Koman Group is in the early stage of planning an approximately four-story building on what is now a parking lot west of Busch Stadium in downtown St. Louis.

Jason Braidwood, Koman’s president, said Wednesday the project — called Cupples 10 — is intended to promote job growth, not merely to shift jobs from elsewhere.

The Post-Dispatch had reported the project on Tuesday, but the developer hadn’t been identified in city documents.

Cupples 10, which would have about 100,000 square feet of space, is planned for the parking lot just south of the Westin Hotel and adjacent to the Stadium MetroLink station. Braidwood said Koman controls the site, which he said is partly owned by a joint venture of McCormack Baron Salazar and SunAmerica.

The site plan included in documents submitted to the Board of Aldermen shows the Cupples 10 building set back from Spruce Street. Braidwood said the development plan includes a plaza between Cupples 10 and the Westin. Forum Studio is designing Cupples 10 for energy efficiency, said Braidwood, adding that plans include rooftop solar panels.

No tenants have signed on, but Braidwood said Koman is looking for companies such as those that have opened offices at the Cortex tech district in the Central West End.