Back Door Only
The back door is the one that gets used, kicked, and left in the weather.
Reply within one business day. Or call / text 763-250-3621.
Back door only replacement is one prehung door, frame included, and nothing else. JMB Builders supplies a steel or fiberglass door, pulls the old door and frame, repairs sill rot, sets the new unit on a sill pan and trims it. Plain back doors are often in stock; glass or color is custom ordered, lead time on the quote. Twin Cities metro, priced per door. Photo reply within one business day, or a free in-home estimate.
- Just the back door; one door is a welcome job
- Priced per door, prehung frame included
- Plain back doors often in stock; lead time on the quote
The back door usually goes before the front door. It sits closer to the ground, faces the yard or deck where snow piles, has no porch roof over it, and takes the dog, the groceries and the kids. When it is soft at the bottom, drafty or will not latch, the fix is the whole prehung unit, not a new slab in the old frame. The frame and sill are where the water did its work.
A back door is also the door most often in stock. A six-panel steel door, a nine-lite or a half-lite in a common size and white is a shelf item at our supplier, so one back door can often be measured, picked up and installed without a factory order. If you want blinds between the glass, a color, a full-lite or an odd size, it is custom ordered and the lead time is written on the quote.
The install is the old door and frame out, rot at the sill and subfloor cut out and replaced, a sill pan and flashing in, the new unit set plumb and square, and brickmould and casing on. If the door opens onto a deck, the threshold is set so meltwater drains away from it. New trim goes in primed and caulked; painting is quoted as a separate line, or paint it yourself.
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
- Photos of the back door from inside and outside, with a close-up of the sill and the floor inside the door
- A photo of what is outside the door: deck, stoop, patio or grade
- Your pick: in-stock six-panel, nine-lite or half-lite in white, or a custom glass, color or size
- Your choice of lockset and deadbolt finish, or your own hardware
What JMB supplies
- A measure of the opening, swing and jamb depth before the order
- The prehung back door with frame, in stock or custom ordered through ABC Supply
- Removal of the old door, frame and trim with haul-away
- Repair of rotted sill framing, jamb feet or subfloor, quoted as its own line
- Sill pan, flashing tape, foam, sealant and shims, with the threshold set to drain toward the deck or stoop
- Exterior brickmould and interior casing, primed and caulked
- Lockset and deadbolt installed, strike and weatherstrip adjusted
- Painting quoted as a separate line, or leave it primed and caulked and paint it yourself
- Photos of the finished door in your job folder
How it is priced: per door
Quoted in writing from your photos, with a reply within one business day. What moves the number:
- In-stock steel in white vs. custom ordered fiberglass, glass, blinds between the glass or color
- Rot at the sill, jamb feet and subfloor, which back doors have more often than front doors
- What the door opens onto: a deck, a stoop or grade, and how the threshold meets it
- Siding, stucco or brick around the opening
- Interior casing kept, matched or replaced
- Hardware: a basic lockset vs. a handleset or smart lock
- A storm door or pet door added, quoted as its own line
A close-up of the floor just inside the back door tells us about the subfloor. Send it with the door photos.
How long it takes
About a day on site for one back door, more if the subfloor is rotted. A plain in-stock door is picked up for the install; a custom ordered door has its lead time written on the quote.
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
In stock: steel six-panel or nine-lite
The standard back door, on the shelf at our supplier in common sizes and white. Primed for your paint, with a basic lockset or your own hardware.
Half-lite with blinds between the glass
Light into a kitchen or mudroom with the blinds sealed inside the glass. Custom ordered with the lead time on the quote.
Fiberglass for a door in the weather
A smooth fiberglass door does not rust at the bottom or dent. Common sizes in white are sometimes in stock; colors and wood grain are custom ordered.
Back Door Only: questions, answered
Can you replace just the back door?
Yes. One back door is a welcome job for JMB Builders, priced per door with the prehung frame included. The front door, garage door and patio door are not touched unless you ask. Send photos and we reply within one business day, or book a free in-home estimate.
Is a back door usually in stock?
Often. A six-panel steel door, a nine-lite or a half-lite in a common size and white is a shelf item at our supplier, so it can be picked up once the measure is done. Blinds between the glass, a color, a full-lite or an odd size is custom ordered with the lead time written on the quote.
Does the price include the frame?
Yes. The back door comes as a prehung unit with the frame, sill and weatherstrip, and that is one line on the quote. Rot repair, trim and hardware are their own lines.
What if the floor inside my back door is soft?
The subfloor and any soft framing under the threshold are cut out and replaced before the new door is set. That is common at back doors, and it is quoted as its own line from your close-up photo of the floor, with photos of what we find once the old door is out.
Steel or fiberglass for a back door?
Steel is the common in-stock choice and holds up fine under a roof or on a stoop. Fiberglass costs more, does not rust or dent, and suits a back door that takes the weather with no overhang. Both come prehung with the frame.
Can the new back door open onto my deck without water getting in?
Yes. The threshold is set above the deck boards so meltwater drains away, and the sill pan and flashing lap over the ledger behind the deck. If the deck is tight to the old threshold, we tell you at the measure what has to change.
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.
Related jobs we do
Replace Just One Exterior Door
One door is drafty, soft at the bottom or will not latch, and every other door in the house is fine. Replace that one and leave the rest alone.
Read moreNine-Lite Back Door Replacement
The back door to the deck or the garage is dark and tired. A nine-lite puts a grid of glass up top, lets you see who is there, and keeps a solid panel below.
Read moreHalf-Lite Back Door Replacement
You want light in the kitchen and a look at the deck, but not a wall of glass at the back door. The half-lite is the middle ground, and it can come with blinds sealed inside.
Read moreBack Door Replacement — Rear, Side and Kitchen Doors to the Yard
The back door gets used more than the front, sits under a deck or at a stoop, and usually wears out first. We replace it with one that fits how you use it.
Read moreDeck Door Replacement — Threshold to the Decking, Flashed to Ledger
The door onto the deck is where the house and the deck meet, and that joint is where water gets in. The new door is set so the deck boards, the threshold and the ledger flashing work together.
Read moreRotted Door Jamb Bottom — Exterior Door Frame Rot Repair
The paint at the bottom of the door frame is bubbling, a screwdriver sinks into the wood, and the weatherstrip has nothing to hold it. The jamb leg is rotted at the bottom. We splice it, not the whole door.
Read morePage reviewed October 25, 2026 · JMB Builders LLC, MN license BC809005 · All doors pages
Where we work
Door Replacement & Installation near you
Based in Zimmerman, scheduling across the Twin Cities metro. Closest first: