The new column-free main stand will bring stadium capacity to 20,000 in time for the September 2017 season. Fit-out work is then expected to continue throughout that season.
The rebuilt main stand will have UEFA-standard player and media facilities, while there will be new hospitality areas, including a rooftop-style restaurant looking out towards Edinburgh city centre.
There are plans to implement a couple of big screens into the stadium. The new stand does not have a name as yet but the club are looking at the possibility of selling naming rights.
The club hopes to start work on the new stand early next year once the present redevelopment of the Wheatfield Stand Undercroft is complete.
This will provide a temporary clubstore, ticket centre, admin offices and dressing room.