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Last verified April 2026
Moving a California King or Standard King: Stairs, Doors, and Bed-in-a-Box Reality
Both King sizes are near the upper limit of what a typical American staircase can accommodate. A standard residential stair is 36 inches wide (per IRC R311.7.1). Both King mattresses are over 72 inches wide. At a 45-degree rotation, the effective carry width of a rigid mattress is still over 50 inches, more than most unmodified staircases allow. This is a real logistics problem that mattress-brand blogs do not want to discuss.
Staircase Math
Standard residential stair width
36 inches
Minimum per IRC
Better-quality build
42 inches
More common in post-1990 construction
Larger home / commercial
44-48 inches
Most flexible for moving
Rigid King at 45-degree rotation
50+ inches required
Exceeds all standard stairways
Flexible foam at 45-degree
32-38 inches
Feasible in most staircases
Options by Mattress Type
| Mattress type | Can it bend? | Stair strategy |
|---|---|---|
| Memory foam (boxed, compressed) | Yes, ships compressed | Easiest option for tight stairs. Carry the compressed roll/box up. |
| Latex hybrid | Partially | Can bend somewhat if the latex layer is flexible. Test before full rotation. |
| Innerspring | No | Must go straight. Professional movers or crane required for narrow stairs. |
| Tempur-Pedic Adapt+ | Partial | Ships via white glove delivery, typically avoiding the stair problem entirely. |
| Pillow-top hybrid | No | Thickness plus rigidity makes pillow-tops the hardest to move up stairs. |
Bed-in-a-Box Brand Shipping Matrix
| Brand | Ships compressed? | Cal King compressed? | White-glove option? |
|---|---|---|---|
| Casper | Yes | Yes | Yes, +fee |
| Purple | Yes | Yes (roll-packed) | Yes, +$149 |
| Nectar | Yes | Yes | Yes, +$149 |
| Helix | Yes | Yes | Yes, +$199 |
| Brooklyn Bedding | Yes | Yes | Limited availability |
| DreamCloud | Yes | Yes | Yes, +$149 |
| Saatva | No | No - white-glove only | Included free |
| Tempur-Pedic | No | No - white-glove only | Yes, +$150 |
| Sleep Number | No | No - professional install required | Included free |
| Avocado | Yes (most models) | Most models, compressed | Yes, +$99 |
Split Foundation Workaround
Most foundations and box springs for King and Cal King are available as split two-piece units. Two 38x80 pieces for Split King, or two 36x84 pieces for Split Cal King, assemble under the mattress invisibly from above. This entirely solves the stair problem for the foundation. Extra cost over a solid foundation: typically $0-50. If you have tight stairs, always order a split foundation.
Doorway Reality
Standard interior doors are 32 inches (IRC R311.2). Exterior front doors are typically 36 inches. Both Kings at their width (72-76 inches) must go through doors on their side, which requires room to complete the rotation on the other end. A 90-degree hallway turn with a Cal King's extra 4 inches of length (84 vs 80 inches) is harder than with a Standard King.
Elevator Reality
Standard residential elevators have a 48x60 inch cab. Both Kings fit diagonally if they can flex slightly. Rigid innerspring mattresses and thick pillow-tops may not. Bed-in-a-box foam mattresses, still in their compressed state, fit in most residential elevators without difficulty.
Moving Cost Estimates
| Method | Typical cost | When it works |
|---|---|---|
| DIY with a friend | Free (plus risk) | Compressed foam only; flexible enough to navigate stairs |
| Local mattress movers (2 people) | $150-300 | Rigid mattresses with accessible stairs |
| White-glove delivery (brand included) | Free on orders $1,500+ | Saatva, Tempur-Pedic, Sleep Number - bundled |
| White-glove add-on fee | $99-199 | Casper, Purple, Nectar, Helix, DreamCloud - optional |
| Crane lift through window | $500-1,200 | Pre-war NYC, Boston, Chicago walkups with no stair access |