How much does a detached garage cost in Columbia, SC?

A detached garage in Columbia, SC typically runs $70 to $160 per square foot, shell to finished. That puts most builds between about $16,800 for a 1-car at the Good finish level and $115,200 for a fully finished 3-car. These are typical ranges, not a quote. Your exact number is set in writing.

What size detached garage do most homeowners build?

A 2-car detached garage (around 440 square feet) is the most common in the Midlands, typically landing between roughly $30,800 and $70,400 depending on finish level. One-car builds start near $16,800, and 3-car builds reach toward $115,200 when fully finished and conditioned.

Does Chonko Construction give a fixed price before work starts?

Yes. Chonko Construction is a licensed South Carolina home builder (SC license #52210), and every detached garage build comes with the full scope, schedule, and a fixed price in writing before we break ground. Any change is priced and approved first, so there's no surprise billing.

What's the difference between the finish levels?

Good is a clean, functional shell at about $70 per square foot. Better adds insulation, a finished interior, and upgraded doors at about $104. Best is a fully finished, conditioned space (ready for a shop, gym, or studio) at about $160 per square foot.

Detached Garage Cost in Columbia, SC (2026 Builder's Price Guide)

A detached garage cost in Columbia, SC typically runs $70 to $160 per square foot, shell to finished, depending on finish level, so a new detached garage in the Midlands usually lands somewhere between $16,800 and $115,200. Where you fall in that band comes down to size (one, two, or three cars), how finished you want the interior, and the site you're building on. These are typical ranges, not a quote. Your exact number gets set in writing before any work starts.

What a detached garage costs by finish level

Three finish levels cover most builds. "Good" is a clean, functional shell. "Better" adds insulation, a finished interior, and upgraded doors. "Best" is a fully finished, conditioned space ready for a shop, gym, or studio.

Finish level	Per sq ft	1-car (~240 sq ft)	2-car (~440 sq ft)	3-car (~720 sq ft)
Good (functional shell)	$70	~$16,800	~$30,800	~$50,400
Better (insulated, finished)	$104	~$24,960	~$45,760	~$74,880
Best (fully finished, conditioned)	$160	~$38,400	~$70,400	~$115,200

Typical total band across the Midlands: about $16,800 (1-car Good) to $115,200 (3-car Best).

Size, door count, and whether the space is finished set the band.

What decides where your garage lands in the band

Size and bay count. A 3-car footprint is roughly three times the structure, slab, and roof of a 1-car, the single biggest lever on total cost.
Finish level. A bare shell versus an insulated, drywalled, conditioned interior is the difference between $70 and $160 per square foot.
Site and slab work. Grading, a thicker slab, and drainage on a sloped or wooded lot add cost before the walls go up.
Doors, windows, and electrical. Insulated overhead doors, added windows, and a sub-panel for outlets and lighting all move the number.
Roofline and match. Tying the roof pitch and siding to your existing home costs more than a plain gable, but it's what makes the garage look original to the property.
Permits and access. Columbia and Lexington/Richland permitting, plus how easily trucks can reach the build area, factor in.

Slab thickness, apron, and electrical service are the usual omissions.

What gets left out of a stripped-down garage bid

Garage quotes diverge in the same handful of places every time. These are the lines to hunt for.

The slab and what sits under it. A garage slab needs a compacted base, a vapor barrier, reinforcement, and a thickened edge or footing carrying the walls. A bid that says only "concrete slab" is not telling you which of those you are getting, and none of it can be added later.
The electrical. A detached garage is a separate structure, so real power means a buried feeder and its own panel, not a cord run from the house. Lighting, receptacles, and the opener circuit all hang off that decision.
The permit and the inspections. Richland and Lexington County want a permitted, inspected structure. Someone pays for that and manages the schedule around it, and if it is not on the bid, it is not the builder.
The final grade. Water has to leave the slab. Backfill, grading, and the approach from the driveway get cut from thin bids and get noticed the first hard Midlands rain.
Door and roof spec. Insulated overhead doors, and roofing and siding chosen to match the house, are line items. Left unwritten, they default to whatever is cheapest that week.

Everything the garage quote names

Full written scope, slab, framing, roofing, doors, siding, and electrical spelled out line by line, with nothing assumed.
A fixed, no-surprise price, set in writing before we break ground, with any change priced and approved before it happens.
A real schedule, start date, milestones, and finish, so you know what's happening and when.
One accountable builder, Chonko Construction is a licensed South Carolina home builder (SC license #52210), and one team owns the result end to end.
Permits and inspections handled, we pull the permits and manage the Midlands inspections for you.
A final walkthrough, we walk the finished garage with you and don't call it done until you agree it is.
A named workmanship warranty, your build is backed by the Chonko Construction Workmanship Warranty, in writing.

A simpler structural system buys square footage back.

Where to spend and where to hold back

Settle bay count and finish level early. Decide bay count and finish level up front. Mid-build changes are where budgets slip.
Match finish to use. A shop or studio earns the "Best" conditioned build; simple storage rarely does. Don't over-finish square footage you'll only park in.
Build for the lot you have. A flat, accessible site keeps slab and grading costs down. Factor your lot in before you fall for a footprint.
Rough in now for what you want later. Running conduit, an extra circuit, or a floor drain while the slab and walls are still open costs a fraction of cutting them in afterward, so decide what the garage may need to do one day and stub for it now.

If you're weighing a new detached garage, a short conversation is the easiest next step. Call Chonko Construction for a free phone consultation. We'll talk through size, finish, and your site, and give you a clear picture of where your project lands before anything is in writing.