Find the Perfect Marietta Office Space to Grow Your Business

Marietta Office Space for Lease

Market Overview & Key Market Indicators

Marietta is the county seat of Cobb County and sits at the geographic center of the Northwest Atlanta office market. Positioned along the I-75 corridor between the established Cumberland/Galleria business district and the more affordable Kennesaw submarket, Marietta offers a middle-ground option that combines reasonable lease rates, diverse building inventory, and strong access to the broader metro area. The city's historic downtown square, growing medical corridor, and proximity to Dobbins Air Reserve Base and Lockheed Martin's aeronautics facility create a diversified tenant base that insulates the market from sector-specific downturns.

Supply of Office Space

The Marietta-Kennesaw submarket contains a combined office inventory spanning several million square feet across a wide range of product types. Marietta's supply includes Class A mid-rise office buildings, single-story flex-office product, medical office buildings, and smaller professional office condominiums.

The highest concentration of Class A office product sits along the Franklin Gateway corridor and the South Marietta Parkway area, where multi-story buildings serve professional services, legal, and financial tenants. Medical office inventory is concentrated along the Hospital Authority corridor near WellStar Kennestone Hospital, one of the largest hospitals in Georgia. The Whitlock Avenue and Roswell Street corridors feature smaller professional office buildings ideal for law firms, accounting practices, and insurance agencies. Single-story flex-office product is prevalent along the Cobb Parkway (US-41) corridor.

Cost to Lease Office Space

Office lease rates in Marietta range broadly depending on product type and location. Within the broader Marietta-Kennesaw submarket, average asking rents sit at approximately $33 per square foot, though this figure is skewed by Class A product. Class A space averages approximately $38 per square foot FSG, Class B space averages around $23 per square foot, and Class C product is available at approximately $18 per square foot.

Most mid-rise and Class A office leases are structured as Full Service Gross (FSG), where the landlord covers operating expenses within the base rent. Smaller office buildings and flex product typically use a Modified Gross or Triple Net (NNN) structure. Medical office space often commands a premium of $3-5 per square foot above comparable general office due to specialized buildout and infrastructure requirements.

Marietta represents a solid value compared to the Cumberland/Galleria submarket to the south, where Class A rents run $5-10 per square foot higher, and the Central Perimeter submarket, where comparable space commands an even greater premium.

Vacancy Rate

The combined Marietta-Kennesaw submarket vacancy rate is approximately 22-23%, broadly in line with the overall suburban Atlanta average. Class A buildings in prime locations near the Franklin Gateway corridor and along I-75 are performing better than this average, while older Class B product in secondary locations faces higher vacancy.

Medical office space in Marietta maintains lower vacancy rates than general office, driven by the healthcare anchor of WellStar Kennestone and the continued growth of outpatient medical practices throughout the corridor. Smaller professional office buildings and owner-occupied properties also tend to maintain higher occupancy rates than the large multi-tenant buildings.

Notable Office Trends

Marietta's office market benefits from several favorable dynamics. The lack of new construction across the broader Northwest Atlanta submarket is allowing existing inventory to gradually absorb, which should support improved vacancy rates over the next 12-24 months. Landlords offering spec suites—pre-built, move-in-ready office spaces—are capturing a disproportionate share of small to mid-size deals.

The continued expansion of healthcare services around WellStar Kennestone Hospital is driving medical office demand, with several medical office buildings seeing strong leasing activity. Cobb County's investment in infrastructure and downtown Marietta's revitalization—including the Marietta Square and surrounding mixed-use development—is creating a more attractive environment for companies seeking walkable, amenity-rich locations within a suburban context.

Lockheed Martin's aeronautics facility remains a significant economic anchor, supporting a network of defense contractors and engineering firms that occupy office space throughout Marietta.

Notable Office Landlords

• WellStar Health System

• The Simpson Org

• Cobb County Government

• Pope & Land Enterprises

• Local private investors (significant market share)

Why Choose Marietta?

Marietta offers an authentic city identity that sets it apart from generic suburban office parks. The Marietta Square—a vibrant downtown with restaurants, shops, a community theater, and year-round events—provides an amenity base that enhances the work experience for employees. This walkable downtown environment is increasingly important for talent attraction, particularly for companies that want suburban affordability without sacrificing the vibrancy of an urban setting.

The city's central Cobb County location provides outstanding access. I-75 connects to downtown Atlanta in 25 minutes, Cumberland/Galleria in 10 minutes, and Kennesaw in 10 minutes. Hartsfield-Jackson International Airport is approximately 35 minutes south. The planned Cobb County transit improvements will further enhance connectivity.

Marietta's healthcare infrastructure—anchored by WellStar Kennestone Hospital—makes it the dominant medical office market in Northwest Atlanta. Companies in healthcare, life sciences, and medical devices benefit from proximity to clinical operations and a robust network of healthcare professionals. The city's housing stock spans from affordable to upscale, supporting recruitment across salary ranges, and Cobb County's strong school system is consistently ranked among the best in Georgia.

Nearby Office Markets

Smyrna — Directly south of Marietta along I-75, Smyrna offers proximity to The Battery and the Cumberland corridor. Class A rents are comparable, but Smyrna's strongest assets benefit from the mixed-use energy of the stadium district.

Kennesaw — North of Marietta on I-75, Kennesaw delivers the lowest lease rates in Northwest Atlanta, making it ideal for tenants prioritizing cost over amenities. The Kennesaw State University talent pipeline is an added benefit.

Central Perimeter — East across I-285, Central Perimeter is the largest suburban office market in Atlanta with institutional-quality product and MARTA rail access. Rents are $8-12 per square foot higher than comparable Marietta space.

Looking for office space in Marietta? Contact Cumberland & Worthy for current availability and a complimentary market analysis. As Cobb County's local office specialists, we track every building and can match your requirements to the right space at the right price.