How many homes has John Mammano sold?

John Mammano has completed 32 verified sales with a total volume of $18.9M. This data comes directly from verified transaction records, not self-reported numbers.

What areas does John Mammano specialize in?

John Mammano is most active in Washington, Virginia. Their market expertise spans multiple neighborhoods across Northern Virginia.

What is John Mammano's average sale price?

John Mammano's average sale price is $590K with a 100.2% sold-to-list ratio, indicating strong negotiation skills. Their average days on market is 29 days.

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John Mammano

Platinum

Compass

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About John

John Mammano is a real estate professional with Compass, specializing in Washington and surrounding areas. With 38 career transactions and an average sale price of $574,511, John brings proven local market expertise to every client.

Areas of Expertise

Washington

Active in 12 ZIP codes across DC

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Listing information is provided through IDX courtesy Keller Williams Capital Properties.

Information Deemed Reliable But Not Guaranteed.

Data last updated: 05/17/2026.

View full MLS disclosures

The data relating to real estate for sale on this website appears in part through the BRIGHT Internet Data Exchange program, a voluntary cooperative exchange of property listing data between licensed real estate brokerage firms in which Keller Williams Capital Properties participates, and is provided by BRIGHT through a licensing agreement.

The information provided by this website is for the personal, non-commercial use of consumers and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.

Some properties which appear for sale on this website may no longer be available because they are under contract, have Closed or are no longer being offered for sale.

Some real estate firms do not participate in IDX and their listings do not appear on this website. Some properties listed with participating firms do not appear on this website at the request of the seller.

This home sale information is not to be construed as an appraisal and may not be used as such for any purpose.

BRIGHT MLS is the (or a) provider of this home sale information and has compiled content from various sources. Some properties represented may not have actually sold due to reporting errors.

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