A four-year, $11 million effort to build the Day Hill Dome indoor sports bubble in Windsor came right down to the wire, achieving its certificate of occupancy at 2 p.m. Friday.

Connecticut has a number of venues for watching live sporting events like Rentschler Field, the XL Center, Dunkin’ Donuts Park, Dillon Stadium and Gampel Pavilion. Recreational sports facilities — for those who prefer to be part of the action — are playing catch-up.

Vincent DiCarlo shuttered his home-based marketing business three years ago, devoting his time and energy into building a 95,000-square-foot sports dome in a former tobacco field off Day Hill Road in Windsor.