OFF MARKET

Off Market Sep 2008 for $499K

$1,276,469

Est. refi paymentEst. refi $3,372/mo

•

600

sq ft

328 Mapleton Ave, Boulder, CO 80304

About this home

Public Remarks: BUYER to VERIFY w/CITY of BLDR: Live in this sweet home as is or expand. Total lot size is 4,375 sf. Allows an above grade (not including basement) sq ft of 3500 incl garage, using the current permissable FAR of 0.8. Bldg height is limited to 28' due to lot size, enough for a 2 story home. Buyer can build a 20' wide 2 story with a max footprint of 1500 sq ft (3000 sq ft for 2 floors if solar shade criteria allows entire footprint on 2nd floor) plus a basement.

Single-familyProperty Type

1922Year Built

4,375 sq ftLot Size

$2,127Est. Price/Sq.Ft.

Listed by Eric Jacobson • RE/MAX of Boulder, Inc

Contact: 3034497000

Bought with Christopher Sweeney • Pedal To Properties-Pearl

•303-444-4643 (broker)

Redfin checked: a minute ago

•Source:IRES as Distributed by MLS Grid #574273

Redfin Estimate

$1,276,469

$777K since sold in September 2008$8,000 since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 16.1% higher than the average sale price ($1.10M) of 6 comparable homes.

SOLD MAY 28, 2026
$1,145,000
A
2 beds1.5 baths1,472 sq ft
1453 Chestnut Pl, Boulder, CO 80304
SOLD SEP 14, 2026
$1,400,000
B
2 beds1 bath1,579 sq ft
624 Maxwell Ave, Boulder, CO 80304
SOLD MAY 22, 2026
$1,000,000
C
2 beds1 bath671 sq ft
3005 6th St, Boulder, CO 80304
SOLD JUN 25, 2026
$850,000
D
2 beds1 bath940 sq ft
1905 Arapahoe Ave, Boulder, CO 80302
SOLD SEP 4, 2026
$942,200
E
3 beds1 bath934 sq ft
1574 North St, Boulder, CO 80304
SOLD JUN 16, 2026
$1,258,823
F
2 beds1 bath964 sq ft
2915 11th St, Boulder, CO 80304

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Earn from this home

Sell

$985,115

Est. take-home

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Refinance

Est. cash available

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Rent

$5,370/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

NEW 2 HRS AGO
$300,000
1 bed1 bath400 sq ft
2711 Mapleton Ave #1, Boulder, CO 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
3D WALKTHROUGH
$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
See all

Provided by Redfin

Sale history for 328 Mapleton Ave

Year

Property tax

Land + Additions

Assessment*

2025

$11,825 (+12.2%)

$71,063 + $52,956

$124,019

2024

$10,540 (+1.8%)

$71,063 + $52,956

$124,019

2023

$10,357 (−1.8%)

$74,149 + $45,781

$119,930

2022

$10,547 (+4.9%)

$74,149 + $49,466

$123,615

2021

$10,058 (+15.2%)

$62,209 + $51,367

$113,576

2020

$8,727 (+1.6%)

$64,000 + $52,846

$116,846

2019

$8,593 (+8.0%)

$52,481 + $47,776

$100,257

2018

$7,955 (+3.2%)

$52,481 + $47,776

$100,257

2017

$7,706 (+13.6%)

$49,032 + $42,725

$91,757

2016

$6,784 (+5.6%)

$49,032 + $42,725

$91,757

2015

$6,424 (+18.0%)

$43,143 + $35,231

$78,374

2014

$5,443 (+2.2%)

$21,810 + $41,503

$63,313

2013

$5,323 (−0.2%)

$21,810 + $41,503

$63,313

2012

$5,335 (+100.9%)

$21,810 + $41,503

$63,313

2011

$2,655 (−15.2%)

$18,626 + $45,054

$63,680

2010

$3,133 (+5.3%)

$18,626 + $13,353

$31,979

2009

$2,975

$37,570 + $1,190

$38,760

Tax history for 328 Mapleton Ave

Year

Property tax

Land + Additions

Assessment*

2025

$11,825 (+12.2%)

$71,063 + $52,956

$124,019

2024

$10,540 (+1.8%)

$71,063 + $52,956

$124,019

2023

$10,357 (−1.8%)

$74,149 + $45,781

$119,930

2022

$10,547 (+4.9%)

$74,149 + $49,466

$123,615

2021

$10,058 (+15.2%)

$62,209 + $51,367

$113,576

2020

$8,727 (+1.6%)

$64,000 + $52,846

$116,846

2019

$8,593 (+8.0%)

$52,481 + $47,776

$100,257

2018

$7,955 (+3.2%)

$52,481 + $47,776

$100,257

2017

$7,706 (+13.6%)

$49,032 + $42,725

$91,757

2016

$6,784 (+5.6%)

$49,032 + $42,725

$91,757

2015

$6,424 (+18.0%)

$43,143 + $35,231

$78,374

2014

$5,443 (+2.2%)

$21,810 + $41,503

$63,313

2013

$5,323 (−0.2%)

$21,810 + $41,503

$63,313

2012

$5,335 (+100.9%)

$21,810 + $41,503

$63,313

2011

$2,655 (−15.2%)

$18,626 + $45,054

$63,680

2010

$3,133 (+5.3%)

$18,626 + $13,353

$31,979

2009

$2,975

$37,570 + $1,190

$38,760

*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

4,280 Sq. Ft.

Year renovated

2000

Sq. Ft.

2,683

Year built

1922

Style

Single Family Residential

County

Boulder County

APN

R0006510

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: 2

Heating & Cooling
Heating: Yes
Space Heater

Interior Features
Accessibility Features: Level Lot, Near Bus
Gas Range/Oven, Refrigerator
Fireplace: Yes
Fireplace Features: Gas
Flooring: Wood Floors
Study Area

Room Information
Basement: None

Exterior

Exterior Features
Fencing: Partial
Roof: Composition

Land Information
Road Surface Type: Paved

Lot Information
Horse(s): No
Lot Features: Level
Zoning: RES

Property Information
Property Type: Residential
View: Yes
Waterfront: No

Subdivision Information
Subdivision Name: Mapleton Park
MLS Area Major: Boulder

Building Information
Above Grade Finished Area: 600
Building Area Total: 600
Construction Materials: Wood/Frame

Financial

Tax Information
Parcel Number: R0006510
Tax Annual Amount: 2863
Tax Year: 2007

Financial Information
Listing Terms: Cash, Conventional

Utilities

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

Location

HOA Information
Association: No
Association Fee: 0

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

Location Information
Unparsed Address: 328 Mapleton Ave Boulder CO 80304
Street Number: 328
Street Name: Mapleton
Street Suffix: Ave
City: Boulder
State or Province: CO
County or Parish: Boulder
Country: US
Postal Code: 80304
Coordinates: -105.292326,40.02051
Latitude: 40.02051
Longitude: -105.292326

Public facts

Beds: 4
Baths: 3.0
Sq. Ft.: 2,683
Stories: —
Lot Size: 4,280 square feet
Style: Single Family Residential
Year Built: 1922
Year Renovated: 2000
County: Boulder County
APN: R0006510

Home facts updated by county records on Sep 2, 2026

Other

Listing Information
Attribution Contact: 3034497000
Close Price: $499,000
Photos Count: 2
Possible Use: Single Family
Special Listing Conditions: Private Owner
Standard Status: Closed

Listing Date Information
Close Date: Monday, September 15, 2008
Cumulative Days on Market: 75
Days on Market: 75
Listing Contract Date: Thursday, July 3, 2008
Modification Timestamp: Thursday, July 25, 2024 3:33 PM

Home Information
Window Features: Wood Frames
Year Built: 1922

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

2% chance of being in a wildfire in next 30 years

3/10 Heat Factor

7 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

$1.21M – $1.47M

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FOR SALE BY OWNER

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Home values near 328 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
312 Mapleton Avenue, Boulder, CO 3 Beds \| 2 Baths \| 2086 Sq. Ft.	$1,629,880

Address	Redfin Estimate
304 Mapleton Avenue, Boulder, CO 4 Beds \| 3.5 Baths \| 2216 Sq. Ft.	$2,872,359
409 Mapleton Avenue, Boulder, CO 4 Beds \| 2 Baths \| 2414 Sq. Ft.	$1,665,414

Property information provided by IRES as Distributed by MLS Grid when last listed in 2008. 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 328 Mapleton Ave

Tax history for 328 Mapleton Ave

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 328 Mapleton Ave

More real estate resources