Installing an in-ground swimming pool
As well as being a source of recreation, in-ground pools add a touch of luxury to a home. They blend harmoniously into a garden. They allow you to cool off during the hot summer months, get some exercise and create a convivial space for family and friends.
Types of in-ground pools
In-ground concrete pool
Concrete pools have a very long life expectancy and offer great design flexibility. These pools are built using wooden or metal formwork to form the structure, which is then filled with concrete. Once the concrete has hardened, the surface can be finished with plaster, tiles or other decorative materials. Concrete pools can be used to create custom shapes and complex designs.
Average construction cost : The cost of building a concrete swimming pool can vary considerably depending on the size, complexity of the design and finishes chosen. On average, the cost is between €15,000 and €30,000.
Maintenance and associated long-term costs : Maintenance of concrete pools requires regular attention to maintain their appearance and functionality. The plaster or tile lining must be cleaned regularly to prevent the build-up of algae and mineral deposits. Concrete pools may require resurfacing every 10 to 15 years, which can cost between €5,000 and €10,000. Annual maintenance costs, including chemicals, cleaning and minor repairs, can be around €1,000 to €2,000.
In-ground vinyl pool
Vinyl pools are very popular because they are relatively inexpensive and quicker to install than other types of in-ground pools. These pools use a steel, aluminium or polymer structure to which a vinyl liner is applied. The liner is available in a range of colours and patterns, allowing for aesthetic customisation. Vinyl pools are generally rectangular, but more complex shapes are also possible.
Initial cost of installation : The cost of installing a vinyl pool is often lower than that of concrete or fibreglass pools. On average, it varies between €10,000 and €20,000.
Service life and maintenance costs : The lifespan of a vinyl pool depends mainly on the quality of the liner and regular maintenance. In general, a vinyl pool liner should be replaced every 7 to 10 years. Replacing a liner can cost between €2,000 and €5,000. Annual maintenance costs can vary between €800 and €1,500.
In-ground fibreglass pool
Fibreglass pools are manufactured from a factory-prefabricated mould and delivered in one piece to the installation site. Their surface is smooth and non-porous, which reduces the formation of algae and makes cleaning easier. Fibreglass pools are also highly resistant to cracking and deformation. They are available in a wide variety of shapes and sizes.
Cost of installation : The installation of a fibreglass pool is generally quicker and less expensive than that of concrete pools, but more expensive than that of vinyl pools. The average cost is between €12,000 and €25,000.
Comparison of maintenance costs with other materials : Fibreglass pools require less maintenance than concrete or vinyl pools. Annual maintenance costs are generally between €500 and €1,000.
Stainless steel in-ground pool
Advantages of using stainless steel : Stainless steel in-ground pools are robust and corrosion-resistant. This material can withstand a wide range of climatic conditions without deteriorating. Stainless steel gives your pool a modern, elegant look.
Installation costs and longevity : Stainless steel pools are generally more expensive to install than other types of in-ground pools, due to the high cost of the material and the complexity of the construction. The average cost is between €25,000 and €50,000. However, the exceptional longevity of stainless steel goes some way to offsetting this high initial investment.
Maintenance costs : Stainless steel pools require less maintenance than other materials. The smooth, non-porous surface of stainless steel reduces the build-up of dirt and debris. It does not require resurfacing or liner replacement. Annual maintenance costs are low, at between €300 and €800.
Wooden in-ground pool
Wooden pools are appreciated for their natural aesthetics and their ability to blend harmoniously into outdoor environments. The wood used for these pools is treated to resist moisture and the elements. Wooden pools come in a variety of shapes and sizes, and provide a visual warmth and rustic elegance that perfectly complement landscaped gardens and green spaces.
Initial cost and maintenance costs : The initial cost of a wooden pool can vary depending on the quality of the wood and the complexity of the design. On average, the cost is between €10,000 and €25,000.
Durability and specific constraints : Wooden pools require regular maintenance to maintain their appearance and functionality. Wood must be treated periodically to prevent damage caused by water, insects and fungi. Wooden pools can be more sensitive to extreme weather conditions. Annual maintenance costs vary between €500 and €1,500.
In-ground swimming pool kit
Swimming pool kits are prefabricated pools supplied with all the components needed for installation. They are easy to assemble, so you can do it yourself or with the help of professionals. The kits include a steel, aluminium or resin structure, a vinyl liner, a filtration system and the necessary accessories. Swimming pool kits are practical and relatively economical - a real in-ground pool without the high costs and construction time associated with traditional pools.
Purchase and installation costs : The purchase price of a kit pool is often lower than that of other types of in-ground pool. A kit costs between €5,000 and €15,000. Installation, if carried out by a professional, can add a further €2,000 to €5,000.
Advantages and disadvantages in terms of cost and maintenance : Kit pools offer a number of advantages. Apart from their lower initial cost and the possibility of customisation, they can be installed relatively quickly and offer great flexibility in terms of design and size. Their main weakness is that they have a shorter lifespan than concrete or fibreglass pools. Annual maintenance costs can vary between €800 and €1,500.
In-ground mini pool
Mini pools are small in-ground pools of between 10 and 20 square metres. They are ideal for small gardens. Mini pools offer all the advantages of larger pools, but in a smaller format. Perfect for relaxation, children's water games or even exercise with counter-current swimming systems, the compact size of mini pools means that construction and maintenance costs are reduced.
Construction and maintenance costs : The cost of building a mini pool is lower than that of standard-sized pools, because of their smaller size and the smaller quantity of materials required. They cost between €7,000 and €15,000. Annual maintenance costs vary between €500 and €1,000.
Adaptability and growing popularity : Sales of mini-pools are exploding, particularly in urban areas where space is often limited. They are easy to fit into small spaces, and all at more attractive prices.
For more details on the cost of building and maintaining a swimming pool, see our section on swimming pool prices.
Building an in-ground swimming pool
Studying the site and obtaining permits
The geotechnical study enables you to understand the composition of the soil, the possible presence of rock or groundwater and the stability of the land. Once the study has been completed, you need to obtain planning permission from the local authorities. These permits will ensure that your building complies with local safety, environmental and planning regulations.
Pool planning and design : They help to define the characteristics of the pool and ensure smooth construction: determining the size, shape, depth and materials of the pool. The design must also take into account the integration of filtration, heating and lighting systems. Working with a specialist architect or designer helps to create the pool of your dreams: aesthetically pleasing and functional, while respecting your technical and budgetary constraints.
Construction stages
Earthworks and excavation : This involves removing the earth to create the space required for the pool. The process begins by marking out the location of the pool, followed by the use of earthworks such as diggers to excavate the ground. The depth and dimensions of the excavation depend on the specifications of the pool, including its shape and depth. Once the excavation is complete, the bottom of the pit is levelled and compacted to provide a solid base.
Installation of the structure and filtration systems : After excavation, the pool structure is installed. Next, the plumbing and filtration systems are installed: pipes, skimmers, return nozzles and filtration system.
Finishing and watering : The next step is to apply the finishing touches.
- Plaster, tiles or other coverings for concrete pools
- Liner installation for vinyl pools
- Fibreglass pools are factory-finished.
The surrounding coping and terraces are also installed at this stage.
You're almost there, the pool is filled with water and the filtration system is switched on to make sure everything is working properly. Water tests are carried out to check the chemical balance and guarantee safe swimming water.
See our dedicated section for all the stages in building a swimming pool.
Advantages and disadvantages of in-ground pools
Benefits
- In-ground pools blend in perfectly with your garden and add real character to your home.
- In-ground swimming pools, particularly those made of concrete and stainless steel, guarantee a long service life.
- An in-ground pool increases the resale value of a property. For many potential buyers, a well-designed and well-maintained pool is an attractive asset that can make the difference in the decision to buy.
Disadvantages
- One of the main disadvantages of in-ground pools is their high initial cost. Building an in-ground pool requires high-quality materials, specialised labour and a longer construction time than above-ground pools. Depending on the materials and customisation options chosen, the initial cost can represent an investment that some homeowners find hard to justify.
- In-ground pools require regular maintenance to keep the water clean and balanced and to ensure that the filtration and heating systems are working properly.
- Building an in-ground swimming pool is a complex process that can take from several weeks to several months, depending on the size, shape and specifications of the project. The complexity and duration of the project can cause temporary disruption to the construction site.
Above-ground pool or in-ground pool, you now have all the information you need to make the best choice!
