Price of a septic tank

A septic tank must be installed if your home is not connected to the city’s sewer system. Here are the different types and the cost to expect.

Going to the toilet, washing the dishes or taking a shower are actions of everyday life that have become so simple that we often forget all that they involve in terms of accommodation and connection.

When buying a home, and in particular a house, it is important to check whether it is connected to the sewer network of the municipality or city on which it depends. If so, then there is no need to worry. The wastewater evacuation network will take care of transporting them to the treatment plant and treating them in order to sanitize them.

But if this is not the case, the houses must be equipped with a personal sanitation system . This takes the form of a septic tank whose installation and maintenance is entirely the responsibility of the owners. This situation generally arises in sparsely urbanized areas, where municipalities have no economic advantages in installing this type of network.

Une fosse septique doit être installée si la ville ne prend pas en charge l'évacuation des eaux usées.

Get several free quotes now for the installation of a septic tank by professionals and compare them

Une fosse septique nécessite un entretien régulier.

As we said before, septic tanks need to be emptied on a regular basis: every 2 to 4 years depending on the size of the tank. It is important to carry out this operation when the accumulated sludge represents 50% of the total volume of the pit , so as not to have any problem due to the accumulation of gases released by it. It is recommended that this operation be carried out by an approved emptier. The prices of the latter vary between 150 and 300 € .

Likewise, it will also be necessary to regularly change the filters which allow grease retention.

The installation of a septic tank

Properly installing a septic tank is a complex process . This one must respect important constraints and follow very strict standards. Consequently, it cannot be carried out by an individual and must be carried out by a professional in the sector.

What cost to expect?

The cost of installing a pit can be estimated at around 4,000 to 8,000 € . Do not hesitate to request several quotes from companies near you. Also ask about their previous experience and facilities.

Despite the little technical complexity of the work necessary for its installation, this price can be explained by various factors.

For example, it will probably be necessary to use earthmoving equipment to prepare the ground that will receive the tank. This is because the pit must be installed in a hole one and a half times larger than the size of the tank. Then, if you have chosen a concrete pit, for reasons of weight and scope, you will have to resort to machinery that will allow you to move it easily. You will also need to make sure that they can access the land.

In addition, it is mandatory to comply with draconian standards regarding the installation of an individual sanitation system . Finally, you will also have to buy all the equipment necessary for the connection and the complete installation of the system: draining, spreading, filters, ventilation, etc.

When laying your pit, you will also need to prepare the ground once the hole has been dug. It will be necessary to line the ground with gravel, sand and geotextile fabric in order to be able to carry out the second part of the sanitation: the spreading of water. These will be filtered by the ground thanks to this installation before setting out again in nature.

Advantages of installation by a professional

Despite the price that may seem high, installation by a contractor or a professional company will allow you to benefit from certain guarantees.

For example, you will have a ten-year guarantee for your installation. In addition, you may be able to benefit from 10% VAT , and even a zero rate loan .

Additional costs to be expected

As we have said, the installation of an individual sanitation device is an expensive operation, but mandatory.

When you realize your budget, you will have to take into account the costs of material (device, connection and all equipment), installation, maintenance. But, in addition to all this, you will also need to plan for additional costs:

  • A sanitation diagnosis made by the Public Service for Non-Collective Sanitation (SPANC): this has an average cost of € 85 . However, it can vary greatly from one zone to another and can range from a free service at a cost of 150 €.
  • A soil study : this will cost between 200 and 500 € .
  • SPANC checks : they are to be carried out every ten years at most after installation of the pit. You will need to count on average 186 € , but this will again depend on your area.

Do not hesitate to go and get information from professionals in your region to request installation quotes, talk about the advantages you can benefit from and compare the prices offered.

Likewise, check with your town hall and SPANC to find out about the constraints, procedures and standards to be respected so as not to have any surprises.