A great thing about East Branch Homes is that they can be fully customized specific to the clients’ needs. They offer a base design that can be executed off the shelf or modified to clients’ specifications.
60 // BERKSHIRE MAGAZINE Spring 2026 up to the windows, and you don’ t feel the draft. There’ s not that usual sense of a little drafty or a little bit of cold.” And during the cooler months, the concrete floor stays warm underfoot instead of icy, because it absorbs and holds warmth, helping the whole room feel even and cozy.
Bronson describes her home’ s interior as“ quiet, simple elegance,” and she compares its air to water:“ The air quality is almost like when you drink really pure water— you know it, something about it just tastes different. The air is just fresher in my home.”
Although Bronson’ s house lands shy of net zero on paper, it still dramatically cuts energy use compared to a conventional build. And, for the sake of argument, it is possible to blanket a field in panels to offset a leaky, energy-hungry building and still claim net-zero status. However, the studio’ s work offers a quieter alternative, where the architecture does as much of the heavy lifting as the technology.
PASSIVE HOUSE AS INVISIBLE INFRASTRUCTURE
“ Fabric first” means prioritizing the performance of the building envelope— its walls, roof, floor, windows, and doors— so the structure needs very little heating or cooling in the first place. That same focus is even more explicit in what the industry calls a passive house.
Instead of a style, it is a voluntary building standard and design method built around a detailed energy model that factors in climate, orientation, and any place heat can sneak through the structure, known as thermal bridges. Where net-zero design focuses on balancing what a building uses with what it produces over a year, passive house is stricter about reducing the energy need in the first place by fine-tuning the envelope. The result is a calm, gallery-like experience, while behind the scenes is a very busy, very sophisticated assembly of insulation, structure, and mechanical systems hidden within the walls.
MULTIPLE PATHS TO NET ZERO
Knowing not every homeowner is ready to leap straight into a ground-up home that’ s so efficient it can cover its own energy needs, East Branch has plotted a spectrum of ways to get started.
“ There’ s just something delightfully unencumbered about it. It’ s so simple, but there’ s something about it; a feeling of ease that I can’ t quite name.”
A pre-designed East Branch home can be quickly tailored to a client’ s site, family, and preferences, which trims the upfront design fees. As Duffy puts it,“ pre-designed homes give both first-time and seasoned clients a template that starts from a different baseline: not just a floor plan, but a highly efficient, healthy structure as the standard building practice, one that respects their time, finances, and environmental priorities.”
On the other end are retrofits: full overhauls or phased upgrades that help existing houses move closer to net-zero performance, improving comfort, air quality, and durability along the way, and allowing homeowners to invest at a pace that fits their budget. For most homeowners, this kind of step-by-step retrofit is the most realistic path into a lighter, more climate-friendly home.
Between those poles are small houses designed to be flexible: compact urban homes and accessory dwelling unit( ADU) projects in which backyard cottages or secondary dwellings are designed to be long-term, livable homes rather than future demolition debris.
Bronson’ s project sits at that flexible end, She sized the septic system larger than the current house requires to leave room for future growth and is already conceptualizing ideas for an ADU as her family grows.“ There’ s a kind of compound feeling that is beginning to emerge, but it’ s not fully formed yet,” she says, imagining future space for children and grandchildren.
DESIGNING TOMORROW’ S“ OLD HOUSES”
New England’ s most beloved farmhouses often survived by accident: uninsulated and leaky, they quietly dried out between storms as heat bled through the walls. Today, well‐intended quick efficiency fixes can trap moisture instead, creating problems behind freshly tightened shells. For example, adding