AC Installation Cost - What It Actually Costs, Quoted Free

How Much Does AC Installation Cost in Marietta?

A full central AC installation in Marietta, GA typically costs between $3,500 and $7,500 in 2026, with most single-family homes landing in the $4,500 to $6,000 range for a mid-efficiency system. That figure includes the outdoor condenser, indoor evaporator coil, line set, electrical work, refrigerant, and labor by a licensed Marietta contractor. A basic 13-14 SEER2 system for a smaller ranch home on the south side of town may come in under $4,000, while a high-efficiency 18-20 SEER2 unit with variable-speed air handler and smart thermostat for a two-story home near Marietta Square can push past $7,500.

The single biggest driver of that spread is equipment efficiency, not labor. Labor in the Marietta market has stayed remarkably steady over the last five years, but the price gap between entry-level and premium condensing units has widened as SEER2 standards went into effect. If you’re replacing an existing system and the ductwork is in good shape, you’re looking at a one-day job for most crews. If the ducts need sealing, modification, or full replacement, expect to add $1,500 to $4,000 on top of the equipment and install cost.

This guide breaks down exactly where that money goes, what changes the final number, and how to avoid overpaying in Cobb County’s competitive HVAC market. We’ll also cover the questions homeowners ask us most often before signing an installation contract.

Key Takeaways

• Typical Marietta AC installation: $3,500 – $7,500 complete, with most homes at $4,500 – $6,000.
• Replacement vs. new construction: replacements cost $500 – $1,200 less because electrical and pad work often already exist.
• Ductwork condition matters: bad ducts can add $1,500 – $4,000 to the job.
• Efficiency rating (SEER2) drives cost more than any other single factor.
• Written quotes are standard practice for reputable Marietta contractors, and you should never pay for an estimate.

If you want a specific number for your home rather than a range, call us at (478) 662-5175. Estimates are free, and no work starts until you have a written price in hand.

AC Installation Cost Breakdown (2026)

Here’s how a typical Marietta AC installation breaks down by line item. These are real ranges we see on quotes across Cobb County, from Powder Springs to East Cobb and everywhere in between.

Line Item	Typical Cost Range (Marietta, 2026)
Condensing unit (outdoor)	$1,800 – $3,800
Evaporator coil (indoor)	$600 – $1,400
Air handler or furnace integration	$400 – $1,200
Refrigerant charge (R-410A or R-454B)	$200 – $500
Electrical disconnect, whip, and breaker	$150 – $400
Condenser pad and risers	$100 – $250
Line set (copper, up to 25 ft standard)	$150 – $350
Labor (typically 6 – 10 hours)	$800 – $1,800
Permit and Cobb County inspection	$75 – $200
Thermostat (if replaced)	$100 – $400

Those numbers are for a standard horizontal or upflow system in a typical Marietta home. The reason the total doesn’t just equal the sum of the parts is that contractors bundle most of these into a single quoted price, often with some margin built into equipment rather than broken out as separate charges. That’s normal and not a red flag. What matters is that the quote is written and itemized enough for you to compare apples to apples.

One thing that surprises a lot of homeowners in Marietta: the permit cost is real, but small. Cobb County requires a mechanical permit for AC replacement, and the inspection ensures the installation meets current code. Any contractor who skips the permit to save you $100 is cutting a corner you don’t want cut. It also protects you if you sell the home later and the new buyer asks for documentation.

Need a written breakdown for your specific house? Call (478) 662-5175 and we’ll walk you through it, line by line, before you commit to anything.

What Affects AC Installation Pricing in Marietta

No two Marietta homes are priced exactly alike, but the factors that move the needle are consistent. Here’s what we see moving quotes up or down across the county.

• Home size and cooling load. A 1,200-square-foot bungalow near Kennesaw Avenue needs roughly 2 tons of cooling. A 3,200-square-foot home in a West Cobb subdivision may need 4 to 5 tons. More tonnage means a larger condensing unit and coil, which pushes equipment cost up by $800 to $1,500 per additional ton.
• Efficiency rating (SEER2). A 14.3 SEER2 unit meets minimum federal standards and costs the least. Moving up to a 16-17 SEER2 two-stage unit adds $1,200 – $2,500. A variable-speed 19-20 SEER2 system can add $3,000 or more. In Marietta’s hot, humid summers, the two-stage units earn their keep in comfort, but the payback math on the highest-efficiency systems is usually longer than most people expect.
• Ductwork condition. This is the wildcard. Homes built before 1990 in neighborhoods like Sherwood Forest or Maple Avenue often have ductwork that’s undersized for modern systems, leaking at the joints, or simply worn out. Sealing and modifying ducts adds $800 – $1,800. Full duct replacement runs $3,000 – $6,000. We always inspect ducts before quoting, because a great AC on bad ducts is a bad system.
• Existing equipment type. If your home has a gas furnace and you’re replacing the AC side only, the job is straightforward. If you have an all-electric package unit or a heat pump, the conversation changes and may involve swapping the air handler too. Homes that came with a builder-grade Goodman or Rheem from the early 2000s typically have matching coils that need replacing at the same time, which is already in the numbers above.
• Access and pad conditions. If the condenser sits on a rotted wooden platform, a slope that’s shifted, or in a tight corner behind a fence, expect added labor. A new composite pad with risers is standard on every install and already included in the ranges we’ve quoted. But if the old pad sank into Georgia red clay and needs excavation or regrading, that’s an extra $150 – $400.
• Time of year. Marietta HVAC companies are busier from May through September than any other stretch. That demand doesn’t usually change the parts price, but it can affect scheduling. A late-fall or early-spring install often gets faster turnaround. We honor the same written price whenever you schedule, so this factor is more about convenience than dollars.

Every home is different, and the only way to know your real number is to have a technician look at the equipment, the ducting, and the electrical. That’s why AC installation in Marietta should always start with an in-person visit, not a phone quote based on square footage alone.

Brand Considerations: What Equipment Are You Actually Paying For?

Brandt HVAC services and installs all the major residential brands you’ll see on Marietta quotes: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. Here’s what we’ve observed about each tier, plain-spoken.

Goodman and York land at the lower end of the price range. The equipment is solid and the warranty coverage has improved noticeably over the last decade. These brands make sense when budget is the top concern and you plan to stay in the home long enough that the 10-year parts warranty covers you. Rheem and Bryant sit in the middle: strong reliability, good parts availability in the Atlanta metro, and pricing that’s fair without being premium.

Trane, Carrier, and Lennox command the highest prices. Part of that is brand reputation, but some of it is real product differentiation: quieter operation, better dehumidification in staged systems, and denser coil construction. Daikin and American Standard round out the field, with Daikin offering some of the longest base warranties on their higher-end units.

What matters more than the badge on the condenser is the install quality behind it. A poorly installed top-tier Trane will underperform a well-installed Goodman every single time. We’ve fixed enough botched installs across Cobb County to say that with certainty. When we quote a system, we price the brand you want but install it to the same standard regardless of brand: nitrogen purge during brazing, proper evacuation to a deep vacuum, subcooling and superheat verified with gauges, and a start-up report left with you at the end of the job.

SEER2 Ratings Explained (In Plain Language)

Federal efficiency standards changed in 2023, and Marietta homes now use the SEER2 rating system. SEER2 stands for Seasonal Energy Efficiency Ratio, second edition. It’s a lab test that rates how much cooling a unit produces per unit of electricity consumed, under conditions that more closely match real-world ductwork than the old SEER test did.

The minimum for new AC installations in Georgia is 14.3 SEER2, which replaced the old 13 SEER minimum. Every system installed in a Marietta home now must meet or exceed that. In practical terms, a 16 SEER2 unit runs about 12% more efficient than a 14.3 SEER2 unit of the same size. That works out to roughly $120 to $180 per year in electricity savings for a typical 2,000-square-foot Marietta home, depending on Georgia Power rates and how aggressively you run the AC from June through September.

The upsell to 18-20 SEER2 is not automatically the right call. Those variable-speed systems deliver better humidity control and quieter operation, which matters in Marietta’s July humidity. But if your ducts are old and leaky, you’ll never feel the efficiency benefit. Spend money on the ducts first, then the equipment. A good contractor will tell you that before trying to sell you a premium unit.

How Much Does AC Installation Cost by Home Size in Marietta?

Here’s a quick reference for what we see on quotes across different home sizes in the Marietta market. These assume standard 8-foot ceilings, average insulation, and ductwork in usable condition.

• 1,000 – 1,400 sq ft (2-ton system): $3,500 – $4,800
• 1,400 – 2,000 sq ft (2.5 to 3-ton system): $4,200 – $5,800
• 2,000 – 2,800 sq ft (3.5 to 4-ton system): $5,000 – $7,000
• 2,800 – 3,500+ sq ft (5-ton or zoned system): $6,500 – $9,500+

Homes in older Marietta neighborhoods often need more cooling per square foot than newer builds. A 1950s ranch on Slopeside Lane with original insulation and single-pane windows may need the same tonnage as a newer, tighter home twice its size. That’s why we run a load calculation (Manual J) before recommending equipment size. Guessing on tonnage based on square footage alone is how you end up with a unit that short-cycles and never pulls the humidity out of the house.

Replacement vs. New Installation: What’s the Difference in Marietta?

Most Marietta projects are replacements, meaning there’s already an AC system in place and you’re swapping it out. A true new installation, where no ducted system has ever existed, is more involved and more expensive.

Replacement AC installation typically runs $3,500 – $7,500 as quoted above. The electrical service exists, the refrigerant lines are routed, the pad is there (or close enough), and the duct connections are configured. The crew disconnects the old unit, recovers the old refrigerant per EPA rules, and installs the new equipment in its place. Most replacements are done in a single day.

New construction or first-time central AC (for example, converting a home that ran on window units or a swamp cooler) adds major costs: running new line sets, possibly upgrading the electrical panel from 100 to 200 amps at $2,000 – $4,000, adding return ductwork, and cutting new supply registers. Total cost for a from-scratch install in a Marietta home can run $8,000 to $14,000 or more. If you’re in this situation, get at least three written quotes and ask each contractor where they’d place the condenser unit and why. That answer tells you a lot about how they think.

How to Save on AC Installation

Saving money on AC installation in Marietta isn’t about finding the cheapest guy with a truck. It’s about timing, due diligence, and not paying for things you don’t need. Here’s what actually works.

1. Get quotes in the off-season. HVAC contractors in Marietta are slowest from late September through February. You’ll often get faster scheduling and sometimes modest discounts on equipment the distributor is trying to move before the next model year. The same written quote we give you on a Tuesday in October is the one we honor.
2. Replace before the system dies completely. A failed compressor on a 15-year-old system in August means you’re installing on a timeline and in a demand surge. A planned replacement lets you compare quotes, choose equipment deliberately, and schedule when it suits you.
3. Don’t pay for tonnage you don’t need. Some contractors oversize systems because bigger equipment means a bigger invoice. A properly sized 3-ton system cools better and runs more efficiently than an oversized 4-ton. Make sure your contractor shows you the load calculation.
4. Check for manufacturer rebates and utility incentives. Georgia Power occasionally offers rebates for qualifying high-efficiency heat pumps. Your contractor should know what’s current and fill out the paperwork for you. Rebates of $300 – $800 are common on qualifying systems.
5. Ask what’s included in the quote. The cheapest written quote isn’t always the best deal. What matters is whether the number includes the permit, the pad, the new disconnect box, the thermostat, and the start-up. A $4,800 quote that’s complete beats a $4,400 quote that comes back with $900 in surprise add-ons on install day.

We give free estimates with a written price before any work starts, always, on every job. Call (478) 662-5175 to schedule one. There’s no fee for the visit and no obligation on your end.

How the Installation Process Works (Step by Step)

Here’s what a typical AC installation looks like from the homeowner’s perspective, so you know exactly what to expect. This is the process we follow on every job, and it’s the same process we’d recommend you insist on from any contractor you hire in Marietta.

1. Home visit and load calculation. A technician walks the house, measures rooms, checks insulation levels, looks at existing ductwork, and inspects the electrical panel. We use a Manual J calculation to determine the correct system size. This visit is free.
2. Written quote. Before you agree to anything, you get a written price that itemizes equipment brand and model, tonnage, SEER2 rating, and what’s included. No work starts until you’ve seen and signed that number.
3. Permit pulled. We file the mechanical permit with Cobb County and schedule the inspection for after the install. The permit fee is included in the quoted price.
4. Install day. The crew arrives, confirms the scope with you at the door, and begins work. The old unit is disconnected and removed per EPA refrigerant recovery rules. The new condenser is set on a new pad, the coil is installed, line sets are connected, and the system is evacuated and charged. Most replacements take 6 to 10 hours.
5. Start-up and walkthrough. Once the system is running, we verify airflow, check refrigerant pressures, and test the thermostat in both cooling and heating modes where applicable. We walk you through the thermostat and filter location before we leave.
6. Final inspection. Cobb County inspects the installation to confirm it meets code. Once it passes, the permit is closed and you have documentation for your records.

At Brandt HVAC, every technician who steps onto your property is someone we’ve already told you about: name, photo, and a short introduction sent before they arrive. When they ring the doorbell, you’ll see a photo ID badge before they cross the threshold. That’s our Threshold Verified standard, and it applies to every visit, not just installations.

What Does the 365-Day Done Right Promise Cover?

Every installation and repair we do in Marietta carries a 365-Day Done Right Promise. What that means in plain English: if something we installed doesn’t work the way it should within a year of installation, we return and fix it at no charge. No argument about blame, no pro-rated labor fees, no “that’s not covered” runaround.

The equipment itself also carries manufacturer warranty coverage, typically 10 years on parts (including the compressor) when the system is registered within 60 days of installation. We register the warranty for you and keep the paperwork on file. If a part fails under warranty, you pay nothing for the part itself. Labor beyond year one is covered under our standard repair pricing, which we’ll quote in writing before any work begins.

This guarantee is in writing, on every job, with the terms stated clearly. That’s a Brandt HVAC habit we’ve kept since Devin Marlowe started running this location: if it’s not in writing, it’s not a promise.

Marietta-Specific Installation Considerations

Marietta has a few quirks that affect AC installation more than people expect. If you’ve lived here for years, you probably already know the humidity is the real enemy, not the heat. But here’s what that means for equipment choices.

Humidity control matters more than raw cooling. A single-stage unit blasts cold air and shuts off, which does a poor job pulling moisture out of the air. A two-stage or variable-speed unit runs longer at lower output, stripping humidity out consistently. In a Marietta summer, that’s the difference between a house that feels like a refrigerator and one that feels dry and comfortable at 76 degrees. If you’re choosing between a higher SEER2 rating and a two-stage compressor, take the two-stage.

Clay soil shifts condenser pads. Georgia red clay expands when wet and shrinks when dry. Over a decade, that can tilt a condenser pad enough to strain the refrigerant lines. On every install we set the pad on compacted gravel and use risers to keep the unit off the ground. It’s a small thing that prevents a big repair later.

Pollen and pine needles clog outdoor coils. Marietta’s spring pollen season is brutal on outdoor units, especially in neighborhoods with mature pines. A coil that gets packed with pollen loses airflow and drives up energy use. We recommend you check the condenser coil a few times each spring and rinse it with a garden hose (with the power off). It’s an easy habit that extends the life of the unit.

Is It Cheaper to Repair or Replace?

This is the question we field most, and here’s the honest math we give every homeowner in Marietta.

If your system is under 10 years old and the repair cost is under $800, repair almost always makes more sense. An AC repair in Marietta runs $150 – $650 for most jobs, and a well-maintained unit under a decade old still has years of useful life left.

If your system is 10 – 15 years old and the repair quote is over $1,500, or the failure is a compressor or leaking evaporator coil, replacement usually wins. Compressor replacement on an aging system run $1,800 – $3,200 by itself, and you’re putting that money into a unit that may need another major repair next season. At that point, applying that budget toward a new installation with a fresh 10-year parts warranty is the smarter long-term play.

If your system is over 15 years old and uses R-22 refrigerant (phased out of production in 2020), the math tilts hard toward replacement. R-22 is still available but expensive, and it will only get scarcer. A system that needs a refrigerant top-up to the tune of $200 – $400 per pound is a money pit. Replace it.

Want a straight answer on your specific system? Call (478) 662-5175 and we’ll assess it honestly, even if the answer is “this repair is worth doing.” We don’t push replacements where repairs make sense.

FAQs – AC Installation Cost in Marietta

How much does AC installation cost in Marietta in 2026?

AC installation in Marietta costs $3,500 to $7,500 for most homes, with the average project landing between $4,500 and $6,000. The final number depends on system size, efficiency rating, ductwork condition, and the brand you choose. Call (478) 662-5175 for a free written estimate on your specific home.

How much does a 3-ton AC unit cost installed in Marietta?

A 3-ton central AC system installed in Marietta typically costs $4,200 to $6,200 complete, depending on SEER2 rating and includes the condenser, coil, line set, electrical work, refrigerant, pad, permit, and labor. Mid-efficiency 16 SEER2 units land near the center of that range. Your exact price depends on the condition of your existing ductwork and electrical service.

Can I get AC installation the same week in Marietta?

In most cases, yes. During peak summer months, the schedule fills faster and you may wait 5 – 10 days depending on the week. During fall, winter, and early spring, we can usually schedule installation within 48 – 72 hours. Call (478) 662-5175 and a live person will give you current availability, day or night.

Is a permit required for AC installation in Marietta?

Yes. Cobb County requires a mechanical permit for air conditioning replacement or new installation, and the permit typically costs $75 – $200 as part of the project. A good contractor includes the permit in the written quote and handles the inspection scheduling. Anyone offering to skip the permit is saving you a small amount of money in exchange for a real liability down the line.

How long does AC installation take in Marietta?

Most residential AC replacements in Marietta are completed in one day, typically 6 to 10 hours. New installations that require ductwork, panel upgrades, or line-set runs through finished spaces can take two to three days. Before your install date, you’ll know the expected timeline in writing.

Is it cheaper to install AC in the winter in Marietta?

Sometimes, yes. You’ll find faster scheduling and occasionally discounted pricing from distributors clearing inventory between November and February. The equipment itself costs the same, but the convenience factor is real if you can plan a replacement before your old system fails in July. Call (478) 662-5175 and we’ll quote your project no matter the season.

Why Homeowners in Marietta Choose Brandt HVAC

We know you have options in Cobb County. Here’s why we think a call to us is worth making, stated plainly.

Every job starts with a written price before any work begins. Not an estimate range, not a ballpark, not “we’ll see once we’re in there.” A number in writing, on every single job, with no work starting until you’ve read and agreed to it. We’ve done it that way since day one, and Devin Marlowe makes sure it stays that way.

Every technician we send to your Marietta home is background-checked, uniformed, and introduced to you by name and photo before they arrive. When the doorbell rings, you know exactly who’s on the other side and you’ll see a photo ID badge before anyone steps inside. We call it the Threshold Verified standard. If someone shows up who we didn’t tell you to expect, that’s on us.

And when you call us, a live person answers. Not a voicemail, not a callback queue, not a phone tree. Twenty-four hours a day, seven days a week, including holidays. If your AC dies on a July night in Marietta, you’ll talk to a human being on the first ring.

The name Brandt comes from an old word for a firebrand, a fitting name for the work of keeping a home warm. What started in 2003 as part of the Threshold Group family of home-service companies has become something simpler: the HVAC company for people who want to know exactly who’s walking through their door.

If you’re ready to replace your AC or just want a straight answer on what it would cost, call (478) 662-5175 today. The estimate is free, the price will be in writing, and the person you speak with will be a real human who treats your home like it matters. Because it does.

Pricing reflects the Marietta market as of 2026. Brandt HVAC Co Marietta offers free estimates – call (478) 662-5175.

Written by Devin Marlowe, Owner at Brandt HVAC Co Marietta, serving Marietta since 2003.