Let us help you ...make your home comfortable, affordable, and healthier.

About Greenmark Home Performance

Greenmark Home Performance has been providing thorough, quality home comfort assessments in St. Louis, MO and Metro East Illinois area for years. View our entire service area. We are certified as a Building Performance Institute, Building Analyst, and as an Envelope Professional. This means that we will be able to easily pinpoint areas of energy loss in your structure and provide proven solutions to ensure your comfort in your home.  Some of the main areas we focus on include:

Mark Inman has been providing comprehensive home evaluations for years now and knows precisely where to look in a building to discover where energy is being used, lost, and wasted. We have ideal solutions for all situations. He has teamed up with the Department of Energy (DOE) Energy Star, and local power distributors throughout the region.

Our Mission

Mark's mission is to make homeowners in St. Louis and Metro East comfortable in their homes using the "whole-home" approach, making homes more energy efficient, durable and healthier.


Average rating for Greenmark Home Performance is 5 stars of 5 stars - based on 9 reviews
Replacement Doors in Mascoutah, IL
We had Greenmark Home Performance come out for a door. We were very satisfied with the company and the product. If we had any questions or concerns, Mark was quick to respond and answered them promptly. We really liked the fact when Mark came out, he did exactly what we asked him to do, didn't try ...
Energy Audit in Saint Louis, MO
We were unaware of what was involved in an energy audit and your audior took the time to explain everything. We were impressed with the report which told us the areas in which we need to take action on. He never pressured us to use any particular contractors, he just suggested that we go to the ...