 Chelsea hold the English record for the highest ever points total for a league season ( 95 ) , the fewest goals conceded during a league season ( 15 ) , the highest number of Premier League victories in a season ( 29 ) , the highest number of clean sheets overall in a Premier League season ( 25 ) ( all set during the 2004 – 05 season ) , and the most consecutive clean sheets from the start of a league season ( 6 , set during the 2005 – 06 season ) . The club 's 21 – 0 aggregate victory over Jeunesse Hautcharage in the UEFA Cup Winners ' Cup in 1971 remains a record in European competition . Chelsea hold the record for the longest streak of unbeaten matches at home in the English top @-@ flight , which lasted 86 matches from 20 March 2004 to 26 October 2008 . They secured the record on 12 August 2007 , beating the previous record of 63 matches unbeaten set by Liverpool between 1978 and 1980 . Chelsea 's streak of eleven consecutive away league wins , set between 5 April 2008 and 6 December 2008 , is also a record for the English top flight . Their £ 50 million purchase of Fernando Torres from Liverpool in January 2011 was the record transfer fee paid by a British club until Ángel di María signed for Manchester United in August 2014 for £ 59 @.@ 7 million . 
