Messes cleaned, maintenance conducted, problems fixed.
An explorer gone missing. A king in panic. A treasure to find.
Welcome to the Craggy Peaks. We hope you don't freeze to death.
That would mean we couldn't... play.
Some people call him Dr. Hammer. Some call him Mr. Hammer. Those with a flair for the melodramatic call him “The Hammer”. Others simply call him Hammer, much the way people call Madonna or Sting a single name. He is the one you contact should you have a "unique building" need.
A casual remark by one of the party about something met on a previous adventure leads to a summons to and grilling by the Mages' Guild (or equivalent), probably resulting in an expedition back to that area to recover the things for 'study' by the Guild. The party's presence will be 'requested' for this expedition.