Hyatt Hotels Corp. is converting all 38 of its extended stay Summerfield Suites hotels, as well as 16 Hotel Sierra properties recently acquired from LodgeWorks, into a single new brand, Hyatt House.

The new brand's key elements include a central social space, apartment-style rooms and customized food and beverage offerings. All 54 properties will convert to the new Hyatt House sign by early next year, Hyatt expects to complete necessary remodeling and service changes to those properties throughout 2012.