Considering turning a window into a door? Here’s what to know!

If you think converting a window into a door is the right move, you can get started by looking closely at your space, thinking through your vision, and doing a bit of research. Here’s how to start planning and preparing:

1. Assess your chosen window 

First and foremost, take a close look at the space from both the exterior and interior. Understanding existing conditions can clue you into whether your project is going to be larger or smaller in scope. 

• What’s needed to make a smooth transition from inside to outside? Depending on the location of the window, you may need to add stairs, a patio, a deck, or some other type of landing to ensure a comfortable and aesthetically pleasing path from one living area to another.
• How big is the window? The size of the window will also impact the scope of the project. If you’re making a small window into a larger door, you will likely need a professional to help you enlarge the window opening and build new framing. If you’re turning a large window into a smaller door, you may wind up needing to patch up your home’s siding or exterior material.
• What’s happening on the interior? Are there electrical outlets or other utilities in the project zone? If you need to move electrical or plumbing, your project may be a bit more complex. Either way, a job of this scale will often require a permit. 

Bottom line: You don’t need to have all the answers as to how the project could be accomplished at this point. A pro will help with that. Instead, you want to focus on identifying aspects of the existing window that could expand the scope of the project. This gives you a chance to consider how big of a project you're willing to take on. It will also help you think through good questions to ask your pro.  

2. Consider your door options 

What type of door are you imagining? The answer to this question will give you more insight into the changes that might be required and the type of door that might fit your budget.  

• Replacing a window with a single-panel patio door: This might be the simplest solution for fitting into your existing rough opening. If you are trying to stay within your current rough opening, your door will need to be a bit smaller than your current window. We offer single-panel hinged patio doors through our 200 Series, 400 Series, A-Series, and E-Series product lines.
• Replacing a window with a French door: Turning a window into a French (hinged) patio door with two panels will allow you to open both for better flow of people and fresh air. Just consider whether there’s space for the doors to swing inward or outward — we offer both options through various product lines.
• Replacing a window with a sliding glass door: If your space is too small to accommodate a door that swings on hinges, a sliding (gliding) patio door will give you the benefit of two panels of glass for more natural light and save space by opening flush with the wall. Sliding patio doors are available through all our product lines.
• Replacing a window and more! If you’re considering more than just converting a window (or windows) but also removing a larger section of wall, you might have room for an oversized patio door. Folding Outswing Doors work well in a remodel because they run along a single track, so they don’t require extra-thick walls, and they can be customized to include the number of panels you desire. 

Bottom line: A successful conversion will likely include modifying your rough opening. A rough opening is the hole in the wall where a window or door fits. The door you select will dictate what kind of modifications will be required, but generally, the more dramatic the change, the more modifications will be needed. So, thinking about the door is an opportunity to decide how big the scope of your project should be. It’s also an opportunity to start considering the cost of the door. Broadly speaking, a larger door will come at a larger price.  

3. Measure your existing window  

Getting a rough idea about the size of your window can be helpful, especially if you are looking at a simpler conversion — like replacing a large window with a single-panel door. Measuring the window can help you begin comparison shopping. For example, our doors are sold at The Home Depot® stores as well as building supply dealers. You could visit either if you want to start understanding what a new door might cost. 

Bottom line: The measurement needed to actually order a door will be technical and could be complicated by the fact that your rough opening might need to be adjusted. This is yet another reason that we recommend working with a pro on a project like this. Still, taking a rough measure will help you start understanding door prices. 

4. Review permitting requirements for your area 

Depending on your city, county, or state, you may need to explore necessary permits or approvals before you begin your project. This process may affect the timing or total cost of your window-to-door transformation, so don't be afraid to ask for advice from your contractor or trusted professional if you have questions along the way. 

Bottom line: It’s always a good idea to ask your contractor how they usually approach the permitting process. A good contractor will have an understanding of local regulations, but it doesn’t hurt to confirm that they will take responsibility for pulling the necessary permits.