It is understood the chain is offering incentives of £20,000 to people who find a new site in their target areas.
Among the target areas is Swindon North, Swindon South, Chippenham and Melksham.
A spokesman for the company said: "We have bold ambitions to have over 1,000 stores in the UK and Ireland by 2020.
"We are looking to build over 50 new stores a year."
Full south west list:
A303 - Ilminster/ South Petherton
A38 - Buckfastleigh
Plymouth Drake Circus