What we do
Residential heating and cooling, commercial HVAC, and air duct cleaning — handled by the same team, start to finish.
For your home
AC and heating repair, replacement and maintenance for homes across metro Atlanta and the I-75 south corridor. We diagnose it ourselves and tell you what the system actually needs.
For your building
Rooftop units, split systems and scheduled maintenance for offices, retail and rental portfolios. Property managers across the Atlanta area keep McGrath on speed dial for a reason.
For the air you breathe
Dust, dander and allergens collect in your ductwork and then circulate through every room. We clean the system out so your air handler moves clean air instead of recycling what settled.
Why choose McGrath Mechanical
No gimmicks — just honest diagnosis, quality work, and a company that stands behind it.
We find the real problem before we talk price. If the honest answer is a repair instead of a new system, that is what you get.
The team that answers the phone is the team that diagnoses the system and stands behind the work — no call center, no rotating mystery techs, no re-explaining the problem.
When another HVAC company says a system is beyond fixing, that is often exactly when we get the call — and more often than you would think, there is still a real fix on the table.
Reach a real person, get a straight answer, and get on the schedule — not a call center and a four-hour window.
You are told what the system actually needs, and priced for that — not for whatever pads an invoice.
From a three-bedroom home to a multi-property portfolio, every job gets the same diagnosis-first approach and the same people standing behind it.
4.9
Google rating
Across 18 reviews
18
Google reviews
Every one rated 4★ or higher
16
Five-star reviews
Out of 18 total
I-75
Atlanta → Macon
Metro Atlanta & the south corridor
See every review for yourself on our Google listing.
How it works
From your first call to the final test, you are working with the same team the whole way.
Step 1
Tell us what the system is doing and we will set a time that actually works for you — a real person picks up, not a script.
Step 2
We find out exactly what is wrong and explain it in plain language — including when the honest answer is a repair instead of a replacement.
Step 3
The repair or install gets done properly the first time, at a fair price with no surprises on the invoice.
Reviews
4.9 stars on Google. Here’s what people are saying, word for word.
McGrath Mechanical is my go to choice for HVAC repairs and installation. As a property manager of properties all over the Atlanta area, I need a reliable HVAC source that will show up, diagnose the problem correctly, tell me the truth and make the repair at a reasonable cost. McGrath does exactly that! New system installations are efficient and affordable as well. I highly recommend James at McGrath Mechanical!
If he says he will be there then he will. James is fast, reliable, and gets the job done. I thought I needed a new unit but that wasn’t the problem. After about 30 minutes he had us up and running again. Any questions I had he was able to give me an answer. Highly recommend
I’ve been using James for 20+yrs they have always fit me in there schedule never waited 3or 4 days really knowledgeable friendly service is great very well priced explains what’s going on shows you the parts he replaced makes you feel like they really care about your business 5 stars all the way
We have relied on James McGrath on multiple occastions. He is one of the best contractors we have ever used. He is incredibly responsive, knowledgeable, and does a great job for a reasonable price.
James has been my a/c guy/friend for years. He installed a new hvac system for me a few years ago. Anything I need he is there. His experience and knowledge is why I trust him and will call on him for my hvac needs. His prices are the best in the business.
I’ve used McGrath mechanical for all my HVAC needs for over a decade, multiple residential and commercial properties. Highly recommend!
Where we work
Based in Stockbridge — across the metro, west through Douglasville and Paulding, east to Covington, and south down through Griffin and Forsyth into Macon.
Don’t see your town? Call (404) 423-9371 and ask — we’ll tell you straight.
Stockbridge · McDonough · Hampton · Locust Grove · Ellenwood · Jonesboro · Riverdale · Morrow · Forest Park
Atlanta · Decatur · Stonecrest · Lithonia · Conyers · Covington · Snellville
Douglasville · Villa Rica · Dallas · Hiram · Powder Springs · Newnan · Fayetteville · Peachtree City
Jackson · Griffin · Barnesville · Forsyth · Macon
Good to know
We’re based in Stockbridge and cover metro Atlanta and the I-75 south corridor — Henry County (Stockbridge, McDonough, Hampton, Locust Grove), the south and east metro (Jonesboro, Riverdale, Morrow, Conyers, Covington), and straight down I-75 through Jackson, Griffin, Forsyth and into Macon. Not sure if you’re in range? Call and ask.
Yes. Alongside residential heating and cooling, we service offices, retail spaces and rental portfolios across the metro area — the same diagnosis-first standard on every job, house or building.
No. We diagnose first, every time, and repair whenever a repair is the honest answer. You’ll never be pushed into a new system you don’t actually need.
Yes — that’s a call we get often. Before we agree a system is done, we want to see it for ourselves. Sometimes it really is time to replace it, but it’s surprising how often there’s still a real fix on the table.
Heating, cooling and air duct cleaning across metro Atlanta and down to Macon. Call or request service online — we’ll take it from there.