GreatHouse is a design-build firm specializing in home additions and extensions in East Cobb, Marietta, Roswell, and Sandy Springs for over 20 years.
Many homeowners face the same crossroads: move or add on. Staying in a neighborhood you love has real advantages, so the first step is understanding why you want more space. Is it truly a square footage issue, or could a better layout solve it? Then consider your lot, setbacks, HOAs, and long-term plans like aging in place — all factors that shape what’s possible.
It also helps to understand addition costs early. While they can surprise homeowners, additions add valuable living space and significantly increase home value, making clear budgets essential from the start.
GreatHouse begins every home addition in East Cobb, Marietta, Sandy Springs, or Roswell with a Preconstruction Phase, including a site assessment and feasibility study. From there, we design a footprint that ties naturally into your home, followed by finishes that blend new and existing spaces seamlessly.
When clients tell us their addition feels like it was always part of the house, that’s Great Living. Click here to explore recent projects and start planning your expansion.
Click here to view our portfolio of projects, and reach out if you’re ready to expand the home you already love!
Popular Types of a GreatHouse Home Additions
Second Story Additions
When your home’s footprint has reached its limit, a second story can open new possibilities. We design and build full upper-level additions that blend beautifully with your home’s style, creating additional bedrooms, bathrooms, or flexible living areas without sacrificing outdoor space or your neighborhood location
Primary Suite Additions
Adding a primary suite on the main level offers convenience, comfort, and privacy. It can also be the perfect solution for aging-in-place and having your home fit your needs in any season. These spacious retreats often include custom walk-in closets, spa-inspired bathrooms, and sitting areas that turn everyday living into a luxury experience.
Kitchen Expansions
The kitchen is the heart of your home, and sometimes it needs a little more room. Expanding your kitchen can improve layout, increase storage, and enhance the way you cook and connect with family and friends.
In-Law Suites and Guest Suites
Create a welcoming and independent space for family or guests. Whether attached to your home or designed as a separate wing, in-law suites and guest additions provide comfort, accessibility, and privacy while keeping loved ones close.
Sunrooms and Screened Porches
Enjoy Georgia’s mild seasons with a custom sunroom or screened porch addition. These spaces invite natural light, expand your entertaining area, and create a seamless transition between indoor comfort and outdoor living.
Garage Conversions
Transform an underused garage into a finished living space that fits your lifestyle. From guest suites and offices to recreation rooms, our team ensures every detail, from insulation to finishes, matches the same level of quality as the rest of your home.
Basement Renovations and Conversions
Your basement holds incredible potential. We turn unfinished or dated basements into fully livable spaces such as home theaters, gyms, or private guest suites, all designed with the same craftsmanship and attention to detail as your main living areas.
Bathroom Additions
Adding a bathroom brings both convenience and long-term value. From elegant guest baths to luxurious ensuites, we create spaces that are functional, comfortable, and perfectly integrated into your home’s design.
Bonus Rooms and Flex Spaces
Need a dedicated office, playroom, or creative studio? A custom bonus room addition offers versatility for today’s modern living. We design flexible spaces that can evolve with your family’s needs over time.
Where We Remodel
Home Additions in East Cobb, Marietta, Roswell, and Sandy Springs
For more than twenty years, GreatHouse has been building home additions that enhance comfort, expand living space, and elevate the way families live throughout North Atlanta. Each community we work in has its own unique character, and our team understands how to design and build additions that blend seamlessly with your home and feel right at home in every neighborhood.
East Cobb Home Additions
East Cobb homeowners value refined, family-friendly design. Remodeling here often focuses on modernizing traditional layouts, improving functionality, and adding timeless touches that reflect the area’s welcoming, well-established neighborhoods.
Roswell Home Additions
Roswell is known for its blend of Southern charm and modern elegance. Homeowners here often prioritize open kitchens, outdoor living, and calm, light-filled interiors that connect naturally with the area’s scenic surroundings.
Marietta Home Additions
Marietta’s mix of historic homes and newer builds creates unique remodeling opportunities. Many homeowners choose to update older layouts, enhance natural light, or add space while preserving the character and charm that define Marietta living.
Sandy Springs Home Additions
In Sandy Springs, remodeling projects often focus on sophistication and comfort. GreatHouse helps homeowners create functional spaces, refresh outdated interiors, and achieve a clean, modern look that fits this vibrant North Atlanta community.
Home Addition FAQs
How much does a home addition cost in East Cobb and Marietta?
Home addition costs in East Cobb, Marietta, Roswell, and Sandy Springs typically start around $200,000 for major additions to the main house and can increase based on size, finishes, and complexity. Smaller projects, such as garage or workshop additions, often begin near $70,000, while larger, more customized additions like ADUs or pool houses can start at $300,000 or more. Each project is unique, and our design-build team will help you define a scope and budget that align with your vision and your home.
What types of home additions add the most value in East Cobb and Marietta?
Additions that expand everyday living spaces or maximize the useful life of a home tend to add the most value for Atlanta-area homes. These include primary suite additions, kitchen expansions, and in-law suites, all of which enhance functionality and appeal to future buyers. Screened porches and outdoor living additions are also highly desirable in Georgia’s climate, providing year-round enjoyment and improving your home’s curb appeal.
How long does a home addition project take from start to finish?
A typical home addition in the Atlanta area takes between 4 and 8 months, depending on the size and complexity of the project. Smaller additions such as family room additions may take closer to 4 months, while full second-story or multi-room additions can take 6months or more. At GreatHouse, we manage every step of the process through our structured design-build timeline, which includes exploration, preconstruction, project prep, construction, and final wrap-up.
Will my home addition blend seamlessly with the rest of my house?
Absolutely. One of the benefits of working with GreatHouse is our commitment to architectural continuity. Our design team carefully considers your home’s existing structure, materials, and style so that your new addition feels like it was always meant to be there. From exterior finishes to interior details, we create cohesive designs that look and feel natural.
Do I need permits for a home addition in East Cobb and Marietta?
Yes, all structural additions in Cobb County and surrounding areas require permits to ensure safety and compliance with local building codes. As a licensed design-build contractor, GreatHouse handles the entire permitting process for you. Our team has extensive experience working with local municipalities throughout East Cobb, Marietta, Roswell, and Sandy Springs, making the process smooth and efficient. We will also coordinate with the county on your behalf if a variance is required for your addition.
What is included in GreatHouse’s home addition services?
Our design-build approach means we handle everything under one roof, from concept and architectural design to construction and finishing. This includes layout planning, structural engineering, selections, and professional project management. We also provide full access to your JobTread Customer Portal, where you can view daily updates, financial details, and photos in real time. The result is a well-coordinated, transparent experience that keeps your project on track and stress-free.
How can I get started planning my home addition?
The best way to begin is by scheduling an Exploration Meeting with our team. During this first step, we’ll discuss your goals, ideal budget, and timeline, and discuss next steps. You can also explore our Investment Guide to get a sense of typical pricing for additions and other remodeling projects in the Atlanta area.