Md. Code, Labor and Employment § 9–214

An individual who is employed to do maintenance, remodeling, repairs, or similar work is not a covered employee if:

(1) the individual is employed for not more than 30 consecutive work days; and

(2) the work is done:

(i) in or about the private home of the employer; or

(ii) for an employer with no other covered employee, in or about the premises where the employer carries on a business, profession, or trade.