“The use of natural materials and good ventilation assures the healthiest quality indoor environment. State of the art heating and cooling systems and energy efficient construction provides uncompromising comfort and energy efficiency. ”

Style is the synthesis of experience, innovation and design. Imagine a home designed around you, your family, and the way you live. You talk, we listen. Ideas, thoughts, issues, concerns, and costs, all of it gets considered in the design process. Out of that process, your home will emerge, a vivid, vital expression of who you are, giving your home a unique style you can call your own.

SDG has been a pioneer and innovator in green high performance homes for decades. We have developed numerous building and renewable energy products and technologies to maximize comfort and health while minimizing operating costs and environmental footprint. Our attention to detail results in homes that can be self-sufficient and completely independent of the electricity, water, and sewer grids.

SDG President John Spears has been designing and building healthy, energy-efficient, green, solar homes around the world for over 35 years with an emphasis on self-sufficient buildings and communities. He has designed sustainable communities in Mexico, South Africa, and China, including the Beijing Olympic Village. Over 6,000 of John Spears' Earth Homes™ have been built around the world, and he has consulted on numerous LEED projects.

Browse our Commercial Projects Portfolio

Innovative Materials and Systems - R&D, Testing, Monitoring, Evaluation

We have been on the cutting edge of new materials, building systems and energy systems development for over 33 years. John Spears has developed numerous building and renewable energy products such as:

Solar Heating Systems
Advanced Glazing Systems for Passive Solar Buildings
Ultra Efficient Heating and Air-Conditioning Systems
Radon Control Systems
Passive Solar Greenhouses

We also implemented the Earth Home fully integrated building system for clients such as 3M, Weathershield windows, National Association of Home Builders Research Center, US Department of Energy, EPA and the Gas Research Institute and other private clients.

If you have a new technology, material or building system, we can evaluate it for you. We can also provide field testing and performance monitoring of equipment and whole buildings.