IS WALMART BUILDING A STORE IN PHELAN,CA.

There is no Wal-Mart in Phelan, maybe in the next 5 to 10 year's but the closest Wal-Mart to Phelan is the one on Main in Hesperia is on the eastside of I-15 on main.

There's no Walmart in phelan my aunt lives there and has to drive to the Walmart in hesperia

Not sure, but there is one in Hesperia, and Victorville