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The stair opening could shape the whole upstairs plan
How early do you need to settle on a staircase location when laying out a second-story addition? A straight run seems like it could make the upstairs circulation simple, while a turning stair might fit into a tighter footprint, but the opening takes space from the floor below too.
I’m curious how people compare the usable area on both floors, including the space lost to the opening and the room needed to approach the stairs. How much do existing room layouts and headroom constraints narrow the options before furniture or bedroom sizes even enter the picture? Which parts are worth having a designer or building professional review before the upstairs plan gets too fixed?
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2 replies
A turning stair doesn’t necessarily save space overall. Compare the straight and turning layouts in both plan and section, showing the full run, landings, approach clearance on each floor, and required headroom. A turn may shorten the opening, but its landing can take more width and affect the usable room below. A designer can compare those footprints before the upstairs layout is fixed.
I’d settle the stair’s connection between floors early, before the upstairs rooms get drawn too tightly around a presumed opening. The existing floor framing and what supports it below can rule out an otherwise tidy-looking location, or mean the opening needs extra support. That could change which stair layouts are practical, so it’s worth having a designer or building professional assess the framing and load path before fixing bedroom sizes. Room layouts can stay flexible a bit longer; moving the stair later is the pricier game of Tetris.