Five new industrial buildings totaling 501,270 square feet are now in the market in El Monte, giving the San Gabriel Valley city its first new industrial sites in about eight years.

Developer Magellan Group sold three of the just-completed properties and is marketing the remaining pair to both buyers and sellers, said co-founder Kevin Staley.

“There hadn’t been any large-scale development in this market for many, many years,” he said.

The San Gabriel Valley vacancy rate plummeted to 0.7 percent in the third quarter, according to Jones Lang LaSalle.

Staley said the site was once occupied by manufacturing companies including a fire hydrant maker and boiler maker, but a previous owner had cleared the land.

When designing the buildings, Staley planned to target medium-size companies and Chinese buyers, and even incorporated feng shui design principles.

Cushman & Wakefield’s Erik Larson, Robin Dodson, John Minervini and Chris Tolles is representing Magellan in sales and leasing.