One type of renovation at Madison Square Garden will begin this summer when the Knicks try to sign players like LeBron James, Dwyane Wade, Chris Bosh.

Another type, one that will modernize the 42-year-old arena, will move into high gear next year with the first of three summer shutdowns. Each year, construction will start with the end of the Knicks’ season, or the Rangers’, whichever comes later.

Turner Construction is renovating the arena and needs about 20 consecutive weeks from the end of play

So the home of the 1976, 1980 and 1992 Democratic Conventions, and the 2004 Republican Convention, will look brand new by the time 2016 site selection is taking place four years from now. Just saying.