Setting up natural gas correctly is essential both in new build properties and in second-hand flats where the service has been disconnected. Knowing each step will allow you to plan ahead and organise the process so your home is fully functional from day one without any surprises.

Before you begin: does your home have an active gas supply, or has it never had one?

The first step is to check the current status of your supply point. Requesting a new natural gas connection for a house that already has the infrastructure is not the same as requesting one for a property that has never had the service.

If it had gas before → reactivation only

If the property previously had a supply, the process usually involves a reactivation. If it was disconnected less than a year ago, the periodic inspection (carried out every 5 years) simply needs to be in date. If, on the other hand, more than five years have passed, it will be considered a new connection.

If it never had gas → new installation + setup

For new build properties or homes that have never contracted this service, the first requirement is to carry out the internal installation and the mains connection, so your house can connect to the distributor's network. This work must be carried out by an authorised installer.

How to find out who your distributor is

The distributor is the company that owns the infrastructure in your area, and you cannot choose them:

• Madrileña Red de Gas: Community of Madrid.

• Gas Extremadura: Extremadura.

• Nedgia: Galicia, Castile and León, Andalusia, Navarre, La Rioja, Castilla-La Mancha, Valencian Community, and Catalonia.

• Redexis Gas: Aragon, Murcia, and the Balearic Islands.

• Nortegas: Basque Country, Asturias, and Cantabria.

Identify the one corresponding to your Autonomous Community so they can validate the safety of your installation.

Step 1: Gather the necessary documentation

So that the process of setting up your gas supply is not delayed any longer than necessary, have the required documentation ready for whichever company you choose.

Account holder's ID (DNI)

It is essential to provide the full name and the NIF or NIE of the person who will be responsible for the contract.

Deeds, tenancy agreement, or authorisation

You must prove your right to use the property, either through the title deeds or a valid tenancy agreement.

Gas CUPS code

The Universal Supply Point Code (CUPS) is like the 'ID card' for your installation. It is a code consisting of 20 to 22 characters that identifies the supply point, not the person responsible for the contract. If the property previously had gas, you can find the CUPS on an old bill; if it is a new build, your distributor will provide it.

Gas Installation Certificate (CIG), if applicable

The Gas Installation Certificate (CIG) is the document issued by an authorised technician guaranteeing that the installation complies with current regulations. It is mandatory for new connections or if the supply has been disconnected for at least 2 years.

Certificate or up-to-date inspection

Ensure that the mandatory 5-year periodic inspection has not expired, as this is an essential requirement for the distributor to authorise the gas flow.

Step 2: Contact the company you want to contract your gas with

Once you have your documents ready, you can contact your preferred energy company. Unlike the distributor, here you can choose the company, such as Endesa, and also choose between the deregulated market and the regulated market (TUR).

What details will they ask for?

The company will request:

• The CUPS code (as mentioned above, you can find it on an old bill).

• Your exact address.

• Your personal details.

• A bank account for direct debit payments.

Choosing a tariff based on usage (DHW, cooking, heating)

A necessary step is to pause and choose the tariff that best suits you.  The first thing you need to know is the access tariff you require. The access tariff, or standing charge, is the price you pay to use the infrastructure and will depend on how much gas you need to consume at home; whether you only use gas for domestic hot water (DHW) and cooking, or if you also have heating.

Contracting a higher capacity than you actually need can result in a more expensive standing charge. To prevent this, you should estimate your annual consumption so the distributor assigns you the appropriate access tariff.

• If you only use DHW: Your consumption will be low, usually under 5,000 kWh/year. The recommended tariff is RL.1.

• If you use a gas cooker + DHW: This generally falls under the RL.1 tariff due to the low consumption of the hobs.

• If you have gas heating: Your consumption could exceed 5,000 kWh/year. Here, RL.2 is usually applied. It will also depend on the size of your property. 

   

Step 3: The distributor validates the installation

Once the gas tariff is contracted with your chosen energy company, they will send the request to the distributor in your area, who must give final approval.

What does the distributor check?

After the request is made, a technician from the distributor will visit your home to carry out safety checks, verifying both the pipework and the condition of the installation. They must also ensure that ventilation is correct and that rooms with gas appliances (such as boilers and cookers) comply with regulations to prevent accidents.

When is a new CIG required?

If the installation has undergone significant modifications or if the supply has been inactive for more than a year, the distributor will require a new certificate issued by an installer.

What happens if the installation is deemed unfit?

If any anomalies are detected, the technician will not install the meter and the connection will be put on hold until the faults are rectified and a new certificate is issued.

Step 4: Payment of registration and extension fees

Unlike other administrative processes, setting up gas is not free. The amounts are regulated by law and are paid through the first bill you receive from your supplier.

Setup fees

These cover the receipt of the certificate, the inspection, meter installation, and verification. The cost varies depending on your Autonomous Community and the access tariff (RL.1, RL.2, etc.).

Connection/extension fees

These are paid for the infrastructure required to bring the gas to your home. They are standard flat rates across Spain for private consumers.

Step 5: Activation of the supply

This is the final step to enjoying the service in your home. The usual timeframe is around 5 to 7 working days, once all documentation is correct and the installation has been validated.

Technician visit, if necessary

If there is no meter, a technician must visit to install it and seal the installation, making it operational.

When you receive your first bill

Your first bill will arrive between 1 and 45 days after activation if you are billed monthly, or up to 75 days if billed bi-monthly. The registration and connection fees will be itemised on this bill.

How much does it cost to set up gas (2026)?

Taking into account both the registration and connection fees, the total price for a new connection usually ranges between €200 and €235, depending on each region.

Cost for setup fees

These depend on the Autonomous Communities. For example, in Andalusia, the cost for a basic tariff (RL.1) is around €72, whereas in Galicia it can rise to €106.89.

Cost for connection fees

The applicant's connection fees are paid to build the connection between the distributor's network and your installation. It is calculated using the following formula:

104.20 × (L-6)

L = Connection length [m]

Meanwhile, the account holder's connection fees are paid to the distribution company the first time you register your supply point or if the gas has been disconnected for more than 5 years.

The price depends primarily on your access tariff:

• €106.34: under 15,000 kWh/year

• €244.40: between 15,000 kWh/year and 50,000 kWh/year

• €488.83: over 50,000 kWh/year

Cost of inspection or CIG (if applicable)

If you need a private installer to obtain the gas installation certificate, the price is not regulated and will depend on the professional you hire.

How to estimate your annual consumption

To estimate the annual gas consumption in a property, the most reliable method is to review bills from previous years, as they show your actual historical consumption. With that data, you can easily calculate your annual estimate.

If you don't have bills yet, you can make an estimate based on the square metres of the property, taking into account the gas-consuming appliances and the number of people living there. In homes with two to four people, typical consumption is usually between:

• 7 and 9 m3 of gas per square metre per year if only used for heating.

• 10 and 12 m3 per square metre if also used for domestic hot water (DHW).

You can convert these values into kWh by multiplying them by 10.3, though these will always be approximations because actual consumption depends on factors like insulation, property type, or your usage habits.

Setting up gas if you are an Endesa customer

If you decide to contract a gas tariff with Endesa, the process can be done 100% online or over the phone.

Details requested by Endesa to process the connection

Like any other company, at Endesa you will need to provide your CUPS, ID (DNI), bank account, installation certificate, and exact address.

How to track the process

Through the Customer Area or the Endesa app, you can check the status of your request.

Tools to understand your consumption (InfoEnergía)

With InfoEnergía, you will have total control over your consumption, with access to detailed information so you can easily understand your bills. It is a free and exclusive tool for Endesa customers. Log in to:

• Find out how much your household appliances consume and how the cost is broken down in euros.

• Simulate the savings you would achieve if you swapped them for more efficient ones.

• See how efficient you are compared to neighbours with similar setups.