A new 31-unit luxury condominium building in Harlem. The building does not use natural gas or any other fuel for heating. The building is cooled and heated with a variable-refrigerant flow system in lieu of more conventional gas-fired boilers. A new 31-unit luxury condominium building in Harlem. The building does not use natural gas or any other fuel for heating. The building is cooled and heated with a variable-refrigerant flow system in lieu of more conventional gas-fired boilers. Home / Multifamily 18 WEST 116TH STREET, NYC ARCHITECT . GF55 PROJECT SIZE . 50,000 GSF PROJECT COST . $14.5 million SCOPE . Full MEP design, and construction administration services, energy modeling and sustainability consulting services. HVAC, sprinkler, plumbing and electrical power design and construction administration, sustainability, façade optimization, energy modeling. Go Go

The Evergreen team assists architects and designers create exciting cutting edge designed spaces, proficient in Building Services Engineering, High Performance Buildings, Local Law 87, Special and Progress Inspections and Backflow Prevention. Our Projects Multifamily 326 ROCKAWAY AVENUE 66 READE STREET EBENEZER PLAZA, BROOKLYN, NY 37 HILLSIDE AVE, NEW YORK, NY TIMBALE TERRACE 30 WATER STREET, OSSINING 30 WEST, VILLAGE OF HAVERSTRAW EAST TREMONT COMMUNITY DISTRICT 6, BRONX CENTRIC WOODSIDE NYC THE POPE FRANCIS APARTMENTS AT LORETO WALTON AVENUE 230 EAST 18TH STREET, BROOKLYN VAN CORTLANDT GREEN ADULT CARE FACILITY 776 MYRTLE, BROOKLYN 18 WEST 116TH STREET, NYC 435 WEST 48TH STREET 554 PROSPECT PLACE 1062 HANCOCK STREET, BROOKLYN 149-151 WEST 9TH STREET 31 LISPENARD 915 WEST END AVENUE CITY POINT TOWER PHASE ONE SYDNEY HOUSE 733 OCEAN PARKWAY THE PARASOL PROJECT 712 BROADWAY 325 WEST 93RD STREET YWCA OF BROOKLYN ROCHESTER SUYDAM NIHOP 144 WEST STREET, GREENPOINT, BROOKLYN 2457 FREDERICK DOUGLASS BOULEVARD 309 WEST 86TH STREET DAYSPRING COMMONS, 227 ELM, YONKERS ONE DROMORE APARTMENTS

Our Projects Commercial 2 BUSHWICK AVENUE 233 BUTLER STREET, GOWANUS, BROOKLYN 5 EAST 57TH STREET 621 WEST 55TH STREET 79 WALKER STREET ALEXIS BITTAR INC, INDUSTRY CITY AU CHEVAL NEW YORK BRICK NEW YORK BROADWAY VISION BROOKLYN ROASTING COMPANY CITY POINT TOWER PHASE ONE COCKTAIL BODEGA DUTCH KILLS OFFICE BUILDING EAST 55TH STREET FASHION TOWER GALLANT BUILDING HARLEM PROPERTIES MARINER'S HARBOR COMMUNITY CENTER ROGERS AVENUE OFFICE BUILDING THE CHIEF CLUBHOUSE THE COLONY CLUB

Our Projects Residential 535 PARK AVENUE: MULTIPLE APARTMENTS 848 CARROLL STREET, BROOKLYN ST KITTS VILLA PHILLIPSPORT CHURCH HOUSE 347 WEST END AVENUE 138 NORTH 1ST STREET, BROOKLYN, NY 428 GREENWICH STREET, MANHATTAN 133 EAST 91ST STREET TOWNHOUSE, NEW YORK 42 SHARON STREET, BROOKLYN EAST 10 STREET, MANHATTAN TOWNHOUSES

Home / Landmarks 325 WEST 93RD STREET ARCHITECT . Union Street Studio PROJECT SIZE . PROJECT COST . SCOPE . engineering design and approval services for all mechanical, plumbing and electrical systems Go Go Designed by the prolific Upper West Side architect George F. Pelham for the developer Joseph H. Davis, this building was constructed in 1906 as a small multiple dwelling (flats) and once known as the Albea. Located on the north side of West 93rd Street ninety-eight feet east of Riverside Drive, this six-story building faced in red brick with ironspot headers and stone trim is seventy-five feet wide and dumbbell-shaped in plan. The facade is capped by a modillioned metal cornice. An original wrought-iron fire escape is located at the center of the facade. The owners retained Altera Engineering in their bid to renovate and reposition the building as an upmarket rental property steps away from the Riverside park. Altera Engineering's scope included gut renovation of all vacant apartment units and building systems upgrade. A new high efficiency condensing boiler plant was designed to replace an outdated (once coal-fired) steam system. To fully take advantage of the condensing boiler efficiencies, all new hydronic radiators were selected around low water temperatures. Variable speed pumps were selected for low flow, wide delta-t of the water to minimize motor horse power. Domestic water was upgraded with indirect water storage tanks fed by boilers via plate and frame heat exchangers. Altera Engineering team had to work around existing occupied apartments to minimize disruption to tenants. Altera Engineering provided MEP engineering design and approval services for all mechanical, plumbing and electrical systems.

Home / Landmarks 712 BROADWAY ARCHITECT . PROJECT SIZE . PROJECT COST . SCOPE . MEP engineering design and approval services Go Go 712 Broadway is an 8-story landmarked building located in NoHo (North of Houston) historic district. The iron frame, granite and terra-cotta building was constructed as a warehouse in 1893 for the Scholle Brothers. The commercial building designed by Alfred Zucker replaced an 1803 3-story Federal-style mansion, which the Scholle Brothers bought for $88,000 in 1890. NoHo saw its first development by the first decade of the 19th century when John Jacob Astor acquired a large tract of land between Great Jones Street and Art Street (now Astor Place). From 1820 to 1840 the area developed as a fashionable residential district lined with lavish Federal and Greek Revival style residences. New York University was founded in 1831 in nearby Washington Square. Altera Engineering provided MEP engineering design and approval services for a loft apartment, working closely with architects and owners to integrate state-of-the-art mechanical systems into the existing historic features of the apartments.

Home / Landmarks 347 WEST END AVENUE ARCHITECT . Lamb & Rich PROJECT SIZE . PROJECT COST . SCOPE . Morozov provided MEP engineering design and approval services for all mechanical, plumbing and electrical systems. Go Go This Eclectic Renaissance/Revival building was designed with a limestone façade and gabled tile roof by famed architects Lamb & Rich as part of an original row of 14 houses in 1891. The home’s first owner was Charles F. Rand who made his fortune in the mining industry in Cuba and Spain. In the 1950’s, the property was converted to nine apartments, and now the new owners are converting back to a single family residence. The scope of the conversion included an additional set back fifth floor, with an elevator overrun, roof bulkhead, and copper and glass skylight atop it. The current three-story-tall projecting rear yard addition will be demolished and replaced with a four-story-tall rear yard addition. A Juliette balcony, clad in copper, will jut out just into the canopy of a 130- to 140-year-old cherry tree. This is Altera Engineering's third project along the historic West End Avenue, 915 West End Avenue and 309 West 86th Street. The Altera Engineering team worked closely with the architect to thoughtfully integrate new infrastructure into the existing historic shell.

Home / Landmarks 428 GREENWICH STREET, MANHATTAN ARCHITECT . PROJECT SIZE . About 5,500 SF PROJECT COST . $2.5 million SCOPE . Full MEP/FP design Go Go Full gut renovation of a landmarked townhouse located in the historic Tribeca North District. This 5-story, nineteen-foot-wide store and loft building was designed in 1883 by Thomas R. Jackson, an architect who worked extensively in the Tribeca area, for soap manufacturer James Pyle. The utilitarian Romanesque Revival design features red brick façade with rock-faced granite elements, corbelled brick cornice and cast-iron piers. Presently the building houses a Tokyo-style “Edo-mae” Sushi restaurant, which was awarded a single Michelin star in 2014. The upper floors of the building are being converted to a single family residence. Altera Engineering carried upgrades to power, water, sewer utility connections. Altera Engineering worked closely with architects to seal and insulate the original walls in order to minimize the occupants’ dependence on HVAC for comfort. Our engineers worked carefully integrated central heating and cooling systems above the ceilings and behind walls. The building is cooled and heated by a variable-refrigerant-volume system without the use of fossil fuels.

Home / Landmarks 66 READE STREET ARCHITECT . ROART PROJECT SIZE . 25,600 GSF PROJECT COST . withheld SCOPE . Design, approvals and construction administration of mechanical, plumbing, sprinkler, electrical and fire alarm systems. Go Go 66 Reade Street is a boutique luxury condominium in the Tribeca South Historic District. Originally built in 1857 (some sources note 1880), this landmarked cast-iron building was renovated and converted into a modern residential property with commercial spaces. The renovation, completed around 2016, included a sixth-floor addition, a new elevator, and a full interior remodel by Preservation Green L.L.C. and M.Arch Architects. Structure and Units: Stories: 5 to 6 (post-renovation). Units: 7 residential units, including three single-floor apartments and two penthouse duplex condos, plus two commercial spaces on the ground floor. Size: Total building area is approximately 22,207 square feet, with 18,881 square feet residential and 3,326 square feet commercial. The lot measures 50 feet wide by 77.96 feet deep. Notable Features: Units feature rooftop gardens, high ceilings, and downtown skyline views. Recent listings include: Unit 2: 4-bed, 3.5-bath, 3,215 sqft, listed for $6,250,000 (2022). Unit 3: 4-bed, 3.5-bath, 3,215 sqft, listed for $5,995,000 (2022). Unit PHE (Penthouse East): 4-bed, 3.5-bath, 3,778 sqft, listed for $7,995,000 (2022). Amenities: Residential: Virtual doorman (Carson app), video intercom, 561-square-foot gym with Peloton, Tread, and Tonal equipment, private storage units, and a locked package room. Building: Elevator access, restored facade, and a lobby blending historic elements (original columns, pine beams) with modern materials. Location Perks: Near City Hall Park (one block east), Pier 25 (west, with volleyball courts, playgrounds, and Hudson River views), and nine subway lines (R/W, A/C, 1/2/3, J/Z). Tribeca offers dining, arts, and recreation options. History and Ownership: Construction: Built in the 19th century, with significant renovations in 2016. Ownership: Managed by Hieber Reade Street, LLC. The property’s tax-assessed market value is approximately $4,708,000, with an assessed value of $2,074,050. Zoning: C6-2A (commercial/residential mixed-use). Sales History: Records date back to 1966, available via PropertyShark, but no recent sales are listed as active. Median asking price in Tribeca is around $1,540,000, though 66 Reade’s units are priced higher due to luxury status. Current Status: No active residential listings are reported as of the latest data, suggesting units may be sold or off-market. Commercial spaces may still be available, but specific tenant details are not public. The building remains a standout for its historic restoration and modern upgrades, ideal for luxury buyers seeking Tribeca’s vibe.

Home / Landmarks 915 WEST END AVENUE ARCHITECT . PROJECT SIZE . PROJECT COST . SCOPE . Go Go 915 West End Avenue is a 120,000 SF 15-story multifamily building commissioned by a prolific upper west side builder Joseph Paterno (whose initials were inscribed above the entrance), designed by Rosario Candela and completed in 1922 at a cost of approximately $625,000. The building was designed in Renaissance Revival style, and is laid out as two wings around a central core with outer court. Boiler room, laundry facility, oil tank, and incoming services are located in the basement. Lobby and 94 apartments are located on floors 1 through 15. In 2015 the building was included into Riverside-West End Historic District Extension II, and is subject to certain Landmarks restrictions. Following the $ 85.5 million acquisition by a group of investors, Altera Engineering was retained to evaluate the existing heating, plumbing, gas and power distribution systems. Our engineers worked closely with the owner’s architects and marketing team to identify and carry out short payback upgrades to support the investors’ conversion and repositioning program to the ‘best-in-class’ multifamily rental. 915 West End Avenue is one of several Altera Engineering projects along the historic West End Avenue, 347 West End and 309 West 86th Street.

Home / Landmarks 848 CARROLL STREET, BROOKLYN ARCHITECT . TRIARCH PROJECT SIZE . $ 2.5 million PROJECT COST . $ 170,000,000 SCOPE . Full MEP/FP design Go Go Full gut renovation and rear addition to a landmarked townhouse located in Brooklyn’s Park Slope Historic District. The history and development of the Park Slope Historic District is closely related to that of Prospect Park. The area encompassed by the park and the Historic District was the scene of a major battle in the revolutionary war between the Continental Army under George Washington and the British Army in August of 1776. At that time and until the 1850’s this area remained essentially rural, consisting largely of farmland with rolling hills to the east. In sum, the completion of Prospect Park and construction of the Brooklyn Bridge in 1883 were the two major factors in the development of the area. Carroll Street- named after Charles Carroll, a signer of the Declaration of Independence- is one of the most serene and charming streets in the District. 848 Carroll is a neoclassical four-story red brick with limestone trim, was designed by William B. Greenman and completed in 1905 and described in the AIA Guide to New York City as “a narrow bay-windowed neo-classical exile from the Upper East Side” Altera Engineering worked closely with the architect and owners to seamlessly integrate all new building infrastructure into the existing shell. Altera Engineering consulted the owner on high performance building strategies, such as passive heating and cooling, insulation and envelope air-tightness, highly efficient domestic water heating and continuous ventilation with energy recovery. With the exception of domestic water heating, the building does not use natural gas or any other fuel for heating, and is cooled and heated with a variable-refrigerant flow system.

Home / Landmarks 309 WEST 86TH STREET ARCHITECT . PROJECT SIZE . PROJECT COST . SCOPE . assisted with securing Landmarks Preservation Commission approval for installation of rooftop equipment Go Go Development in the Riverside-West End Historic District Extension I went through several phases in the years between the 1880s and 1930s. The earliest phase between roughly 1885 and 1900 saw the construction of speculatively built row houses and flats for the middle and upper classes. By the turn of the century, developers began to focus on constructing larger apartment buildings as increasing construction costs ended row house construction, and the newly opened IRT on Broadway made the Upper West Side more accessible to the city’s expanding population. Legislation such as the 1901 Tenement House Act, the 1916 zoning ordinance, and the 1929 Multiple Dwelling Law contributed to the transformation in the scale of the streetscapes of West End Avenue, Riverside Drive, and West 79th and West 86th Streets where row houses and smaller buildings were replaced by newer, larger buildings.[1] 309-311 West 86th Street was commissioned as a hotel in 1912 by Weymer Hinckley Waitt- a railroad engineer turned hotelier, whose company later built the Weylin Hotel on Madison Avenue. The 12-story 40,000 square foot building was designed by Schwartz & Gross and completed in October of 1914 at a cost of $250,000. Originally known as Hotel Wayne until 1953 when it was converted into the Waldorf Nursing Home. In 1962 it became a residence club for senior citizens. Following interior alterations in 1979 the building was reconverted into apartments and became a co-op known as Stetson House. In 1984 John F Kennedy Jr. and Robert Littell moved in together into a 2-bedroom sublet at 309 West 86th Street. 309 West 86th Street is one of several Altera Engineering projects along the historic West End Avenue 347 West End and 915 West End. Altera Engineering was retained to provide engineering design and consulting services for the owners of the penthouse apartment. The project involved a full floor gut renovation. [1]Landmarks Preservation Commission (LPC), Riverside-West End Historic District Extension I Designation Report (LP-2463)