Insulation & air sealing
Full, tight, uniform insulation coverage and every joint, penetration, and opening sealed during framing. This is where the performance actually lives.
Zero-energy building
Zero-energy custom homes, built for Cape Cod
Homes that produce as much energy as they use—a high-performance envelope, heat pumps, and rooftop solar, built by a Cape builder with more than 40 years of local experience.
Established 1983
Family owned
Owner on site
Licensed & insured
What zero-energy means
A home that pays its own energy bill
A zero-energy (net-zero) home produces roughly as much energy over a year as it consumes. It gets there in three moves: a superinsulated, air-sealed envelope; efficient all-electric systems; and rooftop solar sized to cover what's left.
The simplest way to measure it is the HERS Index—the standard energy score for homes. A typical older Cape home scores well above 100. A new code-built home lands lower. A zero-energy home reaches 0 with solar. Lower is better, and every choice we make on these projects moves the number down.
The envelope comes first, always. If the walls, roof, and windows leak, you're paying to condition air that goes straight outdoors—and every system downstream has to be bigger to keep up. Get the envelope right and the heating system shrinks, the solar array shrinks, and the house stays comfortable in a February wind off Buzzards Bay.
- Superinsulated, air-sealed envelope—sealed during framing, when it's easy to reach
- Efficient all-electric heating, cooling, and hot water
- Rooftop solar sized to the home's actual annual use
- Performance verified by independent testing, not guesswork
How we build it
The systems behind a zero-energy home
No single product makes a home zero-energy. It's a stack of decisions that work together—envelope first, equipment second, solar last.
High-performance windows
Triple-pane or high-performance glazing, flashed and sealed correctly at the frame. A good window installed poorly is a leak with a nice sticker on it.
Air-source heat pumps
One system that heats, cools, and dehumidifies—proven in New England cold and well suited to the Cape's damp summers.
Heat-pump water heating
Heat-pump water heaters cut hot-water energy use sharply and dry the basement as they run.
Balanced fresh-air ventilation
An ERV supplies continuous fresh air while recovering heat from outgoing air—so a tight house is also a healthy one.
All-electric kitchen
Induction-ready, all-electric kitchens—no fossil-fuel appliances, no combustion byproducts indoors.
Rooftop solar
An array sized to the home's modeled annual use, planned with the roof design and orientation from the start rather than bolted on later.
Monitoring
Energy monitoring so you can see production and consumption—and confirm the home is doing what it was designed to do.
What it costs
Honest math, up front
A zero-energy home costs more to build than a code-minimum home—better insulation, better windows, better mechanical systems, and a solar array are real line items. We won't pretend otherwise.
What you get back: dramatically lower—or near-zero—utility bills for the life of the house, protection from fuel-price swings, and a home that's quieter, more comfortable, and more durable because the same details that save energy also keep moisture out of the walls.
What offsets it
Incentives that shape the numbers
Federal and state programs offset part of the premium. The federal 45L new-home credit provides up to $5,000 for homes certified to the DOE Zero Energy Ready standard—a credit that goes to the builder and shapes project economics. Mass Save offers incentives for heat pumps and envelope work.
Programs change, so we don't publish numbers that go stale. DC Builders walks through the current incentives and what they mean for your project at the consultation.
Talk through the numbersAlready own a Cape home?
Also improving an existing home?
You don't need a new build to cut your energy bills. The same payback-first thinking applies to existing capes and ranches: air sealing before insulation, insulation before equipment, equipment before glass—and any remodel that opens walls is the cheap moment to do the work.
Start with our guide to energy upgrades that pay back first, then see 10 moves that cut a Cape Cod energy bill.
Go deeper
The zero-energy reading list
Four guides from the DC Builders blog on how we build for lower bills—and how to get there in an existing home.
How the work moves forward
From first conversation to power on
Consult
Discuss the property, goals, budget, energy targets, and desired timing.
Design & energy modeling
Plan the home and model its energy use, so the envelope, systems, and solar array are sized to hit the target—on paper, before framing.
Build & verify
Construct with hands-on oversight and verify performance with blower-door testing and a HERS rating from an independent rater.
Power up
Commission the solar array, walk through the systems and monitoring, and hand over a home that pays its own energy bill.
“Seal first. A tight envelope means every system downstream can be smaller and run less.”
DC Builders’ approach to energy-smart constructionRelated services
One builder for the whole project
Zero-energy performance runs through everything we build—new homes, additions, and remodels alike.
New home construction
Custom homes planned for your property and built for coastal New England conditions, from site work to final walkthrough.
Explore new home constructionHome additions
Primary suites, family rooms, garages, and in-law space—with the envelope sealed and insulated while the walls are open.
Explore home additionsKitchen remodeling
Functional, well-built kitchens—including induction-ready, all-electric layouts—with coordinated cabinetry and finish work.
Explore kitchen remodelingBathroom remodeling
Bathrooms rebuilt for daily life—tile, fixtures, ventilation, and moisture management done right.
Explore bathroom remodelingDecks & outdoor living
New decks, replacements, and porches built with stainless hardware and flashing details chosen for salt air.
Explore deck buildingAll construction services
Whole-home remodeling, roofing, siding, windows, and the rest of what a Cape Cod home needs over its life.
See all servicesZero-energy questions
Before you build
What is a zero-energy home?
A zero-energy (or net-zero) home produces roughly as much energy over a year as it consumes. It gets there with a superinsulated, air-sealed envelope, efficient all-electric systems like heat pumps, and rooftop solar sized to cover the home's annual use.
What is a HERS rating?
The HERS Index is the standard energy score for homes, and lower is better. A typical older Cape home scores well above 100, a new code-built home lands lower, and a zero-energy home reaches 0 with solar. An independent rater verifies the score with testing during and after construction.
Does a zero-energy home cost more to build?
Up front, yes—better insulation, windows, mechanical systems, and solar add cost compared to a code-minimum build. That premium is offset over time by dramatically lower or near-zero utility bills, and federal and state incentive programs cover part of it. Programs change, so we walk through the current numbers for your project at the consultation.
Do you also do energy-focused remodels of existing homes?
Yes. Air sealing, insulation, heat pumps, and envelope work fold into additions, remodels, roofing, and siding projects—any time the walls are open is the cheap moment to improve performance. We take existing Cape homes through the same payback-first thinking we use on new builds.
Does zero-energy construction work with Cape Cod weather?
Yes. Modern cold-climate heat pumps are proven in New England winters, and they dehumidify in the Cape's damp summers. A tight, well-insulated envelope handles humidity, wind-driven rain, and nor'easters better than a leaky one, not worse—sealed walls keep moisture out of the cavities where rot starts.
How do I get started?
Call (508) 388-5120 or use the consultation request form. Bring your site or property information, any plans or inspiration, and your priorities—we'll talk through goals, budget, energy targets, and realistic timing.
Start the conversation
Ready to build a home that pays its own energy bill?
Tell us about your property, your priorities, and the home you want to create.