Where should light switches and outlets go?
Most electricians put switches at 48 inches and outlets at 12 to 15 inches off the floor, because that's what they've always done and nobody asked for anything else. Neither height was chosen for a body. The switch is where a standing adult's hand happens to land; the outlet is as low as the code allows, so it's out of sight.
Both are decided the week the electrician runs the wires, before the drywall, and both are nearly free to move that week. After the wall closes, every one you move is a hole in the wall. Here's where to put them and what to say.
The reach range
The published standard for anything you have to reach, from a seated position or standing, puts it between 15 and 48 inches off the floor (STD). Below 15 is a bend to the floor. Above 48 is a stretch over your shoulder. Standard outlets sit at the bottom edge of that range or below it; standard switches sit right at the top.
So the whole job is moving both toward the middle. Switches down, outlets up.
Switches
Height. I ask for the center of the switch at 42 inches (PRACTICE). It's still natural for a standing hand, and it's within reach from a chair or when you're bent over a walker. Some people go to 36; that's fine too, and more comfortable seated. Anywhere in that band is better than 48.
Type. Rocker switches, the wide flat ones, instead of toggles. A rocker works with a knuckle, an elbow, or the back of a hand holding something. A toggle needs a fingertip.
Where. This matters more than the height:
At the door you actually come in through, on the side without the hinges, so you don't reach around the door for it.
At both ends of every hallway and every stair, so you never walk a dark stretch to turn on the light behind you.
One you can reach from the bed without sitting up. If the room only has a switch at the door, add one at the bedside, or put the bedside lamp on the wall switch.
In the bathroom, at the door and one near the shower, so the shower light isn't a trip across a wet floor.
Lit switches, the ones with a small glow, cost a couple of dollars more and mean you can find the switch at three in the morning without a hand on the wall.
Outlets
Height. I ask for the bottom of the outlet at 18 inches (PRACTICE), and 24 is fine. Either one means plugging in a vacuum or a phone charger without going to the floor. Behind furniture it doesn't matter; the ones that matter are the ones you'll use.
Where. Again, placement over height:
Both sides of the bed, at bedside-table height, not on the floor behind the table. One of them is for the phone and one is for whatever medical thing turns up in five years.
One by the chair you sit in most.
In the bathroom, one within reach of where you'd sit to dry your hair or shave, and one near the toilet, because there are seats that need power and you don't want to find that out later.
At the top and bottom of the stairs. A stair lift needs one. So does a night light.
In the kitchen, on the front edge or the side of the island rather than the wall behind the counter, so you're not reaching across the stove for the toaster. If a section of counter is at seated height, an outlet at that section.
Two more while the wires are going in
A wire to the top of the stairs, capped and labeled, for a lift that may never be installed. It costs a few dollars while the wall is open (PRACTICE).
Light where the work happens, not in the center of the ceiling. Over the shower. Under the upper cabinets in the kitchen. In the closet, on a switch at the door. A ceiling light in the middle of a room lights your back and puts your shadow on the thing you're trying to see.
When it closes
The electrician roughs in the boxes and runs the wire after framing and before drywall. Everything above is a note on the electrical plan or a conversation that week, and it changes almost nothing about the price. Once the drywall is up and painted, each box you add or move is a cut in the wall, a patch, and paint, plus the electrician's minimum call-out.
Same switch. Different week.
What to say
To the electrician, before the rough-in, or on the drawing if there is one:
"Switches at 42 inches to center, rockers throughout. Outlets at 18 inches to bottom. Three-way switches at both ends of every hall and stair. A switch reachable from the bed in each bedroom. Outlets both sides of every bed, one near the toilet, one at the top and bottom of the stairs, and a capped feed at the top of the stairs for a future lift."
If they push back on the heights, the answer is that both are within the published reach range and it costs nothing to do it now. Most electricians will shrug and do it.
The list this belongs to
Switch and outlet heights are one of the fifteen things that disappear behind the drywall, and the free guide, The Decisions Your Renovation Makes Without You, lists the rest by the week they close. Short, large print.
