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

Full MEP/FP design ARCHITECT Z Proekt PROJECT LOCATION 1020 Rogers Avenue, Brooklyn PROJECT SIZE PROJECT COST SCOPE Full MEP/FP design / COMMERCIAL PROJECTS ROGERS AVENUE OFFICE BUILDING The building at 1020 Rogers Avenue, Brooklyn, NY 11226, known as The Veronica, is a seven-story mixed-use development in the Flatbush neighborhood, completed in 2025. Here are key details: Structure and Use: It has 78 units, primarily residential, with 75 residences and commercial spaces on the ground floor. The building includes retail and office spaces, with current leasing options for 1,720 to 9,871 square feet, featuring central HVAC and floor-to-ceiling windows. It’s designed by Zproekt Architects and developed by Oleg Krasnitsky under 1020 Rogers Avenue LLC. Residential: An affordable housing lottery launched for 23 units targeting residents at 130% of the area median income (AMI), with eligible incomes ranging from $72,000 to $218,010. No units are currently listed as available for rent or sale. Commercial: The property offers high-traffic exposure at the corner of Rogers Avenue and Beverley Road, near major retailers like Target, Chase Bank, and Dunkin’. It’s close to public transit, including the B49 bus and 2/5 subway lines. History: The site was previously vacant land sold for $2,200,000 in September 2016, zoned R6 for residential development with a 2.43 floor area ratio (FAR). It was marketed as ideal for condos, apartments, or townhouses. Amenities and Features: Includes a 13-car parking garage and bike storage. The building is noted for its modern design and proximity to schools, parks, and transit hubs like Gates Avenue Station (J/Z trains). Go Go

347 WEST END AVENUE, NY ARCHITECT Lamb & Rich PROJECT LOCATION 347 WEST END AVENUE, NY PROJECT SIZE PROJECT COST SCOPE MEP engineering design / RESIDENTIAL PROJECTS 347 WEST END AVENUE 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. Altera Engineering provided MEP engineering design and approval services for all mechanical, plumbing and electrical systems. Go Go

St Kitts Villa, St Kitts ARCHITECT PROJECT LOCATION St Kitts Villa, St Kitts PROJECT SIZE PROJECT COST SCOPE / RESIDENTIAL PROJECTS ST KITTS VILLA St. Kitts, part of the Federation of St. Kitts and Nevis, is known for luxury villas, often beachfront or hillside, catering to vacationers, investors, and those seeking citizenship-by-investment properties. These villas are typically modern, with amenities like private pools, ocean views, and proximity to attractions like Frigate Bay, Christophe Harbour, or the Royal St. Kitts Golf Course. Go Go

133 EAST 91ST STREET TOWNHOUSE, NEW YORK ARCHITECT Ben Fuqua PROJECT LOCATION 133 EAST 91ST STREET TOWNHOUSE, NEW YORK PROJECT SIZE About 4,500 SF PROJECT COST $ 5 million SCOPE Full MEP/FP design and construction administration services / RESIDENTIAL PROJECTS 133 EAST 91ST STREET TOWNHOUSE, NEW YORK A full gut renovation and conversion of a multifamily building into a single family townhouse. 133 East 91st Street is one of six identical Queen Anne rowhouses completed in 1896 for a local developer John Weber. The building retains its original façade of red brick and brownstone along with a raised stoop and paved entry court, and a 20-ft rear garden. Altera Engineering worked hand in hand with the architect to seamlessly integrate all new heating/cooling and other building infrastructure into 17.5-foot wide 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. Highly insulated envelope, and not relying on gas for heating are expected to save 20 metric tons of Carbon Dioxide emissions on an annual basis. Go Go

Our Projects Hospitality MULTIFAMILY COMMERCIAL HEALTHCARE HOSPITALITY RESIDENTIAL LANDMARKS CULTURAL DELAMAR MYSTIC 52-09 31ST PLACE, LONG ISLAND CITY, NY MARRIOTT COURTYARD HOTEL ON W 30TH STREET EXECUTIVE LE SOLEIL HOTEL HYATT PLACE MIDTOWN

NA Go Go / HOSPITALITY DELAMAR MYSTIC Overview: Delamar Mystic is a waterfront hotel blending maritime history with modern elegance, offering views of the Mystic River and proximity to Mystic Seaport. It’s part of the Delamar Hotels brand, known for coastal New England properties. Structure and Features: Rooms: 31 rooms and suites with floor-to-ceiling windows for river views. Event Space: A 2,600-square-foot ballroom and a waterfront event lawn for weddings, corporate events, and private parties. Dining: La Plage Restaurant, an oyster bar and coastal cuisine spot seating up to 90 indoors, focusing on local seafood, produce, and sustainable meats. Amenities: Guest-only swimming pool, free Wi-Fi, and parking. The design incorporates nautical elements like vintage maps and artisanal furnishings. Size: Specific building dimensions are not listed, but it’s a multi-story structure tailored for boutique hospitality. Location: Situated in Mystic’s historic district, near Interstate 95, Mystic Seaport Museum (75 Greenmanville Ave), and downtown Mystic. It’s a short walk to attractions like Mystic Aquarium and Olde Mistick Village, making it a hub for tourists. History: The site was previously home to Latitude 41 Restaurant, which closed in July 2022, with plans reported for its demolition to make way for this hotel development. Delamar Mystic was announced as a new addition by Delamar Hotels, with construction and opening details finalized post-2022. Exact completion dates are not specified, but it’s operational as of 2025. ARCHITECT NA PROJECT LOCATION 105 Greenmanville Ave, Mystic, CT 06355 PROJECT SIZE NA PROJECT COST NA SCOPE NA

Our Projects Landmarks MULTIFAMILY COMMERCIAL HEALTHCARE HOSPITALITY RESIDENTIAL LANDMARKS CULTURAL BROOKLYN ROASTING COMPANY 915 WEST END AVENUE 79 WALKER STREET 848 CARROLL STREET, BROOKLYN 347 WEST END AVENUE EAST 10 STREET, MANHATTAN TOWNHOUSES 309 WEST 86TH STREET 133 EAST 91ST STREET TOWNHOUSE, NEW YORK 712 BROADWAY 428 GREENWICH STREET, MANHATTAN 325 WEST 93RD STREET 66 READE STREET

Go Go / LANDMARK PROJECTS 66 READE STREET 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. ARCHITECT PROJECT LOCATION PROJECT SIZE PROJECT COST SCOPE

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

full MEP design and construction administration services ARCHITECT PROJECT LOCATION PROJECT SIZE PROJECT COST SCOPE full MEP design and construction administration services / COMMERCIAL PROJECTS 621 WEST 55TH STREET A 22,000 square foot ground up high rise commercial office building in New York city. This boutique building contains 8 full floor offices above a 3-level parking garage. 621 West 55th Street is being designed to meet US Passive House Institute standards for energy efficiency. Passive House standard emphasizes air-tight, continuously insulated building envelope without thermal bridges, high performance windows and balanced heat and moisture recovery ventilation. Passive House buildings are expected to consume 75-90% less energy than traditional buildings. The biggest challenge for MEP systems was to minimize the impact of the high rise MEP system requirements on an relatively small floor plate (2,400 SF). A fire protection tank, standpipe, generator, ventilation systems all eat up valuable floor area and the project becomes less financially viable. The Altera Engineering team worked closely with the architect to optimize MEP systems to achieve the largest possible usable area. The building is cooled and heated with a variable-refrigerant system. Packaged rooftop energy recovery ventilator filtered and conditioned fresh air directly into each office in a continuous ventilation cycle. MEP systems include a 150-kW emergency generator with a diesel tank, an underground suction tank for fire protection, and reversible air-flow parking garage exhaust system with post-fire smoke purge functionality. Go Go

138 North 1st Street, Brooklyn ARCHITECT Will Corcoran Architect PROJECT LOCATION 138 North 1st Street, Brooklyn PROJECT SIZE About 4,500 SF PROJECT COST $3 million SCOPE full MEP design and construction administration services / RESIDENTIAL PROJECTS 138 NORTH 1ST STREET, BROOKLYN, NY A ground up construction of a luxury single family home in Williamsburg neighborhood of Brooklyn. An inaugural project for a nascent developer required careful attention to detail. Altera Engineering worked hand in hand with the architect and developer to craft solutions that worked with the owner’s vision for the building. Altera Engineering efficiently and successfully secured utility connection approvals and assisted the client in resolving filing and approval issues. Altera Engineering consulted the owner on high performance building strategies, such as passive heating and cooling, insulation and envelope air-tightness, intelligent lighting controls, 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. Highly insulated envelope, and not relying on gas for heating are expected to save 20 metric tons of Carbon Dioxide emissions on an annual basis. Go Go