FLEXHOUSE
net zero, semi-custom homes
FLEXHOUSE is North River’s line of semi-custom home plans—created to make building beautiful, net zero homes more accessible and cost-effective. Each FLEXHOUSE model starts with a simple architectural framework that can be adjusted to reflect your needs, your site, and your lifestyle. These homes are modern, adaptable, and designed from the beginning with the highest energy performance in mind.
By using a shared foundation of three simple design principles we’re able to lower the cost of the project and ensure that every build meets our highest standards of sustainability and performance without sacrificing that custom feel.
simple shape
Four walls and roof. The rest is personal touch.
clear structural span
Load is carried entirely by external walls so your interior can change with you.
efficient envelope
Minimize heat loss and air leakage, maximize comfort and energy efficiency.
Think of our four FLEXHOUSE models as starting points, to be shaped by collaboration and always turn out unique. Explore these adaptable, energy efficient home plans, photos from finished projects, and add-ons below. Reach out for more info when you’re ready.
FLEXHOUSE models
Each FLEXHOUSE model includes general specs, architectural sketches, and real-life project photos. These energy efficient home designs serve as flexible templates—consistent in performance, varied in appearance. And remember, the details are up to you. Flat roof instead of gabled? Can do. Add a covered porch? On it. Want an off-grid home? You got it.
FLEXHOUSE I
1,000 sq ft 1 bedroom, 1 full bath
This compact dwelling is perfect for a weekend cabin or a rental. Designed for smaller lots or secondary dwellings, FLEXHOUSE I still makes room for an open-plan kitchen, spacious bathroom, and lots of light.
FLEXHOUSE II
1,200 sq ft 2-3 bedrooms, 1 full bath
Balanced in scale but with bold, vaulted ceilings, this model offers flexible living spaces ideal as a getaway or small family dwelling. Plenty of windows and an optional covered porch add to its expansive feeling.
FLEXHOUSE III
2,200 sq ft 3-4 bedrooms, 3 full baths
Built for households that need flexibility over time—and love the drama of high ceilings. Multiple bedroom/bathroom configurations from 2 bed/1 bath to 5 bed/3 bath. Generous common areas and smart storage solutions.
FLEXHOUSE IV
Up to 3,200 sq ft, 2-5 bedrooms, 2-4 baths
The two-story layout is ready for your vision: home office, studio, bedrooms, storage, and more. The footprint can accommodate anywhere from 1,800-3,200 square feet of living space and be divided for your unique needs.
additional structures in the FLEXHOUSE system
Beyond the primary home models, the FLEXHOUSE approach extends to outbuildings and alternative formats, all designed with energy efficiency, simplicity, and adaptability in mind.
outbuildings
Many FLEXHOUSE projects include additional structures that support daily life, creative work, or long-term flexibility. Detached garages, home studios, guest houses, and storage sheds can all be designed in the same architectural language as your primary home, allowing the full site to feel cohesive and intentional. These buildings follow the same principles of simplicity, durability, and energy efficiency—whether you’re adding a small garden shed or planning a studio with plumbing and power.
looking for fully custom, sustainable home designs?
Many of our projects are custom designs. But custom doesn’t have to mean starting from ground zero. If the design principles and energy efficient home plans of FLEXHOUSE appeal to you but you want something 100% tailored, reach out to us. You can still benefit from some of the same cost savings, time efficiencies, and design templates.
Many clients begin by working with us to select or evaluate a parcel of land. If that’s you, learn more about how we help with land selection, permitting, and early planning steps.
experience a FLEXHOUSE
If you’re curious what it’s like to live in a FLEXHOUSE, you can book a stay at the Sun Cottage, a real-life FLEXHOUSE I model, or Napanoch House, a FLEXHOUSE II, for short-term rental on Airbnb. It’s a rare chance to experience the space, light, and comfort of a net zero home before building your own. Staying there won’t answer every question, but it might help you feel what’s possible.
FLEXHOUSE FAQs
What’s the benefit of starting with a FLEXHOUSE model instead of a fully custom design?
FLEXHOUSE models can reduce upfront design costs and streamline project timelines, while still allowing for meaningful personalization. Each model is grounded in energy efficient home design principles, so there’s no compromise on performance.
How customizable are FLEXHOUSE models?
Very. We’ve seen clients change window layouts, floor plans, finishes, and more. You’ll collaborate with our team during the architectural phase to tailor the design to your site and needs.
Is a FLEXHOUSE the same as a modular home?
Not exactly. Our main FLEXHOUSE models are site-built using traditional construction methods.