Window AC Unit Installation Cost Guide
Last Updated: December 15, 2023
Fact Checked By: Ryan Maguire
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Window air conditioners aren't the most efficient way to cool an entire home, but if you're looking to provide heat relief to one or two rooms, this type of unit is very effective (which is why it is also known as a room air conditioner).
How Much Does It Cost to Install a Window AC Unit? #
Having a window air conditioner professionally installed typically costs $150 to $450. However, most homeowners find DIY AC unit installation to be an easy process and hire HVAC pros only if complex wiring, unusual windows or other obstacles necessitate it.
Professional Installation Costs
- Basic, accessible unit: $150 - $250
- Larger unit or tricky windows: $300 - $450
DIY AC Unit Install
- Purchase foam insulation seals: $10 - $20
- Pick up bracket or frame: $30 - $80
Window Prep, Wiring, Permits
- Permit fees: $40 - $200
- Any electrical work: $45 - $100 per hour
- Window modification: $100 - $500
You should plan to spend $30 to $100 per AC unit if installing them yourself, or $150 to $450+ if you hire an HVAC pro or electrician for complex installs, tricky access or wiring challenges. Get free cost estimates from local services.
Real-World Window AC Installation Costs #
Here are some real-world quotes from homeowners on how much they paid to have window AC units installed:
"The HVAC company charged $225 to install my new 8,000 BTU LG window unit that I purchased for $349." - James T., Ohio
"I hired a handyman service for $185 to install a basic 5,000 BTU Friedrich I got on sale for $159." - Anne B., Texas
"The installer charged $275 for two windows that needed modification to fit my 12,000 BTU GE ACs that cost $499 each." - Kevin R., Pennsylvania
"I have large heavy sliding windows on my upstairs. Paid an HVAC tech $425 to install my new 10,000 BTU Frigidaire unit." - Olivia S., Maryland
"Got a small 5,000 BTU unit for my bedroom. I installed it myself easily for $0, it was $140 at the home improvement store." - Noah P., Arizona
"Had an electrician install a new outlet and wiring for $95. I mounted the 8000 BTU Toshiba myself that was $270." - Emma C., Nevada
As you see, basic window AC unit installation ranges from $0 for simple DIY to $425 for complex jobs needing window modifications. Self-installed units start under $150. Professional installs run $185 to $250 on average.
How Do I Choose the Right Size Window AC Unit? #
Selecting an adequately sized window air conditioner ensures it can cool your room efficiently without overworking or burning out prematurely.
The key factors in choosing capacity are:
Room Dimensions - Measure length x width x height. Room volume determines needed BTUs.
Window Location & Size - Rules out units too small or large for your window openings.
Occupants - More people means a larger room capacity AC is needed.
Direct Sunlight - South and west sun exposure means a bigger AC unit.
Home Efficiency - Well insulated homes don't need as large an AC to cool.
As a general room AC size guide based on room volume:
| Room Size | AC Unit BTU Size | Approximate Cost |
|---|---|---|
| 100 - 300 sq ft | 5,000 - 6,500 BTUs | $120 - $350 |
| 325 - 400 sq ft | 7,000 - 8,500 BTUs | $250 - $500 |
| 425 - 700 sq ft | 10,000 - 12,500 BTUs | $300 - $800 |
| 750+ sq ft | Multi-room/mini-split AC | $500 - $1,500 per unit |
Use an AC unit calculator for a personalized recommendation. Leave some capacity buffer if budget allows.