Responsible declaration or licence: the paper that lets you start in the Valencian Community

Do you need a works licence to install solar panels?

Since Decree-law 14/2020, now folded into the Valencian planning law known as TRLOTUP, rooftop self-consumption installations on urban land are processed as a general rule with a responsible declaration: you file the technical documentation with the town hall, declare that you comply with the rules, and can start the works without waiting for a resolution.

The nuance almost nobody explains: a responsible declaration is not a blank cheque, it is a responsibility. What is declared must be true and backed by serious technical documentation, because the town hall can verify it afterwards. That is why a qualified professional signs it, and why the file is prepared as thoroughly as if it were a licence.

When does the procedure change to a licence?

The responsible declaration is the rule; these are the exceptions we have met in the area:

• Listed or protected buildings, or those within a heritage site's protection area: the procedure can switch to a licence or require a heritage authorisation. In comarcas with castles and historic centres, it is more common than it seems.
• Non-developable land: the rules change and the case must be studied before promising anything.
• Structural implications: if the installation needs reinforcement or touches the structure, some town halls ask for more.
• Municipal by-laws of their own: some local councils have a specific solar ordinance adding conditions or documents to the general regime.

What documents go into a responsible declaration?

A serious responsible declaration carries a technical report or project depending on power, an itemised budget, and in many municipalities a basic health-and-safety study because it is work at height. Every town hall has its quirks: some have a dedicated online procedure for solar, others work through a general application, and ICIO fees and rebates change from one municipal boundary to the next.

That municipal variation is exactly our specialty: this site's municipality pages show what we have found in each one, and in the file we apply it for you. The goal is always the same: the day the crew climbs onto the roof, the paper is already where it needs to be.

The mistakes that get a file stuck

The responsible declaration regime works well when the paperwork submitted is the right paperwork. The hold-ups we see almost never come from the rules themselves, they come from details: using another town hall's form because it came up first in a search, filing without the technical documentation the municipality asks for, or forgetting the self-assessment of the fee or the construction tax where the local ordinance requires it. Every town hall in the comarca has its own form and its own tax ordinance, and they are not interchangeable.

The most expensive mistake is a different one: declaring one installation and fitting another. If the paperwork states one power and the roof holds another, the inconsistency follows the whole file, from the industrial legalisation to the self-consumption registry, which is also a requirement for the regional tax deduction. Fixing it afterwards is possible, but it means redoing documentation and going back through the counter. It is avoided by something as simple as closing the design before filing anything.

And the Xàtiva classic: assuming the general regime applies across the whole municipality. For listed buildings or those under heritage protection, Valencian law allows a licence to be required instead of a responsible declaration. Checking the municipal catalogue before filing costs little; finding out through a formal requirement on the table costs considerably more.

What happens after the declaration is filed?

A responsible declaration is not a permit someone grants you: it is a responsibility you take on. The town hall does not review the file before you start; it keeps the power to check it afterwards, at any time. That is the deal: speed in exchange for what you declare being true. If a later check finds the installation does not match what was declared, there can be demands to rectify and even an obligation to restore, and the responsibility falls on whoever signed.

That is why it matters who signs and what gets kept. The engineer who drafts the documentation puts their signature behind yours, and the whole file, photos from before and after, certificates, drawings of what was actually built, is your defence if someone asks questions years later. Our way of working means leaving that file complete and handed over to the client, not sitting in an installer's drawer.

There is a side effect nobody talks about: checks are not always triggered by the town hall. Selling the house, a valuation, an insurance claim after a summer storm or applying for a tax deduction can all lead to someone asking for the installation's paperwork. On that day, the difference between a coherent file and one done in a hurry shows all at once.

Frequently asked questions