The stairwell is the hardest room in the house to light
Most rooms are seen from one height. You stand in them or sit in them, and the light is arranged for an eye at one of those two heights. A stairwell is seen from the hall below, from every step of the flight, from the landing above and, after dark, from the pavement through the landing window. A fitting there is looked up at, across at and down on, often by the same person within half a minute. Nothing else in the house asks one object to survive that many angles.
The advice most people find when they search for it is American, measured in feet and built around a single number for clearance. What follows is the British answer, in metres, and the questions that come after the sizing, which nobody tends to raise until the scaffold has gone.
Four positions, one object
From the hall the piece is a silhouette against the ceiling, read whole as you come through the front door. From the flight it moves past you at eye level, so the middle of the piece, its arms, glass and cable, is seen at closer range than in any other room. From the landing you look down on it, which means the part a maker usually spends least on, the canopy, the top of the frame and the run of flex, becomes the part you see most.
The fourth view is the one designers forget. A landing window at night turns into a mirror, so a lit fitting hanging in front of it is seen twice from inside, and from the street it becomes the brightest object in the front of the house. Every bare lamp is doubled, and so is every untidy cable.
A stairwell fitting has to work from all four. Most catalogue pieces are drawn for the view from the hall.
What the regulations say, and what they do not
The figure that circulates online is 7 feet of clearance, about 2.13m, and it is American. In England the relevant document is Approved Document K, the 2013 edition, which supports the Building Regulations 2010 on stairs and protection from falling.
Its paragraph 1.11 asks for a minimum headroom of 2m on the access between levels, measured above the pitch line of a flight (the notional line through the nosings) and above each landing. Where a loft conversion leaves too little room, it accepts 1.9m at the centre of the stair and 1.8m at the side. That is the whole of it.
The document is written about the stair and the clear zone a person needs to climb it. It does not mention light fittings, and it says nothing about anything hanging over the floor of the hall. The 2m is a minimum for walking under and no guide at all to where a chandelier should hang. Treat it as absolute over a flight or a landing, knowing that a fitting which only just clears it will still look like a hazard. Over the open well, the decision is a visual one.
How big, and why the rules disagree
The sizing rule Google offers first is a sum: add the length and width of the space in feet and read the answer as the diameter in inches. Run it on a stairwell 3m square and it gives roughly 50cm. The second rule it offers, half to three quarters of the width of the opening, gives 1.5m to 2.25m for the same space. Two rules from the same page of answers, three to four times apart. They are starting points dressed up as laws.
A more useful starting point works in thirds. Measure the narrowest plan dimension of the open well, the clear air between balustrades rather than the room, and begin with a piece about a third of that width. It leaves a third of open space either side, which is enough for the piece to read as an object from the landing and in a well of any size keeps it beyond easy reach of the handrail. In a generous well the proportion can grow. In a tight one, the answer is usually length rather than width.
For height, begin with the bottom of the piece at about the level of the first floor, or a little below it. A private stair in England may rise no more than 220mm a step, so the familiar British flight of thirteen climbs at most 2.86m. A fitting finishing around there is seen whole from the front door, and the eye on the landing meets its body rather than its crown. Then cut a disc of card to the proposed diameter, hang it on string at that height, and walk the stair. Ten minutes of that settles more than any formula.
The forms that suit a vertical void
Here the usual advice is right. Cascades, spirals and multi-drop pieces suit a stairwell, because a vertical form shows a similar silhouette from every height, where a single flat tier reads properly only from below.
Terzani's Atlantis, designed by Barlas Baylar, is a clear example of the cascade. Its large three-tier form is 90cm across with a body of 205cm and weighs 37kg, fine brass chain draped over polished bands and lit from within by LED. Terzani lists custom drops for stairwells and double-height spaces as something arranged through the studio.
Italamp's Pulsa Spira 439/SP20 takes the spiral route, fluted blown-glass shades winding around hidden LED sources, and it is described as a stairwell and double-height piece. It is 150cm across and 100cm high, so it wants a broad well rather than a deep one, and its drop adjusts from 10cm to 100cm. In a void 6m tall, that puts its lowest point about 2m below the ceiling, above first-floor level in most houses. A deeper hang is a question for the maker before it is a question for the electrician.
The multi-drop, individual pendants at staggered heights, is the most adaptable, because each cable can be cut to length on site. It is also the form that most often looks unresolved from the landing, where the eye meets a cluster of ceiling plates and wires.
The lamp nobody can reach
At 5m or 6m a stepladder is out of the question. There are three answers, and the choice is made at design stage.
The first is a tower. Towers can stand on a flight, but they are stepped towers with their own components, and the industry body PASMA runs a separate course for towers on stairways. Every lamp change becomes a booked visit.
The second is a winch. British lifting firms make chandelier winches (Penny Engineering in Derbyshire lists them among its products), which lower a piece within reach for cleaning and lamp changes. A winch needs room above the ceiling, a way to reach it, and a fixing designed for the load, all of which belong in the drawings before the ceiling is boarded.
The third is to need the access less often. When the government announced the end of most halogen lamp sales in 2021, its own figure was that an LED lasts five times as long. With integrated LED the question shifts, because the part that eventually fails is a module or a driver. Ask whether the modules can be replaced (Terzani's I Lucci Argentati lists replaceable LED modules), and ask where the driver sits. One hidden in a canopy at 6m is a tower visit. One placed in a cupboard at hall level is a screwdriver.
What the ceiling has to carry
The pieces suited to a stairwell are heavy. The Pulsa Spira is listed at 30kg, the large three-tier Atlantis at 37kg, and the broader two-tier Atlantis, 110cm across, at 45kg. The wiring regulations, BS 7671, set a floor of 5kg for the fixing of a suspended fitting, and leave anything heavier to the installer, who must make sure the fixing will carry its real mass. Every one of these pieces is six times that minimum or more.
A load like that is taken into the structure above, not into plasterboard, and the fixing position is set before the ceiling is closed. It is one of the lighting decisions that come before the plaster, and in a stairwell the sharpest, because that ceiling is the one surface nobody reaches again without a scaffold.
The treads need their own light
A chandelier lights the void, and does little for the treads. What it offers them is a bright source in the eyes of someone coming down, and steps lit from high above with little to show where one ends and the next begins.
The steps want light of their own, low and grazing, from recessed step lights or small wall lights at a steady rhythm along the flight, on a separate circuit. That lets the decorative piece be dimmed to a glow, or switched off at midnight, while the stair stays legible. It is the stairwell version of the principle in our five-layer reference: the decorative layer is allowed to be beautiful precisely because something else is doing the work.
Why the stairwell is the commission room
In most rooms a fitting can be chosen and the room adjusted around it. In a stairwell the height, the width of the well, the landing levels and the window are fixed by the building, and the piece has to answer all of them at once. So the honest answer to whether a chandelier can be made to fit a particular ceiling height is yes, in two senses. Many made-to-order pieces have a suspension set on site (both Terzani pieces above are specified that way), and some houses, as Terzani does with the Atlantis, will arrange a custom drop. A true commission sets the length of the body itself, the tiers, the view from the landing and the weight the structure can take. That is why the stairwell, more than any other room in the house, is where a piece made to measure earns its cost. We have set out what a commission costs and why.
A maker needs four things to begin: a section through the stair, the floor-to-ceiling height of the void, the clear width between balustrades, and a photograph from the landing. If that is the room you are trying to solve, bring us the section.
Words by Julian Reeve