AC replacement
$7,050
Typical for a 1,500–2,500 sq ft home. Most jobs run $4,700–$10,550.
All of Missouri
Missouri
HVAC prices in St. Louis
$7,050
AC replacement typical, 1,500–2,500 sq ft
1973
Median home built Census ACS
Most AC replacement quotes here land between $4,700 and $10,550. Every figure is local: wages, prices, climate and permits for the St. Louis, MO-IL metro area.
The median home here was built in 1973; 61% heat with gas and 33% with electricity (Census ACS). Photo: Anthony Stewart on Pexels.
Check a quote hereThe numbers here
What HVAC costs in St. Louis, in four figures
Prices, wages and weather for this metro, against the other metros in the state.
HVAC technician wage
$30/hr
Median hourly pay here against $29.33 for the US (BLS OEWS). Labor is a third of a typical install.
Hot days a year
46≥90°F
1,552 cooling and 4,522 heating degree days in a normal year, 1991–2020 (NOAA).
HVAC companies
803
6.9 for every 10,000 homes (Census County Business Patterns). More competition tends to mean tighter quotes.
HVAC technician pay
Half the 2,980 HVAC techs in the St. Louis metro earn more than $30.29 an hour ($63,000 a year), 5% above the Missouri median. Shops here bill that hour at about $117 in our price model.
Source: BLS OEWS, May 2025; billable rate from the HVACFIND price model.
HVAC technician salary in St. Louis$30.29
Median hourly pay for HVAC technicians in St. Louis
Replace or install
New systems in St. Louis
Typical installed prices for a 1,500–2,500 sq ft home, with the range most quotes fall in.
- 3-ton home
- 1–2 days
- Permit
$4,700–$10,550 typical $7,050
- 3-ton home
- 1–2 days
- Permit
$6,950–$13,800 typical $9,800
- 3-ton home
- 1–2 days
- Permit
$3,700–$8,050 typical $5,450
- 3-ton home
- 1–2 days
- Permit
$8,600–$15,950 typical $11,700
- 3-ton home
- 1–2 days
- Permit
$4,100–$7,400 typical $5,500
Local factors
What moves the price in St. Louis
The same four facts on every place page, so two places read side by side compare the same rows.
Climate
Zone 4A
Heating degree days per year, 1991–2020 normals. More means a bigger heating load.
4,522
Freezing nights
Nights at 32°F or colder
A cold climate changes which heat pump you need.
95
Electricity
Union Electric Co - (MO)
Residential rate. It sets what an efficient system saves you each year.
12.6¢
Permit
Depends on the city
The contractor pulls it and books the inspection.
—
Repair and service
Repairs and tune-ups
Visit, diagnosis and the common repair, at local rates.
- Typical home
- Same day
- No permit
$330–$500 typical $410
- Typical home
- Same day
- No permit
$230–$580 typical $360
- Typical home
- Same day
- No permit
$340–$530 typical $430
- Typical home
- Same day
- No permit
$110–$250 typical $170
- Typical home
- Same day
- No permit
$370–$580 typical $460
Nearby
Missouri's other metros
Prices move with local wages, weather and permit fees. Press a metro for its own page.
46
Days a year at 90°F or hotter in St. Louis, on 1991–2020 normals.
$6,950Kansas City · 2,218,142 people
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