Mary Ellen Greenberg

Mary Ellen Greenberg
Real Estate Agent (Salesperson)
Dennis MA

Salesperson (MA: 134070)

17 years experience

REALTOR® 1 Active Listings Serves Barnstable County, MA
View on Realtor.com

Contact Information

Brokerage
Gibson Sotheby's International Realty

Office Website
Office Address
563 Rte 6a
Dennis, MA  02638
(Barnstable County)
Office Phone
508-385-4944
Office Fax
Mobile
508-385-4944
Email
mgreenberg@gibsonsir.com

Service Areas

Dennis: MA East Dennis: MA Barnstable Town: MA Yarmouth: MA Yarmouth Port: MA South Dennis: MA Dennis Port: MA West Dennis: MA Harwich Center: MA Harwich: MA South Harwich: MA Northwest Harwich: MA East Harwich: MA Harwich Port: MA Brewster: MA South Yarmouth: MA Cummaquid: MA Barnstable: MA Centerville: MA Chatham: MA West Chatham: MA Cotuit: MA East Orleans: MA Eastham: MA North Eastham: MA Hyannis Port: MA Hyannis: MA North Chatham: MA South Orleans: MA Orleans: MA Sandwich: MA East Sandwich: MA Forestdale: MA South Chatham: MA Wellfleet: MA South Wellfleet: MA Truro: MA West Barnstable: MA West Harwich: MA West Yarmouth: MA North Truro: MA Osterville: MA

About Mary Greenberg

Mary Ellen, a Boston native, has spent much of her life on Cape Cod, particularly in Dennis near Nobscusset Beach. Her deep-rooted affection for the Cape is evident in both her personal and professional endeavors. A graduate of the University of Massachusetts Amherst with a degree in marketing, Mary Ellen has been a licensed Realtor since 1997, gaining extensive experience across diverse markets including Cape Cod, Boston, Atlanta, and Honolulu.

With over two decades in the real estate industry, Mary Ellen brings a wealth of knowledge and expertise to her clients. Her client-focused approach recognizes that buying or selling a home can be overwhelming, and she prioritizes understanding her clients’ unique needs to ensure a smooth process that meets and exceeds their expectations. Whether clients are seeking a beach house, an investment property, or a permanent residence, Mary Ellen is dedicated to finding the perfect fit, taking into account their lifestyle and preferences.

For those considering selling their property, Mary Ellen offers tailored strategies to maximize returns, leveraging the comprehensive marketing resources available through Gibson Sotheby’s International Realty. Her proficiency in staging homes enhances buyer interest, and she collaborates with a designer to create inviting spaces that resonate with potential buyers.

Mary Ellen is committed to delivering exceptional customer service, a quality reflected in her warm and engaging personality. Throughout her career, she has successfully assembled land parcels for development, represented builders in various construction projects, and facilitated the sale of over 200 private residences. These experiences collectively enhance the value she provides to her clients.

Outside of real estate, Mary Ellen has a keen interest in Feng Shui, architecture, and design. She actively volunteers at the Cape Cod Museum of Art and enjoys practicing yoga, swimming, walking, and capturing the beauty of the Cape through photography.

Barnstable County, MA Real Estate Market Analysis (Single Family Homes)

$1,629,349
Avg. Listing Price
From Mary's portfolio
3.4 / 2.9
Avg. Beds/Baths
Typical property size
2,364 sf
Avg. Square Footage
Interior living space
1296
Active Listings
Current inventory

If you need to reach working real estate agents in Barnstable County, Massachusetts, this list was built for you. Mortgage lenders prospecting for referral partners, title companies expanding their closing networks, PropTech platforms pitching new tools, insurance providers, continuing education companies, and recruiters all use this data to open doors with the agents who are actively closing deals on Cape Cod right now.

Unlike broad statewide campaigns that waste budget on agents outside your service area, this list puts you in front of the specific professionals you need. Whether you are launching an email sequence, building a phone outreach campaign, or matching contacts on LinkedIn, having clean, county-level agent data is the difference between noise and results.

Why Buy a Barnstable County Real Estate Agent Email List From Dr Bill

Every record in this list is sourced directly from the Massachusetts state real estate licensing board, so you are reaching agents who are verified, active, and licensed — not scraped from outdated directories or aggregated from stale third-party feeds. The list is cleaned monthly, new emails are added weekly, and the entire database is completely refreshed bi-annually. That discipline is why we back every list with a 96% deliverability guarantee, something cheap alternatives simply cannot offer.

Dr Bill has been in the list business since 2005 and has sold over 31,000 lists to marketers, lenders, vendors, and recruiters across every industry that works with real estate professionals. When you buy Barnstable County real estate agent email list data here, you get {{AGENT_COUNT}} actively licensed agents with verified email addresses, plus {{CELL_COUNT}} agents who also have cell phone numbers on file for SMS or direct dial campaigns.

How to Use This Barnstable County Agent List

Email outreach is the most common use case, and this list is formatted to drop directly into cold-email platforms. We specifically recommend Zap Contact at zapcontact.com, which is built for exactly this kind of B2B agent outreach and handles list uploads, sequencing, and deliverability tracking cleanly. You can also use the data for direct mail pieces, ringless voicemail drops, or cold calling campaigns using the included cell phone numbers.

For sharper targeting, the list lets you segment by broker versus sales agent, so a recruiter hunting for experienced producers can filter differently than a CE provider marketing license renewal courses. No other vendor offers this list segmented down to the zip code level within Barnstable County, giving you precision that statewide or even county-wide blasts cannot match.

Why Barnstable County, Massachusetts Agent Data Matters

Barnstable County covers the entire Cape Cod peninsula, including active real estate markets in Barnstable, Hyannis, Falmouth, Sandwich, Dennis, Yarmouth, Brewster, Harwich, Chatham, Orleans, Eastham, Wellfleet, Truro, and Provincetown. Each of these communities has its own agent ecosystem, and targeting them by city or zip code lets you speak directly to the local market rather than broadcasting to agents two counties away.

With {{AGENT_COUNT}} licensed agents in the county, the Barnstable market is dense enough to support a serious outreach campaign but focused enough that every contact counts. Local targeting here is not just convenient — it is a strategic advantage over vendors pushing statewide blasts that dilute your message and your budget.

Current Property Listings

As of 6/27/2026, Mary Greenberg has 1 property for sale in Dennis and surrounding areas.

$749,000

Listed 2026-06-18

15 Brezner Ln
Barnstable, MA  02632

Beds: 2.0
Baths: 1.5
Sq Ft: 1,004
Lot: 8,712 sf
Single Family Map
View Full Details

Current Property Rentals

Mary Greenberg currently has no rental properties available in Dennis and surrounding areas. Check back later.