Welcome Home
- homes
Marie Costello
Sales Associate
- Direct: (410) 271-6551
- Office: (410) 266-0600
About
I am committed to guiding my clients through the buying and selling process with care, clarity, and respect. I believe trust is built through clear communication, consistency, and integrity, and I take pride in serving as a thoughtful, steady advisor from start to finish. I understand that real estate decisions often coincide with meaningful life changes, which is why my goal is to make each step feel manageable, supported, and never rushed. My background as a paralegal has strongly influenced the way I work—organized, detail-oriented, and thoughtful in every aspect of the process. Most importantly, it taught me the value of listening carefully and advocating for the people I serve. Whether you’re beginning to think about selling, searching for your next place to call home, or simply exploring your options, I’m always happy to help in whatever way feels most comfortable for you. I approach every client relationship with honesty, patience, and a genuine desire to understand your goals.
Sell Smarter
Sell your home smarter with more data and insight with our free home value report.
Get Your Free Home Value Report
Estimate
Get the most accurate estimate, powered by the same technology used by lenders.
Compare
See what other homes are being sold for in and around your neighborhood.
Estimate
Get the most accurate estimate, powered by the same technology used by lenders.
Compare
See what other homes are being sold for in and around your neighborhood.
© 2026 BHH Affiliates, LLC.
An independently owned and operated franchisee of BHH Affiliates, LLC. Berkshire Hathaway HomeServices and the Berkshire Hathaway HomeServices symbol are registered service marks of Columbia Insurance Company, a Berkshire Hathaway affiliate.
IMPORTANT NOTICE: Never trust wiring instructions sent via email. Cyber criminals are hacking email accounts and sending emails with fake wiring instructions. These emails are convincing and sophisticated. Always independently confirm wiring instructions in person or via a telephone call to a trusted and verified phone number. Never wire money without double-checking that the wiring instructions are correct.
Equal Housing Opportunity
Berkshire Hathaway HomeServices PenFed Realty, 1997 Annapolis Exchange Pkwy. Ste. 101, Annapolis, MD, 21401, (866) 225-5778, [email protected]