not 2004-05 (best defensive English side ever) or 2009-10 (absolute beast of a domestic treble team under King Carlo)
2009-10: We broke several Premier League records and statistics including most goals scored in a season (103), most goals scored at home in a season (68) and best goal difference in a season (+71). Chelsea became the first top-flight team to reach a century of league goals since Tottenham Hotspur in 1962/63. The team only failed to score in two of 53 games, a club record. Also, the team holds the Premier League record for most goals scored at home in a season.