2. 909 Mapleton Ave Boulder CO
909 Mapleton Ave Boulder CO

Report Results for

909 Mapleton Ave Boulder, CO

909 Mapleton Ave Boulder, CO 80304 was built in 1894 and last sold for $425,000. The property has a lot size of 11,729 Sq Ft lot and is listed as a Single Family. The property is currently not for sale. Current estimates place the value near 4,412,000, reflecting a -14% change over the past year, with 5 beds, 3.75 baths, and approximately 5,118 sq ft of living space. If you are looking to buy or rent a property, use USPhoneBook's property database to avoid rental scams, understand tax liabilities, and get a sense of the property's value over time. You can also check out the neighborhood section and see nearby homes, last sold for prices, tax records and more.
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Public Facts

$425,000
Last sold Apr 14, 2015
5
Beds
3.75
Baths
5,118
Sqft
Off Market
$4,412,000 estimated value
Built in 1894
$862/sqft
11,729 lot sqft

Property characteristics

Property type
Residential
Zoning type
Single Family
APN
R0001867
Parking
2
Subdivision
Pleasant Corner - Bo
Heating
Forced air unit
Cooling
Central
Stories
2

Property History

Over the last 12 months, the sales price of 909 Mapleton Ave Boulder, CO 80304 has decreased by -14%.

Price History

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Year Price Price/Sq Ft
2026 $ 3,919,000 -14 % $ 766
2025 $ 4,557,000 31 % $ 890
2024 $ 3,476,000 -4 % $ 679
2023 $ 3,634,000 -8 % $ 710
2022 $ 3,982,000 30 % $ 778
2021 $ 3,047,000 ---- $ 595

Tax History

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Year Taxes Assesments
2026 ---- $ 236,620
2025 $ 20,141 13 %
2024 $ 17,728 1 % $ 227,050
2023 $ 17,420 -2 % $ 208,417
2022 $ 17,865 ---- $ 199,326
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Owner

Douglas Koenig Douglas Edward Koenig , Age 35

Lives at 909 Mapleton Ave, Boulder, CO 80304-4148
Relatives: Cindy Olbright, Eric Koenig, Herman Koenig, Janet Koenig, Kelly Koenig, Lara Koenig, Nancy Koenig, Nancy Pierce
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People Living at 909 Mapleton Ave Boulder, CO

Douglas Koenig Douglas Edward Koenig , Age 35

Lives at 909 Mapleton Ave, Boulder, CO 80304-4148 Boulder CO 80304 909 Mapleton Ave
Prior addresses: 25130 PO Box, Fresno, CA 93729-5130 Fresno CA 93729 25130 PO Box 1871 Race St, Denver, CO 80206-1115 Denver CO 80206 1871 Race St
Relatives: Cindy Olbright, Eric Koenig, Herman Koenig, Janet Koenig, Kelly Koenig, Lara Koenig, Nancy Koenig, Nancy Pierce
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Roger Koenig Roger Lee Koenig , Age 72

Lives at 909 Mapleton Ave, Boulder, CO 80304-4148 Boulder CO 80304 909 Mapleton Ave
Prior addresses: Po Box 25130, Fresno, CA 93729-5130 Fresno CA 93729 Po Box 25130 3990 Washington Ave, Apt 1411, Houston, TX 77007-5670 Houston TX 77007 3990 Washington Ave, Apt 1411
Relatives: Nancy Pierce, Cindy Olbright, Douglas Koenig, Eric Koenig, Herman Koenig, Janet Koenig, Kelly Koenig, Lara Koenig
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Cindy Olbright Cindy G Olbright , Age 70

Lives at 1041 Kalmia Ave, Boulder, CO 80304-1767 Boulder CO 80304 1041 Kalmia Ave
Prior addresses: 909 Mapleton Ave, Boulder, CO 80304-4148 Boulder CO 80304 909 Mapleton Ave 290 Hawthorn Ave, Boulder, CO 80304-2131 Boulder CO 80304 290 Hawthorn Ave 13801 NE 1st Pl, Bellevue, WA 98005-3454 Bellevue WA 98005 13801 NE 1st Pl
Relatives: Audrey Olbright, Douglas Koenig, Elliot Olbright, Eric Koenig, Erik Olbright, Herman Koenig, Janet Koenig, Kelly Koenig
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Eric Koenig Eric Scott Koenig , Age 37

Lives at 909 Mapleton Ave, Boulder, CO 80304-4148 Boulder CO 80304 909 Mapleton Ave
Prior addresses: 1719 Larch St, Apt C, Fort Collins, CO 80526-5755 Fort Collins CO 80526 1719 Larch St, Apt C 717 University AVE, Boulder, CO 80302-5904 Boulder CO 80302 717 University AVE
Relatives: Cindy Olbright, Douglas Koenig, Eric Koenig, Herman Koenig, Janet Koenig, Kelly Koenig, Lara Koenig, Nancy Koenig, Nancy Pierce
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Elliot Olbright Elliot Gregory Olbright , Age 31

Lives at 2405 Balsam St, Lakewood, CO 80214-5536 Lakewood CO 80214 2405 Balsam St
Prior addresses: 909 Mapleton Ave, Boulder, CO 80304-4148 Boulder CO 80304 909 Mapleton Ave 1041 Kalmia Ave, Boulder, CO 80304-1767 Boulder CO 80304 1041 Kalmia Ave 4410 W 30th AVE, Denver, CO 80212-3025 Denver CO 80212 4410 W 30th AVE
Relatives: Audrey Olbright, Cindy Olbright, Erik Olbright, Rebecca Olbright, Aj Spector, Bernard Jacobs, Candice Clark, David Jacobs, Douglas Koenig
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Janet Koenig Janet R Koenig , Age 99

Lives at 4733 Mohican Ln, Okemos, MI 48864-1404 Okemos MI 48864 4733 Mohican Ln
Prior addresses: 909 Mapleton Ave, Boulder, CO 80304-4148 Boulder CO 80304 909 Mapleton Ave
Relatives: Cindy Olbright, Douglas Koenig, Eric Koenig, Herman Koenig, Kelly Koenig, Lara Koenig, Nancy Koenig, Nancy Pierce
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Roger Koenig Roger Lee Koenig , Age 63

Lives at 1509 S Elder Ct, Broken Arrow, OK 74012-6211 Broken Arrow OK 74012 1509 S Elder Ct
Prior addresses: 909 Mapleton Ave, Boulder, CO 80304-4148 Boulder CO 80304 909 Mapleton Ave 4733 Mohican LN, Okemos, MI 48864-1404 Okemos MI 48864 4733 Mohican LN 805 Linn Rd, Williamston, MI 48895-9363 Williamston MI 48895 805 Linn Rd
Relatives: Rebecca Koenig, Bruce Koenig, Cindy Olbright, Dakota Koenig, Douglas Koenig, Eric Koenig, Helene Koenig, Herman Koenig
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Rebecca Olbright Rebecca Anne Olbright , Age 40

Lives at 4030 S Lake Ct, Decatur, IL 62521-8438 Decatur IL 62521 4030 S Lake Ct
Prior addresses: 3973 Joy Rd, Occidental, CA 95465-9351 Occidental CA 95465 3973 Joy Rd 421 Litho St, Sausalito, CA 94965-1932 Sausalito CA 94965 421 Litho St 64 Deming St, San Francisco, CA 94114-1869 San Francisco CA 94114 64 Deming St
Relatives: Aj Spector, Audrey Olbright, Cindy Olbright, Elliot Olbright, Erik Olbright, Greg Olbright, Tristan J, Bernard Jacobs, Candice Clark
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Neighbors

2330 9th St
Boulder, CO
View Property Report
933 Mapleton Ave
Boulder, CO
View Property Report
2336 9th St
Boulder, CO
View Property Report
847 Mapleton Ave
Boulder, CO
View Property Report

FAQs

Who lives at 909 Mapleton Ave, Boulder, CO 80304?
According to our records, the current person living in 909 Mapleton Ave is Douglas Koenig.
Is this property currently for sale?
The property is not for sale and last sold for $425,000 on Apr 14, 2015. Use USPhoneBook to review nearby listings or compare similar homes in the area.
What is the estimated value of this property?
The estimated value is $4,412,000, reflecting a -14% change over the past year. You can explore price history and tax records to see how the value has changed over time.
How big is this property?
It features approximately 5,118 sq ft of living space on a 11,729 sq ft lot, built in 1894 and classified as a Single Family.
What nearby properties can I compare this to?
Nearby homes include 2330 9th St, 933 Mapleton Ave, and 2336 9th St, each with its own property report to help compare size, value, and residents.