First Pro Shopping Centres says the Wal-Mat in London's north end will be expanding by a third.
The retailer says it is responding to consumer demand for a mix of groceries and general merchandise at a location that has been profitable ever since it was built 11 years ago.
The Wal-Mart Supercentres that have been created in the States have had a devastating impact on some supermarkets and some Londoners are concerned that the same thing will happen here.
The 13 million dollar expansion which will be completed by the end of next year will mean an addition of 60 employees to the 200 currently working in the store.