Also see our informational packet; “ Cowie Law Group, P.C. – Maryland and Washington DC Condo and HOA Law Attorneys Advancing Community Association Interests .”. Condominium and HOA Attorneys Serving Maryland and Washington DC. MD/DC Condo & HOA Facebook Group. MD/DC Condo & HOA Law Website. 410-327-3800 | 202-670-6289 | 301-830-8315.