What we designed on that plot, and what Domus Nova wrote about in their journal, isn’t a house that argues for more square footage. It argues for a triple-height stairwell, an inverted plan, and a single material palette worked patiently across three floors. What follows is the thinking behind those calls, in longer form than a press feature has room for.

Most London houses are drawn front to back. Long, narrow, one room deep, terraced. You spend a lot of a project moving service, circulation and light along that axis. Russell Gardens Mews wasn’t like that. It sat almost square in plan, and that changes the design problem.

The squareness of the building was interesting. With a typical period home, you’re always designing front to back. Here, there was the option for a lot more flexibility. You can pull the stair out of a corner and let it become architecture. You can push social space to where the light is, rather than where the street is. You can let the section do the work.

What follows is a working list of the calls we make at Studio AROS when we shape a holiday home interior. They are the calls that decide whether a property holds its rate or quietly drifts. Most are unglamorous. All of them compound.

Listing photographs matter. They sell the place. But the schemes that earn their keep across a decade are the ones built for a Friday night in February, when guests arrive late, the dog has been sick in the car, and someone has left half a flapjack on the back seat.

Plans drawn around real arrivals look different to plans drawn around hero shots. Wider hallways. A coat hook at child height. A landing window that catches afternoon light in the kitchen.

What follows is how we shape a coastal interior at Studio AROS, sharpened by recent work on the Welsh coast.

The most useful thing you can do on a coastal job is sit in the rooms at four times of day. Coastal light has a different temperature, a different density and a different colour cast at every hour. It lifts material in ways that inland light never will. Once you know how the rooms behave at first light, mid morning, late afternoon and dusk, palette decisions almost write themselves.

Anchors are motifs. Driftwood is a motif. A piece of local stone in the fire surround, the same stone you see in the cliff path outside, is material. Coastal interior design works best when the place enters the room through what something is made of, rather than what something looks like.

For us, an organic interior is doing three things at the same time.

Honest materials. The room is built from things that are what they appear to be. Stone is stone. Oak is oak. Plaster is plaster. Nothing is laminated to look like something else. Soft light. Light is allowed to be light. Daylight, low evening lamps, controllable layers. Very little overhead glare. No scenes that read like a showroom. Time as a design material. The scheme is drawn on the assumption that the room will get older. Materials soften, scratch, fade and gain a patina, and the design accepts that. Or even requires it.

An interior that does only one of those things might be called organic colloquially. An interior that does all three earns the word.

This is a tour of the calls we make at Studio AROS on holiday let interior design projects, and the small things that turn a property into one that books, repeats and holds its nightly rate.

The room you walk into on a Friday night with one other person should feel cocooned. The same room, on Saturday with eight, should feel comfortably hosted. Most failed holiday lets are designed for one of those scenarios and not the other. The good ones are designed for both.

Holiday let interior design lives or dies on operations. The cleaner who turns the property over each week is the person who decides, week after week, whether it looks the way it should. Linen needs to be on the right floor. Cleaning kit needs an obvious home. There needs to be a place for the wet towels guests leave behind, and it can’t be the place they take a photograph of.

That protection is a gift to the design rather than a constraint on it. Good Gower interior design isn’t a project that has to survive the AONB rules. It is a project that has been shaped by them.

The Gower has a vocabulary. Limewashed walls. Welsh stone, that warm, slightly pinkish grey. Oak the colour of the cliff path after rain. A sky that is rarely fully blue and rarely fully grey. Houses that sit well in the Gower share that vocabulary, and the interiors that sit well in those houses share it too.

This is where coastal interior design done well overlaps almost completely with organic interiors. A narrow, warm, honest palette, drawn from the place and designed to age in tune with it.