The right type of garage depends on the lot and what goes inside. On a subdivision lot near McDonough, it usually has to look like the house. On five acres outside Barnesville, a metal or post-frame building may be the better buy. HomeGuide's national figures below show how the types compare.
Every dollar figure on this page is a national figure published by HomeGuide, not a quote from us. HomeGuide publishes no garage prices for Georgia or for Griffin, and the clay, slope, drive length and finish on your lot all move the real number. Figures read on homeguide.com in October 2026.
Is a metal or prefab garage kit cheaper than a stick-built garage?
Yes, a prefab or kit garage usually costs less up front. HomeGuide puts a prefab two-car garage at $7,200 to $26,000 for the unit only, or $11,000 to $37,500 with foundation and assembly, against $25,000 to $60,000 for a custom-built two-car. Its only installed metal garage figure is a 20 x 20 prefab metal garage at $11,000 to $30,000. The kit price leaves out the slab, delivery and any finishing.
Does a steel garage last as long as a wood-framed one?
A steel garage can last as long as a wood-framed one if rust and condensation are kept in check, which matters in Georgia's humid summers. Bare steel walls sweat when warm, wet air hits them, so ask about a vapor barrier or insulation; HomeGuide's outbuilding page puts condensation control at $1 to $3 per square foot. Wood framing resists sweating but needs paint, flashing and termite protection. Either lasts when water is kept off the base of the walls.
Is a pole barn or post-frame garage a good choice?
A pole barn or post-frame garage is a good fit on acreage around Hampton, Thomaston and rural Spalding County, where looks matter less than space. HomeGuide puts pole barns at $15 to $40 per square foot installed, and a simple two-car pole barn garage at $6,000 to $23,000, against $25,000 to $60,000 for a standard two-car garage on the same page. The posts sit in the ground instead of on a full foundation, so ask how the post bases are protected from wet clay and rot.
Should I build a carport or a garage?
Build a carport if you mainly want shade and shelter from hail and pine sap, and a garage if you want security, storage or a workshop. HomeGuide puts a double carport at $3,200 to $12,000 installed, with a national average of $6,000 for carports. A carport also needs strong anchoring here, because summer storms push hard on an open roof.
Can a carport be enclosed into a garage later?
Yes, a carport can often be enclosed and turned into a garage later if its posts, roof and slab are strong enough to take walls. HomeGuide puts a carport-to-garage conversion at $10,000 to $40,000 typically, or $20,000 to $40,000 for two cars. Many older ranches around Griffin and Jonesboro have exactly this kind of attached carport.
Can I add a garage to a house that has no garage?
Yes, you can add a garage to a house that has none, either attached to the side or detached at the back. HomeGuide publishes no price for adding a new attached garage to an existing house as its own item; the closest figure is $25,000 to $60,000 for an attached two-car garage. The lot decides which way works: side setbacks, the drive and the roof line of the house all matter.
Can a detached garage have a bathroom and plumbing?
Yes, a detached garage can have a bathroom, but plumbing is one of the biggest add-ons. HomeGuide's detached garage page puts plumbing at $450 to $1,800 per fixture, and its conversion page puts a full bathroom addition at $20,000 to $30,000 or more. The waste line has to reach the sewer or septic system, which on a long county lot can mean a long trench. On septic, the system must also be able to take the extra load.
What does a workshop garage need?
A workshop garage needs more power than a parking garage, good light, and room to work around the bench. HomeGuide puts a subpanel at $500 to $1,700, and its outbuilding page says a heavy-duty 200-amp subpanel for power tools and welders adds $2,000 to $5,000. Plan the outlets, a wider side door, ceiling height and ventilation before framing, since adding them later costs more.
How much does an RV or boat garage cost?
HomeGuide puts an RV garage at $50,000 to $160,000. Boats and campers are common on lake lots near Stockbridge and on farm properties south of Griffin, and the extra door height drives both wall height and roof cost.
Want a price for your own lot? We come out, look at the ground, the drive and where the garage can go, then put the size, materials and price in a written quote. Call or text (678) 661-6646.