Rye Barn Renovation | Barn Residence Deep Energy Retrofit

A HOME IN NEW HAMPSHIRE THAT REFLECTS YOUR VALUES

Custom Home Architects
in New Hampshire

Award-winning architecture for New Hampshire homeowners creating a custom home that's beautiful, comfortable, and built for the way you want to live across the seasons.

Sustainable Architecture Tailored to How You Live

For over 20 years, ZeroEnergy Design has created custom homes and significant renovations across eastern Massachusetts, New Hampshire, and across New England, working with families building primary residences, second homes, and lakefront retreats. As custom home architects, we bring that same approach to projects from the Seacoast towns of Portsmouth, Rye, and Exeter to the Lakes Region around Winnipesaukee and Squam, the Upper Valley near Hanover and New London, and the communities of southern NH just over the Massachusetts border. We design distinctive residences that respond to their sites, complement neighborhood character, and deliver exceptional comfort and performance. Whether the project is a new Passive House on a wooded lot or a net-zero renovation of an antique Cape, our integrated team brings architecture, mechanical design, and sustainability expertise together from day one.

Custom Home Architects in Portsmouth and the Seacoast

Portsmouth is one of New England's oldest cities, and its housing stock reflects that depth. Federal and Georgian merchant homes line the streets near the harbor, Colonial Revival residences anchor the established neighborhoods, and shingle-style coastal homes define the surrounding towns of Rye, New Castle, North Hampton, and Hampton. The city also has a substantial Historic District covering much of downtown and the surrounding residential blocks, which means new construction and renovation projects in those areas require review by Portsmouth's Historic District Commission.

As architects working across New Hampshire's Seacoast, we approach these projects with attention to what makes the region distinct: coastal exposure, salt air, FEMA flood zones for waterfront properties, and an architectural vocabulary built up over more than three centuries. Whether the project is a renovation in Portsmouth's South End, a new build in Rye or New Castle, or a coastal home along the North Shore Atlantic frontage, our approach is the same: distinctive design that responds to its setting and performs at the highest standard.

Passive House Architects in New Hampshire

New Hampshire's climate makes a strong case for Passive House design. Cold winters, hot humid summers, and significant temperature swings mean an ordinary home loses energy in every direction, year-round. A Passive House envelope, with continuous insulation, careful air sealing, high-performance windows, and balanced ventilation, eliminates most of those losses and creates a home that's quiet, comfortable, and dramatically less expensive to operate. New Hampshire's larger lot sizes also mean that solar access is often excellent, which makes pairing a Passive House with on-site solar generation a natural fit. Importantly, none of this dictates how the home looks. A Passive House in New Hampshire can read as a classic New England farmhouse, a traditional shingled lake house, or a modern coastal home. The performance lives behind the wall.

Featured New Hampshire Projects

Barn Residence Deep Energy Retrofit

For this renovation of a 6,500SF vast post and beam New England barn, opportunities were seized to re-allocate space, redefine ceiling heights, create a continuous super-insulated thermal envelope of 2800SF, and focus on the opportunities presented by the building’s existing orientation and siting.

Rye Barn Renovation

A modern two-story house with dark green siding, large windows, and a red front door, surrounded by trees and snow on the ground.

Phased Deep Energy Retrofit and Accessory Dwelling Unit

A New Hampshire house in the woods, which features a new accessory dwelling unit to support multigenerational living. This phased deep energy retrofit will improve energy performance and thermal comfort for the entire home, while also providing gratifying views and natural connections.

Hanover ADU

A house under construction in a wooded area with trees and a clear blue sky, construction materials and equipment visible around the site.

Recognition & Credentials

AWARDS & RECOGNITION

  • Best of Boston Home 2020: Best Sustainable Architect

  • Architect Magazine Top 50 Nationwide for Sustainability

  • Best of Houzz Design Award (2012 - 2026)

  • AIA Small Firms/Small Projects Award

  • PRISM Awards Gold Winner

CERTIFICATIONS

  • Five Certified Passive House Consultants on staff

  • WBE-Certified firm

  • Expertise in PHIUS+ Certification, LEED, Living Building Challenge, and REVEAL

MEDIA COVERAGE

Featured in: New York Times, Architectural Digest, Forbes, Dwell, New England Home, Boston Home, Boston Globe, Fine Homebuilding, Modern Luxury Interiors Boston, Green Building & Design, and Northshore Home. Energy expertise featured on NPR.

BSA Sustainable Design Award badge
Best of Boston Home 2020 Best Sustainable Architect award
106.5 percent average energy reduction across all ZeroEnergy Design projects
Certified Women’s Business Enterprise (WBE) badge
Five PHIUS Certified Passive House Consultants on staff
Architect Magazine Top 50 for Sustainability award badge
Best of Houzz 2026 Design Award badge

Frequently Asked Questions

Designing Custom Homes in New Hampshire

New Hampshire is home to roughly 1.4 million residents across nine counties, with a built environment shaped by the state's varied geography. Its housing stock ranges from 18th-century Federal and Greek Revival homes in Portsmouth and Exeter to shingled coastal homes along the Seacoast, classic lake houses around Winnipesaukee and Squam, mid-century modernist residences in college towns like Hanover and New London, and contemporary new construction across the Lakes Region and southern NH. Building regulations vary town by town, with shoreland protection rules, septic requirements, and local preservation ordinances all shaping what's possible. New Hampshire's combination of architectural variety, generous lot sizes, and homeowners who value craft and longevity makes it a strong fit for our approach to renovation and new construction.

Locations are approximate. Cities/Towns and Neighborhoods are listed to protect our clients’ privacy.

Let's talk about your New Hampshire project

Whether you're planning a new custom home, a major renovation, or exploring what's possible on a property you're considering — we're here to help.

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