Our team uses data to enhance listings, verify its accuracy, provide buyers with more information upfront and assist sellers and agents market a property more accurately.

We think it's a pretty sage move. 

Realty Sage is formerly VivaGreenHomes.com

Our Story


When founder, Kari Klaus, completed a home renovation she realized that the extra features, which created a healthier, more sustainable, cost saving and comfortable home, may never be seen by future buyers when it came time to sell the home. And, the investment in these extra upgrades may never be returned in full. That's because her home would end up appearing very much like all the rest of the properties on national real estate listing sites, which rarely market accurately or comprehensively the full details of properties and their potential benefits.

But Kari's home is not the only one. Millions of homes are sold each year with features that improve livability, have decreased monthly ownership costs and are of superior quality to traditionally built homes.

Technology improves the way we live, work and play. And technology is a large part of our homes too; how they are built, how they function and how they impact our lifestyle quality. Lower ownership costs also mean that buyers may be able to apply the savings elsewhere. Buyers should have the same access to information to make better choices like they have in the rest of their lives.

As homeowners consider renovations and upgrades, knowing how certain features retain their market value is an important part of the decision-making process. Homeowners can make more informed choices knowing the potential return on their investment such as solar, natural materials and high efficiency heating and cooling systems.

Information about market value and trends play a large role in the industry including the many hundreds of products and services that go into a property and the nearly 6 million real estate transactions each year.

Purchasing a property or improving an existing property can be one of the largest investments a person may ever make. Realty Sage is working to provide that missing gap of information so that consumers know more about how a property can improve their lifestyle for years to come and get more return on their investment when it comes time to sell.

We are improving the real estate industry by using data and innovative products for owners, buyers and industry leaders.

We are Realty Sage. Contact Us to learn more.


  • Washington Post
  • Huffington Post
  • Chicago Tribune
  • Arlnow.com
  • Green Connections Radio
  • Silicon Valley Start Up Radio

Awards & Recognition

  • Build Award for the Best Eco Homes Provider, Virginia 2018
  • National Business Award Recipient, Cleantech Open
  • Southeast Regional Winner,Cleantech Open
  • Friend Level Sponsor, US Department of Energy Solar Decathlon
  • Read more about our awards


Kari Klaus,
Jan Northenscold,
Listing Specialist
Scott Miles,
Lead Developer
Alex Gonzalez,


Alicia Brown,
Real Estate Advisor
Paul Goggin,
Entrepreneur Advisor