The Marshall Tavern is once again for sale: owners Daniel Altman and Avi Atid put it on the market within the last week, at a price of $550,000. That’s not much more than they bought it for in 2004, when they paid $512,000 for the property, which they planned to renovate and turn into a five-unit bed and breakfast. Mr. Altman, an architect on the cusp of his 80th birthday, said this week that he is retiring from architecture to paint full-time. His co-owner, he added, wants to focus on his flooring business. “I love to do this, but it requires all my attention and I’m at the age of retirement,” said Mr. Altman, an Israeli-born Berkeley resident who hired Jazz Real Estate to manage the sale. Securing a coastal permit for the renovation project proved an arduous process for the owners. They managed to secure one in 2012, although the California Coastal Commission stipulated that the owners need to build a public pier. The property has been on and off the market in years past; last summer, a sale of the property was listed as pending, although it never went through. Late last year, the coastal commission approved an extension for the permit, which now expires at the end of 2016, and earlier this year the co-owners put out a call for investors to help them fund the project. Now the restoration of the derelict building, which has stood empty since it closed in the early ’80s, will be up to someone else. “The next person will have to do the actual building. We did the legwork,” Mr. Altman said. Though they haven’t been successful in the past at finding a new owner, he said they showed it to a potential buyer on Sunday and that their agent has been fielding many inquiries.