How Much Does Furnace Replacement Cost?

Furnace Replacement Costs Between $3,800 and $8,000 for a Standard Job

Most furnace replacements we quote across Sunnyvale and the Dallas-Fort Worth Metroplex fall between $3,800 and $8,000. A standard job, where we swap an old furnace for a new one using your existing connections with no major changes, usually lands between $4,600 and $6,300. That price covers the equipment, professional installation, standard hookups, startup, testing, and removing your old unit.

The spread in that range comes down to a few real factors. Bigger homes need more heating capacity. So, equipment size and tonnage matter. A higher-efficiency furnace, measured by its AFUE rating, costs more upfront but runs cheaper over the years. Brand and model play a part too. And how easy the furnace is to get to in your attic or closet (we see a lot of attic installs here in North Texas). If your existing ductwork or wiring needs work to meet current code, or if the job calls for permits and inspections, that adds to the total. Custom sheet metal work for an odd attic layout is another thing we see with older Sunnyvale homes.

• Equipment size, capacity, and efficiency rating (AFUE)
• Brand and model chosen
• Ease of access in the attic, closet, or crawlspace
• Condition of existing ductwork and electrical connections
• Code corrections and permits, when required
• Custom fabrication for tight or unusual layouts

What’s not included matters just as much. The quoted price does not cover duct, electrical, or plumbing modifications, code corrections, or permits unless we’ve already spelled those out in your written quote. We won’t add those costs after the fact without telling you first. If your home needs that kind of work, we’ll walk you through it during our furnace replacement visit before anything is approved. The number you sign off on is the number you pay.

A diagnostic visit runs $26 to $99. That fee gets credited toward the job if you move forward with us. If your budget is tight, financing is available on qualifying installations, subject to approved credit. You can read more about the full scope of our furnace replacement service before you decide.

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Furnace Size, Efficiency, and Access Are What Move Your Price

Three things affect a furnace job more than anything else: the size your house needs, how efficient it is, and how easy our team can get to your current setup. Get those three right in your head. Then the $3,800 to $8,000 range makes a lot more sense.

Size and capacity matter a lot. A furnace that’s too small runs constantly. It never quite keeps up. A unit that’s too big short-cycles and wears out faster than it should. We size a replacement to your actual home, not just a simple swap. A bigger, higher-capacity unit costs more in equipment alone.

Efficiency is the second big factor. AFUE ratings show how much of the gas you pay for turns into heat. A standard-efficiency furnace costs less upfront. But a high-efficiency, variable-speed unit costs more to buy. It runs quieter and can lower your winter gas bills over time. Brand and model play a role here too. A Trane furnace (with a longer warranty and better parts) sits at a different price point than an entry-level unit.

Access is what people often overlook until we’re standing in your attic. A furnace with a clear path in and out is a straightforward job. But one wedged into a tight attic in an older Sunnyvale or Mesquite-area home (with narrow framing and limited crawl space) takes our team longer. That time shows up on the invoice. The same goes for the condition of what’s already there. If your ductwork or wiring is old or undersized, connecting a new furnace sometimes calls for modifications. Those aren’t part of a standard install, by the way.

• Equipment size and capacity matched to your home’s heating load
• Efficiency rating, including AFUE and any variable-speed features
• Brand and model, including Trane equipment options
• How easy the furnace is to access (attic, closet, or garage)
• Condition of existing ductwork, wiring, and connections
• Code upgrades, permits, and any custom sheet metal fabrication

That last point is where a job can move outside the typical range. Code corrections, duct modifications, and permits aren’t part of a standard installation. If your home needs one of those, we’ll walk you through it before we add it to the number. That’s why we go over the actual scope with you before quoting a final price on our furnace replacement work. We don’t just quote off the phone.

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Here’s What’s Included in Our Quoted Price – and What’s Not

When we quote a furnace replacement, it covers the equipment, materials, and the labor to install it. This also includes standard connections to your existing ductwork and gas or electric lines. We’ll start it up, test it, and haul away your old unit. This is the job most homes need. It’s built into our typical $4,600 to $6,300 range for a like-for-like replacement. That uses the connections already in place.

• Included: the new furnace and materials to install it
• Included: professional installation using your existing connections
• Included: startup, testing, and haul-away of the old unit
• Excluded: duct, electrical, or plumbing modifications
• Excluded: code corrections found during the job
• Excluded: permit fees, unless we’ve already listed one in your quote

The excluded items aren’t extra charges we add to surprise you. They are work some homes need, and some don’t. A furnace from a 1980s Sunnyvale ranch home, for example, might have undersized ductwork for a new high-efficiency unit. Running it as-is would hurt the system’s performance. If our technician finds something like that during the visit, we’ll walk you through it. We will price it separately before touching anything, not after. That way, you know what to expect.

If you call us first for a no-heat issue, our $26 to $99 service-call fee gets credited toward the repair if you move forward with us. That fee is separate from a replacement quote. Once we’re talking replacement, you get one flat number in writing. It covers the categories above. We don’t start work until you’ve approved it.

Financing is available on qualifying installations for homeowners. Many people would rather spread out the cost of a full furnace replacement than pay it all at once (subject to approved credit). If you want to see how the numbers change, our furnace replacement page breaks down the sizing and efficiency factors. These factors move a job from the low end of the range to the high end.

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The Most Common Furnace Replacement Runs $4,600 to $6,300

Most furnace replacements we do fall between $4,600 and $6,300. This is for a standard like-for-like job. We swap an old furnace for a new one. We use your existing gas line, ductwork, and electrical connections. There are no major changes. Overall, furnace replacements across the Dallas-Fort Worth area run $3,800 to $8,000. It depends on your home and the equipment you choose. But the middle of that range is where most jobs settle.

A few things move the number up or down. The size and efficiency of your new unit makes a difference. A higher AFUE rating or a bigger tonnage costs more upfront. But it can lower your gas bill over the years. Brand and model play into it too. So does access. A furnace tucked in a tight attic in an older Sunnyvale ranch home takes longer to pull and reset than one in a garage closet in a newer subdivision. If your ductwork or wiring needs work to match the new unit, that adds cost. Also, if the job triggers a code upgrade, we’ll let you know. Any custom sheet metal fabrication does the same.

Here’s what’s in that $4,600 to $6,300 number: the equipment and materials, the installation labor, standard connections, startup and testing, and removal of your old furnace. Here’s what’s not in it: duct, electrical, or plumbing modifications, code corrections, and permits. We won’t fold a change in scope into the original number. If your attic ductwork is undersized for the new unit’s airflow, we’ll tell you before we start. We don’t wait until after.

If you’re not ready to replace yet, maybe you just need someone to look at your current furnace. The service call runs $26 to $99. If you move forward with the repair, that fee gets credited toward the work. We also offer financing on qualifying installations for homeowners. This lets you spread the cost out, subject to credit approval.

You can see how a full furnace replacement fits into your broader heating plans on our furnace replacement page. We walk through the process start to finish there.

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Financing Is Available for Qualifying Furnace Replacements

A new furnace is a big number. Usually, it’s $4,600 to $6,300 for a standard job. Sometimes it’s higher, depending on the system you pick. We offer flexible financing on qualifying installations and larger jobs. This is on approved credit. That way, you’re not stuck writing one big check the day your old furnace quits.

Financing works like most home purchases. You apply, a lender checks your credit, and if you’re approved, you get terms. These terms spread the cost out, instead of paying it all upfront. Not everyone qualifies for every plan. The rate you get depends on your credit, not on us. We can’t promise a specific term or payment before you apply. That part is between you and the lender.

What we can promise is that the price itself doesn’t move once you sign off. Before any work starts, you get a flat-rate quote in writing. That’s the number financing is based on. There’s no separate financing markup buried in the install cost. If you’d rather pay cash or write a check, that’s fine too. This is one option, not a requirement.

We usually walk through financing at the same visit where we give you the written quote for a furnace replacement. You can see the cash price and the financed price side by side before deciding anything. (It’s helpful to see both options up front.)

A few things tend to affect whether financing makes sense for a given household. If the furnace failure is sudden-a mid-winter no-heat call, for example-financing lets you get heat back on. It keeps you from draining savings meant for something else. If the job is planned ahead of time, some homeowners still prefer financing. They like to keep cash free for other projects. Either way, the decision is yours. There’s no penalty for asking about it and choosing not to use it.

We work across Sunnyvale and the surrounding DFW communities. We quote and finance furnace jobs the same way, whether you’re in an older slab-on-grade home near U.S. 80 or a newer subdivision further out. The equipment and labor cost don’t change based on financing. And neither does the workmanship warranty behind the install.