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Acorn Glade Passive House | 4737 Puffer Road, Downers Grove, IL 60515  view map 
This modern house provides a serene environment on a rare secluded lot in Downers Grove

SIZE: 1,800 square feet

PROJECT TYPE: Single Family – New Construction

Passive House (PHIUS+2015) (Pending)
DOE Zero Energy Ready Home (Pending)
GreenStar (Pending)
HERS Rating (Pending)

Tom Bassett Dilley Architect, Ltd.
216 Harrison, Oak Park, IL
TBDA is a nationally recognized firm specializing in high-performance, healthy, and Passive House architecture for new building and renovations.

Evolutionary Home Builders (formerly Weiss Building & Development LLC)
200 S. Third St., Geneva, IL 60134
Builder specializing in third party certified quality homes. Nationally awarded for building science, indoor air quality, energy efficiency and sustainability.

Eco Achievers
1647 W Fulton St, Chicago, IL 60612
EcoAchievers provides consulting, energy rating, and third-party verification services to help deliver sustainable, high-performance homes. Experience with Energy Star, LEED, NGBS, and GreenStar programs.

The Evolutionary Home/Evolutionary Supply & Building Solutions
200 S. Third St., Geneva, IL 60134
630-485-1818/ 312-952-5451
Retail store and design studio specializing in home goods, decor, and furniture that integrate high design with health and sustainability.

Also, a building supplier specializing in everything builders and architects need to build sustainable, healthy, energy efficient, and durable homes.  Building Solutions is a one stop shop for materials from foundation to furnishing that have all been vetted to perform at the highest level.

Landscape Design:
Nathan Wright Landscape Design
Oak Park, IL


Project Website:






This 1,800s.f. Passive House (seeking PHIUS+ certification) is designed to harmonize with its site by taking advantage of the sun, views to mature oak trees, and its quiet setting at the western edge of Downers Grove. The interior is organized around a large south opening to a courtyard-like patio space; as a backdrop to this opening is a wall featuring walnut from trees harvested on site. Openings in this feature wall bring natural light deep into the house. As a Passive House, it uses about a tenth the heating energy of a built-to-code home, and about 65% less energy overall; it is also designed to be Zero Energy Ready, meaning that with the addition of a solar electric array, the house can produce as much energy as it uses. Indoor air quality and occupant health are a primary objective as well, so no-added-formaldehyde panel materials, no-VOC, non-toxic paints, and Greenguard certified sealants, caulks, and adhesives were used along with a continuous demand-controlled ventilation system to provide superior air quality.