The city of Dallas has issued a citation to a business that has a mural honoring the five officers who died in the July 7, 2016, police ambush. The city says the problem isn't the mural, it's the fence blocking visibility at an intersection.

Diana Paz, the owner of Last Call Lounge in north Oak Cliff, didn’t have a permit to use metal siding to build the 8-foot fence the mural was painted on, according to a violation notice issued May 25. The notice also addressed the visibility problems.

"The building inspector went out and looked at it and gave them a notice," city spokesman Richard Hill told Fox News. "They went back and the owners still didn't have a permit, so they gave them a warning. The city did its job."

Paz's cousin Cesar Rodriguez installed the siding on the iron fence at 305 Centre St. when work on the mural began a month ago.

“I’m frustrated because we tried to do something for the Police Department. We tried to make the neighborhood look a little bit better,” Rodriguez said. “We feel a little bit sad that we’re doing all this for our city, and they don’t see or appreciate that."

1 / 4The fence around Last Call Lounge as it was in August 2016. (Google Maps) 2 / 4In this Wednesday, July 12, 2017, photo, a man and his pet dog bicycle past a mural painted on a fence in Dallas. The owner of the establishment Diana Paz and cousin Cesar Paz, who manages the establishment, say the mural pays tribute to the fallen officers of the July 7, 2016, Dallas police shootings at a Black Lives Matter protest and to law enforcement nationwide. Dallas officials are asking that a mural be taken down or altered because it violates city codes. (AP Photo/Tony Gutierrez)(Tony Gutierrez / AP) 3 / 4In this Wednesday, July 12, 2017, photo, Cesar Paz, manager of an establishment owned by his cousin Diana Paz poses for a photo in front of a mural painted on the fence that surrounds the business in Dallas. Cesar Paz and his cousin commissioned a local artist who goes by, Ponchaveli, to paint the mural on the fence paying tribute to the fallen officers of the July 7, 2016, Dallas shootings at a Black Lives Matter protest and to law enforcement nationwide. (AP Photo/Tony Gutierrez)(Tony Gutierrez / AP) 4 / 4A vehicle passes through an intersection past a mural on a private fence Wednesday, July 12, 2017, in Dallas, that the owner says pay tribute to the fallen officers of the July 7, 2016, Dallas police shootings at a Black Lives Matter protest and to law enforcement nationwide. Dallas officials are asking that a mural be taken down or altered because it violates city codes. (AP Photo/Tony Gutierrez)(Tony Gutierrez / AP)

After receiving the violation notice, Rodriguez applied for a permit to build the fence and use metal siding. He moved the fence back three feet to address the complaint over visibility. The additional alterations cost about $2,100, bringing the total cost of the project to about $15,000, he said.

"They still said it wasn't right," Paz told Fox News. "The previous posts are still there, they can see we moved the posts. They say they'll keep giving us citations."

Inspectors have yet to assess whether the alterations meet standards.

"We did not ask that any mural be taken down. This has nothing to do with any mural," Hill told Fox News. "It has to do with the fact that a fence was built without a permit."

The Associated Press contributed to this report.