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Solar panels in Castelló (Villanueva de Castellón)

We install solar panels in Castelló (Villanueva de Castellón) with a genuine study first: the sunlight your roof actually gets and your hour-by-hour electricity use. We do the installation and the paperwork with the council and the regional industry department. We are engineers based in Xàtiva and, once the system is in, we stay: we check your production every day.

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Local tax reductions in Castelló (Villanueva de Castellón)

The council in Castelló (Villanueva de Castellón) takes a share off its taxes if you install solar panels. Claiming the reduction is included in our permits and legalisation service.

75% off the ICIO

The tax on the works, paid when you install.

Requirements: Bonificación por instalaciones de energía solar del art. 2.3 de la ordenanza del ICIO (BOP núm. 21, 01-02-2022), en aplicación del art. 103.2.b TRLRHL: 75% de la cuota íntegra para instalaciones, construcciones u obras que incorporen sistemas de aprovechamiento de la energía solar o eólica, homologadas por técnico oficial competente, respetando la normativa urbanística vigente y solo para uso individual o familiar. La misma ordenanza recoge aparte una bonificación del 95% para las actuaciones en edificios catalogados o incluidos en la zona delimitada como Nucli Històric Tradicional, incluidas las actuaciones puntuales de mantenimiento y mejora de fachada y cubierta, previo informe de los Servicios Técnicos municipales.

Source: https://castello.sedelectronica.es/preview-document/841f1f18-d744-4448-8bd0-e88a58082e90

Verified on 22 August 2026

Income tax deductions do not depend on your council: grants and deductions 2026.

The council procedure in Castelló (Villanueva de Castellón)

In Castelló (Villanueva de Castellón) it goes through a responsible declaration: the documentation is filed with the council and there is no need to wait for a licence decision. We file it for you, along with the rest of the paperwork until the installation is fully legalised.

Castelló has its own municipal ordinance for grid-connected solar self-consumption installations, from December 2025, with two numbered forms: U303, the declaración responsable for the installation, and U304, the declaración responsable for the installer company. The ordinance channels solar power through a declaración responsable under art. 241 of the TRLOTUP, with a technical report and no full project below 10 kW, and a signed-off project above that. It requires a building licence, however, for installations within the Nucli Històric Tradicional, in the heritage protection zone, or on any property with heritage protection. Roofs on homes or businesses built irregularly are handled together with the licencia de minimización (a licence to reduce a planning breach), and where that route is not available, the installation cannot go ahead.

What we charge for filing that procedure is published: the price of the council procedure in Castelló (Villanueva de Castellón) and of the ICIO reduction application.

Frequently asked questions in Castelló (Villanueva de Castellón)

How much does Castelló discount the ICIO for fitting solar panels?

75% of the full bill, for installations, construction or work that includes a solar or wind power system. The ordinance sets three conditions: certification by a qualified official professional, compliance with current planning rules, and use for a single household or family.

Does Castelló have its own solar ordinance?

Yes, and it is recent: the ordenanza reguladora de las instalaciones solares fotovoltaicas de autoconsumo conectadas a la red, from December 2025. It channels installations through a declaración responsable, under article 241 of the TRLOTUP, and splits what is asked for according to the capacity you plan to fit.

What changes if my installation goes over 10 kW?

Below 10 kW, a technical report is enough, with no full technical project needed. Above that, you need a project signed by a qualified professional and endorsed by the professional body, or failing that, the professional's own declaración responsable. An ordinary home almost always falls into the first case.

My house is in the Nucli Històric Tradicional. Can I fit panels?

Yes, but not through a declaración responsable. The ordinance requires a building licence for installations within the Nucli Històric Tradicional or the heritage protection zone, and also for any property with heritage protection. That procedure takes longer, so it is worth starting it early.

What forms does Castelló town hall ask for?

Two separate, numbered declaraciones responsables: U303, for grid-connected self-consumption solar installations, and U304, for the installer company fitting the self-consumption panels. Both are published on the municipal website, and we file them for you with the rest of the case.

And if the house was built without a licence?

The ordinance addresses this directly. Roofs on homes or businesses built irregularly are handled together with the licencia de minimización (a licence to reduce a planning breach), and if that licence was already obtained, the solar installation can go through a declaración responsable. Without that route open, it cannot go ahead.

What we do in Castelló (Villanueva de Castellón)

The study of your roof and your hour-by-hour usage, the installation, and the paperwork with the council, the grid operator and the regional industry department (Industria). How we size a system and which warranties go in writing is in solar panels with a proper study; what we file with each body, in permits and legalisation.

The rest of what we do in Castelló (Villanueva de Castellón)

We climb onto a roof in Castelló (Villanueva de Castellón) for the panels and, while we are there, we handle what hangs off them:

Where else we work in Ribera Alta

Each village next to Castelló (Villanueva de Castellón) has its own page, with its own ordinance and its own paperwork. These are the ones in Ribera Alta:

every municipality we cover

Start with the study

Tell us where your house in Castelló (Villanueva de Castellón) is and what you pay for electricity. We will tell you what we need to study your roof and your usage. No commitment and no salesman knocking on your door.

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A Captia Technology company. Qualified, chartered engineers.

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