Quick answer
How wide is a narrow interior door?
28 inches — Narrow interior doors are 28 inches wide and 80 inches tall. Commonly found in closets, bathrooms, and older homes.
Source: IRC 2021 Section R311.2
Measurements
Dimensions.
Fit matrix
What fits through a 28" door?
Measure smart
What to measure.
Four numbers decide nearly every fit check. Get these right and the rest follows.
- 01Width, depth, and height of the item at its widest points, including feet, arms, handles, and headboards.
- 02The clear opening of the space, not the frame. A 36-inch door gives roughly 32 inches once the door and stops are accounted for.
- 03The item's smallest dimension. It decides whether tilting or turning it on its side gets it through.
- 04Diagonal clearance at turns, landings, and corners, where the real bottleneck usually is.
Don't make these
Common mistakes.
Most “it didn't fit” stories trace back to one of these oversights.
- ⚠Measuring the door frame instead of the clear opening, then losing two inches you assumed you had.
- ⚠Forgetting that feet, arms, and handles add to the nominal size printed on the box.
- ⚠Treating a soft mattress and a rigid frame the same. One compresses, the other does not.
- ⚠Planning the doorway but ignoring the turn at the top of the stairs.
Go deeper
Related items and calculators.
Frequently asked
Questions we keep getting.
What furniture fits through a 28-inch narrow door?
Through a 28" door you can typically fit: nightstands, small dressers, folding chairs, twin mattresses (on edge), and items with a smallest dimension under 26 inches. Larger items like sofas and queen beds typically won't fit.
01Why do some homes have 28-inch doors?
Narrow 28" doors were standard in homes built before the 1970s and are still used for closets and utility rooms. Modern building codes require at least 32" for bedroom and egress doors.
02How can I move furniture through a 28-inch door?
Remove the door and trim for an extra 1.5-2 inches. Disassemble furniture when possible. For couches, try standing them on end. If a piece truly won't fit, consider window removal or a different entry point.
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