Developer proposes penthouse and rear-yard changes at 22 East 10th; committee presses for geotechnical safeguards
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Summary
A design team proposed a penthouse and rear-yard extension at 22 East 10th Street that would lower and extend the cellar and require underpinning across both neighboring facades; the Landmarks Committee asked for geotechnical reports and standard excavation/underpinning conditions before approval.
Jason Allen of Workshop Design & Architecture presented a package of alterations for 22 East 10th Street that includes demolishing a rear-yard extension, constructing a new rear addition and penthouse that will read from the street as an "artist skylight," and lowering/extending the cellar with underpinning.
Allen provided dimensional details: the penthouse footprint is approximately "38 and a half feet by 17 and a half" with interior clearances of about 8'10" and a rooftop bulkhead rising roughly 2 feet above that. The proposal increases the rear-yard depth from 27 feet to 30 feet at the base, with additional set-backs at upper floors and a 5-foot planted buffer requested by LPC along the rear lot line.
Committee members focused on excavation and structural risks. The presenter said there will be underpinning and structural engineering work along the full length of the building on both sides. Members asked for geotechnical borings, engineering reports and standard language requiring that underpinning and excavation be completed to the LPC’s and DOB’s standards; committee staff said standard excavation conditions would be included in any resolution.
No formal vote is recorded in the transcript; the committee deferred drafting final resolution language to the business session and signaled that underpinning, neighbor coordination and engineer certifications must be documented prior to final approval.