Mainely Wraps will close its Old Port location at 339 Fore St. on Nov. 30.

Rich and Naphtali Maynard, owners of the quick-service sandwich shop, said they have decided not to renew their Old Port lease primarily because the flow of the space does not fit the restaurant’s business model as well as they would like it to. They also cited increasing lease rates in the Old Port. Taken together, according to Naphtali Maynard, “we felt we had little choice.”

The Old Port Mainely Wraps – there is a second location at 360 U.S. Route 1 in Scarborough – is located in a building with two floors. Customers order and sit on the ground floor, but the kitchen is in the basement, which means the staff is constantly running up and down 14 stairs all day, Maynard said. The unusual layout required extra staffing, she said.

The Maynards will be looking for a new space in Portland, but if they don’t find anything by December they will continue serving their Portland catering customers through the Scarborough store.