The restaurant bosses said in a social media post that takings were down £60,000 compared to the previous year as a result of the disruption, which has included work barriers blocking the building’s disabled access, missed completion dates and dust and dirt.
Sapore’s basement kitchen was left flooded last week after a workmanship fault on paving outside, according to the Local Democracy Reporting Service.
They said their business rates bill had also doubled.
“After nearly a year of being boxed in, we have reached our breaking point,” they wrote.
“We are a local business trying to survive but these conditions are making it impossible.”
Lino told the BBC he and Antonio had not taken a wage from Sapore in recent months.
“There’s just no consideration for my business,” he said.
“I get people through the door and I have to be smiley, always happy. I can’t give them the stress I’m going through, it’s not easy for me and I take that stress home.
“This is my life.”
