OFF MARKET

Off market aug 2005 for $273K

$1,437,404

Est. refi paymentEst. refi $1,889/mo

•

1,825

sq ft

1821 Mapleton Ave, Boulder, CO 80304

About this home

Single-familyProperty Type

1925Year Built

7,679 sq ftLot Size

$788Est. Price/Sq.Ft.

Listed by John McElveen • RE/MAX of Boulder, Inc

Bought with Andy Tanas • RE/MAX of Boulder, Inc

•303-449-7000 (broker)

•REMAX@boulderco.com (broker)

Source:IRES as Distributed by MLS Grid #442759

Redfin Estimate

$1,437,404

$1.2M since sold in August 2005$14K since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 41.9% higher than the average sale price ($1.01M) of 5 comparable homes.

SOLD SEP 9, 2026
$1,150,000
A
3 beds2.5 baths1,348 sq ft
2910 19th St, Boulder, CO 80304
SOLD FEB 3, 2026
$1,157,500
B
3 beds2 baths1,440 sq ft
1557 North 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 APR 17, 2026
$800,000
D
3 beds2 baths1,529 sq ft
1412 Elder Ave, Boulder, CO 80304
SOLD MAY 20, 2026
$877,500
E
3 beds1 bath1,323 sq ft
2991 25th St, Boulder, CO 80304
Listing provided by metrolistCO

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Earn from this home

Sell

$1,260,812

Est. take-home

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Refinance

Est. cash available

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Rent

$3,658/mo

Redfin rental estimate

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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

New listings for sale

COMING SOON
$2,950,000
6 beds4.5 baths4,152 sq ft
805 Linden Ave, Boulder, CO 80304
NEW 23 HRS AGO
$1,100,000
3 beds2.5 baths2,208 sq ft
1192 Quince Ave, Boulder, CO 80304
OPEN THU, 12PM TO 2PM
$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
$270,000
2 beds1 bath792 sq ft
2707 Valmont Rd Unit 311D, Boulder, CO 80304
See all

Provided by Redfin

Sale history for 1821 Mapleton Ave

Date

Event

Price

Public Records

Aug 19, 2005

Sold

$273,700

$150/sq ft

Public Records

Aug 5, 2005

Sold

$595,000

$326/sq ft

IRES as Distributed by MLS Grid #442759

Apr 6, 2005

Sold

$549,000

$301/sq ft

Feb 25, 2005

Listed

$549,000

$301/sq ft

IRES as Distributed by MLS Grid #158548

Oct 27, 1997

Sold

$256,000

$140/sq ft

Jul 17, 1997

Listed

$267,500

$147/sq ft

Public Records

Apr 22, 1994

Sold

$253,600

$139/sq ft

Public Records

Dec 2, 1993

Sold

$159,900

$88/sq ft

Year

Property tax

Land + Additions

Assessment*

2025

$10,932 (+2.2%)

$70,288 + $43,519

$113,807

2024

$10,693 (+1.8%)

$70,288 + $43,519

$113,807

2023

$10,505 (+18.8%)

$70,336 + $50,438

$120,774

2022

$8,845 (+4.8%)

$74,022 + $50,438

$124,460

2021

$8,438 (+14.6%)

$57,768 + $36,668

$94,436

2020

$7,364 (+1.6%)

$59,431 + $37,724

$97,155

2019

$7,251 (+5.3%)

$50,980 + $33,619

$84,599

2018

$6,887 (+3.2%)

$50,980 + $33,619

$84,599

2017

$6,671 (+11.4%)

$39,096 + $40,335

$79,431

2016

$5,987 (+13.4%)

$39,096 + $40,335

$79,431

2015

$5,281 (+16.3%)

$34,148 + $35,024

$69,172

2014

$4,542 (+2.3%)

$24,039 + $28,791

$52,830

2013

$4,442 (+0.9%)

$24,039 + $28,791

$52,830

2012

$4,401 (+15.9%)

$24,039 + $28,791

$52,830

2011

$3,797 (−2.6%)

$30,089 + $22,447

$52,536

2010

$3,899 (+7.1%)

$30,089 + $15,641

$45,730

2009

$3,641

$40,520 + $7,720

$48,240

Tax history for 1821 Mapleton Ave

Year

Property tax

Land + Additions

Assessment*

2025

$10,932 (+2.2%)

$70,288 + $43,519

$113,807

2024

$10,693 (+1.8%)

$70,288 + $43,519

$113,807

2023

$10,505 (+18.8%)

$70,336 + $50,438

$120,774

2022

$8,845 (+4.8%)

$74,022 + $50,438

$124,460

2021

$8,438 (+14.6%)

$57,768 + $36,668

$94,436

2020

$7,364 (+1.6%)

$59,431 + $37,724

$97,155

2019

$7,251 (+5.3%)

$50,980 + $33,619

$84,599

2018

$6,887 (+3.2%)

$50,980 + $33,619

$84,599

2017

$6,671 (+11.4%)

$39,096 + $40,335

$79,431

2016

$5,987 (+13.4%)

$39,096 + $40,335

$79,431

2015

$5,281 (+16.3%)

$34,148 + $35,024

$69,172

2014

$4,542 (+2.3%)

$24,039 + $28,791

$52,830

2013

$4,442 (+0.9%)

$24,039 + $28,791

$52,830

2012

$4,401 (+15.9%)

$24,039 + $28,791

$52,830

2011

$3,797 (−2.6%)

$30,089 + $22,447

$52,536

2010

$3,899 (+7.1%)

$30,089 + $15,641

$45,730

2009

$3,641

$40,520 + $7,720

$48,240

*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

Bathroom Information
# of Full Baths: 2

Heating & Cooling
Heating Type: Forced Air

Room Information
# of Rooms: 7

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: BOULDER O T EAST & WEST & NORTH
Living Sq. Ft: 1,379
Ground Floor Sq. Ft: 1,379
Building Sq. Ft: 1,379
# of Stories: 1
Stories Type: 1
Legal Description: LOT 8 BLK 23 BOULDER NORTH & LOT 9 BLK 179 BOULDER EAST O T

Lot Information
# of Buildings: 2
Land Sq. Ft: 7,679
Legal Lot Number: 8
Legal Block Number: 23
Municipality Name: BOULDER
Acres: 0.1763
County Use Description: 1 FAMILY RESID

Financial

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

Public facts

Beds: 3
Baths: 2.5
Sq. Ft.: 1,825
Stories: 1.0
Parking Spaces: —
Basement: No
Accessible: No
Lot Size: 7,679 square feet
Style: Single Family Residential
Year Built: 1925
Year Renovated: 1995
County: Boulder County
APN: R0004252
HOA Dues: —
Garage: No
Features: —

Home facts updated by owner on Jan 1, 2025

Around this home

Schools

Whittier Elementary School

Public K-5 • Assigned • 0.2mi

6/10

Casey Middle School

Public 6-8 • Assigned • 0.4mi

5/10

Boulder High School

Public 9-12 • Assigned • 0.7mi

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

1% chance of being in a wildfire in next 30 years

3/10 Heat Factor

7 days above 90° 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)

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

$1.37M – $1.65M

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New listings for sale in 80304

COMING SOON

$2,950,000

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NEW 23 HRS AGO

$1,100,000

3 beds2.5 baths2,208 sq ft

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OPEN THU, 12PM TO 2PMVIDEO TOUR

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5 beds4.5 baths5,592 sq ft

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4 beds3.5 baths3,495 sq ft

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COMING SOON

$9,500,000

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4 beds3 baths3,215 sq ft

626 Poplar Ave, Boulder, CO 80304

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4 beds2.5 baths4,371 sq ft

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VIDEO TOUR

$2,650,000

4 beds1 bath2,179 sq ft

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Home values near 1821 Mapleton Ave

Data from public records.

Address	Redfin Estimate
1845 Mapleton Avenue, Boulder, CO 3 Beds \| 1.5 Baths \| 2084 Sq. Ft.	$1,308,879
1844 Mapleton Avenue, Boulder, CO 4 Beds \| 3 Baths \| 2383 Sq. Ft.	$1,958,337

Address	Redfin Estimate
1829 Mapleton Avenue, Boulder, CO 2 Beds \| 1 Baths \| 1092 Sq. Ft.	$1,363,430
1836 Mapleton Avenue, Boulder, CO 3 Beds \| 3 Baths \| 2210 Sq. Ft.	$2,215,294

Address	Redfin Estimate
1803 Mapleton Avenue, Boulder, CO 4 Beds \| 2 Baths \| 2120 Sq. Ft.	$1,741,920
1837 Mapleton Avenue, Boulder, CO 3 Beds \| 2 Baths \| 2466 Sq. Ft.	$1,890,641

This data may not show owner updates. Learn more.

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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 1821 Mapleton Ave

Tax history for 1821 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 1821 Mapleton Ave

More real estate resources