Maryland state law (Md. Code Ann. [Real Prop.] § 8-208.1 1) prohibits landlords from retaliating against tenants.
It is illegal for a landlord to retaliate against a tenant in Maryland who has exercised a legal right, including:
The kinds of retaliatory acts covered by Maryland law include terminating a tenancy or filing an eviction lawsuit; increasing the rent; or decreasing services, such as locking the laundry room.
For advice on how to respond to—and prove—retaliation, see the article Landlord Retaliation.
For an overview of tenant rights under Maryland landlord-tenant law, and resources for filing complaints, see https://www.oag.state.md.us/Consumer/landlordTenantPDF.pdf.
For state law on landlord retaliation, see Md. Code Ann. [Real Prop.] § 8-208.1 1.
See the Laws and Legal Research section of Nolo for advice on finding and reading statutes and court decisions.
Also, check your local housing ordinances, particularly if you are covered by rent control, for any city or county rules that protect tenants from landlord retaliation. To find yours, call your mayor or city manager’s office or check your city or county website.