Murphy Bunk
Beds

How a murphy bunk bed works

A murphy bunk stacks two bed frames on a single pivot mechanism. Pull the handle and both bunks swing down together, one above the other, with about 30 to 36 inches of clearance between them. The ladder hooks onto the front rail. Fold it back up and the whole thing disappears into a cabinet roughly the size of a wardrobe.

The mechanism is a standard murphy pivot scaled up: heavier pistons or springs, a wider pivot axle, and a locking leg that carries the front load. Both bunks share one set of side rails, which is why the cabinet is narrower than you'd expect. The top bunk gets a guardrail that folds flat against the frame when you close it.

Who it's actually for

Kids' rooms, vacation rentals, lake houses, and grandparents' spare rooms. Anywhere you need to sleep two (or three, with a trundle) in the floor space of one twin. If your kids share a room now but you want the floor back when they're older, a murphy bunk beats a fixed bunk you have to disassemble and sell.

Be honest about who sleeps up top. Most mechanisms and frames are rated around 200 pounds per bunk. Fine for kids and average adults, not fine for a 250-pound teenager plus a mattress.

Dimensions and footprint

A vertical twin-over-twin runs about 45 inches wide, 84 to 88 inches tall, and 20 to 24 inches deep closed. Open, it extends roughly 78 inches from the wall and sleeps two 38-by-75 twins. You need 8-foot ceilings minimum. Measure, because 84 inches of cabinet plus the arc of the fold needs every bit of it.

Allow 36 inches of clearance between bunks for the kid on the bottom to sit up, and keep 24 inches of walkway in front when open. Our room measuring guide walks through the clearances.

DIY vs buying: the real cost

Retail murphy bunks start around $1,800 for basic twin-over-twin and climb past $4,500 for hardwood models with storage. You're paying for the scaled-up mechanism and the liability engineering.

DIY is very doable but don't cheap out on the pivot kit. Budget $400 to $600 for plywood and lumber, $500 to $800 for a dual-rated piston or spring kit (you need one rated for the combined weight of two frames plus two mattresses plus two sleepers), and $200 to $400 for two twin mattresses. Total: $1,200 to $1,900, plus our $100 plans, which include the piston sizing math, the single most important number on this build.

What to watch out for

• No kids under 6 on the top bunk, ever. This matches every bunk bed safety standard.
• Size pistons for the real loaded weight: two frames, two mattresses, bedding, and two sleepers. Undersized pistons slam; oversized pistons won't stay closed.
• Build the guardrail to stay put. It should lock upright and fold flat without tools.
• Check ceiling height with the bed mid-swing, not just closed. The top corner sweeps an arc.
• Put the ladder where it can't slip: hook-style ladders beat lean-to every time.

Frequently asked questions