Street view of Mitt and Ann Romney's proposed La Jolla home

This is an architect's rendering of the home Mitt and Ann Romney hope to build on the beachfront in La Jolla. The couple purchased the home that is there now for $12 million in 2008. (Island Architects / October 10, 2013)

Mitt and Ann Romney have kept low profiles since their plan to move into the White House fell through last November.

But recently, they’ve begun to re-emerge on the public stage.

On Monday, Mitt Romney was a guest on Sean Hannity’s Fox News show, slamming President Obama’s handling of the current standoff with Congress. And Ann Romney has been popping up all over as she promotes her best-selling cookbook to raise money for medical research.

On Friday, their private life will again spill into the public square when the California Coastal Commission takes up a challenge to their plans to tear down the La Jolla beachfront home they purchased on Dunemere Drive for $12 million in 2008.

They intend to replace the home, once owned by the founder of Jack in the Box and a mayor of San Diego, with an 11,000-square-foot mansion, including that infamous car elevator. The main floor will have 4,681 square feet, the second floor 1,790, and the subterranean portion 4,591.

The San Diego Planning Commission unanimously approved the project in June, but in July, a former Dunemere Drive neighbor of the Romneys filed an appeal with the California Coastal Commission, which has final say.

Anthony Ciani, an architect who built and owned the home that is kitty-corner to the Romneys' property on Dunemere, said the Romneys wrongly claimed to own the beach in front of their home, thus inflating their lot size from 12,000 to 18,000 square feet in order to build a home that is about 1,000 square feet larger than the city would normally allow.

“If developers and wealthy property owners can hire a surveyor that shows they own the public beach and get a permit to capitalize on that land to build a bigger house than you normally would, it’s going to become, ‘Oh, Mitt Romney did it,’” said Ciani. “It becomes a precedent. It’s not just La Jolla. It’s all of California’s beaches that have private property next to them.”

Ciani, who is known in La Jolla for his commitment to preserving beach access, also said the Romneys have privatized a public walkway along the north side of their home that runs from the street to the beach. Years ago, as a paperboy and lifeguard, Ciani said, he freely used the concrete steps.

In a nearly 300-page report, the Coastal Commission’s San Diego staff rebuffed Ciani’s objections and has recommended that the commission approve the project when it meets Friday in Mission Valley.

The Romneys have not explicitly addressed Ciani’s accusations.

In June, Ann Romney made a surprise appearance before the San Diego City Council to complain about a delay in the project related to a problem with the city’s public notice process.  And earlier this month, she told a San Diego TV station while promoting her cookbook that “Everything is fine…It’s always frustrating to get a building permit on the ocean. But it’s good.”

"Obviously, they are disappointed," said their San Diego attorney, Matthew Peterson, who has tangled previously with Ciani over other projects. "They want to have a house where they can have their kids and grandkids. They could have built a place 1,500 square feet bigger -- all the way out to the seawall, but they wanted to be sensitive to the neighborhood."

Petersen dismissed Ciani’s complaints, and Ciani, in harsh terms.

“He’s well-known in La Jolla for being an obstructionist who causes issues,” said Peterson. “He’s misinformed and he’s obviously got other motivations, but who knows what?”

“That is almost laughable,” said Ciani, who moved to Pacific Grove near Carmel last year after selling his Dunemere home for $3.5 million. (Some Romney supporters wondered why he has returned to fight a project in a neighborhood he no longer calls home, but Ciani said he and his wife own a historic cottage less than a mile away, in La Jolla Village.)

Peterson said the Romneys not only own the sand in front of their home up to the mean high tide line, but have agreed, as the Coastal Commission requires, to dedicate the approximately 6,000 square feet of beach to the public in exchange for their building permit.

“It’s a public beach,” said Peterson. “The public will use the space in perpetuity.’

As for the walkway that Ciani used as a boy, said Peterson, the Romneys and their next-door neighbor to the north own the short passageway. Though previous owners allowed the public to use it, it has been locked for decades. Also, he said, there are multiple other beach access points nearby.

Just as they were divided about Romney and his political prospects last year, neighbors are divided over the project.