Central Air Installation Cost: By Home Size, Type and Efficiency (3 References)

Central air installation costs $5,800 to $14,400, or about $2.90 to $7.20 per square foot.³ Fixr’s national average is $8,750; Angi’s replacement average is $5,978; HomeGuide puts a standard-efficiency replacement at $5,000 to $8,300.¹²³ Prices below are national averages* for 2026.

*National averages, not local quotes. Your price depends on home size, efficiency rating, ductwork, and local labor rates. Central AC installation is licensed-pro work with permits.

$8,750

national average, Fixr

$5,978

average replacement, Angi

$5,000 – $8,300

standard replacement, HomeGuide

$2.90 – $7.20

per sq. ft., Fixr

Quick math: Fixr’s $2.90 to $7.20 per square foot on a 2,000 sq. ft. home reproduces its $5,800 to $14,400 band exactly, our arithmetic.³ Why is Fixr’s $8,750 average above Angi’s $5,978? Fixr’s average job includes new ductwork, which Angi prices separately at $3,000 to $7,500.¹³ For a straight change-out using existing ducts, $5,000 to $8,300 (HomeGuide) is the planning range; add ducts and the total roughly doubles.

Cost by system type

System type	Unit price	Installed cost	Source
Portable AC	$100 – $500	$80 – $700 install	Angi
Window AC	$150 – $800	$60 – $400 install	Angi
Central AC	$2,500 – $4,500	$3,500 – $7,000 install	Angi
Ductless mini-split	$2,000 – $3,000	$1,200 – $10,000 install	Angi
Geothermal	$4,200 – $12,000	$11,000 – $28,000 install	Angi

Central AC is the middle of the pack: cheaper than geothermal by a wide margin, pricier than room units, and competitive with multi-zone ductless once ducts already exist.¹

Cost by home size

Home size	Typical tonnage	Installed cost (HomeGuide)
1,000 sq. ft.	1.5 – 2	$4,500 – $7,000
1,500 sq. ft.	2.5 – 3	$6,000 – $8,500
2,000 sq. ft.	3.5 – 4.5	$7,000 – $11,500
2,500 sq. ft.	4.5 – 5	$8,500 – $13,500
3,000 sq. ft.	5+	$10,000 – $16,000+

The sizing rule behind the tonnage column: about 1 ton of cooling per 500 to 600 square feet (Angi), so a 2,000 sq. ft. home needs 3.3 to 4 tons, our arithmetic — matching HomeGuide’s 3.5 to 4.5-ton row.¹² Angi’s unit-only prices by tonnage run $1,300 to $4,000 (1.5 tons) up to $2,800 to $6,800 (5 tons).¹

Cost by efficiency tier

Efficiency level	Installed cost (2,000 sq. ft.)	Features
Entry-level	$5,000 – $8,300	Single-stage, standard efficiency
Mid-range	$8,300 – $12,500	Two-stage, better efficiency
High-end	$12,500 – $14,000+	Variable speed, maximum efficiency

Efficiency ratings changed in 2023: the SEER2 testing standard raised minimums, and Fixr attributes a 15 to 20% price rise on new systems to the transition.³ Fixr’s low-end project — a 14 SEER change-out using existing ducts — is $3,750; its high-end 21 SEER job with 300 feet of new ductwork hits $18,000.³

Labor, ductwork, and extras

Labor for a straight replacement runs $500 to $2,500 (Angi).¹ Ductwork is the swing item: modifications or new ducts add $3,000 to $7,500.¹ Smaller adds: a condensate drain line $180 to $500 (plumber), a dedicated 240-volt circuit $100 to $150 (electrician).¹ Location matters too — Angi’s city averages span $4,000 (Green Bay) to $7,900 (San Francisco).¹

Worked examples

Example 1 — change-out on existing ducts, 2,000 sq. ft. HomeGuide’s entry tier: $5,000 to $8,300.² Angi’s band: $3,887 to $8,073, average $5,978.¹ Plan on $5,000 to $8,000 for a standard-efficiency swap.

Example 2 — same job plus new ductwork. Take Angi’s $5,978 average and add ductwork at $3,000 to $7,500: $8,978 to $13,478, our arithmetic — right on Fixr’s $8,750 to $14,400 average-band for installs with ducts.¹³

Example 3 — big home, high efficiency. 3,000 sq. ft. at HomeGuide’s $10,000 to $16,000+, high-end tier pushing toward Fixr’s $18,000 high (21 SEER, new ducts).²³

FAQ

Replacement vs. new installation — what changes price most? Ductwork. Using existing ducts keeps a standard replacement at $5,000 to $8,300 (HomeGuide); adding ducts tacks on $3,000 to $7,500 (Angi).¹²

What size AC do I need? Roughly 1 ton per 500 to 600 square feet (Angi). Oversizing raises bills and humidity; your contractor should run a load calculation.¹

Central vs. ductless? With ducts in place, central is the value pick ($3,500 to $7,000 install, Angi). Without ducts, a ductless system avoids the $3,000 to $7,500 ductwork bill.¹

Why did AC prices jump recently? The 2023 SEER2 efficiency standard raised minimums; Fixr attributes a 15 to 20% rise in system prices to the transition.³

Is installation DIY? No — refrigerant handling, a dedicated 240-volt circuit, and permits require licensed pros (Angi).¹

Sources

Angi, How Much Does AC Replacement Cost? (2026 data).
HomeGuide, How Much Does AC Replacement Cost? (2026).
Fixr, How Much Does It Cost to Install Central Air Conditioning? (2025 data).