PHOENIX -- Some may not realize it, but the new scale house at the 7th Avenue landfill used to be a portable toilet.

The giant portable restroom was spared a landfill death sentence and turned into a functioning scale house at the transfer station.

• Images: Toilets Become Office In Recycling Effort

"This is a prime castle compared to what we were working in," said Greg Johnson, the landfill's site manager.

Waste Management of Arizona said it removed the toilets in a "Crowd Pleaser" set of Port-O-Lets, put in a desk, cleaned up the walls, installed new tile and added a window.

The company put in concrete blocks for the foundation.

"What would have been a giant, space-hogging landfill eyesore is now a fully functioning scale house that's twice as big as the previous one," the company said in a statement.

Some may wonder about the scent of the building, but Johnson said there isn't one.

"There's no smell," he said. "There's no tanks. It's all sealed; it's completely cleaned."

In fact, employees said nobody would know what the house used to be except for the "Men" and "Women" labels over the doors.

The company said the renovation was a huge success, and a great example of how thinking outside the box can help the environment.

"We preach in our business -- re-use," said Don Cassano of WMA. "Well, this is the ultimate re-use."