Lidl is set to start construction of a €2-million store in Castlerea later this month.
The German supermarket giant already has a store at the Williamstown Road in the west Roscommon town.
Last year, it was given planning permission to demolish it and replace it with a two-storey store, measuring more than 2,600 square metres.
This week, it has lodged a planning application for slight amendments to the proposal, with the gross floor space being reduced by 300 square metres.
But Lidl says it intends to start construction later this month as it already has a grant of planning.
During building works, the existing store will be reduced in size and will continue to trade until the newly constructed store opens, before being demolished.
Local resident Seamus O’Brien is welcoming the news.
The website CIS Ireland estimates the similar two-storey store planned for Carrick-on-Shannon would cost €2.1 million.