Marek Kaczor pays $3.4M for mixed-use in Greenpoint

Marek Kaczor through the entity 678 Manhattan LLC paid $3.4 million to Kristy Sung Kim and Christopher Sung for the two-unit mixed-use building (S2) at 678 Manhattan Avenue in Greenpoint, Brooklyn. The expected use is cash flowing.
The deal closed on November 10, 2025 and was recorded on November 19, 2025. The property has 5,251 square feet of built space and 2,250 square feet of additional air rights for a total buildable of 7,500 square feet according to a PincusCo analysis of city data. The sale price per built square foot is $647 and the price per buildable square foot is $453 per the PincusCo analysis. (The price per square foot analysis is the transaction price divided by square feet as reported in public records and assumes no air rights have been sold.)
The signatory for Kristy Sung Kim and Christopher Sung was Kristy Sung Kim and Christopher Sung. The signatory for Marek Kaczor was Avi Rosengarten . The contract date was August 11, 2025.

Prior sales and revenue

Prior to this transaction, PincusCo has records that the buyer Marek Kaczor purchased three properties in three transactions for a total of $9.5 million and sold five properties in five transactions for a total of $16.8 million over the past 24 months.
The seller Kristy Sung Kim had not purchased any other properties and had not sold any properties over the same time period.

The property

The mixed-use building with 2 residential units in Greenpoint has 5,251 square feet of built space and 2,250 square feet of additional air rights for a total buildable of 7,500 square feet according to a PincusCo analysis of city data. The parcel has frontage of 25 feet and is 100 feet deep with a total lot size of 2,500 square feet. The zoning is R6A which allows for up to 3 times floor area ratio (FAR) for residential with inclusionary housing. The city-designated market value for the property in 2022 is $4.2 million.

Violations and lawsuits

There were no lawsuits or bankruptcies filed against the property for the past 24 months. In addition, according to city public data, the property has not received any significant violations in the last year.

Development

There are no active new building construction projects or major alteration projects with initial costs more than $1 million on this tax lot.

The neighborhood

In Greenpoint, The bulk, or 29 percent of the 23.8 million square feet of commercial built space are walkup buildings, with industrial buildings next occupying 26 percent of the space. In sales, Greenpoint has 3.1 times the average sales volume among other neighborhoods with $916.8 million in sales volume in the last two years and is the 3rd highest in Brooklyn. For development, Greenpoint has 1.9 times the average amount of major developments relative to other neighborhoods and is the 3rd highest in Brooklyn. It had 2.9 million square feet of commercial and multi-family construction under development in the last two years, which represents 12 percent of the neighborhood’s built space. There was one pre-foreclosure suit filed among other mixed-use buildings in the past 12 months.

The block

On this tax block, PincusCo has identified the owners of 20 of the 31 commercial properties representing 137,403 square feet of the 182,319 square feet. The largest owner is Viking Management, followed by Steve Goldman (230 Java) and then Sung Sung Baik.
There are no active new building construction projects on this tax block.

The majority, or 54 percent of the 182,319 square feet of built space are mixed-use buildings, with walkup buildings next occupying 40 percent of the space.

The buyer

The PincusCo database currently indicates that Marek Kaczor owned at least six commercial properties with 26 residential units in New York City with 21,362 square feet and a city-determined market value of $9.6 million. (Market value is typically about 50% of actual value.) The portfolio has $1.9 million in debt, borrowed from Polish & Slavic Federal Credit Union. Within the portfolio, the bulk, or 54 percent of the 21,362 square feet of built space are walkup properties, with C3 properties next occupying 26 percent of the space. They are all located in Brooklyn.

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