as Concarneau is very touristy you have plenty of options, like hotels, airbnb or vacation homes. You can check out the suggestions from the tourist office in Concarneau:
https://www.deconcarneauapontaven.com/sejourner/hebergement/hebergements-concarneau/
HOTEL LES GRANDS VOYAGEURS**
http://www.hotel-concarneau.com/en/home/
HOTEL LES HALLES***
HOTEL LE PORT**
http://www.hotelduport-concarneau29.com
HOTEL LE LIN
HOTEL LES OCÈANIDES**