Mary-Lou McDonough

REALTOR® | CRS, CBR, CLHMS, SRES, ABR, GREEN Barrett Sotheby's International Realty - Lexington

Barrett Sotheby's International Realty - Lexington

1688 Massachusetts Avenue
Lexington, MA 02420

Email Phone: 781-862-1700

About Mary-Lou

Committed to providing her clients with the finest service and highest level of professional representation, Mary-Lou McDonough‘s dedication and diligence are the hallmark of every real estate transaction. She assists each of her clients, representing both buyers and sellers, in defining and fulfilling their real estate goals. 

She has a well-established, trusted network of resources who are available to assist each client throughout the real estate process, whether you need to prepare your home for the market or find a local lender, you can count on her connections. 

Mary-Lou strives to provide each client with a seamless transaction. Sellers benefit from her award-winning marketing plan, resourcefulness, and immediate accessibility. Buyers are well-served with her unique local knowledge, extensive market insight, and strategic negotiation skills. 


Massachusetts Association of Realtors® (MAR) 

National Association of Realtors® (NAR) 

Greater Boston Association of Realtors® (GBAR) 

Women’s Council of Realtors® (WCR) 

Realtors® Political Action Committee (RPAC) 


Certified Residential Specialist (CRS) 

Certified Buyer Representative (CBR) 

Certified Luxury Home Marketing Specialist (CLHMS) 

Senior Real Estate Specialist (SRES®) 

Accredited Buyer’s Representative (ABR®) 

GREEN, The Sustainable Property Designation 

Civic Involvement: 

Lexington Historical Society 

Lexington Chamber of Commerce 

Mary-Lou also works with FISH (Friendly Independent Sympathetic Help), a program that assists seniors with rides to medical appointments. As a Barrett | Sotheby’s International Realty associate, Mary-Lou is a mentor to new agents at her firm. Follow Mary-Lou on social media.


Mary-Lou's Testimonials