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Martha C O'Sullivan

Martha C O'Sullivan
Real Estate Agent (Associate Broker)
Atlanta GA

Associate Broker (GA: 289813)

21 years experience

REALTOR® 11 Active Listings Serves Dekalb County, GA
View on Realtor.com

Contact Information

Brokerage
Atlanta Communities - Brookhaven/Dunwoody

Office Website
Office Address
4170 Ashford Dunwoody Rd
Atlanta, GA  30319
(Dekalb County)
Office Phone
404-844-4198
Office Fax
404-252-0079
Mobile
404-964-9918
Email
mart******@*****.com
Show Email for $5

Service Areas

Marietta: GA Smyrna: GA Fair Oaks: GA Mableton: GA Austell: GA Lithia Springs: GA Douglasville: GA Tyrone: GA Fayetteville: GA Woolsey: GA Flovilla: GA Peachtree City: GA Druid Hills: GA Atlanta: GA Brookhaven: GA Sandy Springs: GA Vinings: GA

About Martha O'Sullivan

Martha O'Sullivan relocated to Atlanta in 1989 to pursue her education at American University. With over two decades of experience in customer service, she has built a strong foundation with one of the city's largest employers.

Since entering the real estate sector in 2005, Martha has established herself as a leading agent, consistently ranking among the top performers and achieving multi-million dollar production status. She adeptly assists both buyers and sellers, having successfully facilitated transactions across multiple counties, including Cobb, Coweta, Clayton, DeKalb, Dawson, Henry, Fulton, Fayette, Forsyth, Gwinnett, and Newton.

Martha has played a pivotal role in the relocation processes for numerous employees of Delta and Northwest Airlines, showcasing her extensive knowledge of the Atlanta area. Regardless of your location preferences, Martha is dedicated to helping clients discover their ideal homes.

Her commitment to customer satisfaction, combined with a skilled team of fellow agents, ensures that your real estate journey will be seamless and efficient for you and your family.

Martha emphasizes the importance of personalized service in every transaction.

For inquiries, please contact Martha O'Sullivan at 404-964-9918.

**Professional Affiliations:**
- Atlanta Board of REALTORS
- Georgia Association of REALTORS
- National Association of REALTORS
- FMLS
- GAMLS
- REALTOR.com

**Contact Information:**
Website: www.marthao.net
Direct: 404-964-9918
Facsimile: 404-806-4327
Email: martha@sharp-res.com

Dekalb County, GA Real Estate Market Analysis (Single Family Homes)

$468,946
Avg. Listing Price
From Martha's portfolio
3.8 / 2.8
Avg. Beds/Baths
Typical property size
2,823 sf
Avg. Square Footage
Interior living space
2886
Active Listings
Current inventory

Dekalb County's real estate market represents one of Georgia's most dynamic and diverse property landscapes, anchored by its strategic position adjacent to Atlanta and supported by a robust network of 5,213 actively licensed real estate agents. This substantial agent population reflects the county's role as a major economic hub, where residential communities, commercial developments, and mixed-use projects create countless opportunities for property transactions across multiple price points and market segments.

The sophistication of Dekalb County's real estate ecosystem is evident in its comprehensive digital connectivity, with all 5,213 licensed agents maintaining email addresses for modern communication and business development. This level of technological adoption signals a market that embraces innovation while serving everything from first-time homebuyers in emerging neighborhoods to high-net-worth clients seeking luxury properties in established enclaves.

Major Dekalb County, Georgia Real Estate Markets

Decatur stands as the county seat and a premier destination for buyers seeking walkable communities with historic charm, while Dunwoody attracts families and professionals with its excellent schools and upscale residential developments. Stone Mountain offers unique recreational amenities that drive both residential and vacation property interest, and Tucker has emerged as a hotspot for young professionals seeking affordable alternatives to Atlanta proper with convenient transit access.

The cities of Chamblee and Doraville have experienced remarkable transformation, evolving from industrial centers into vibrant mixed-use communities that attract diverse populations and innovative businesses. Meanwhile, areas like Brookhaven and parts of unincorporated Dekalb County command premium prices for their proximity to Atlanta's business districts, creating distinct micro-markets that require specialized local expertise to navigate effectively.

Market Dynamics and Geographic Complexity

Dekalb County's real estate market operates across an unusually wide spectrum of property values and buyer demographics, from affordable starter homes in transitioning neighborhoods to multi-million-dollar estates in gated communities. This diversity creates complex pricing dynamics where adjacent zip codes can vary dramatically in market trends, average days on market, and buyer preferences, requiring deep local knowledge to understand and predict.

The county's position within the Atlanta metropolitan area means its real estate patterns are influenced by corporate relocations, infrastructure developments, and regional economic shifts that ripple through different communities at varying speeds. Properties near MARTA stations command different premiums than those in car-dependent areas, while proximity to major employers like the Centers for Disease Control creates unique demand patterns that savvy agents and investors monitor closely.

Why Businesses Need Dekalb County, Georgia Agent Contact Data

Real estate service companies, mortgage lenders, and property technology firms require direct access to Dekalb County's extensive agent network to effectively penetrate this sophisticated market. With 5,213 agents actively working across diverse communities and price points, businesses can segment their outreach by specialization, geographic focus, or transaction volume to maximize their marketing investment and partnership development efforts.

The complete email coverage across all licensed agents enables businesses to implement targeted digital marketing campaigns, announce new services, or recruit top talent with precision and efficiency. Whether launching innovative property management software, expanding mortgage lending operations, or introducing new real estate marketing tools, having verified contact information for this substantial agent population provides the foundation for successful market entry and growth strategies.

Current Property Listings

As of 2/17/2026, Martha O'Sullivan has 11 properties for sale in Atlanta and surrounding areas. These are the top 10 listings.

$275,000

Listed 2025-11-08

2263 Leicester Way SE
Atlanta, GA  30316

Beds: 3.0
Baths: 2.5
Sq Ft: 1,636
Townhomes Map
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$460,000

Listed 2026-02-03

5045 Ridgemont Walk SE Unit 28
Atlanta, GA  30339

Beds: 4.0
Baths: 3.5
Sq Ft:
Lot: 871 sf
Townhomes Map
View Full Details

$232,000

Listed 2026-02-10

501 Dunbar Dr
Atlanta, GA  30338

Beds: 1.0
Baths: 1.0
Sq Ft: 1,002
Lot: 436 sf
Condos Map
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$675,000

Listed 2026-02-11

123 Beardon Cir SE Unit 8
Atlanta, GA  30316

Beds: 2.0
Baths: 2.5
Sq Ft: 1,470
Condos Map
View Full Details

$3,590,000

Listed 2025-11-23

4402 Blackland Dr
Marietta, GA  30067

Beds: 6.0
Baths: 6.5
Sq Ft: 6,500
Lot: 43,560 sf
Single Family Map
View Full Details

$3,490,000

Listed 2025-11-23

120 Woodlawn Dr NE
Marietta, GA  30067

Beds: 6.0
Baths: 5.5
Sq Ft: 6,500
Lot: 45,825 sf
Single Family Map
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$290,000

Listed 2026-02-06

803 Spring Heights Ln SE
Smyrna, GA  30080

Beds: 2.0
Baths: 2.0
Sq Ft: 1,278
Lot: 1,612 sf
Condos Map
View Full Details

$760,000

Listed 2026-02-16

445 Olmstead Way
Alpharetta, GA  30022

Beds: 3.0
Baths: 3.5
Sq Ft: 2,268
Lot: 1,481 sf
Townhomes Map
View Full Details

$950,000

Listed 2025-11-08

37 Oak Hill Ln NW
Cartersville, GA  30121

Beds: 5.0
Baths: 3.5
Sq Ft: 6,283
Lot: 186,437 sf
Single Family Map
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$1,400,000

Listed 2025-11-21

1620 High Trl
Atlanta, GA  30339

Beds: 6.0
Baths: 5.0
Sq Ft: 6,999
Lot: 16,161 sf
Single Family Map
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Current Property Rentals

As of 2/17/2026, Martha O'Sullivan has the following rental properties available in Atlanta and surrounding areas. These are the top 10 listings.

$4,600

Listed 2026-01-11

4209 Whitby Way SE Unit 16
Smyrna, GA  30080

Beds: 4.0
Baths: 4.0
Sq Ft: 3,756
Lot: 2,178 sf
Townhomes Map
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$4,300

Listed 2026-01-13

2260 Edgartown Ln SE Unit 1
Smyrna, GA  30080

Beds: 4.0
Baths: 3.5
Sq Ft: 3,108
Lot: 2,178 sf
Townhomes Map
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