Energy upgrades, solar and grants

It is for anyone considering, planning or carrying out a move to Spain, whether you own a home or expect to stay long term. You will come away able to rank upgrades, understand the Spanish solar rules and see where funding may apply.

Start with "Which energy upgrades pay off in a Spanish home". It shows where your money gives the most comfort and the quickest payback, so you can judge everything else against it.

From there, read the page that matches your plan:

• "How soundproof is your home, and what can improve it?" if street noise or thin walls are your problem.
• "Grants and tax breaks for energy upgrades in Spain" to see what funding exists and who qualifies.
• "Putting solar panels on your Spanish home (autoconsumo)" for how residential solar works, from surplus and batteries to registration, costs and permits.
• "Solar panels when you live in a flat" if the roof belongs to the community.

Key rules

• Surplus credit: Surplus energy is credited on your bill at the price your retailer offers, but the credit can never exceed what you pay for energy taken from the grid, so it cannot produce a payment.
• Simplified compensation limit: Simplified surplus compensation is available for renewable installations of 100 kW or less with a single supply contract.
• Access permit exemption: Installations of 15 kW or less on urban land do not need access and connection permits.
• VAT on works: VAT on energy works is 21%, or 10% for home renovation done for an individual where materials are no more than 40% of the price.
• Community vote for solar: Shared solar on a community roof needs a simple majority of owners at a meeting, and it must be approved before any work starts.
• Apply before works: Many grant calls require you to apply before works start or a contract is signed, so read the call before committing.

Energy upgrades, solar and grants: the whole process, step by step

• Check which upgrades suit your home and note your energy certificate rating (Which energy upgrades pay off in a Spanish home): First, before you ask for quotes or sign anything

• Find the grant calls open in your region and read their rules (Grants and tax breaks for energy upgrades in Spain): Before works start or any contract is signed, as many calls require you to apply first

• If you live in a flat, get the community vote for roof or facade work (Solar panels when you live in a flat): Before any work starts; shared solar on a community roof needs a simple majority of owners at a meeting

• Plan the solar installation, permits and surplus agreement with your retailer (Putting solar panels on your Spanish home (autoconsumo)): After any grant application is filed and before works begin; surplus compensation covers installations of 100 kW or less

• Apply to your town hall for the property tax (IBI) and construction tax (ICIO) reductions (Grants and tax breaks for energy upgrades in Spain): Within the deadline set in your town hall's ordinance; the IBI reduction usually lasts 3 to 5 years

• Finish the works and send in the completion paperwork for your grant: Typically 12 to 18 months from the award, and within the call's own end date

Documents you may need

Identity and residence

• Your ID or NIE — Grants and tax breaks for energy upgrades in Spain

The home and the lease

• Surplus compensation contract with your electricity retailer — Putting solar panels on your Spanish home (autoconsumo)
• Contract modification with your electricity distributor — Putting solar panels on your Spanish home (autoconsumo)

Payments and receipts

• Final invoices and proof of payment that can be traced through your bank — Grants and tax breaks for energy upgrades in Spain
• Your latest IBI receipt — Grants and tax breaks for energy upgrades in Spain

Other documents

• A quote or budget for the works — Grants and tax breaks for energy upgrades in Spain
• The energy performance certificate from before the works — Grants and tax breaks for energy upgrades in Spain
• Energy efficiency certificate — Which energy upgrades pay off in a Spanish home
• Technical project or technical memory — Putting solar panels on your Spanish home (autoconsumo)
• Low-voltage electrical installation certificate — Putting solar panels on your Spanish home (autoconsumo)

Each article lists the other documents it asks for, where you need them.

Energy upgrades, solar and grants: questions that cross several articles

Are energy grants still open for homeowners in Spain?

Many grants are closing or have closed, because the EU recovery funding behind most of them was ending in 2026. Which calls remain open depends on your region and town hall. Read Grants and tax breaks for energy upgrades in Spain to see how to find them.

Can I get a grant if I own a home in Spain but do not live there?

Generally yes, because eligibility depends on owning the property and the works, not on residency. You will need a Spanish tax number (NIE), proof of ownership and a Spanish bank account. Some calls only cover a main residence, so check the specific call in Grants and tax breaks for energy upgrades in Spain.

How much of the cost can a grant cover for upgrades or solar?

Earlier calls covered 40%, 65% or 80% of eligible rehabilitation costs, depending on how much energy demand fell, and about 15-45% for solar. Each regional call sets its own amounts. See Grants and tax breaks for energy upgrades in Spain, and Putting solar panels on your Spanish home (autoconsumo) for solar costs.

Do I need my neighbours' approval to change windows or put solar on a flat roof?

Often yes: changing the facade, or windows that alter its look, usually needs community approval, commonly by a three-fifths majority. Shared solar on a community roof needs a simple majority of owners at a meeting. Read Solar panels when you live in a flat, and Which energy upgrades pay off in a Spanish home for window work.

Where do I apply for an energy grant?

You apply to your autonomous community, usually through its housing or energy department, online with a digital certificate or Cl@ve. The regional call names the portal and method. Grants and tax breaks for energy upgrades in Spain explains the steps.