Hot tub installation guide: What to expect from planning to first soak

A hot tub installation can seem like a big job, but the process is straightforward when handled by a team that does it week in, week out. We’ve installed spas in gardens, rooftops, terraces, and even tight city courtyards, each with its own challenges. What matters is knowing what to expect and being ready.

We’ve dealt with crane lifts, restricted access, and last-minute surprises. That kind of experience means we know the questions to ask and the common mistakes to avoid. Here’s how the process works from first conversation to first soak.

What should you check before installation?

Before anything is delivered, we conduct a full site survey. We check access routes, the base condition, and whether water and power supplies are ready. We’ve seen narrow gates and awkward tree branches stall a delivery. Flagging these early avoids delays.

An empty hot tub weighs over 300kg. Filled, it can exceed two tonnes. The base and route need to support this weight without risk.

Do you need planning permission for a hot tub?

Usually, no. Most above-ground spas don’t require planning permission. But if you live in a listed building or are installing extras like a platform or canopy, you may need approval. We’ll highlight any concerns during your site survey.

What’s the best surface for a hot tub?

A flat, reinforced concrete base (100mm thick) is best. Decking and paving slabs can work too, provided they’re structurally supported. Never install directly on gravel or soil. These shift and lead to instability.

Looking for the right model?

Explore our full hot tub collection to compare sizes, styles, and features. Whether you want a space-saving design or a spa fit for the whole family, we’ll help you find one that fits your lifestyle and garden.

What kind of electrical setup do you need?

Most spas require a 32-amp RCD-protected circuit wired from your main board. Smaller models sometimes run on a 13-amp plug, but they may not support all features. A qualified electrician must install a waterproof isolator switch, ideally two metres from the unit. We’ve turned up to installations where this was missing or too far from the spa, easy to fix but avoidable.

What happens on installation day?

We’ll call the day before to confirm timings. On the day, our team checks the route and base and walks you through the plan. If something unexpected crops up, like scaffolding next door, we’ll work with you to solve it. We’ve lifted spas over garages and moved units across gravel using track boards.

Once in place, we connect power and begin filling with water. During the fill, we test systems, walk you through the controls, and explain how to manage water care. Most installs wrap up within a few hours.

How long before your spa is ready to use?

Expect 8–12 hours for the water to reach 38°C, depending on starting temperature. The water also needs correct chemical balance before first use. Some customers fill with warm water from inside to speed things up.

Can you try a model before buying?

Yes, and we strongly encourage it. Testing different models, seats, and jet settings in our showroom helps you make the right choice. Many customers don’t realise how different seat heights or jet placements can feel until they try them in person.

How can you prepare your home and garden?

Installing a spa system affects how you use your outdoor space. Think about seating, storage, privacy, and access. Many customers add decking, pergolas, or lighting to make year-round use easier. We’ve helped families build everything from simple patio zones to full wellness areas with showers and surround sound.

How does installation differ by property type?

Every property presents unique challenges. For terraced houses or flats, we assess whether access through a neighbour’s property or a crane lift is needed. Courtyard gardens often require precise manoeuvring or temporary fencing removal. Our team works with what’s available and plans accordingly.

What extras should you consider?

Steps with handrails, cover lifters, and remote controls are popular add-ons. These can be fitted later too. Lighting upgrades help during darker months. Seasonal extras such as insulated covers or windbreaks improve comfort during winter.

What should you do in winter?

Using your hot tub in colder weather is perfectly doable. Keep the system running to avoid freezing. Insulated covers and energy-efficient settings help manage running costs. Draining during winter is only recommended if you’re leaving it unused for extended periods.

Can you move your spa later?

Yes, if the new spot has access, a stable base, and proper electrics. We regularly help customers relocating or changing garden layouts.

What maintenance does a spa require?

Regular care includes testing water twice a week, rinsing filters, and changing water every few months. Hydropool self-cleaning hot tubs reduce upkeep. Efficient models typically cost £1–£2 per day to run, depending on usage and insulation.

What should you avoid?

Unstable bases, restricted access, and incorrect electrics cause the most delays. Our survey helps identify these in advance.

What surprises new spa owners?

Many people are amazed at how often they use their hot tub. They go from weekends to nightly dips. They also realise maintenance is simpler than expected, especially with the right setup.

Keep your hot tub in peak condition without the upfront cost

Our Hot Tub and Swim Spa Company Gold Service pay-monthly plan makes professional maintenance and chemicals hassle-free. Spread the cost over 12 months, and you’ll receive one annual Gold Service plus three quarterly check-ups managed by our award-winning, factory-trained engineers

Prefer flexibility? We also offer a pay‑as‑you‑go service option with call-out rates ranging from £96–£145 for the first 30 minutes, then £42 per additional half-hour. These transparent plans ensure your spa stays safe, clean, and functioning at its best all year round.

Start your hot tub journey with expert guidance

Visit our showroom to explore our full hot tub collection, speak to our team, and test a model. Or book a site survey to start planning your installation the right way. Based in or near London? Drop in for a personalised consultation or book a home visit to see what’s possible in your space.