Commission approves rooftop and three‑story rear yard additions at Fort Greene rowhouse

The Landmarks Preservation Commission approved a three‑story rear yard addition with a small rooftop penthouse at 419 Claremont Avenue in the Fort Greene Historic District (LPC 25-09077).

PKSB Architects presented the application for the Italianate rowhouse, noting the building had been converted to multifamily in the late 1930s and retains much of its original interior staircase and footprint. The applicant said the project would provide life‑safety upgrades—including a new code‑compliant interior stair and sprinklers—allow the removal of an exterior fire escape, and create two legal bedrooms by expanding the rear footprint. The applicant described coordination to avoid underpinning by matching neighboring footings.

Presenters showed nearby precedents: previously approved three‑story rear additions on Vanderbilt and Claremont Avenues and a range of two‑ and three‑story rear additions on the block. The applicant said a visibility mock‑up was built and subsequently lowered; staff reported rooftop visibility was minimal and the addition would be set back more than 16 feet from the street facade.

Neighbors raised construction‑period concerns including noise, privacy and light impacts and asked whether the owner would be locally based and responsive; the applicant said he intends to manage the property and keep lines of neighbor communication open. Brooklyn Community Board 2 recommended conditional approval.

Commissioners found the additions compatible with existing rear additions on the block, not visible from public thoroughfares in most views, and appropriate in scale and material (light‑colored stucco cladding and black double‑hung windows). The commission voted to approve.