The Robertson Building
The Robertson Building at 215 Spadina was originally home to the James Robertson Company, manufacturers and distributors of plumbing fittings and fixtures. The building was constructed in 1911 to be the heart of the company's operations and included the main showroom for their products. The building's original Douglas fir post and beam construction, brick work, and wood floors are in keeping with the industrial style of the time.
Plaque via Alan L. Brown's site Toronto Plaques. Full page here.