MCC officials want to improve changing facilities for players and officials, redecorate the central Long Room through which all players pass on their way to the field, and construct a new roof terrace.
However, plans to renovate the historic London landmark in time for the 2005 English season will have to be approved by the club's 18,000 members at next month's annual general meeting.
If approved, the project will begin in September 2004 and last until April 2005; the pavilion would be completely closed throughout this period.
MCC spokesman Iain Wilton said: "That's why we are not hosting any matches when the ICC Champions Trophy tournament takes place in England in September because it would put us too far behind our building schedule.
"We would want the work, if approved by the members, to be completed in time for the start of the next English cricket season."