Daniel Klaynberg

President

Ceo

Spectra Construction and Development

(Spectra Construction & Development)

Owner

1 Gold Street, Suite 17G Hartford, CT 06103

554 Fifth Avenue, 5th Floor New York, NY 10036

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Spectra Construction and Development|Wonder Works Construction NYC portfolio

$34.2 million -mixed-use 99%; Manhattan 99%*

2737th largest portfolio by dollar value

13,322 sqft – mixed-use 100%; Manhattan 100%

5720th largest by SF

3 properties – Manhattan 100%

2922th largest

0 foreclosures, 0 bankruptcies, 1 other court case.

Notes

Daniel Klaynberg is president and CEO of Spectra and CFO at Wonder Works Construction, which was founded by his father Joseph Klaynberg.

Person Activity past 24 months:

Buyer signatory: 1 for $12.2 million

Borrower signatory: 1 for $28 million

Developer (new building or major alteration): 8 for 51,057 square feet

Top Ten Associated Companies:

Castellan Capital (1), Skyland Management (1)

Top Ten Associated People:

Michael Katz (1)

Recent activity as signatory:

• Spectra Construction and Development borrowed $28 million from Castellan Capital for 122 Lexington Avenue on April 30, 2026.

• Daniel Klaynberg filed plans for new building for 51,057 sqft in NoMad, Manhattan, on July 21, 2025.

• Skyland Management sold 122 Lexington Avenue for $12.2 million to Spectra Construction and Development on April 01, 2025.

Court Records:

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Properties:

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