Work will take place over the course of the next two winters and the renovated media facility will be unveiled in time for the 2017 season when Lord's will host the ICC Women's Cricket World Cup final.
The Stirling prize-winning building will receive its first makeover since its opening in 1999, with a lot of changes set to take place following extensive consultation between MCC, the England and Wales Cricket Board, broadcasters and the Cricket Writers' Club.
The Writers' Area will be increased in size from 120 to 144 spaces, while facilities for photographers will also be upgraded, with an additional five spaces (30 in total) available in an expanded area on the mezzanine level of the building.
The existing bar will be relocated to a larger facility serving the dining area, which will in turn provide more usable dining space in which to accommodate the higher demand from the increased number of users.
The outside of the building will be unchanged and, subject to planning approval, the gantry beneath the shell will be extended in width and brought forward to improve the vertical line of sight for television cameras.
"The J P Morgan Media Centre is an iconic building in world cricket, and was ground-breaking when MCC commissioned it, but in a rapidly changing media landscape, a significant refurbishment is required to ensure the Club can meet and exceed the demands placed on it from cricket broadcasters and writers. A 4 million pounds investment will ensure the J.P. Morgan Media Centre will be fit for purpose for many years to come," MCC Chief Executive & Secretary Derek Brewer said.