The GreenStar program is a holistic, above-code certification system that can be used for renovations, home additions, and new home construction. While some of the national home certification programs, such as LEED, are only designed for new home construction or complete rehabs of older homes, the GreenStar program is also available for minor retrofits or renovations. The GreenStar program is also part of the LEED for Homes Affiliate Program.

Because this certification program is available for all different home renovations, different construction and real estate professionals can become certified, including electricians, interior designers, architectural firms, appliance retailers, and real estate agents.

The holistic building standards for the GreenStar certification program are specifically intended to respond to the unique climatic conditions of the upper Midwest. Third-party verification is also an essential part of all GreenStar certified homes.

Five Pillar and Seven Components

The GreenStar certification program is centered on five essential pillars of home construction: energy, health, water, materials, and place. To receive certification, homes must make significant efforts to implement green building practices in each of these five pillars. The program looks at how each of these pillars is systematically affected by the seven main components of a home: outdoor/site, building envelope systems, mechanicals, electrical/lighting, plumbing systems, and fixtures finish materials and coatings, and waste management.

For example, the GreenStar checklist looks at how plumbing systems, outdoor/site considerations, and waste management in the home affect the overall health and quality of water inside the house and the surrounding environment.

The GreenStar certification program offers three different certification levels: bronze, silver, and gold, with gold certification, which is the most rigorous and complete.

The checklist for certification is extremely in-depth and an excellent tool for homeowners, builders, and remodelers to use as they design the specific aspects of the green home they are designing. You can learn more about access the free GreenStar checklist here and sign up to access the checklist here. Both the checklist and the GreenStar building manual are free.

GreenStar Remodeling Manual

As we mentioned above, one of the main benefits of the GreenStar Program is that it is open to all different types of remodels. Instead of completely gutting your home for a complete renovation, the GreenStar remodeling manual (found here) specifies four different types of remodeling projects, including:

• Renovations that do not add air-conditioned space
• Renovations that add air-conditioned space without changing the shell of the building
• Renovations that add air-conditioned space change the existing shell of the building but do not add a new foundation, and
• Renovations that add air-conditioned space change the existing shell and add a new foundation.

Home remodels have to follow prerequisites, including submitting two years’ worth of utility bills to GreenStar, one year before the project, and one year after the project. This helps to monitor the energy performance of the remodel using ENERGY STAR appliances. Doing so generates a detailed site plan showing natural resources, erosion control, project-related site information, and a water conservation plan indoors and outdoors.

A Refurbished GreenStar Certified Home

While hundreds of homes across the Midwest have achieved GreenStar certification, one home renovation project exemplifies how this project can be helpful to homeowners looking to renovate older homes to improve their sustainability performance without tearing the existing house down to build new.

A 123-year-old home in Northern Minneapolis might seem like a recipe for drafty windows and highly high heating bills. Instead of tearing down this old home, a major renovation project was undertaken, which eventually led to GreenStar gold certification. This home almost achieved a net-zero carbon footprint while maintaining an affordable housing budget.

The home renovation included a 3.2 kW solar PV array, R27 insulated walls, .15 U Value replacement windows, and motion and photo sensors for all LED lighting. The home also replaced flooring and doors throughout the home with FSC certified wood products while rain gardens could absorb the vast majority of stormwater runoff. Instead of being torn down, this home was able to be revitalized into a high-performance house with an estimated annual energy cost of only $500 to $600 in one of the country's coldest areas.