The clubs owner Roman Abramovich has appointed consultants to assess the possibility of expanding the stadium.
The current capacity is just over 40,000.
In statement issued on 15 June, Chelsea FC said: "A year ago a study of the area from Fulham Broadway to Stamford Bridge and beyond was commissioned by Chelsea Football Club owner Roman Abramovich to examine the potential of upgrading the streetscape.
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"The study also began to assess the feasibility of an expansion of the stadium capacity within the existing historical site boundary, based on the principles of improving site access, benefiting the neighbourhood and enhancing the spectator experience.
"Mr Abramovich has appointed a professional team to assess, in more detail, the feasibility of expanding the existing stadium capacity at Stamford Bridge Grounds."
The club added the process will now enter a further local consultation process.
It said technical solutions for stadium capacity expansion are 'being investigated initially'.
"This stage of the consultation will focus at present on discussing the rationale and technical solutions for expansion with residents and match-going spectators."
(LM/CD)
