Combine Two Windows Into One Wide Window
Two narrow windows sit a foot apart on the same wall and neither one gives you the view.
Reply within one business day. Or call / text 763-250-3621.
To combine two windows into one wide window, JMB Builders removes both windows and the strip of wall between them, checks whether that wall carried load, and sets one wide unit in the new opening with a header sized for it. Turning two openings into one is a normal job for us, priced per opening plus the framing. Twin Cities metro. Send photos and we reply within one business day, or book a free in-home estimate.
- Two openings become one, priced per opening plus framing
- Load in the wall between checked before anything is cut
- One picture window, or a mulled pair as one unit
Two windows close together on one wall were usually a builder's way of lighting a room without buying a big window. Decades later they are two small views with a post in the middle, and the room would be better with one wide opening. Combining them is a framing job and a window job in one.
The strip of wall between the two windows is the whole question. If it is infill under a header that already spans both openings, it comes out and the one window goes in. If it carries the floor or roof above, a longer header has to replace it, sized by an engineer, with the load held while the swap is made. We find out at the measure by looking at what is above the wall and, where needed, opening a small patch of drywall.
The new window can be one picture window, a picture window with a casement on one side, or two matching openers mulled into one unit. Mixed styles in one unit is normal. It is ordered in a line that matches the windows you keep, which we check at the measure, so the wide window reads as part of the house and not as an addition.
Get a written quote for this job
Three photos and a sentence is enough: a reply within one business day, or ask for a free in-home estimate. Or text the photos to 763-250-3621.
What you supply
- A photo of the two windows from inside with the wall between them in the shot
- A photo from outside showing the siding between and around the two windows
- A photo of what is above the wall outside: a second floor, a roof edge, a gable
- A photo of a window you are keeping, for the match
- Paint or stain color for new trim: painting is quoted as a separate line, or leave it primed and caulked and paint it yourself
What JMB supplies
- A quote with the new window priced per opening and the framing, header and trim as their own lines
- One in-person measure with a check of what the wall between the windows carries
- Engineering for the header when the wall carries load, and the permit
- Removal of both windows and the wall between, temporary support while the header goes in
- One wide unit through our supplier, set in the new opening with sill pan, flashing, shims, foam and sealant
- Siding or stucco patched to the new opening, interior drywall patched, casing, stool and apron across the width
- Cleanup, haul-away of the old units and photos in your job folder
How it is priced: per opening
Quoted in writing from your photos, with a reply within one business day. What moves the number:
- Whether the wall between the two windows carries load and needs a new header
- Width of the finished opening and the size and weight of the unit that fills it
- One picture window vs. a mulled unit with openers
- Brand, series, frame material, glass package and grilles
- Siding, stucco or brick that has to be opened and patched between and around the windows
- Interior drywall, insulation and trim patched where the wall came out
- A second-story opening that needs a lift for a heavy unit
The photo of what is above the wall outside tells us the most about whether a header is needed, before anyone opens anything.
How long it takes
Lead time depends on the line and is written on the quote. Infill wall: one to two working days. A new header adds a day and the engineer's time before the order.
How your project works
- 1
Send photos, get a written quote
Send three photos of the space and a sentence about what you want. You get a clear, itemized reply within one business day. Prefer a look in person? A free in-home estimate is always an option.
- 2
Pick materials, or bring your own
We help you choose profiles and materials that fit the house and the budget, or match your existing millwork exactly — or you buy the door or trim yourself and we install it. Everything is confirmed before the crew is scheduled.
- 3
Clean, precise installation
The crew shows up on time, protects floors and furniture, and installs with tight joints and consistent reveals. Photos of the finished work go in your job folder.
- 4
Walkthrough and invoice
We walk the finished work with you. If anything is not right, we fix it before we call the job done. Then one invoice, paid by check or direct deposit — no card fees, no payment links.
Situations and options
One picture window
The widest clear view and the fewest frames. Best in a living room or dining room where other windows in the room already open for air.
Picture window with one casement
Fixed glass for most of the width with a casement at one end for air. The casement matches the openers elsewhere in the house.
Two openers mulled as one
Two casements or double-hungs joined into one unit, both opening. Keeps more air and a traditional look while still removing the wall between the old windows.
Combine Two Windows Into One Wide Window: questions, answered
Can two windows be combined into one big window?
Yes. The two windows and the wall between them come out and one wide unit goes in. If that wall carries load, a longer header goes in first, sized by an engineer. JMB Builders checks what the wall carries at the measure and quotes the job either way. Send photos and we reply within one business day, or book a free in-home estimate.
Is the wall between two windows load-bearing?
Sometimes. Two windows close together are often under one header already, with only infill between them. On an exterior wall carrying a floor or roof, the strip between may be part of the bearing. We look at what is above the wall from outside and, where needed, open a small patch of drywall at the measure to see the framing.
Do I need a permit to combine two windows into one?
Usually, yes, because the opening is being enlarged and the framing changes. JMB Builders checks with your city and pulls it. If a new header is needed, the engineer's sizing goes with the permit. It is listed on the quote.
Can the new wide window be part fixed and part opening?
Yes. Mixed styles in one unit is normal. A picture window with a casement on one or both ends, mulled as one unit, gives the view and the air. All parts come from one line in one frame color and glass.
How is combining two windows priced?
The new window is priced per opening, and the framing, header, siding patch and interior patch are their own lines. This site does not publish dollar figures. A wall that is only infill is a modest framing line; a new header with engineering is a bigger one, and the quote shows both.
Will one wide window match the rest of the house?
We check at the measure. The frame color, grille pattern and brand of the windows you keep are noted, and the wide unit is ordered in the closest current line. From outside the new opening is bigger, but the color and grille look tie it to the other windows.
Recent JMB work, from our job log
59 installs recorded across 30 Twin Cities communities since Dec 2025. Window and door installs for homeowners and the builders we work with. Counts come straight from our job log; no customer names.
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Read morePage reviewed October 25, 2026 · JMB Builders LLC, MN license BC809005 · All windows pages
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