Google that name, and you get
Premium Properties - Rentals and Property Management in Walnut ...
Premium Properties serves the Walnut Creek area with rental housing and professional property management.
1200 Mt Diablo Blvd Walnut Creek, CA 94596
Give them a call and see if this is their listing
Is this property showing up for rent somewhere? If you found it online, was there a number or contact information provided?
If not....your best bet is to contact a rental agent from a property management company to
1) determine if indeed it is legitimately offered for rent by the owner
2) and if not, the rental agent can assist you to find a suitable rental for yourself
3) and you minimize the possibility of being scammed
Simply google property management in Pleasant Hill, and speak to at least two agencies.
Good luck to you