AC Installation Cost in Montgomery, Alabama
New AC installation in Montgomery runs about $7,000 for a typical job. Basic installs start near $4,100. High-efficiency equipment with duct or electrical work can reach $9,300.
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Montgomery Weather and HVAC Load
Montgomery logs 1,755 heating degree days and 2,846 cooling degree days in a normal year, based on the closest NOAA weather station. Cooling carries most of the load, which is why compressors and condenser fan motors wear out faster here than in northern cities. A normal year brings 40 nights at or below freezing and 92 days over 90°F. On the cooling side, a 2,000 sq ft house here usually needs around 3.5 tons. A tight, well-insulated house may get by with half a ton less.
| Heating degree days / year | 1,755 |
|---|---|
| Cooling degree days / year | 2,846 |
| Nights at or below 32°F | 40 |
| Days above 90°F | 92 |
| Average low / high | 57.1°F / 78.7°F |
Montgomery Housing Stock
Half the homes in Montgomery were built before 1977 (Census ACS median), so the typical house is about 49 years old. A lot of these homes are on their second or third system by now. The ductwork is usually original, and leaky joints are common. Owners live in 54.3% of occupied homes, roughly 44,000 households. Homes here have a median value of $148,500 and households a median income of $55,687. Those two numbers drive the labor adjustment in our estimate.
NOAA storm reports for Montgomery County show 12 hail days and 21 days with damaging thunderstorm winds over the six years from 2020 to 2025. The largest hail reported was 1.75 inches across. Hail flattens the thin aluminum fins on condenser coils and cuts airflow. After a big storm, take a look at the outdoor unit; homeowners insurance often covers the damage. Montgomery County also had 7 tornado days in that period.
When It Makes Sense
- Summer electric bills keep going up
- The AC is 12 to 15 years old or more
- The house can't reach the thermostat setting on hot afternoons
- It still runs on R-22 refrigerant
What Moves the Price
- Electrical work such as a new disconnect, breaker or wiring
- Whether the coil and line set also need replacing
- SEER2 rating and whether the compressor is single-stage or variable-speed
- Tonnage, based on house size and local climate
- The pad, permit and refrigerant (R-410A or the newer R-454B)
We kept the national figures close to unchanged for Montgomery using local income, home values and the equipment size this climate needs. Real bids can still come in outside the range, so collect three written quotes.
What the Quote Should Cover
- The new condenser, coil and, if needed, line set
- Startup, an airflow check and warranty registration
- The electrical disconnect and wiring
- Removing the old condenser and coil
- Refrigerant charge and a leak test
Alabama Permits, Efficiency Rules and Rebates
Alabama is in the DOE's Southeast region, where new split central air conditioners need at least 14.3 SEER2 (13.8 SEER2 for systems of 45,000 BTU/h and up). Plan on a mechanical permit for most replacements in Montgomery; the contractor normally pulls it. Before you sign, ask each bidder for their Alabama license or registration number and proof of insurance. The federal 25C tax credit ended for equipment installed after December 31, 2025, so incentives now come mostly from utilities and state programs. Check your electric and gas utility's rebate page before you pick equipment.
Before You Hire
- Ask for a Manual J calculation. "Same size as the old one" isn't sizing.
- Fall and early spring installs often come with better pricing and shorter waits.
- Buy the condenser and coil as a matched set, or you may void the manufacturer warranty.
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AC Installation Questions from Montgomery Homeowners
How much is new AC installation in Montgomery?
Plan on $4,100 to $9,300, with most jobs near $7,000. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule new AC installation in Montgomery?
Between late fall and early spring. With 92 days over 90°F, Montgomery contractors are booked solid all summer, and off-season jobs are easier to schedule and negotiate.
What size AC do I need?
It depends on square footage, insulation, windows and climate. The rough rule is a ton for every 450 to 650 sq ft, but only a Manual J calculation gives you a real number.
How long does a new AC last?
With yearly maintenance, 12 to 17 years. Salt air and extreme heat shorten that.
AC Installation Near Montgomery
- Birmingham $3,800 to $8,500
- Tuscaloosa $4,000 to $9,000
- Mobile $4,100 to $9,300
- Huntsville $4,300 to $9,700
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Montgomery; NOAA Storm Events Database 2020-2025, Montgomery County. Prices are our estimates, not contractor quotes. Updated 2026.