Home Addition Cost in Atlanta [2025 Data]

Home addition costs in Atlanta average $33,444, and most residents pay somewhere between $13,268 and $55,812. The type of home addition you choose and the square footage you want to add to your home are the most important cost factors to consider. Most homeowners in the city have space on their properties to build out instead of up, which can save hundreds of dollars per square foot on home additions.

Home Addition Cost Factors

Home addition costs in Atlanta, Georgia, can fall as low as $3,000, but some residents pay as much as $90,210 to add square footage to their living space. The size and type of the home addition you want will affect costs the most, but material choices, site preparations, and permits can also play important roles.

Size

Home additions cost between $50 and $150 per square foot if you’re building out and between $150 and $350 per square foot if you’re building up. The cost to add a 10x10 room to a house costs an average of about $10,000 if you build out and around $30,000 if you build up.

The average property size in Atlanta is roughly 0.174 acres, which is close to 7,600 square feet, and the average home size is a little over 1,400 square feet. Most homeowners will have plenty of space on their plots to build out instead of up, drastically reducing home addition costs.

Even among build-outs or build-ups, your total will depend on the complexity of the room and its finishes. For example, adding a bathroom will often cost more than a bedroom since it requires additional plumbing and electrical work.

Materials

As you can imagine, it takes many kinds of building materials to complete a custom home addition. Material prices vary widely, so your price could push closer to $55,812 if you choose luxury or high-end materials at each step of the way. Luxury materials are more appropriate and will provide more value in more expensive neighborhoods, like Tuxedo Park, Kingswood, and Argonne Forest.

Interior materials will mostly vary based on your personal preferences and the quality of the add-on you’re looking for. However, exterior materials need to withstand the area's above-average rainfall and the occasional extreme weather conditions caused by hurricanes and tropical storms moving along the coast. The tables below include some price ranges for exterior materials that withstand the local climate in Atlanta.

Foundation Materials Cost:

Insulation Materials Cost:

Roofing Materials Cost:

Siding Materials Cost:

Window Frame Materials Cost:

Type

The cost to add on a room varies based on the type of home addition you want and the size of the room you’re building. Atlanta residents have decent property sizes that are much larger than you’d find in some major metropolitan areas, so most homeowners have the opportunity to build out rather than build a second-story addition. Building out costs less than half what you’d pay per square foot to build out.

Here’s a look at the average cost of a home addition in Atlanta based on the type of home addition you want. These prices are well below the national average because Atlanta residents tend to opt for smaller add-ons that cost less.

The type of room you want also affects your pricing. Rooms like kitchens and bathrooms require plumbing work that a bedroom doesn’t, while an unfinished attic home addition may not require electrical or HVAC work that a bedroom needs. The cost per square foot for your home addition will vary based on utilities and the finishes required for how you plan on using the extra square footage.

Site Prep

On average, site prep for a home addition costs between $1,500 and $5,000. You may not need any site prep in some cases, while other home addition projects may require grading land, demolishing concrete patios, removing trees, and other work that can add to your total.

Most homeowners in Atlanta choose to build out rather than build up, and while that reduces the overall cost of a home addition in the area, it also increases the average site prep costs. You’re more likely to need land clearing and land leveling to make space for your new addition. Any project requiring excavation will drastically increase your costs, as the soil in Georgia has a heavy clay concentration, making excavation more challenging and time-consuming.

Permits

All major construction work in Atlanta will require building permits, and a home addition is no exception, so you should budget for permit fees to get an accurate all-in cost. The City of Atlanta charges a $300 flat fee for new construction building permits for single-family residences, plus a $50 fee to get a certificate of occupancy for the addition. That brings your total to $350, below the national average.

You may need additional permits if you plan on adding utilities to your new living space. Ask your home addition contractor if you need to budget for other permit costs.

Home Addition Pro Costs

Hiring a homebuilder in Atlanta to handle your home addition will cost you between $13,400 and $20,100 in labor alone, which means labor will account for between 40% and 60% of your total costs. It’s also a good idea to consider sales taxes to get the most accurate estimate possible. The sales tax rate in Atlanta is 8.9%, and given the average cost of building a home addition in the city, you’re looking at sales taxes averaging $2,976.52.

Does a Home Addition Increase Property Value?

Yes, a home addition will increase your home value, as adding livable square footage to your property provides a return on investment (ROI) of between 20% and 50%. Given the average cost of building a home addition in Atlanta, you’ll add an average of between $6,700 and $16,800 to your property value in Atlanta. The average home value in the city is $397,000, so a home addition will increase home value by between 1.7% and 4.2%.

You can maximize your ROI by choosing exterior materials that insulate against the extreme summer temperatures better and can stand up to the excessive rainfall in the city.

How Angi Gets Its Cost Data

Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We survey real Angi customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects. 

Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.