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Green Building

Energy Efficiency

At Tim O’Brien Homes we take pride in building homes that are energy efficient and allow us to save our customers significant money on their home over time. We use building science to collect data on homes which allows us to continually improve our construction techniques. By participating in the following programs we are able to make sure every one of the homes we build meets high energy standards.

How Green Energy Can Pay You Back

Typical 30 Year Old Home Built to 1989 Requirements

Average Annual Energy Costs


Tim O’Brien Energy-Efficient Home

Average Annual Energy Costs


Maximum Payback Potential



The Home Energy Rating Score (HERS) is a national index that shows where a home lands on an energy scale. The lower the score, the more energy-efficient the home and the more money the homeowners will save. . If a new home was built to new code specifications it would receive a score of 100 and existing older homes typically score 150 and higher. Every Tim O'Brien Home is tested and we have an average score of 48.

Hers Score

Wisconsin Focus on Energy

Every home in the Focus on Energy New Homes Program undergoes a series of performance tests and must meet specific program standards, including:

  • Framing and insulation installation review
  • Air-tightness to minimize drafts and create superior indoor air quality
  • Sealed combustion equipment and carbon monoxide detectors to ensure safety
  • Whole-house ventilation installed for proper ventilation

Upon certification, Tim O'Brien Homes homeowners receive a Homeowner's manual, a certification report that shows the home's energy savings, and a Focus on Energy New Homes Certification Plaque.

Proud to have our own, Don Esposito featured in the New Home Certification video. (Video courtesy of Wisconsin Focus On Energy®)


Tim O'Brien Homes is in the top one percent of builders in the country meeting the extraordinary levels of excellence in energy and performance specified in the national program requirements.

Green Builder

Energy StarEnergy Icon

This government-backed national program helps businesses and individuals protect the environment through superior energy efficiency. All Tim O'Brien Homes feature Energy Star products.

National Green Building Standard Certification

The NGBS Green certification demonstrates high-performance building in six areas: Lot Design and Development, Resource Efficiency, Water Efficiency, Energy Efficiency, Indoor Environmental Quality, and Building Operation & Maintenance.

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