2026 RDAA | Custom Period or Vernacular Renovation | Accabonac House | Berg Design Architecture

The 1990s modernist house was striking with its steep, shingled roofs atop a divided concrete base, but John Berg, AIA, saw opportunities for improvement while respecting the design by Charles Forberg. “He shut down the principal views to the water and had a number of spaces with awkward head height that weren’t that usable,” John says.

The renovation “elevated the house quite significantly,” the jury noted. It enclosed the breezeway entry between the divided first floor in high-performance glass, unifying circulation. A floor plate inserted into the double-height art studio and carefully proportioned dormers cut into the pitched roofs increase livable space without diminishing the geometric silhouette.

Oversized 9-foot doors replaced standard doors, allowing in greater daylight past deep eaves and improving views of Accabonac Harbor. A custom steel pergola over an extended pool deck echoes the language of the dormers.

Along with upgrading the building envelope and electrifying utility systems, the project updated interior finishes. Maple veneer replaced a plywood ceiling finish that had assumed a green cast, vibrant blue wall tile enlivens the kitchen, and slatted wood screens and a perforated metal-screen bridge railing complement the owner’s eclectic furniture and art collections. “It took us a while to mix their industrial and Japanese farmhouse aesthetics with this existing modernist building,” John says, “but it all works well together.”





Accabonac House by Berg Design Architecture

East Hampton, New York


Project Credits

Architect: John Berg, AIA, principal in charge; Alexander Chaintreuil, project architect, Berg Design Architecture, New York

Builder: Peter Germano, Germano Builders, East Hampton, New York

Project size: 5,990 square feet

Site size: 2.2 acres

Construction cost: Withheld

Photography: Simon Howell Photography


Key Products

Appliances: BlueStar (range), Faber (ventilation hood), Bosch (dishwasher, icemaker, oven), Dacor (refrigerator), LG (washer/dryer), XO (wine refrigerator)

Cabinetry: Reform

Cabinetry hardware: Reform

Cladding: Alaskan yellow cedar

Countertop: Caesarstone

Door hardware: Emtek

Faucets: Hansgrohe (kitchen, shower), Kohler (secondary)

Finish materials: Heath Ceramics

Fireplace: Rais

Heat pump: Mitsubishi Electric

Housewrap: Henry, A Carlisle Company

Lighting control systems: Lutron

Lighting, exterior: B-K Lighting, Hinkley

Lighting, interior: Nora Lighting

Millwork and trim: Alaskan yellow cedar

Paint: Bona (interior)

Pergola: Steel, Alaskan yellow cedar

Photovoltaic system: GreenLogic

Roofing: Alaskan yellow cedar

Shower: Heatgene (outdoor)

Sinks: House of Rohl (kitchen); Kohler (primary bath); Duravit (secondary); Kraus (utility)

Thermal and moisture barriers: GCP

Toilets: TOTO

Vanities: Reform

Ventilation, bathroom: Fantech

Window shading: Hunter Douglas

Window wall systems: Alvio

Windows: Alvio