Fit a stacked washer and dryer by measuring the install envelope — ceiling height, width, depth, and clearance for hoses, venting, and doors — not the unit’s listed size.
A stacked pair looks simple until the delivery crew can’t get it past the bathroom door. Ten minutes of measuring covers four things: the opening, the path to it, the hookups behind it, and the doors in front of it. The spec-sheet width is the least useful number — what decides fit is the installed envelope, the total space claimed once the stacking kit, hoses, vent, and service access are counted.
What Measurements Do You Actually Need Before Buying?
Measure floor-to-ceiling first, then width, depth, then the travel path. Most failed installs trace to a doorway or stair turn, not the closet.
- Height: floor to the lowest obstruction. Stacked units run about 70–78 inches installed; aim for ~80 inches clear.
- Width: wall to wall at the narrowest point, including baseboard or door trim.
- Depth: back wall to the front edge, plus room behind for hoses and vent.
- Path: every doorway, corner, and stair — measure the tightest point.
- Hookups: where water lines, drain, and vent sit — behind or beside the machine.
Compare those numbers to real specs. Our tested roundup of apartment stacked washer and dryer picks lists model-by-model dimensions to check against.
How Much Clearance Does a Stacked Unit Need?
LG’s US stacking guide calls for at least 10 cm (about 4 inches) behind the unit, roughly 5 cm (2 inches) per side, and 5 cm between top and ceiling. Those gaps matter: a dryer pushes out heat and moisture, and a kinked washer hose leaks or restricts flow. General practice for 60-cm units also calls for 50–80 mm of side space for cords and heat escape.
Venting matters as much as box size. Alliance Laundry specifies a 4-inch (102 mm) diameter rigid or flexible metal duct — undersized or foil flex duct is a fire risk and slows drying.
Typical Dimensions by Unit Type
| Unit Type | Typical Size (W × H × D) | Notes |
|---|---|---|
| Compact stacked laundry center | 24 in × 66–72 in × 24–26 in | Built as one stacked unit; tightest footprint |
| Compact stackable pair | 23–27 in × 74 in × 22–24 in | Separate washer and dryer plus a stacking kit |
| Stackable, standard range | 24–28 in × 70–78 in × 27–34 in | Depends on model and dryer depth |
| Standard stackable pair | 27 in × 75 in × 30–34 in | Full-size capacity; needs the most room |
| Recommended clear height | About 80 in | Leaves headroom for the top clearance gap |
| Rear clearance (LG) | 10 cm / about 4 in | For hoses and venting behind the unit |
| Side clearance (LG) | 5 cm / about 2 in per side | Plus extra for cords and heat escape |
What Rules Out a Stacked Install Completely?
Some spaces can’t take a stacked pair regardless of numbers.
The kit is the other gate: stacking requires the manufacturer’s own bracket for the exact models, secured to the wall where instructed — A mismatched kit, or a dryer perched without one, is how units walk off the base during a spin cycle.
Door swing is the quiet dealbreaker. A front-load door needs roughly two feet of clear arc; if it faces a hallway or wall, you’ll load sideways forever. Verify the dryer and cabinet doors clear too.
Two more things to verify before buying:
- Lid or door type: a top-load washer generally can’t be stacked.
- Temperature range:
Common Measuring Mistakes That Cost You the Install
- Forgetting the door swing.
- Measuring the appliance, not the opening — then finding trim, baseboard, or a shelf in the way.
- Skipping rear clearance for hoses and vent duct.
- Ignoring ceiling, cabinet, or shelf height above the stack.
- Buying without confirming a compatible stacking kit exists for both machines.
Get the four numbers — height, width, depth, path — then match them to specific models before buying. Full dimensions for compatible pairs are in the roundup linked above.
Common Questions
Can I stack any washer and dryer together?
No. Stacking requires a manufacturer-approved kit for that exact pairing. The washer must be a front-loader of the right depth and height, and the wall may need to anchor a bracket. Check compatibility before buying the second machine.
How much space do I need above a stacked unit?
Leave at least 5 cm (about 2 inches) between the top of the stack and the ceiling or cabinet. Roughly 80 inches of total clear height covers most models without scraping during installation.
Will a stacked pair fit through a standard apartment doorway?
Usually, but not always. Measure the narrowest doorway, stair turn, or hallway along the route, not just the laundry opening. If the tightest point is smaller than the unit’s narrowest unpackaged dimension, choose another model or a disassembly delivery.
Sources
- LG. “How to Stack an LG Washer and Dryer” Clearance gaps, washer compatibility limits, and wall-anchoring requirements.
- Alliance Laundry Systems. “Installation Instructions” Vent duct diameter and leveling guidance for stacked units.
- Whirlpool. “Installation Instructions” Clearance and setup requirements for stackable laundry pairs.