Cost to Add a Window to a Bathroom
Adding a window to a bathroom means cutting an opening in an exterior wall, framing it with 2-by-4 lumber and a header, installing the window, and sealing it with caulk. It is a hard project because the opening affects wall structure, must be located around studs, and needs careful leveling and moisture sealing.
- Dimensional lumber33 linear foot @ $3$82
- Double-hung window unit1.1 each @ $450$495
- Supplies subtotal$419–$812
- Labor$660–$1,210
- Permits & fees$250
Based on 1 window (typical size). Figures are ballparks — get a contractor quote to confirm.
Common reasons homeowners do this job
- A bathroom remodel includes an upgrade to add a window.
- A desired bathroom layout includes a new window location.
- An existing bathroom window is worn or damaged, and the project is planned as an upgrade.
- A homeowner wants to choose a window type suited to a bathroom environment.
DIY or call a pro?
A licensed professional is required because creating the opening and adding the header are structural modifications. Cutting into an exterior wall can involve structural elements and potential electrical wiring hazards. Working at height may also be necessary, depending on the bathroom location.
Frequently asked questions
- Can I add a bathroom window myself, or should I hire someone?
- Hire a licensed professional for this work. The wall opening and header are structural modifications, and cutting into the exterior wall can expose potential electrical wiring hazards. A professional can also handle work at height when the bathroom location requires it.
- What makes the price of a new bathroom window installation go up?
- The price scales with the size of the job and the number of windows, along with labor time and materials. Haul-away or disposal of old material and a minimum or trip charge for a small job can also affect the total.
- What should be checked before choosing a bathroom window?
- First measure the desired location and use a stud sensor to locate wall studs before marking the layout. The window type should also be appropriate for a bathroom environment.
- Why do the header, level, and caulk matter when adding the window?
- The header supports the wall structure around the new opening. Leveling helps the window fit properly, while caulk seals the window to help prevent moisture intrusion.
Have a different situation?
Every home is different. Describe yours to Gable Pro and get a diagnosis, a real cost estimate, and — if you want — a match to a vetted local pro.