Switch height: measurements, rules and best practices

Switch height looks like a simple detail, but it has a direct impact on ergonomics, functionality and the visual read of a space. A well-thought-out installation lets the controls be used without effort, keeps a coherent relationship with doors and furniture and, whenever possible, speaks the same language throughout the house.

In Portugal, I always keep two things apart: the regulatory requirements of the electrical installation, and the best practices of interior design. There's no single height that suits every switch in a house — the position is decided by use, accessibility, architecture and the equipment installed.

Reference height: 110 to 120 cm

In housing, I use 110 to 120 cm from the finished floor to the centre of the switch. 110 cm, in particular, works well in contemporary projects — comfortable to use and visually discreet.

What matters isn't the exact number, it's that the measurement is comfortable day to day, consistent between rooms, compatible with doors and furniture, suited to whoever will live in the house, and always defined relative to the finished floor.

Watch out: the height is measured from the finished floor, never from the slab or the screed. If the floor isn't laid yet, I account for the final thickness of screed, adhesive, ceramic tile, wood, floating floor or other covering — otherwise the measurement ends up off by a few millimetres that add up.

Centre of the mechanism, not the top

When I say 'switch at 1.10 m', I have to say which point of the fitting I mean. I always use the axis/centre of the mechanism — H = 1.10 m AFF (above finished floor). That way the measurement doesn't change depending on the size of the faceplate chosen.

Next to the door

Horizontal position matters as much as height. On entering a room, the switch has to be found and used without the person having to step further into the space. I place it 10 to 20 cm from the door frame, measured between the frame and the centre of the mechanism — the exact distance depends on the width of the faceplate.

On the handle side, always. That way, on entering, the sequence is door → switch → rest of the space — intuitive, without thinking.

Which way the door opens

This is one of the most frequent mistakes on site. It's not enough to draw 'switch next to the door' — I have to check which way the door opens. If the leaf swings against the wall where the switch is, it can hide it, make it harder to reach, or force you to go around the door to get to it.

That's why I define the door's opening direction, the switch position and the nearby furniture all at the same time — and I check this at design stage, not on site.

Bedroom

Next to the entrance, the general lighting switch, at the reference height. Next to the bed, additional controls — general, reading, decorative, and blinds or shutters where they exist. With two sides to the bed, I put independent controls on both sides.

I don't apply 110 cm automatically next to the bed. If the control is integrated into a bedside table or a panel, the height comes from the piece of furniture: headboard → panel → socket/switch are thought of as a single set, not as loose pieces at catalogue heights.

Living room

I organise switches by lighting circuit, not by whichever wall has room left: one for general lighting, one for indirect, one for accent, one for decorative. Instead of four loose switches, I use a multi-gang faceplate or a more integrated control.

What I avoid is a wall full of switches with no hierarchy at all. With several circuits, whoever uses them has to understand at a glance what each one controls.

Kitchen

I always coordinate with the counter, the cabinets, the fridge, the tall units, the island, the doors and the appliances. The general switch sits next to the entrance, at the reference height (110 cm); the counter light has its own separate control.

• Switch 1 → general lighting
• Switch 2 → under-cabinet light
• Switch 3 → island pendants

This separation makes it possible to turn on only what's needed at each moment, not the whole kitchen just to get a glass of water.

Bathroom

The switch sits outside the zone of greatest water exposure, almost always next to the entrance — the position has to respect the protection zones for electrical installations in special-condition locations, which isn't a decorating choice.

Besides the general light, there can be a control for the mirror, for decorative light, for the extractor fan. With several controls, the layout has to be clear — I don't want anyone blindly trying switches to find the one for the fan.

Next to the vanity

When there's a control for the mirror light, I look at the whole set — vanity, tap, mirror, cabinet, sockets — before deciding. I don't place the switch just because 'there's free wall space'. In contemporary projects, it sometimes pays to integrate the control into the mirror's own lighting system, or to use a sensor.

Hallways and stairs: two-way switching

In hallways and stairs, the same light has to be controlled from two places — the entrance and the far end of the hallway, or the lower and upper floor on a staircase. The electrical solution (two-way switches, relays, automation, presence sensors) is defined by what the project calls for, but the principle is always the same: never make anyone cross a space in the dark to turn off the light.

Accessibility

When a project has to meet accessibility requirements, heights and reach zones are checked against the legislation and standards that apply to the building — I don't assume the conventional residential height suits everyone. EN 17210 sets out principles of accessibility and equitable use of the built environment, and in Portugal there are also specific legal requirements depending on the type of building.

Switches and furniture

I never set the switches before the main furniture. A 90 cm-tall sideboard against the wall, with the switch at a 'catalogue' 110 cm, ends up almost touching the top. A wardrobe that takes up the whole wall can hide the switch behind its door.

That's why the electrical plan moves alongside the furniture plan, not behind it.

Sliding doors

These need extra attention, because they can take up the wall when open. Before fixing the switch, I check the door's travel path, the pocket, the trims, the handle and the sliding system — the mechanism has to stay accessible in any position of the door, open or closed.

How many switches per room

There's no fixed number — the right question is how many lighting circuits exist, not how many switches. A living room can have a single control, in a simple solution, or three to four, when there's general, decorative and accent lighting. A kitchen works well with two to three circuits. A bedroom needs the entrance control plus the ones by the bed. The goal is not to lack control, but also not to pile up switches.

Reference table

These are project reference values — they don't replace the regulatory requirements of the installation.

Common mistakes

• Switches at different heights in the same house — even a few centimetres of difference show.
• Measuring from the screed — the reference is always the finished floor.
• Ignoring which way the door opens — it can make the switch almost unreachable.
• Placing the switch behind furniture — a coordination failure, not an electrical one.
• Setting every control at the same height — next to the bed, for example, the height comes from the furniture, not the general rule.
• Concentrating too many switches on one wall — confuses more than it helps.
• Designing the electrical installation before the layout — the most costly mistake of all, and the easiest to avoid.

Switch height is part of interior design, not just an electrical decision. 110 to 120 cm to the centre of the mechanism, from the finished floor, is the practical reference — but the final position is always coordinated with doors, furniture, lighting, accessibility and whoever will use the space. More important than a universal measurement is having the whole house speak the same language.

These are the numbers I use when specifying a house. They don't replace the electrical project or the installation rules: it's the electrician, with the project in hand, who confirms zones, protections and circuit ratings.