How much does AC replacement cost in Longmont, CO?

Standard replacements typically run from $4,000 to $6,000, while larger high-efficiency systems range from $7,000 to $12,000. Price variables include equipment capacity, efficiency ratings, and existing duct conditions. We provide exact, flat-rate pricing before work begins and offer competitive financing to fit your budget.

Do you offer free estimates for new AC units?

No. A diagnostic fee applies to the initial in-home visit, allowing our technician to inspect your existing system, evaluate your home’s cooling requirements, and perform the calculations needed to recommend the right equipment. You’ll receive detailed replacement options and guaranteed flat-rate pricing before making a decision.

How long does an AC installation take?

Most standard AC replacement projects are completed in a single day. Installations that require electrical upgrades, custom ductwork, or additional permitting may take longer. Scheduling your replacement before peak summer demand can also help you secure faster availability.

Do I need a permit to replace my air conditioner in Longmont?

Yes. Most AC replacement projects in Longmont require a mechanical permit issued by the City of Longmont. If electrical upgrades are needed, a separate electrical permit may also apply. Mountain Valley coordinates the permitting and inspection process on your behalf so your installation complies with local requirements.

What is the difference between a high-efficiency AC and a cold-climate heat pump?

Both systems provide reliable cooling during the summer, but a cold-climate heat pump also delivers energy-efficient heating during colder months. Because heat pumps reduce reliance on fossil fuels, they may qualify for higher utility rebates and available federal tax incentives compared to traditional air conditioning systems.

Can you help me claim Efficiency Works, LPC, Xcel, and federal tax credits?

Yes. We help eligible homeowners understand the documentation required for local rebate and incentive programs, including AHRI-matched system requirements when applicable. Because rebate programs and tax incentives can change over time, we’ll explain the options available when preparing your estimate.

Reliable AC Replacement in Longmont, CO

Mountain Valley Plumbing, Heating and Cooling provides same-day appointments and upfront flat-rate pricing for new AC systems in Longmont, CO. Our licensed technicians recommend equipment based on your home’s size, cooling demands, and energy-efficiency goals to help you choose the right system. Every installation is backed by our Safe Clean Home Guarantee and the trust we’ve earned through more than 750 Google reviews.

Schedule Same-Day Plumbing or HVAC Service Or call Mountain Valley at (970) 317-2519

Why Longmont Homeowners Trust Mountain Valley

Family-Owned Since 2007:Family-owned and serving Front Range homeowners with trusted HVAC expertise since 2007.

4.9 Stars on Google: Backed by more than 750 verified Google reviews and a 4.9-star rating.

Same-Day Service: Same-day appointments available to restore your home’s comfort faster.

Background-Checked Crew: Drug-screened technicians who respect your home.

Safe Clean Home Guarantee: We fix any damage and cover a $100 dinner gift card.

Workers loading equipment into a van for transportation

Clear Pricing for Longmont AC Replacement

The cost of AC replacement in Longmont, CO depends on your home’s size, the equipment you choose, and whether electrical or ductwork upgrades are needed. Most standard systems fall between $4,000 and $6,000, while larger or high-efficiency installations may range from $7,000 to $12,000 or more.

Your final investment depends on several factors, including:

Cooling tonnage and manual load calculation results
SEER2 efficiency level and single-stage versus variable-speed operation
Condition of existing refrigerant lines, coils, and ductwork
Electrical upgrades, thermostat compatibility, and municipal permits

Mountain Valley provides flat-rate pricing quoted before work begins, protecting you from hourly surprises. Every system requires a physical assessment to confirm compatibility, so a service fee applies to the diagnostic visit. We also offer flexible financing options to make replacing your AC system more manageable.

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Deciding Between AC Repair and Replacement

Choosing between AC repair and replacement depends on your system’s age, repair history, energy efficiency, and the cost of restoring reliable performance. Our licensed technicians inspect your equipment and explain your options so you can make an informed decision based on your home’s needs and budget.

Consider replacing your system if you notice:

Frequent repairs and rising utility bills

Uneven temperatures between rooms

A major component failure on a system over 10 years old

Proper system sizing is one of the most important parts of AC replacement in Longmont, CO. Instead of selecting equipment based on your existing unit, we perform a Manual J load calculation that accounts for your home’s actual cooling needs, local climate, and altitude. We also inspect your ductwork to help the new system operate efficiently without short cycling.

If your air conditioner is newer and the issue is isolated, repairing the system may be the more cost-effective solution. Our technicians will evaluate its condition and recommend replacement only when it provides better long-term value. Learn more about our AC repair services or schedule a diagnostic visit to determine the best option for your home.

Understanding SEER2 and Longmont Cooling Incentives

When planning an AC replacement in Longmont, CO, choosing a higher-efficiency system can reduce monthly energy costs and improve indoor comfort. SEER2 is the current efficiency standard used to measure how air conditioning systems perform under real-world operating conditions. Depending on your home’s needs, you may choose between a high-efficiency central AC system or a cold-climate heat pump.

Eligible homeowners may qualify for rebates that help reduce the upfront cost of a new system. Mountain Valley assists with the documentation required for local incentive programs, including Efficiency Works and Longmont Power & Communications (LPC), when applicable.

Ducted Heat Pump Tier 1: Rebates of approximately $1,500
Tier 2 Cold-Climate Heat Pumps: Rebates of approximately $2,000
Geothermal Heat Pumps: Rebates up to approximately $3,000
Envelope Bundling: Up to $2,000 in additional savings

Most rebate programs require pre-approval and qualifying AHRI-certified equipment combinations. We install systems according to manufacturer specifications and help ensure the required documentation is available for eligible rebate applications. You can also learn more about our Longmont air conditioning upgrades and ask about current incentives during your estimate.

What to Expect During Your AC Replacement

Our licensed technicians arrive on time, wear protective boot covers, and use drop cloths to help keep your home clean throughout the installation. Before removing your old equipment, we confirm the new system is properly matched to your home’s cooling requirements and installation specifications. After installation, we test every component, verify system performance, and make sure your new AC is operating safely and efficiently before we leave.

Most AC replacement projects in Longmont require a mechanical permit from the City of Longmont. If electrical upgrades are needed, a licensed electrician completes that work under the appropriate permit. Our team coordinates the permitting and inspection process so you don’t have to manage the paperwork yourself.

We proudly serve homeowners throughout Longmont, including Old Town, Prospect New Town, Twin Peaks, Southmoor Park, and surrounding communities throughout the St. Vrain Valley.

Your home is protected by our Safe Clean Home Guarantee. If we accidentally cause water damage or physical damage during the installation, we’ll make it right and provide a $100 dinner gift card as part of our commitment to outstanding customer service.

Call Mountain Valley at (970) 317-2519

Longmont AC Replacement Frequently Asked Questions

How much does AC replacement cost in Longmont, CO?
Standard replacements typically run from $4,000 to $6,000, while larger high-efficiency systems range from $7,000 to $12,000. Price variables include equipment capacity, efficiency ratings, and existing duct conditions. We provide exact, flat-rate pricing before work begins and offer competitive financing to fit your budget.
Do you offer free estimates for new AC units?
No. A diagnostic fee applies to the initial in-home visit, allowing our technician to inspect your existing system, evaluate your home’s cooling requirements, and perform the calculations needed to recommend the right equipment. You’ll receive detailed replacement options and guaranteed flat-rate pricing before making a decision.
How long does an AC installation take?
Most standard AC replacement projects are completed in a single day. Installations that require electrical upgrades, custom ductwork, or additional permitting may take longer. Scheduling your replacement before peak summer demand can also help you secure faster availability.
Do I need a permit to replace my air conditioner in Longmont?
Yes. Most AC replacement projects in Longmont require a mechanical permit issued by the City of Longmont. If electrical upgrades are needed, a separate electrical permit may also apply. Mountain Valley coordinates the permitting and inspection process on your behalf so your installation complies with local requirements.
What is the difference between a high-efficiency AC and a cold-climate heat pump?
Both systems provide reliable cooling during the summer, but a cold-climate heat pump also delivers energy-efficient heating during colder months. Because heat pumps reduce reliance on fossil fuels, they may qualify for higher utility rebates and available federal tax incentives compared to traditional air conditioning systems.
Can you help me claim Efficiency Works, LPC, Xcel, and federal tax credits?
Yes. We help eligible homeowners understand the documentation required for local rebate and incentive programs, including AHRI-matched system requirements when applicable. Because rebate programs and tax incentives can change over time, we’ll explain the options available when preparing your estimate.

Schedule Your Longmont AC Replacement Now!

Mountain Valley has provided trusted plumbing and HVAC services across Northern Colorado since 2007, with headquarters based in Longmont.

You can book online in under two minutes or call our Longmont office and talk to a real person.

Schedule Same-Day Service call (970) 317-2519