OFF MARKET

Off market jun 2010 for $370K

$598,420

Est. refi paymentEst. refi $2,566/mo

•

674

sq ft

429 Mapleton Ave Unit A, Boulder, CO 80304

About this home

Public Remarks: Enjoy this wonderful Mapleton Hill location.Footsteps from Mt. Sanitas Open Space and an easy jaunt to West Pearl. THis home has been extensively renovated. It features: wood floors,tall ceilings,original doors and millwork and hardware,smoothcoat drywall,exposed brick. large eat in kitchen with granite counters. This unit has front and back porch that both open up to lovely cottage style gardens. The heat is included in the HOA. Featured in the NY Times Dec 18 Boulder article.

TownhomeProperty Type

1906Year Built

26 sq ftLot Size

$888Est. Price/Sq.Ft.

Listed by Dave Naber • Walnut Realty, Inc.

Contact: 3034423180

Bought with Dave Naber • Walnut Realty, Inc.

•303-442-3180 (broker)

•info@walnutrealty.com (broker)

Redfin checked: a few seconds ago

•Source:IRES as Distributed by MLS Grid #613229

Redfin Estimate

$598,420

$228K since sold in June 2010$16K since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 15.6% higher than the average sale price ($518K) of 6 comparable homes.

SOLD JUL 24, 2026
421 Mapleton Ave Unit A, Boulder, CO 80304
$727,000
A
1 bed1 bath618 sq ft
421 Mapleton Ave Unit A, Boulder, CO 80304
SOLD JUL 2, 2026
$289,000
B
1 bed1 bath612 sq ft
1111 Maxwell Ave #105, Boulder, CO 80304
SOLD APR 2, 2026
$585,000
C
1 bed1 bath720 sq ft
620 Pearl St Unit C, Boulder, CO 80302
SOLD JUL 31, 2026
$510,000
D
2 beds1 bath748 sq ft
625 Pearl St #23, Boulder, CO 80302
HomeSmart
SOLD DEC 1, 2025
$445,000
E
1 bed1 bath638 sq ft
625 Pearl St #22, Boulder, CO 80302
SOLD SEP 18, 2026
$550,000
F
1 bed1 bath959 sq ft
836 Walnut St Unit B, Boulder, CO 80302

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Earn from this home

Sell

$383,986

Est. take-home

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Refinance

Est. cash available

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Rent

$1,355/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

97.3%

+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

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VIDEO TOUR
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OPEN SAT, 11AM TO 1PM
$1,350,000
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3D WALKTHROUGH
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See all

Provided by Redfin

Sale history for 429 Mapleton Ave Unit A

Date

Event

Price

IRES as Distributed by MLS Grid #613229

Jun 24, 2010

Sold

$370,000

$549/sq ft

Nov 2, 2009

Listed

$395,000

$586/sq ft

IRES as Distributed by MLS Grid #604863

Nov 1, 2009

Listing Removed

—

Jul 15, 2009

Listed

$399,000

$592/sq ft

IRES as Distributed by MLS Grid #490792

Jun 12, 2006

Sold

$359,000

$533/sq ft

May 2, 2006

Listed

$364,900

$541/sq ft

IRES as Distributed by MLS Grid #416221

Aug 24, 2004

Sold

$329,000

$488/sq ft

Jun 8, 2004

Listed

$329,000

$488/sq ft

IRES as Distributed by MLS Grid #303803

Jun 27, 2001

Sold

$272,500

$404/sq ft

Apr 19, 2001

Listed

$279,900

$415/sq ft

Year

Property tax

Land + Additions

Assessment*

2025

$4,023 (+31.3%)

$41,350

2024

$3,064 (+1.9%)

$41,350

2023

$3,008 (−5.6%)

$33,967

2022

$3,186 (+4.7%)

$37,652

2021

$3,041 (+1.8%)

$33,499

2020

$2,986 (+1.6%)

$34,463

2019

$2,940 (+15.8%)

$34,306

2018

$2,539 (+3.2%)

$34,306

2017

$2,460 (−16.6%)

$29,290

2016

$2,949 (+5.6%)

$29,290

2015

$2,793 (+25.6%)

$34,077

2014

$2,224 (+2.2%)

$25,870

2013

$2,175 (+6.1%)

$25,870

2012

$2,050 (+0.9%)

$25,870

2011

$2,032 (−7.9%)

$24,477

2010

$2,207 (+7.1%)

$24,477

2009

$2,061

$27,310

Tax history for 429 Mapleton Ave Unit A

Year

Property tax

Land + Additions

Assessment*

2025

$4,023 (+31.3%)

$41,350

2024

$3,064 (+1.9%)

$41,350

2023

$3,008 (−5.6%)

$33,967

2022

$3,186 (+4.7%)

$37,652

2021

$3,041 (+1.8%)

$33,499

2020

$2,986 (+1.6%)

$34,463

2019

$2,940 (+15.8%)

$34,306

2018

$2,539 (+3.2%)

$34,306

2017

$2,460 (−16.6%)

$29,290

2016

$2,949 (+5.6%)

$29,290

2015

$2,793 (+25.6%)

$34,077

2014

$2,224 (+2.2%)

$25,870

2013

$2,175 (+6.1%)

$25,870

2012

$2,050 (+0.9%)

$25,870

2011

$2,032 (−7.9%)

$24,477

2010

$2,207 (+7.1%)

$24,477

2009

$2,061

$27,310

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

Public record

Public record
Zoning

Beds

Baths

Stories

Lot width

—

Lot depth

—

Lot size

—

Year renovated

1906

Sq. Ft.

642

Year built

1906

Style

Condo/Co-op

County

Boulder County

APN

R0140897

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Sep 2, 2026.

Property details

Parking

Parking Features
Covered Spaces: 0
Garage Spaces: 0

Interior

Bathroom Information
Bathrooms (Full): 1
Bathrooms (Half): 0
Bathrooms (Three Quarter): 0

Bedroom Information
Bedrooms Total: 1

Heating & Cooling
Heating: Yes
Hot Water, Baseboard

Interior Features
Accessibility Features: Level Lot
Gas Range/Oven, Dishwasher, Refrigerator
Flooring: Wood Floors
Laundry Features: Common Area

Room Information
Basement: None

Exterior

Exterior Features
Fencing: Partial
Patio and Porch Features: Patio
Roof: Composition

Lot Information
Horse(s): No
Lot Features: Wooded
Zoning: REs

Property Information
Property Attached: Yes
Property Type: Attached Dwelling
Property Sub Type: Attached Dwelling
View: Yes
Waterfront: No

Subdivision Information
Subdivision Name: Mapleton Ave Condo
MLS Area Major: Boulder

Building Information
Above Grade Finished Area: 674
Building Area Total: 674
Common Walls: No One Below
Construction Materials: Brick/Brick Veneer

Financial

Tax Information
Parcel Number: R0140897
Tax Annual Amount: 2108
Tax Year: 2008

Financial Information
Listing Terms: Cash, Conventional

Utilities

Utility Information
Utilities: Natural Gas Available, Electricity Available
Electric: Electric
Gas: Natural Gas
Sewer: City Sewer

Location

HOA Information
Association: Yes
Association Fee: 300
Association Fee Frequency: Monthly
Association Fee Includes: Common Amenities, Trash, Snow Removal, Maintenance Grounds, Management, Utilities, Maintenance Structure
Community Features: Park

School Information
High School District: Boulder Valley Dist RE2
Elementary School: Whittier
Middle or Junior School: Casey
High School: Boulder

Location Information
Directions: 9th st to Mapleton. West on Mapleton Building. Unit 429 A is the second doowsy in from the East Side of the building.
Unparsed Address: 429 Mapleton Ave A Boulder CO 80304
Street Number: 429
Street Name: Mapleton
Street Suffix: Ave
UnitNumber: A
City: Boulder
State or Province: CO
County or Parish: Boulder
Country: US
Postal Code: 80304
Coordinates: -105.291003,40.020612
Latitude: 40.020612
Longitude: -105.291003

Public facts

Beds: 1
Baths: 1.0
Sq. Ft.: 642
Stories: 1.0
Lot Size: —
Style: Condo/Co-op
Year Built: 1906
Year Renovated: 1906
County: Boulder County
APN: R0140897

Home facts updated by county records on Sep 2, 2026

Other

Listing Information
Attribution Contact: 3034423180
Close Price: $370,000
Photos Count: 17
Special Listing Conditions: Private Owner
Standard Status: Closed

Listing Date Information
Close Date: Thursday, June 24, 2010
Cumulative Days on Market: 345
Days on Market: 235
Listing Contract Date: Monday, November 2, 2009
Modification Timestamp: Friday, July 26, 2024 8:48 AM

Home Information
Entry Level: 1
Entry Location: 1st Floor
Window Features: Window Coverings, Wood Frames
Year Built: 1906

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

$569,000 – $689,000

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Home values near 429 Mapleton Ave Unit A

Data from public records.

Address	Redfin Estimate
403 Mapleton Avenue, Boulder, CO 3 Beds \| 2 Baths \| 3254 Sq. Ft.	$1,985,022
400 Mapleton Avenue, Boulder, CO 4 Beds \| 3.5 Baths \| 3476 Sq. Ft.	$3,185,905

Address	Redfin Estimate
409 Mapleton Avenue, Boulder, CO 4 Beds \| 2 Baths \| 2414 Sq. Ft.	$1,663,991
417 Mapleton Avenue Unit A, Boulder, CO 1 Beds \| 1 Baths \| 617 Sq. Ft.	$614,730

Address	Redfin Estimate
424 Mapleton Avenue, Boulder, CO 3 Beds \| 3.5 Baths \| 2966 Sq. Ft.	$2,899,682
430 Mapleton Avenue, Boulder, CO 5 Beds \| 2 Baths \| 3345 Sq. Ft.	$3,074,313

Property information provided by IRES as Distributed by MLS Grid when last listed in 2009. This data may not match . 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 429 Mapleton Ave Unit A

Tax history for 429 Mapleton Ave Unit A

Public record

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 429 Mapleton Ave Unit A

More real estate resources