The company purchased the building, dubbed "The Emerald Corner," at 8045 Second Ave., according to a news release.

The move allows for the consolidation of its Midtown office space in the Boulevard West Building, as well as warehouse space and parking previously leased from nonprofit Focus: Hope, moving the company's metro Detroit team into one location, CEO Carla Walker-Miller said in a statement emailed to Crain's.

"Establishing our permanent home in this community means so much to the entire Walker-Miller Energy Services team," Walker-Miller said in a release. "This is a continuation of our long-standing commitment to Detroit. We feel extremely blessed to be able to grow our team, and the community, right here."

The minority- and woman-owned company performs home energy assessments to identify energy saving opportunities and installs products such as LED light bulbs, low-flow sink and shower aerators, and insulating pipe wrap, the company's website says.

Walker-Miller's major energy-efficiency contracts are with Detroit-based DTE Energy Co., and Ameren Illinois and Leidos of Illinois, Walker-Miller said.

The 31,000-square-foot building has eight electric vehicle charging stations to accommodate the company's fleet of Chevy Bolt vehicles, which are used by energy specialists and its Energy Efficiency Outreach team, according to Walker-Miller.

The parking lot has capacity for 48 spaces and the company also purchased a surface lot directly southeast of the building with 28 spaces, Walker-Miller said.

The company plans to renovate the property into a Verified Zero Net Energy commercial building, which would mean the energy used by the building would be less than the amount created through technologies and renewable power generation.

Emerald Corner LLC, an affiliate of the company, purchased the building for $1.9 million in October from Pan-African Orthodox Christian Church Inc., according to CoStar Group Inc., a Washington, D.C.-based real estate information service.

The church leases an office in the building and Walker-Miller Energy occupies about 60 percent of the building, Walker-Miller said. The company performed a basic $500,000 renovation to prepare the space, she added.

Detroit-based Onyx Enterprise Inc. was the general contractor on the project. Saundra Little of Detroit-based Centric Design Studio LLC, which recently joined with Quinn Evans Architects, was the architect.

Walker-Miller Energy Services, which also has locations in Okemos and Grand Rapids, generated $28 million in revenue last year, Walker-Miller told Crain's. For 2019, she estimates that will hit $30 million.