I want panels but my community doesn't: how to unblock it (and revalue the building)

It’s one of the problems we hear most: “I want to install panels but my homeowners’ community can’t agree”. Or worse: there’s flat opposition, fear of special levies, someone who “doesn’t care about the environment” or who has heard a thousand myths about structures and leaks.

If you’re the owner of a whole building, a real-estate investor or a property administrator, here’s something worth knowing before throwing in the towel: the law has changed and the business behind installing has changed too.

First: you no longer need unanimity

Many people still run meetings as they did 15 years ago. The legal reality in Spain today is this:

• The Horizontal Property Law / LPH (art. 17.5 LPH, after the amendment by Royal Decree-law 19/2021) reduces the quorum needed to install renewable-energy systems in common areas to a third of owners representing 1/3 of quotas.
• This applies both to the initial proposal and to agreeing on the distribution of costs and surpluses.
• If the installation is for individual use by an owner on their private part (their assigned roof share, or if the community cedes its use), it’s enough to notify the community — no agreement required.

Translated: you no longer need to convince 100 % of the building. You need to convince a third. And if you’re a sole owner of a building (or represent the majority of quotas), the deadlock disappears.

How to win votes that look lost

There’s a very clear pattern of which arguments work in meetings and which don’t:

What DOESN’T work

• “It’s good for the planet.”
• “The sun is free.”
• “It’s trendy.”

What DOES work

• “The building goes up a letter in the energy certificate.” Show a previous project with the simulated improvement (e.g. from E to C).
• “The monthly leasing fee is lower than the savings in common areas.” If the community pays for elevator, garage, stairwell, water pumps… the math usually works out and there’s no special levy.
• “It increases the sale and rental value of each apartment.” Real-estate portals already show the building’s energy letter.
• “We don’t touch the roof until the technical project certifies.” Removes the fear of leaks.

When an owner sees that it doesn’t come out of their pocket, that the market value of their apartment goes up and that there’s no structural risk, the debate ends.

The silent asset: going up an energy letter

Here’s the part almost no one tells properly. The Energy Efficiency Certificate (CEE) has been mandatory for selling or renting in Spain since 2013, and it’s public on every real-estate listing.

A properly sized photovoltaic installation typically raises one or two letters on the certificate. Going from E to C, or from D to B, isn’t cosmetic:

• In residential rental, a home with a better letter rents faster and 5-15 % more expensive (data varies by market, but the trend is consistent in recent INE and sector reports).
• In sale, the average buyer starts discounting price for low letters: an E or F penalises the negotiation. A B or A sells as an additional feature.
• In office buildings, the energy letter is already a filter criterion in many corporate searches (ESG).

Tax advantages: what may apply (check with your advisor)

Honest warning before continuing: taxation depends on your autonomous community, municipality, owner type and moment, and changes frequently. What follows are routes that exist today in Spain and should be reviewed with your tax advisor; they are not a blanket promise.

For individuals (Personal Income Tax)

Royal Decree-law 19/2021 (extended several times) recognises deductions in Personal Income Tax for energy-improvement works in primary or rented housing:

• 20 % if the work reduces ≥7 % of heating/cooling demand.
• 40 % if it reduces ≥30 % non-renewable primary energy consumption or moves the home to class A or B.
• 60 % for works in residential-use buildings that improve the overall energy rating.

There are annual caps and formal requirements (certificate before and after, invoices, etc.). Your advisor will confirm which one applies.

For full buildings and companies

• IBI (property tax) rebate: very many municipalities rebate between 25 % and 50 % for 3-5 years for properties with solar self-consumption. It’s municipal, so it varies between town councils.
• ICIO rebate (Tax on Construction, Installations and Works): up to 95 % in many municipalities for renewable installations.
• Next Generation EU subsidies (self-consumption, energy efficiency in residential buildings): still active with grants per kWp and per energy improvement. Managed by autonomous community.

For rentals

If you’re renting out the property as a primary residence, net returns may enjoy additional reductions in Personal Income Tax when the energy efficiency of the property is improved during the contract (article 23.2 of the IRPF Law, amended in 2024). Again: depends on the specific contract and moment.

The sole-owner or large-majority case

If you own the entire building (rental residential, offices, hotel) or have a crushing majority of quotas, all the community friction disappears. In that scenario the numbers usually look like this:

• No initial outlay: with AUREQIS leasing the plant is financed by the 10/15/20-year contract.
• The fee is paid by the savings themselves: with proper sizing, the balance is positive from the first month.
• The property’s value rises: from energy-certificate improvement and from the included solar asset (which will become property at the end of the contract).
• Operational taxation: deductible fee as an expense, not counting in CIRBE or consuming credit lines.

The next step, without getting bogged down

If you want to move the needle in your community or in your building, what we need is very little:

1. Drawing or photo of the roof (Google Maps satellite works).
2. Electricity bill for common areas (or several bills if there are separate contracts).
3. Current energy certificate of the building if you have it handy.

With that we put together a technical-economic dossier that you can take to the meeting: simulation of the energy letter before/after, expected monthly savings, leasing fee and comparison with the current bill. We present it for you if needed.

Request your free study and let’s start.