Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
A back door with a dog door solves one very specific daily problem: letting the dog out twenty times a day without you being the doorman. The trick is that a prehung exterior door with an integrated pet flap is a genuine carpentry purchase, not a gadget. If the swing direction is wrong or the rough opening does not match, you are rebuilding a frame in the rain. Both doors below are right-hand in-swing steel units from National Door Company, primed for paint, with the pet door already built into the slab.
I’m Mohammad Maruf — the founder and writer behind KitchPrep. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
Steel holds its shape around a pet door cut-out better than a hollow interior slab, which is why both picks here are steel. The two picks below differ in door width (34″ vs 32″), glass style (1/2 lite vs 9 lite), and rough opening size. This breakdown of the back door with dog door covers swing direction, sizing, and fit so you order the right one the first time.
Quick Picks
- National Door Company ZZ00692R Steel Primed — Best Overall
- National Door Company ZZ00762R Steel Primed — Best for Tight Openings
How To Choose The Best Back Door with Dog Door
An exterior door with an integrated pet flap is a permanent change to your house, so handing and rough opening matter more than finish or color. Get the handing and rough opening right and the install is a weekend job. Get either wrong and you are returning a 98-pound prehung unit.
Handing: the mistake that sends doors back
Handing — which side the hinges sit on — is the number one reason these doors get returned. National Door Company spells out the test plainly: stand on the inside of your home, and if your hinge pins are on your left, you have a Right Hand In-Swing. Both picks here are right hand in-swing, so check your existing door before ordering — a reversed swing means the whole frame has to come out.
In-swing means the door opens into the house. That matters for a pet flap because the flap swings with the door, and an in-swing keeps the pet door sheltered from wind and rain that would otherwise hit a door that opened outward.
Sizing: three numbers, one rough opening
National Door Company lists three separate figures on every door, and buyers who conflate them end up fighting the frame. Door size is the slab itself. Unit dimension is the slab plus its prehung frame, which is what actually arrives. Suggested rough opening is the hole in your wall the whole assembly drops into. Cut to the rough opening, not the door size.
Glass and material expectations
Both doors are steel, which resists dents and dings far better than a thin aluminum skin, and both arrive primed so you can paint them to match your trim. The glass in both is classic clear glass, double paned, tempered and insulated, with a privacy rating of 0 out of 10 — meaning people can see straight through it. If you want a door you cannot see through, neither of these is that door.
Neither door comes with locks. Both are bored for a 2-1/8″ entry and deadbolt prep with a 2-3/4″ backset, so a standard lockset drops in once you have painted.
Quick Comparison
| Model | Best For | Door Size | Suggested Rough Opening | Glass Style | Amazon |
|---|---|---|---|---|---|
| National Door Company ZZ00692R | Wider openings and a slimmer glass panel | 34″ x 80″ | 36″ x 82.25″ | 1/2 Lite, clear | Amazon |
| National Door Company ZZ00762R | Tight openings and a bigger glass panel | 32″ x 80″ | 34″ x 82.25″ | 9 Lite, clear | Amazon |
In‑Depth Reviews
1. National Door Company ZZ00692R Steel Primed, Right Hand In-swing, Prehung Front Door 1/2 Lite with Pet Door, 34″ x 80″
The wider 34″ slab that gives you more glass to work with and a roomier wall opening.
If your existing opening is on the wider side, the ZZ00692R is the one to measure against. Its door size is 34″ x 80″, the unit dimension including the prehung frame is 35.5″ x 81.75″, and the suggested rough opening is 36″ x 82.25″. Compare that to the 32″ ZZ00762R further down, which needs a 34″ x 82.25″ rough opening — the ZZ00692R is the larger of the two by the same margin the map lists on door size, unit dimension, and rough opening alike.
What makes this door easy to live with is the combination of the swing and the steel. The frame is primed finger-jointed, comes with three satin nickel hinges, and arrives bored for a 2-1/8″ entry and deadbolt with a 2-3/4″ backset, so your lockset drops in without you drilling anything. The glass is the 1/2 lite panel — a single band of clear, double-paned, tempered, insulated glazing with a privacy rating of 0 out of 10. The install reports are the part that sells it: owners describe putting the door in immediately after it landed and having dogs using the flap by that same evening. That lines up with the 4.3-star reception across roughly 25 ratings.
The honest note is that this is a working door, not a showroom door. One recurring comment calls the look industrial rather than residential, and since it arrives primed rather than finished, a coat of paint in a color that matches your exterior carries a lot of that weight. Measure three times before ordering, as the manufacturer’s own guidance stresses — on a door this size a wrong rough opening is not a small correction.
Where It Wins
- 34″ x 80″ slab with a 36″ x 82.25″ suggested rough opening — the more generous of the two picks if your frame is already wide
- Pet door arrives integrated, so no cutting into a finished slab
- Primed finger-jointed frame and three satin nickel hinges are already hung and ready
- Double-paned, tempered, insulated clear glass with a 0 out of 10 privacy rating — full daylight, zero hiding
- Bored for a 2-1/8″ entry and deadbolt with a 2-3/4″ backset, so locks are a drop-in job
Where It Asks More Of You
- Comes primed, not painted — plan for a finish coat before it weathers
- Locksets and deadbolts are sold separately
- Its look reads industrial to some eyes, and the clear glass offers no privacy
- Right hand in-swing only — confirm your hinge side before you order
Reach for this if: your rough opening measures out near 36″ x 82.25″ and you want the wider slab with a simpler single glass band.
Look elsewhere if: your wall is already sized for a narrower frame, or you want a door with more glass area — the 9 lite below fills that role.
2. National Door Company ZZ00762R Steel Primed, Right Hand in-Swing, Prehung Front Door, 9 Lite with Pet Door, Clear Glass, 32″ x 80″
Nine panes of glass and a Pet Safe flap, sized for the narrower opening most houses actually have.
Start with the flap itself, because that is what you are really buying. The built-in pet door on the ZZ00762R is a Pet Safe brand unit, and it ships with a removable cover. Owners of miniature pinschers and Jack Russells describe it as the right size for their dogs, though the flap runs smaller than some buyers picture when they order — worth holding a tape measure against your dog’s shoulder height before you commit.
The framing is where this door earns its reputation. What owners keep coming back to is the quality of the assembly, and the second theme is fit — the 5/5 mentions are overwhelmingly about how well the unit lines up, which makes sense given it arrives prehung. One owner used the supplied casing to set the door in place, and locking mechanisms align because the frame comes with the slab. At 98 pounds, most buyers can set it solo if they are comfortable, though the guidance is fair that a second pair of hands helps depending on your strength.
Here is the fit caveat that shows up in the data: the 32″ x 80″ label is the slab, and the actual unit measures 33.5″ x 81.75″ with a 34″ x 82.25″ suggested rough opening. One owner measured short and noted the door is not a true 32″ x 80 — if you are reusing the supplied casing you are fine, but if you only wanted the slab you will be swapping the frame too. There is a second mismatch worth flagging: an owner who ordered the wrong swing direction found the door easy to install but had to send it back, so confirm your handing first — hinge pins on the left inside the house means right hand in-swing.
Against the wider pick: the ZZ00762R is the smaller door of the two, with a 34″ x 82.25″ rough opening against the ZZ00692R’s 36″ x 82.25″, and its 32″ slab against the 34″ slab up top. If wall space is the constraint, that smaller footprint is the whole point. Its 9 lite glass also puts more visible panes in the door than the 1/2 lite above.
What that costs you: you give up some opening width for it, and the flap interior is snug enough that larger breeds will notice. Neither door offers privacy — the clear glass on both carries a 0 out of 10 rating.
The tight-frame answer: pick this one when your rough opening measures around 34″ x 82.25″ and you want the extra glass panes of a 9 lite door with a Pet Safe flap.
Where it stops fitting: if you need the full 34″ door and a larger opening, or you want a flap that suits a bigger dog, this one runs narrow by design.
Understanding the Specs
Door Handing: Right Hand In-Swing Explained
Handing describes which side the hinges sit on, and it is not something you can adjust later without pulling the whole frame. The test is simple: stand inside your home and look at the door. If the hinge pins are on your left, you need a Right Hand In-Swing door — which is what both picks here are. In-swing means the door pushes open into the room, keeping the pet flap shielded from direct weather on the outside face.
Door Size, Unit Dimension, and Rough Opening
These are three separate measurements and confusing them is the most common order error. Door size is the slab alone. Unit dimension is the slab plus its prehung frame — the size of the object that actually arrives on your porch. Suggested rough opening is the framed hole in your wall the whole unit slides into, and it is the one you cut to. On the 34″ door that is 36″ x 82.25″; on the 32″ door it is 34″ x 82.25″.
Steel Construction and Primed Finish
The material type on both doors is steel, which resists dents better than a light aluminum skin and holds its shape around a pet door cut-out. Both arrive primed rather than painted, so they ship ready for a top coat in whatever color matches your exterior trim. Because they arrive unfinished, the paint step is not optional — it is what protects the door outdoors.
Glass: Tempered, Double Paned, Insulated
The glazing on both doors is classic clear glass, double paned, tempered and insulated, with a privacy rating of 0 out of 10. Double paning gives you two sheets with a gap between them, tempered means the glass is heat-treated for safety, and insulated means the panel resists heat transfer better than a single pane. A 0 out of 10 privacy rating means the glass is fully see-through.
FAQ
How do I know if I need a right hand in-swing or left hand in-swing door?
What is the difference between door size, unit dimension, and suggested rough opening?
Does the pet door come already installed or do I cut it myself?
What size dog will fit through the built-in pet door?
Do these doors come with locks and deadbolts?
Can I see through the glass on these back doors?
How much does the prehung door unit weigh?
Do I need to paint the door after it arrives?
Can I reuse my old door frame instead of the prehung frame?
Are these doors suitable for commercial use?
Final Thoughts: The Verdict
For most people shopping for the back door with dog door, the National Door Company ZZ00692R is the one to order — it holds the higher rating of the pair and gives you the wider 34″ slab with a 36″ x 82.25″ rough opening, so there is more room to work with around the frame. If your wall measures nearer a 34″ x 82.25″ opening, reach for the National Door Company ZZ00762R instead: it runs narrower, packs a 9 lite glass panel, and uses a Pet Safe brand flap with a removable cover. Whichever you choose, both are steel, primed, right hand in-swing units with the pet door already built in — measure your opening and confirm your hinge side before you click buy.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of September 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
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