Swimming Pools Explained

Everything You Need to Know Before Buying a Property with a Swimming Pool

Whether you're buying a family home, a holiday retreat or an investment property, a swimming pool can be one of the most attractive features a property has to offer.

For many buyers, it's the image that sells the dream. Crystal-clear water, sunshine and somewhere to relax after a long day.

However, owning a swimming pool is about much more than enjoying a swim.

Pools require maintenance, regular servicing, electricity, water, chemicals and ongoing care. If neglected, they can quickly become expensive to repair and, in some cases, unsafe to use.

Understanding how a pool works before you buy can help you avoid unexpected costs and make sure your investment continues to add value for years to come.

This guide explains the different types of swimming pools, how they operate, what they cost to maintain and the questions every buyer should ask before purchasing a property with one.

Should You Have a Swimming Pool?

A swimming pool isn't essential for every property.

Before deciding whether a pool is a benefit or simply another responsibility, think about how you'll actually use it.

Ask yourself:

• Will you use it regularly?
• Is the property intended as a holiday home?
• Will guests expect a pool?
• Are young children likely to use it?
• Do you have time to maintain it?
• Are you happy to budget for ongoing running costs?

In warmer climates such as Costa Rica, Spain, Portugal, Cyprus and parts of Greece, a pool can significantly improve the appeal of a property, particularly if it's used as a holiday rental.

In cooler climates, however, you may find the pool is only used for a few months each year while still requiring maintenance throughout the year.

Different Types of Swimming Pools

Not all swimming pools are built the same.

The construction method affects everything from durability and appearance to maintenance costs and future repairs.

Understanding which type of pool you're buying can save expensive surprises later.

Concrete Pools

Concrete pools are considered the premium option and are commonly found in luxury homes and bespoke developments.

They're constructed on-site using reinforced concrete before being finished with tiles, plaster or specialist coatings.

Advantages

• Extremely strong and durable.
• Can be built in almost any shape or size.
• Excellent for sloping or unusual sites.
• Can include infinity edges, beach entries and custom features.
• Usually adds significant value to a property.

Disadvantages

• Highest construction cost.
• Longest installation time.
• Surface may require resurfacing every 10–20 years.
• More maintenance than some other pool types.

Concrete pools can last for many decades when properly maintained.

Fibreglass Pools

Fibreglass pools are manufactured in a factory before being transported to the property and lowered into an excavated hole.

Because they arrive as one complete shell, installation is usually much quicker than a concrete pool.

Advantages

• Fast installation.
• Smooth surface that's comfortable underfoot.
• Lower maintenance.
• Resistant to algae growth.
• Good durability.

Disadvantages

• Limited choice of sizes and shapes.
• Large shells can be difficult to transport to remote properties.
• Repairs often require specialist companies.

Fibreglass pools are becoming increasingly popular due to their lower maintenance requirements.

Vinyl Liner Pools

These pools are built using a structural frame with a waterproof vinyl liner fitted inside.

They're commonly found in North America but are less common in many European countries.

Advantages

• Lower installation cost.
• Comfortable smooth finish.
• Easy to replace damaged liners.

Disadvantages

• Liners eventually wear out and require replacement.
• Sharp objects can puncture the liner.
• Lower lifespan compared with concrete.

Replacing a liner is a normal part of ownership and should be factored into future maintenance costs.

Natural Swimming Pools

Natural swimming pools use plants, biological filters and natural ecosystems instead of relying solely on chemical treatment.

They're becoming increasingly popular with environmentally conscious homeowners.

Rather than looking like a traditional bright blue swimming pool, they often resemble a natural pond with crystal-clear water.

Advantages

• Minimal chemical use.
• Environmentally friendly.
• Beautiful natural appearance.
• Can encourage wildlife.

Disadvantages

• More specialist design.
• Requires a larger area.
• Higher initial construction costs.
• Maintenance is different from conventional pools.

Natural pools can be stunning but are not suitable for every climate or every property.

Infinity Pools

Infinity pools create the illusion that the water stretches endlessly into the horizon.

They're particularly popular on hillside properties and homes overlooking the sea, mountains or lakes.

Advantages

• Spectacular visual effect.
• Adds luxury appeal.
• Extremely desirable for holiday rentals.
• Can increase property value.

Disadvantages

• Higher construction costs.
• More complex engineering.
• Additional pumps and balance tanks often required.
• More expensive to maintain.

Infinity pools are beautiful, but they involve considerably more equipment than a standard swimming pool.

Above Ground Pools

Above ground pools are generally the most affordable option and can often be installed without major excavation.

They're ideal for homeowners looking for seasonal use without the expense of a permanent in-ground pool.

Advantages

• Lowest installation cost.
• Quick to install.
• Easier to remove or replace.
• Lower initial investment.

Disadvantages

• Less visually appealing.
• Usually smaller.
• Can reduce rather than increase property appeal.
• Shorter lifespan than permanent pools.

For some families they're an excellent choice, but they rarely add the same value as a professionally installed in-ground swimming pool.

Which Type of Pool Is Best?

There isn't one perfect answer.

The best swimming pool depends on:

• Your budget.
• The size of your property.
• The local climate.
• Whether the property is for personal use or holiday rentals.
• How much maintenance you're willing to undertake.

A family home may benefit from a simple fibreglass pool that's easy to maintain, while a luxury holiday villa overlooking the sea may justify the additional investment in an infinity pool.

The key is understanding not only the purchase price, but also the long-term maintenance and running costs.

Wayne's Tip 💡

Don't be impressed simply because a pool looks beautiful.

A fresh coat of paint, new tiles or crystal-clear water can make almost any pool look inviting.

What's far more important is what's underneath the surface—the pumps, filters, pipework and overall condition of the pool.

A well-maintained ten-year-old pool is often a much better investment than a neglected two-year-old pool.

Always look beyond the water.

Coming up in Part 2:

• Chlorine vs Salt Water Pools
• Heated Pools
• Pool Pumps, Filters and Equipment Explained
• Running Costs
• Maintenance Schedules
• Water Usage
• Typical Build and Maintenance Costs

Chlorine or Salt Water?

One of the first questions you'll hear when buying a property with a swimming pool is:

"Is it a chlorine pool or a saltwater pool?"

Many people assume saltwater pools don't use chlorine.

This is one of the biggest misconceptions about swimming pools.

In reality, a saltwater pool still uses chlorine. The difference is that the chlorine is produced naturally by a salt chlorinator rather than being added manually as tablets or liquid chemicals.

Both systems can produce crystal-clear, safe swimming water when maintained correctly.

Chlorine Pools

Traditional chlorine pools are still the most common type of swimming pool around the world.

The water is sanitised using chlorine tablets, granules or liquid chlorine, which kill bacteria and algae.

Advantages

• Lower installation costs.
• Simple equipment.
• Easy to repair.
• Suitable for almost any pool.
• Widely understood by pool maintenance companies.

Disadvantages

• Chemicals need topping up regularly.
• Strong chlorine smell if poorly balanced.
• Can irritate sensitive skin and eyes.
• Water chemistry requires regular testing.

A strong chlorine smell doesn't necessarily mean the pool contains too much chlorine. It often indicates the water chemistry is unbalanced and should be checked.

Saltwater Pools

Saltwater pools use a salt chlorinator, sometimes called a salt generator.

A small amount of salt is added to the water. As the water passes through the chlorinator, electricity converts the salt into chlorine, sanitising the pool.

The process repeats continuously, making maintenance easier for many owners.

Advantages

• Softer feeling water.
• Less eye irritation for many swimmers.
• Less frequent manual chemical dosing.
• More consistent chlorine levels.
• Often preferred by holiday rental guests.

Disadvantages

• Higher installation costs.
• Salt cells eventually need replacing.
• Salt can corrode some metals if unsuitable materials are used.
• Specialist servicing may occasionally be required.

Saltwater pools generally cost a little more to install but can be easier to manage over the long term.

Which Is Better?

Neither system is automatically better.

A well-maintained chlorine pool is far preferable to a neglected saltwater pool.

When buying a property, focus on:

• Has the pool been properly maintained?
• Is the equipment in good condition?
• Are maintenance records available?

These questions are often more important than the type of sanitising system installed.

Heated Swimming Pools

Heating can transform how often you'll use your pool.

In warmer countries, some owners never heat their pool.

In cooler climates, heating can extend the swimming season by several months.

Heat Pumps

Heat pumps are now the most popular option.

They work by extracting heat from the outside air.

Advantages

• Energy efficient.
• Lower running costs than electric heaters.
• Reliable.
• Environmentally friendly.

Disadvantages

• Higher purchase price.
• Less effective during very cold weather.

Electric Heaters

Electric heaters warm the water directly.

Advantages

• Lower purchase cost.
• Quick to install.
• Compact.

Disadvantages

• Higher electricity bills.
• Less economical for larger pools.

Gas Heaters

Gas heating provides rapid heating.

Advantages

• Heats water quickly.
• Ideal for occasional use.

Disadvantages

• Higher fuel costs.
• Requires a gas supply.
• More expensive to run over long periods.

Solar Heating

Solar heating uses roof-mounted panels or solar collectors.

Advantages

• Extremely low running costs.
• Environmentally friendly.
• Excellent in sunny climates.

Disadvantages

• Weather dependent.
• Slower heating.
• Higher installation costs.

Many owners combine solar heating with a heat pump to reduce operating costs.

Pool Equipment Explained

Every swimming pool relies on equipment working behind the scenes.

Most of it is hidden away in a pump room or equipment shed.

Pool Pump

The pump is the heart of the swimming pool.

It circulates water through the filtration system before returning clean water back into the pool.

Without the pump, water quickly becomes dirty and unsafe.

Pool Filter

The filter removes dirt, leaves, insects and other particles.

Common filter types include:

• Sand filters.
• Cartridge filters.
• Glass media filters.

Filters need cleaning regularly to remain effective.

Skimmers

Skimmers remove floating debris from the surface before it sinks.

Emptying skimmer baskets is one of the simplest but most important maintenance tasks.

Main Drain

Located at the bottom of the pool, the main drain helps circulate water and remove debris.

Modern pools often include multiple safety features to reduce suction risks.

Return Jets

These push filtered water back into the pool and help circulate chemicals evenly.

Good circulation reduces algae growth and improves water quality.

Salt Chlorinator

Only fitted to saltwater pools.

This converts dissolved salt into chlorine and should be inspected regularly.

The salt cell will eventually require replacement as part of normal maintenance.

Pool Lights

Underwater LED lighting has become increasingly popular.

Check that:

• Every light works.
• No water has entered the fittings.
• Electrical connections appear professionally installed.

Timers & Automation

Many modern pools automatically control:

• Pump operating times.
• Heating.
• Lighting.
• Chemical dosing.

Automation reduces maintenance and can improve energy efficiency.

How Often Does a Pool Need Maintaining?

Swimming pools require regular attention.

Ignoring small jobs often leads to larger repair bills later.

Daily

• Remove leaves and debris.
• Check water level.
• Visually inspect the water.

Weekly

• Vacuum the pool.
• Empty skimmer baskets.
• Test water chemistry.
• Brush pool walls.
• Check the pump.

Monthly

• Clean or backwash the filter.
• Inspect equipment.
• Check pipework for leaks.
• Inspect timers and controls.

Annually

Arrange a professional service.

This should include:

• Equipment inspection.
• Pump servicing.
• Filter inspection.
• Leak checks.
• Electrical safety inspection.
• Heating system inspection.

Preventative maintenance is almost always cheaper than emergency repairs.

Typical Running Costs

Running costs depend on:

• Pool size.
• Climate.
• Heating.
• Local electricity prices.
• Water costs.
• Whether you maintain it yourself.

Typical ongoing costs include:

• Electricity.
• Chemicals.
• Salt (if applicable).
• Water.
• Cleaning equipment.
• Replacement filters.
• Pump servicing.
• Professional maintenance.

A heated pool will almost always cost significantly more to run than an unheated pool.

Typical Construction Costs

Construction prices vary enormously depending on country, labour costs, ground conditions and the finish you choose.

As a very rough guide:

These figures are intended as general guidance only. Costs vary widely between countries and individual projects.

Can You Fill a Pool Anywhere?

This is an important question that many buyers overlook.

Ask:

• Where does the water come from?
• Is it mains water?
• A private well?
• A borehole?
• A spring?

If the property relies on a private water supply, make sure it can comfortably provide enough water without affecting the household.

In some countries or regions, drought restrictions may limit when pools can be filled or topped up.

It's also worth asking:

• How long does it take to fill the pool?
• What happens if it develops a leak?
• Where does the water go when the pool is emptied for repairs?

Understanding the property's water supply can be just as important as understanding the pool itself.

Wayne's Tip 💡

Swimming pools don't usually become expensive overnight.

Small issues—such as a noisy pump, a slow leak or slightly cloudy water—are often early warning signs that something needs attention.

Don't ignore them.

Fixing a £50 seal today is far better than replacing a £1,500 pump tomorrow.

A little preventative maintenance can save a lot of money in the long run.

Buying a Property with an Existing Swimming Pool

If the property already has a swimming pool, don't simply admire the clear blue water.

A freshly cleaned pool can hide expensive problems beneath the surface.

During your viewing, ask to inspect both the pool and the equipment that keeps it running.

Spending an extra 15 minutes checking a pool could save you thousands of pounds in unexpected repairs.

Questions Every Buyer Should Ask

Don't be afraid to ask plenty of questions.

A well-maintained pool is something the owner should be proud to talk about.

Ask:

• How old is the swimming pool?
• Is it concrete, fibreglass or vinyl lined?
• Is it chlorine or saltwater?
• Is it heated?
• What type of heating system does it use?
• How old is the pump?
• When was the filter last serviced?
• Has the pool ever leaked?
• Has it ever been resurfaced?
• Are there maintenance records?
• Is there a regular pool company?
• How much does it typically cost to maintain each month?
• Does the pool lose water?
• Has any equipment recently been replaced?
• Is all of the pool equipment included in the sale?

Good owners often keep invoices and service records, which can provide confidence that the pool has been properly looked after.

What Should You Inspect?

Take your time and walk all the way around the pool.

Look carefully for:

• Cracks in the pool shell.
• Loose or missing tiles.
• Broken coping stones.
• Uneven paving.
• Damaged grout.
• Rust stains.
• Water marks suggesting leaks.
• Damaged ladders.
• Loose handrails.
• Broken lights.
• Missing drain covers.
• Poor sealant around fittings.

Small cosmetic issues are common.

Large structural cracks or signs of movement should be investigated by a professional.

Look at the Water

Crystal-clear water is always a good sign.

However, don't judge a pool purely by appearance.

Look for:

• Cloudy water.
• Green algae.
• Floating debris.
• Excessive leaves.
• Strong chemical smell.
• Staining around the waterline.

A neglected pool often shows several of these warning signs.

Always Inspect the Pump Room

Many buyers never ask to see where the equipment is located.

You should.

The pump room tells you far more about how well the pool has been maintained than the water itself.

Ask to see:

• Pump.
• Filter.
• Salt chlorinator (if fitted).
• Heating equipment.
• Pipework.
• Valves.
• Electrical controls.
• Timers.

Look for:

• Water leaks.
• Corrosion.
• Temporary repairs.
• Untidy wiring.
• Excessive noise.
• Vibrating pumps.

A clean, organised equipment room often reflects an owner who has looked after the entire pool.

Ask to See Everything Working

Seeing equipment operate is always better than simply being told it works.

Ask the owner to:

• Turn on the pump.
• Switch on the lights.
• Operate any waterfalls or fountains.
• Demonstrate the heating system.
• Show automatic timers.
• Explain the maintenance routine.

If something can't be demonstrated during the viewing, ask why.

Check the Surrounding Area

The swimming pool is only part of the overall picture.

Also inspect:

• Pool terrace.
• Drainage.
• Retaining walls.
• Fencing.
• Gates.
• Lighting.
• Outdoor showers.
• Pool furniture.
• Shade.
• Trees.

Large trees can create significant cleaning work by constantly dropping leaves, flowers and seeds into the water.

Pool Safety

Swimming pools should always be treated with respect.

If children regularly visit the property, consider additional safety measures.

These may include:

• Safety fencing.
• Self-closing gates.
• Pool covers.
• Anti-slip paving.
• Pool alarms.
• Clearly visible rescue equipment.
• Good lighting for evening use.

Different countries have different legal safety requirements, so always check local regulations.

Swimming Pools and Holiday Rentals

A swimming pool is often one of the biggest attractions for holiday guests.

It can increase bookings, improve nightly rates and make your property stand out from competitors.

However, guests also expect the pool to be:

• Clean.
• Safe.
• Well maintained.
• Properly lit.
• Ready to use throughout their stay.

Many negative holiday rental reviews mention dirty pools, broken pumps or cloudy water.

Regular maintenance is one of the best investments you can make.

Wayne's Tip 💡

If the owner is happy for you to do so, take your shoes off and walk around the pool barefoot.

You'll quickly notice:

• Loose tiles.
• Sharp edges.
• Slippery surfaces.
• Uneven paving.
• Hot surfaces in direct sunlight.
• Poor drainage after splashing.

These are exactly the things you'll notice every time you use the pool—and exactly what your guests will experience too.

Sometimes your feet tell you more than your eyes.

Buyer Checklist

☐ Pool type confirmed.

☐ Chlorine or saltwater identified.

☐ Heating system inspected.

☐ Pump operating correctly.

☐ Filter inspected.

☐ Water clear.

☐ No obvious leaks.

☐ Lights working.

☐ Maintenance records available.

☐ Running costs understood.

☐ Water supply confirmed.

☐ Safety features checked.

☐ Surrounding paving inspected.

☐ Pool equipment included in the sale.

☐ Professional inspection considered if concerns exist.

Your Due Diligence Library

Understanding a swimming pool is only one part of buying a property.

We also recommend reading:

• Due Diligence Explained
• Can I Legally Buy Property Abroad?
• Can I Rent Out My Property?
• Property Management Explained
• Water Supplies Explained
• Can I Drink the Water?
• Hot Water Systems Explained
• Septic Systems Explained
• Air Conditioning Explained
• Termites, Pests & Pets Explained
• Roofs Explained
• Boundaries Explained
• Rivers & Oceans Explained

Together, these guides will help you make informed decisions before committing to a purchase.

Wayne's Final Thoughts 💡

A swimming pool can be one of the best features a property has to offer.

It can create wonderful family memories, increase the appeal of a holiday rental and even add value to your investment.

But don't let the sparkling water distract you.

A pool is much more than a hole filled with water.

Hidden beneath the surface are pumps, filters, pipework, electrical systems and heating equipment—all of which require care and maintenance.

Take the time to inspect the entire system, ask plenty of questions and understand the ongoing costs before you buy.

A well-maintained pool is a pleasure to own.

A neglected one can quickly become an expensive project.

Disclaimer

This guide provides general information based on practical experience and industry knowledge. Construction methods, safety regulations, maintenance requirements and running costs vary between countries, climates and individual properties. Always seek advice from qualified pool contractors, surveyors and local professionals before purchasing a property with a swimming pool.

Help Us Build Better Property Guides

We're continually expanding our Property Guides to answer the questions buyers ask most.

If there's a topic you'd like us to cover, or you've learned something during your own property journey that could help other buyers, we'd love to hear from you.

Email: wayne@slidendoors.com

© Slide'N Doors – Helping You Open the Right Door.