Va. Code 15.2-2240 requires every Virginia locality to adopt a subdivision ordinance, but zoning is a choice: Va. Code 15.2-2280 says a locality may classify its territory into districts.
So commercial ground may sit in a zoning district or in none, and what unzoned commercial ground still answers to is laid out separately; the county or town planning office can confirm how a given parcel is classified.
The second record is federal: EPA points All Appropriate Inquiries at commercial and government entities, and individuals buying for non-residential use, who may later seek protection from CERCLA liability. That environmental inquiry is the purchaser's step, worked out with an environmental professional and the lender.
Va. Code 54.1-2130 sets the default for a buyer who has signed with no one: unless a licensee enters a brokerage relationship with a person, "it shall be presumed that such person is a customer of the licensee rather than a client", someone for whom the licensee performs routine ministerial acts involving no discretion or judgment. A seller's licensee may show that buyer property under the seller's agreement alone (Va. Code 54.1-2131), and 18VAC135-20-335 reserves showing property to licensees.
Whether to have a buyer's agent at all is the buyer's choice, and the duties a buyer's own licensee takes on are defined under buyer agency.