RocketFuel LLC is preparing to relocate its Downtown office a block south to Belz Investco GP’s 88 Union Ave.

A $73,890 building permit application has been approved by the city-county Office of Construction Code Enforcement for RocketFuel’s tenant remodel.

The website design and Internet marketing firm is currently located in 1,800 square feet at Brinkley Plaza, 80 Monroe Ave., and will move to 4,600 square feet across an entire floor in the office high-rise commonly known as the Memphis Business Journal building because of the neon sign that sits atop it.

Reuben Brunson, CEO of RocketFuel, said he’s in the midst of negotiating the new lease.

“We’re taking on a considerably larger space so we can grow,” Brunson said. “We’re kind of going through the walls in here right now, so it’s a good time. We’ve got some really super plans for that space.”

Belz Construction Services LLC is the contractor for the project. Belz will also provide architectural services for RocketFuel’s new design.

RocketFuel started as a subsidiary of Rocket Science Design in 2007 and now has 12 employees. Brunson said his firm is setting up shop in what’s becoming “the silicon delta.”

“You’ve got Red Deluxe coming in, Lokion is in 88 Union as well,” he said. “It’s pretty exciting for that little area over there.”