• Making Buildings Better
    Expert Guidance in Green Certification

 In 1950’s America, cigarette smoking was the epitome of cool and glamour. Hollywood icons such... Read more

See a Map of Our Work


  • green|spaces has had the pleasure of working with Abe for years now. His knowledge and expertise has benefitted us; from green building program development and training curriculum to HERS ratings and building science proficiency.

  • In their roles as the primary contributors to the LEED v4 Reference Guide for Homes Design and Construction, Abe and Carl were critical in making this document the incredibly valuable tool that it is.

  • Thank you again for all the work you did to help make our new home more energy efficient and comfortable to live in. I would recommend that anyone building a home discuss with you the advantages of using green building techniques.

  • Carl and Abe at SK Collaborative are straight shooters who know what they are doing and do it well. I have intentionally gone out of state to hire SK Collaborative because of their vast experience and passion for sustainable development.

  • I wish we had two full days with Carl because it was very obvious that his knowledge, experience and thought processes would be highly beneficial to our organization. He covered an amazing amount of knowledge in a very short time.

  • Carl is on the bleeding edge of the sustainable construction movement, and one of the few proponents who understands the special challenges faced by green remodelers.

  • Carl helped us create and design our dream EarthCraft home. We were drawn to Carl based on our research. His accolades in the "green building" community are extensive, and we knew he was the man for the job.

Case Study

  • D92 Korean BBQ brings the authentic flavor of Buford Highway restaurants to downtown Decatur. This interior finish project in a new apartment building was certified 3 Globes under the Green Globes Sustainable Interiors program, meeting the requirements of the City of Decatur High Performance Building Ordinance.
  • The City of Decatur, Georgia is developing a plot of land in to a six home cottage court development.  The homes will be modest in size and sold to individuals and families earning 100% or less than the Area Mean Income.  Designed to fit the new cottage court zoning and to comply with the city sustainable buiding ordinance, these homes will feature high performance and healthy construction, not-so-big house design principles, and shared common space.

  • Formerly known as Solis Downwood, Bell Buckhead West is a 280 unit luxury apartment development in northwest Atlanta, close to I-75 and Buckhead.

  • Ewa Village

    The Villages of Moa`e Ku III is an affordable housing development in Ewa Villages on the island of Oahu, Hawaii. It is the last of three planned phases where apartment homes for families are arranged in four clusters, each centralized around a common green and tot lot area, providing an intimate sense of community. The project is certified under the National Green Building Standard, qualifying for Federal Low Income Housing Tax Credits. 

  • 309 Vine Cincinnati OH National Green Building Standard

    This historic 11-story historic office building in downtown Cincinnati was converted into a mixed-use property with luxury apartments, restaurants, office and retail. It includes 294 luxury apartments, 45,000 square feet of street-level retail, restaurant and office space, including an 11,000-square-foot market.  This project was certified under the National Green Building Standard Multifamily Renovation program.