A basement can have 10 outlets on a 15 amp breaker and up to 13 outlets on a 20 amp breaker on a single circuit.
There is no distance requirement between outlets which are located in a basement.
The standard basement electrical outlet height is 15”, as per the National Electrical Code – taken from the bottom of the receptacle box to the level of the floor.
You cannot have a barrier below an outlet that extends beyond 25” I.E a counter or shelf.
If for any reason, a basement is left unfinished, then there must be at least one ground fault circuit interrupter (GCFI) on each circuit that has an outlet in your basement.