Small hot tubs for compact gardens

How small can a hot tub be? Footprints and water volume

“Small” has no fixed size, so it helps to be precise. On this page it means a tub with a current configuration for up to four people and an outside footprint below about 2 metres on its longest side. Inside that group there are two quite different shapes. Oval two-seaters are long and narrow, which suits a strip of patio or the side of a deck. Round and square three-to-four-person tubs are wider, but shorter in their longest dimension than the oval Nordic Duo.

Start with the outside footprint, because that is what has to fit on the base. Then check the inside dimensions, because they decide where legs and shoulders go. Finally, look at the water volume. It tells you how much water you heat, treat and eventually drain, and it sets the load the base has to carry.

Two points stand out. First, the smallest footprint in the range belongs to the oval two-seaters, Nordic Duo Wood and Nordic Oval Duo, at about 1,400 × 900 mm. The product pages do not define those figures as strictly inside or outside measurements, so treat them as a guide and confirm against the order drawing. Second, a small tub is still a substantial body of water. Even the two-seaters hold around 1,000 litres, and the three-to-four-person sizes hold between about 1,200 and 1,800 litres.

The tub is never the whole installation. Steps sit in front of the entry; Nordic Duo’s separately listed steps are about 830 mm long and 780 mm wide. An external stove sits beside the tub with its own clearances. You also need somewhere to stand, somewhere to put the cover, and access to the drain. Mark all of that on the ground before you decide that a corner is big enough.

Small, mini or 2-person: who actually fits

People search for “small”, “mini” and “two-person” hot tubs as if they were the same thing. They overlap, but they answer different questions. “Two-person” is about the number of seats. “Small” is about how much space the tub takes up. “Mini” is a marketing word with no fixed size at all, so it is more useful to look at the published seats, footprint and volume than at the label.

Manufacturer capacity ranges are a guide, not a promise that every adult group will be comfortable. A 3–4 person label usually means four people sitting close together, or three with room to stretch. Think about the people who will use it most evenings, not the busiest day of the year. If four adults want space to move, the 4-person hot tubs guide compares the larger 4–6 person shells.

Seat layout matters as much as size. In the Compact Snorkel, the 18 kW stove sits inside the shell behind a guard. That keeps the outside footprint tight, but the stove takes part of the seating circle; the product page gives a central floor of about 820 mm. A tub with an external stove keeps the whole interior for bathers, at the cost of space beside the tub. Ask for the drawing of the configuration you are ordering and mark the seats on it.

Depth is the other half of comfort. Small tubs in this range are not shallow: the oval models stand roughly 940–1,060 mm high, Flex 1,040 mm and Square about 1,050 mm. That gives a proper shoulder-deep soak rather than a paddling pool. It also means children and less agile adults need steps and a handhold, whatever the size of the tub.

Heating a small hot tub: wood-fired, electric or hybrid

Less water needs less heat for the same rise in temperature, so a small tub is generally quicker to bring up to temperature than a large one with the same heater. How quick depends on the heater, the starting water temperature, the weather, the cover and how the fire is managed. We do not give a single heating time for every garden; ask for an estimate for your configuration with those conditions stated.

Square and Flex have the widest choice, including pellet, gas, a bioheater or connections for a heater you already own. The oval models offer eight heatings built around their external stove, and the Compact Snorkel three, all with its internal stove. Check the exact options for your chosen size on the product page, because not every heater is available on every model.

Small tubs often get used more often precisely because they are easier to prepare. That makes water care more important, not less. Decide early whether you will fill and drain for each session or keep the water and treat it. Keeping the water needs filtration, testing and a cover; draining needs a convenient fill point and somewhere for the water to go. The water care guide explains both routines, and the selected equipment manuals set the details.

Base, access and delivery in tight gardens

In a small garden the hardest part is often not the space for the tub, but the route to it. Measure from where the delivery vehicle will stop to the final position. Note the narrowest gate or passage, any steps or changes of level, tight turns and anything overhead such as eaves or branches. Ask for the packed dimensions and the handling method for your order before you assume the tub will pass through a side passage.

The small models are relatively light when empty. That helps with moving them into place. It says nothing about the filled load, which is what the base must carry.

1. Choose a level, load-bearing base. A concrete slab or a properly built paved base suits most small tubs. Follow our base preparation guide and the support drawing for your model.
2. Treat decks and roof terraces with care. A level-looking deck does not prove it can carry a filled tub on such a small area. Have an existing structure checked by someone qualified before placing a filled tub on it.
3. Plan the water. You need a hose to fill the tub and a sensible place to drain it without flooding a neighbour’s garden or the base itself.
4. Keep the heater and services reachable. Stove doors, drains, filter and any electrical equipment must stay accessible once fences, planters or decking are finished around them.
5. Check the chimney position. Follow the heater’s clearance instructions for fences, trees, sheds and overhead structures, which matter more in a small, enclosed plot.

If you would rather the tub sat level with the deck, InGround Comfort’s TERRACE1 and TERRACE5 shells are designed for sunken or deck-integrated installation. That changes the site work considerably, with drainage and service access to plan below ground level. The sunken hot tubs guide explains what is involved.

Agree in writing where delivery ends. Transport to the property, unloading, moving the tub across the garden and final positioning can be separate jobs. Sort that out before the route is narrowed by landscaping, and keep the confirmed drawing with your order so the base and opening are built to the right size.

Questions about small hot tubs