The walk-up, the tower behind it, and the wardrobe that has to travel.

Hell's Kitchen is the only stretch of Manhattan where the nineteenth century and the last fifteen years share a block face without transition. Walk the numbered streets between Ninth and Tenth and the wall is continuous five- and six-story brick — walk-up flats with fire escapes on the front and a rear yard behind, put up for dock and rail workers and never substantially redrawn. Turn the corner onto Eleventh, or look north toward the Fifty-Seventh Street shoreline, and the same neighborhood is glass and forty floors of it. The mid-block scale survived on purpose: the Special Clinton District, drawn in 1974, held height down through the preservation area while the avenues were left to grow. For anyone fitting out an apartment here, that history arrives as two entirely different problems wearing the same zip code.

In the walk-ups the problem is absence. Old-law tenements from before the 1901 code run their rooms in a line with no hall and light the middle room off an air shaft; the new-law buildings that followed gave a wider stair and a real window and still gave no storage, because the household of the period owned an armoire and a hook rail and that was the whole system. A century of settlement finishes the job. Party walls bow over their length, floors fall toward the street, wood lath sits under three coats of plaster and a good deal of paint, and no two door heads on a floor agree. We stand casework as furniture loading the floor rather than driving a load into plaster, and we scribe to base and cornice instead of cutting them. It is also the plain reason made-to-measure beats a configured system on these blocks: a wall that loses three-quarters of an inch over eight feet turns a run of stock panels into a row of tapering gaps, which is why we draw and mill every piece to the room rather than order it to a catalogue dimension. The prewar joinery problem is at its least romantic and most useful here.

The stair decides the drawing as much as the room does. A six-story walk-up with winders at every landing and a four-foot turn at the top will not accept a finished seven-foot wardrobe, so we survey the stair with the apartment and set panel sizes to the tightest turn, breaking the piece where the building requires it and joining on site so the seam lands in a shadow line rather than across a door face. Everything is designed in 3D and milled in our own Bronx workshop at 382 Canal Place in Mott Haven, then dry-fit on the bench before it ships — which is what keeps an install on a fifth floor down to days rather than weeks. The crew that measured the apartment is the crew that carries it up and sets it; we have never subcontracted a job, and we have worked this way since 2008. The cabinetry carries a twenty-five-year guarantee. Streets factor in too: these are hydrant-tight blocks feeding the Lincoln Tunnel approaches, and a truck that arrives at four in the afternoon has effectively not arrived, so deliveries get booked early and against the traffic rather than into it.

Then there is the theater, which shapes the brief more than the architecture does. This is the residential neighborhood of the Broadway houses, and a meaningful share of the households here work in them — performers, dancers, designers, musicians, stage crew — along with the pied-à-terre owners who keep a small apartment near the theater district and a real house somewhere else. Both keep wardrobes that behave unlike anyone else's: garment bags that must hang full length, a rack that turns over completely between contracts, shoes counted in pairs rather than in feet of shelf, hats and wigs and things that cannot be crushed. So the joinery gets drawn to that. Full-height hanging on one side instead of double rails everywhere, a ventilated section for what comes home damp after two shows, drawers deep enough for folded knits and shallow enough to see into, and a mirrored return with light at the correct temperature. In a studio or a small one-bedroom, a wall of reach-ins taken floor to ceiling — cabinet band above the doors for the off-season and the suitcase — replaces a closet that was three feet wide and thirty inches deep. That is the whole discipline of small-apartment optimization: the twenty inches above the door, the eight beside the chimney breast, the depth nobody counted.

The towers invert every one of those constraints. Along the western avenues and up toward the Fifty-Ninth Street end the apartments are drywall on studs, square to within a hair, with ceilings at nine feet or better and rooms that were laid out by a computer. Nothing here is out of plumb, and the joinery does not have to fight the building. What it has to fight is the fit-out, which in even a well-finished condo usually means a wire shelf and a rod at five feet with three or four feet of dead air above it, plus a glass line that eats the wall a bedroom would otherwise have. The work is to take the millwork up to the slab, put doors where the swing allows, and treat the corner column and the bulkhead as things to build into rather than around. Where two lines have been combined, or where a plan hands over an interior room with no window, that room becomes a dressing room with an island — a windowless room is a liability as a bedroom and an asset as a wardrobe. Buildings on this side of the neighborhood run alteration agreements, certificates of insurance and a service elevator you book by the hour, all of which favor a short, scheduled install over an open-ended one.

Budgets follow the apartment rather than the address, and the spread is as wide as the housing stock. A rebuilt bedroom reach-in in a walk-up starts around $3,500; a full wall of wardrobe with a cabinet band above runs several times that; a dressing room in a combined tower line reaches into the tens of thousands, and we publish how the pricing works instead of making you ask for it. For the towers proper, the guide to Hudson Yards and the west-side high-rises goes further into glass-wall plans, and the borough page for Manhattan collects the neighboring ground. The first conversation is sixty minutes, at the apartment or at the workshop: $350 flat, credited to your project. Bring the floor plan if you have one — and tell us which floor, and whether there is an elevator.