Not much in 5e. Maybe cr 3 for the whole thing. A party of lvl 1 could do it assuming they don't roll bad on saving throws for the traps. The wasp and glass part seems most dangeous. If party is likely to just bum rush it, maybe cr4 and a party of level 2

Honestly, it's CR1. The guy has 18hp meaning you probably murk him in a round at any level. The most dangerous thing is the pit trap.