 2 Beds \| 1 Baths \| 1377 Sq. Ft.	$1,354,528
535 Mapleton Avenue, Boulder, CO 6 Beds \| 4 Baths \| 5158 Sq. Ft.	$3,236,697

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GreatSchools Ratings provided by GreatSchools.org.

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About this home

Redfin Estimate

Earn from this home

Market trends in 80304, CO

Sale history for 525 Mapleton Ave

Tax history for 525 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 525 Mapleton Ave

More real estate resources