Basic
$250 – $917 each
Standard-efficiency window unit sized to the room, rotary knob controls, mounting kit, side curtains and foam sealing

Supply and install one window air conditioner (5,000-18,000 BTU), including mounting kit, sealing and setup; no new circuit.
Window Air Conditioner in Portland, Maine typically costs $294 to $1,079 each as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Prices in Portland are 1.0% lower than the national average for window air conditioner.
National average: $300 – $1,100 each
$250 – $917 each
Standard-efficiency window unit sized to the room, rotary knob controls, mounting kit, side curtains and foam sealing
$294 – $1,079 each
Energy-rated window unit sized to the room, digital thermostat with remote and timer, support bracket and foam sealing
$368 – $1,348 each
Inverter window unit sized to the room with low-noise operation and app control, support bracket, insulated side panels
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $131 – $480 | each |
| Labor | labor | $105 – $385 | each |
| Supplies & Other | supplies | $35 – $128 | each |
| Equipment & Disposal | equipment | $23 – $85 | each |

White window air conditioner installed in a double-hung window with white trim
Photo: No machine-readable author provided. Stilfehler assumed (based on copyright claims). · Public domain · Source

Window air conditioner in a window beside curtains inside a room
Connect with local window air conditioner contractors in Portland for personalized quotes based on your specific project.