Hot Tubs in a Holiday Let: The Uplift and the Obligation
Few features move the needle in a holiday let quite like a hot tub. It is consistently among the most searched for amenities in the UK, and for properties in rural settings like Loch Lomond it can be the detail that tips a guest from browsing to booking. The appeal is easy to understand. There are, however, two sides to a hot tub, and the second is the one owners tend to underestimate. The uplift is real, but so is the responsibility that comes with it, and the two are more closely linked than most people assume.
The Commercial Case
The figures published by the larger letting agencies are genuinely compelling. Sykes and its regional brands report that a hot tub can lift a property's annual income by around 37 to 40 per cent, and some suppliers put the figure higher still. Booking volume rises too, with one agency reporting roughly a tenth more bookings for properties that have one. Set against the high search demand for cottages and lodges with hot tubs, the case for installing one looks strong on paper.
What matters as much as the headline number is when those bookings fall. A hot tub is at its most valuable in the shoulder seasons, the spring and autumn weeks when the appeal of a warm soak after a cold walk is strongest. For a market like Loch Lomond, where year round and out of season demand is part of what makes a property profitable, that effect is worth more than the peak summer figures alone suggest. Higher guest satisfaction also feeds back into stronger reviews, and stronger reviews improve visibility and bookings in turn.
We would add one honest caveat. These figures are averages drawn from large portfolios, and the uplift is not uniform. The benefit depends on the property, its location, its target guest and the standard to which the tub is run. A hot tub improves the right home considerably and does very little for the wrong one, so the question is never whether hot tubs are popular in general, but whether one genuinely improves your property enough to justify the cost and the work involved.
The Part That Is Easy to Underestimate
That work is where many owners are caught out. A hot tub in a property you let to paying guests is not treated in law as a domestic appliance. It is regarded as a commercial spa pool, used by one group of bathers after another, and that places it under a specific set of health and safety expectations. The warm, aerated water that makes a hot tub so appealing is also an ideal environment for bacteria, including legionella and Pseudomonas, if it is not properly controlled. The standards exist for good reason.
This is the single most common misunderstanding we see. Owners install a domestic style tub and care for it as they would at home, not realising that letting it to guests changes the obligation entirely. The benchmark for getting it right is a Health and Safety Executive document called HSG282.
What HSG282 Requires
HSG282 is the HSE's guidance on controlling legionella and other infectious agents in spa pool systems, and it is the standard inspectors work to. If you follow it, you are on firm ground. If you depart from it, you have to be able to show your approach is equally safe. In holiday lets, enforcement usually sits with the local council. In practical terms, running a hot tub to this standard means putting the following in place:
A written legionella risk assessment for the tub, which forms the basis of everything else
A written operating scheme setting out target water chemistry, daily and weekly tasks, who is responsible, and what to do when something goes wrong
Disinfection through an inline feeder using chlorine or bromine, with free chlorine typically held around 3 to 5 mg/l or bromine around 4 to 6 mg/l, and pH kept between 7.0 and 7.6
Water tested and recorded at least twice a day while the tub is in use
Filtration able to circulate the entire volume of water quickly, generally within around fifteen minutes
A full drain down, clean and refill between each group of guests or at least once a week, whichever comes first
Monthly microbiological sampling and periodic legionella testing through a UKAS accredited laboratory, with the tub taken out of use if a result falls outside safe limits
Records of all testing and maintenance kept for at least five years
None of this is especially difficult, but it is regular, and it is unforgiving of shortcuts. It also rules out some popular options. Wood fired tubs without filtration and chemical dosing, and most inflatable tubs, are very hard to run to this standard, so the choice of tub matters as much as the decision to have one at all.
Why the Rules and the Returns Are Connected
It is tempting to see compliance purely as a cost that eats into the uplift. In reality the two are linked, and that link works in favour of owners who take it seriously. The reason a well run hot tub commands a premium is precisely that running one properly takes discipline that many casual operators do not maintain. A tub that is consistently clean, clear and safe becomes a genuine point of difference, while one that is neglected damages trust faster than having no tub at all.
The downside of getting it wrong is significant and worth stating plainly. Beyond the real risk to guest health, an owner who falls short can face improvement or prohibition notices, fines or prosecution, problems with insurance and lasting reputational harm. A single serious incident can undo years of careful work. The standard is not bureaucracy for its own sake, it is the thing that protects both your guests and your business.
Our View
We treat a hot tub as an operational system rather than a feature bolted onto a property. For the homes in our care, that means the right specification of tub in the first place, a documented testing and cleaning routine built into every changeover, a scheduled programme of laboratory testing, and records kept properly so that compliance can always be demonstrated. It is unglamorous, detailed work, and it is exactly the kind of thing that separates a property run as a hospitality business from one run on goodwill.
A hot tub can be one of the best investments you make in a holiday let, both for the income it brings and for the experience it gives guests. It earns that return when it is chosen well and run to standard. If you are weighing one up for a property in the National Park, or you already have one and want to be sure it is being managed correctly, we are happy to talk it through.
This guide is intended as general information rather than legal or technical advice. Anyone operating a hot tub in a let property should read HSG282 in full and seek specialist support where needed.