Hold a level against the hinge jamb before you price anything. That one reading decides most of what follows — whether you are buying doors, or doors plus jambs plus casing plus a patched and repainted wall on both faces of every opening.
Reusing a jamb is the cheaper job on paper. A slab costs less than a prehung unit, and hanging one in an opening that already works is fast and leaves the trim alone. The catch is that openings move with the house, and a jamb that has gone out of plumb cannot be corrected by the door hanging in it.
Slab or prehung: what you are actually buying
A slab is the door leaf on its own. Nothing else. It hangs on the jamb you already have, on hinges set into mortises somebody else cut, latching into a strike somebody else located. To work it has to match that jamb in width, height, thickness and swing, and match the hardware in hinge size, hinge corner — square or radiused — bore position and bore diameter.
A prehung is the leaf already hung in a new jamb, hinges mortised and stop applied at the factory, arriving as one unit. It goes into the rough opening, not the finished one. So the casing comes off both faces of the wall, the drywall gets patched where the casing sat, and the opening gets primed and painted again. The unit costs more than a slab. The work around the unit costs more than the unit.
That is the fork, and it is not a matter of taste. The opening decides.
The check that decides it
Do this at every opening before you shop, and write the answers down.
- Plumb. Level against the face of the hinge jamb, then against its edge. Out of plumb in the face plane is what makes a door swing itself open or drift shut on its own.
- Straight. Sight down the hinge jamb. A bow puts a taper in the reveal that nothing downstream removes.
- The reveal on the door you have. Even along the head and down the latch side, or wandering.
- The latch. Does it catch on its own, or does the door need a push, a lift or a shoulder.
- Wind. Close the door and look at where it meets the stop, top and bottom. Touching at one end and gapping at the other means the jamb is twisted, and a new leaf inherits the twist.
- Condition. Kick damage, a split hinge leg, a jamb foot that has stood in water at a laundry or a basement floor line.
- Depth. The jamb has to be the thickness of the wall. Plaster and lath is not drywall over stud, and a wall that was furred out is neither.
An opening that passes all of that takes a slab. No casing off, no patching, no repaint of a wall that was fine — the cheapest honest answer in this whole post.
What a slab still needs
Matching a slab is not hanging a picture. Hinge positions get transferred from the old leaf, which is the template, and the mortises get cut to depth so the door sits at the right reveal instead of being packed out behind a hinge. The latch edge gets a bevel so the leading corner clears the stop rather than scraping past it. A hollow-core leaf only has so much rail to give before a cut opens into honeycomb.
Then it is finished on every face and every edge, top and bottom included, before it is hung. A raw top edge in a bathroom drinks vapor all winter.
When a prehung is the honest answer
- The hinge jamb is out of plumb, bowed or in wind.
- The jamb depth is wrong for the wall.
- The swing is changing. Mortises are cut in one leg and the stop applied for one direction — reversing a swing means a new jamb, always.
- The opening is being widened, narrowed or moved.
- The jamb is damaged or rotten at the foot.
- The casing is being replaced anyway, so the patch and repaint are already in the scope and the reason to save the old jamb disappears.
Swing, handing and what the door does to the room
Handing gets ordered wrong constantly, and a wrong-handed prehung is a restock, not an adjustment. The convention: stand on the side the door swings away from you. Hinges on your left is a left-hand door.
Which way it swings is a layout decision, not a hardware detail. A door that lands against the vanity drawers, or that has to be shut before anyone can get past the toilet, is a plan problem — solved on paper, alongside everything else a small bathroom decides without moving the plumbing.
In a kitchen it is measurable. NKBA guidance is a clear work aisle of 42 inches for one cook and 48 inches where two people work in the same aisle or where anyone passes behind someone working, measured with doors open — a pantry door and a basement door each take a bite out of the aisle while doing their job. Those are design guidelines rather than Indiana code, but they are what a kitchen gets judged against, and they belong in the conversation about where the work zones land.
The rest are the dull questions nobody asks until the door is hung. Does it cover the light switch. Does it hit the door opposite it in the hall. Does it stand across the path to the window in a basement bedroom.
The alternatives to a swinging door
A pocket door buys back the arc of floor and costs you the wall: the cavity has to be clear of plumbing, wiring and duct, and it seals badly. A barn-style slider seals worse and takes no privacy latch. Fine for a pantry, wrong for a bath. Sometimes the honest answer is no door at all — a cased opening, which is its own exercise in jamb, extension and reveal.
Hollow core, solid core, and what the difference buys
A hollow-core door is stiles and rails around a honeycomb fill. Light, cheap, easy on a tired jamb, and it passes sound the way an empty box does. A solid-core door is an engineered core in the same skins: heavier, quiet, and it lands with a sound people read as quality without knowing why. The weight has consequences — more hinge, screws long enough to reach the trimmer stud behind the jamb, and a jamb fastened properly rather than nailed through shims and hoped for.
Solid wood, stile and rail, moves with the season — tight in a humid August, gapped in February after the furnace has been drying the house since November. That is wood behaving normally here, not a defect. Molded MDF panel doors take paint flatter than anything else and swell permanently at the bottom edge if they stand in water, so keep them off a basement floor line.
Spend on sound where sound is worth something: the primary bedroom, a bath sharing a wall with living space, any downstairs room meant for work. In a basement office or theatre the door is usually the weakest part of the assembly. Closets can stay hollow. And no door is quieter than its gaps — a solid-core leaf with a tall undercut still leaks conversation underneath itself.
Setting a jamb so the door stays where you put it
The hinge leg goes in first, plumb in both planes, shimmed at every hinge and screwed through the shims into the trimmer. On a heavy door one screw at each hinge runs long, into framing rather than jamb. Then the head, then the strike leg, set off the closed leaf rather than off a tape so the reveal follows the door. Crank the shims and the jamb bows, which puts back the taper you were trying to fix.
Height is the other one. The jamb gets set for the finished floor whether that floor exists yet or not, blocked up to it if the flooring comes later. Carpet with pad under it needs a different undercut from tile, which is part of choosing flooring room by room. And a floor that was never flattened shows up as a door that rubs at one end of its swing and gaps at the other — a subfloor problem wearing a door's clothes.
Hardware, and the part people buy twice
Function first. Passage sets have no lock and belong on halls and closets. Privacy sets have a thumb turn and an emergency release, and belong on bedrooms and bathrooms. Then fit. There is more than one standard backset, and a pre-bored door is bored for one of them, so a set ordered against the wrong one sits with its latch short of the strike. The faceplate has to match the mortise already cut in the door edge, square or radiused, or somebody is chiseling. When a latch does not catch, the strike gets adjusted — never the door. Shaving a leaf to chase a latch is how a good door gets ruined.
Levers are easier with full hands or stiff hands, and they are the sensible choice if anyone plans to stay in the house a long time. Either way every door needs a stop, at the baseboard, on the hinge pin or in the floor, because the alternative is a knob-shaped hole in the drywall. Buy the hardware for the whole house at once — finishes drift between batches and between brands — and fit it after paint, not before.
Where the house decides instead of you
The door between an attached garage and the house is governed, not chosen. What the assembly has to be, and whether it has to close itself, come from the code cycle your jurisdiction enforces — confirm it with the building department, not a product page.
Downstairs, a door does not make a bedroom. The window does. Indiana Residential Code R310 asks for an emergency escape and rescue opening with a minimum net clear opening of 5.7 square feet, and net clear opening means the actual hole when the window is fully open, not the frame or the glass. Confirm it locally, then read the numbers the code actually asks for and what else makes a basement bedroom count. Swapping doors into existing openings is finish carpentry; cutting a new opening is structural, and structural change is the trigger for a permit in Fishers.
In the older stock around Fishers, Noblesville and Carmel we find openings no supplier stocks a door for, jambs deeper than any prehung on a shelf, and mortise locks that take no modern cylindrical bore. We also find that the door sticking in August is not a jamb problem at all — it is decades of paint on the edges. Half a house of original doors and half of new ones reads as a mistake from the hall, so match them, or change them all at a deliberate line: a landing, a stair, a wing. That fork belongs on the estimate, like most of what an older house here turns up.
Where doors hide in a quote
Doors rarely appear as one number. They sit inside finish carpentry, priced per opening, which is the kind of line that hides a large difference between two quotes. What moves it: the count of openings, slab against prehung, hollow against solid, whether casing and patching come with it, and hardware — trivial per door, not trivial across a house.
For scale on the project that carries the most new doors at once, published Indianapolis basement-finishing research including Angi puts a finished basement at roughly $25 to $65 per square foot — about $25,000 to $65,000 for a 1,000 square foot basement. Doors and hardware are a small share of a number like that and a large share of how the finished room feels.
Ask for it per opening, and ask which openings are getting new jambs. That is the same discipline as reading an estimate line by line: the cost is not hidden, it is unwritten.
What to remember
Take a level to every hinge jamb before you decide anything. The jambs that pass take slabs, and that is the cheapest good outcome available. The jambs that fail take prehung units, and the patching and painting around them is the real cost, not the door. Note the swing at every opening, decide where quiet is worth paying for, and buy the hardware once, in one finish.
Doors and their trim are the last stage of a finished basement, and the point where new work either joins the house or announces itself — the same reason trim and doors carry through to the next room on a kitchen rather than stopping at the doorway. If you want someone to walk your openings and say which ones actually need new jambs, ask for an estimate and we will go opening by opening with you.
