Trillium Architects is a 7 person, full service, boutique architectural firm specializing in Passive House, Net-Zero and off-the-grid new homes, additions, and renovations. Based in Ridgefield, CT, we primarily work in western Connecticut and New York's Hudson Valley, but we've designed homes all over the country.

In 2015 and 2016 we won awards for Best Energy Efficient Home in the USA from both the USGBC and the DOE, we won a 3rd Place International Innovation award which we accepted at the United Nations Framework Convention on Climate Change in Morocco 2016, and we won Best Emerging Firm in CT from the AIA in 2016.

With the end goal of marrying beauty, usability, and the cutting edge of efficient design, we strive to always make the client experience of building or renovating their home top notch.

Featured

Tree house! Unfortunately there will be drywall going up eventually. #coastalmodern

Today is the day! #WestchesterPassiveReno House tour! Stop by and see what's behind the walls of a Passive House! 4 Ward Place, Ossining 1-4

Our #WestchesterPassiveReno House tour is tomorrow ~ Hope to see you there.

#trilliumarchitects⠀ #Westchesterpassivereno

Part 2 of the super comfortable basement at WestchesterPassiveReno is the exterior. The ICFs have been sealed against moisture, more insulation protects against both punctures and cold, and a drainage membrane with footing drain moves water away from the walls. It’s not glamorous, but it is very important. And when we’re finished you won’t see any of it! #TrilliumArchitects

Horizontal clear White Cedar from Maine. Installed on a rain screen at the garage. Can't wait to see it vertically on the rest of our Coastal Modern!

Many of our houses achieve Net Zero or Passive House. We also build what we call a "pretty good house". In this house the home owner went from a $1,500 per month heating and cooling bill to $350! We love to hear from our happy clients! #trilliumarchitects

The basement over at #WestchesterPassiveReno is going to be the envy of the homeowners everywhere. With ample insulation and a water-tight seal on the walls and floor it’s guaranteed to be warm, dry, and comfortable. Here you can see the inside of the insulated concrete forms, 2 layers of insulation that will sit under the floor, and the heavy duty vapor barrier sandwiched between to keep everything dry. #TrilliumArchitects

Spring has finally arrived at #CoastalModern! The unfinished exterior is still quite noticeable, but as the leaves unfurl and the exterior finishes go on the house will begin to look integrated with the site. Stay tuned to see this exciting transformation! #TrilliumArchitects