NORWALK - Several closed storefronts in the SoNo district of Norwalk are stirring up concern among local business owners. 

Business owners say strict parking regulations downtown and competition from other nearby towns with recently redeveloped districts are two of the main concerns.

Despite those issues, they say they're hopeful new commercial and residential construction in SoNo will signal a rebirth. 

"We're looking forward to that. We think things are on an upswing. We're optimistic about it. But it has been difficult times the past couple of years, no doubt about it," says Richie Ball, owner of Donovan's Restaurant. 

City officials say there is concern with regard to the vacancies downtown. They say that some of the closures had to do with the market and customer interest in the closed establishments.