Air Conditioning & Your Rental in Spain
Your rights around AC installation, usage and costs
The current situation
Summers in Spain keep getting hotter. The last few years have brought record-breaking heatwaves, and for renters the question of air conditioning has gone from nice-to-have to genuinely important. But the legal situation around AC in Spanish rentals is surprisingly unclear, and renters regularly get caught out by unexpected costs, landlord disputes, and community rules they didn't know existed.
This guide covers your rights, your responsibilities, and how to avoid the most common and expensive mistakes.
Do you have the right to AC?
There is no automatic legal right to air conditioning in a Spanish rental. Unlike heating or hot water, AC is not considered essential for a property to be "habitable" under the LAU (Ley de Arrendamientos Urbanos).
However, if air conditioning is listed in your rental contract or the property inventory, that changes everything. Under Article 21 of the LAU, your landlord is obligated to maintain the property and its listed equipment in working order. That includes AC.¹ If the unit breaks down through normal use, your landlord has to fix or replace it. They cannot raise the rent to cover the cost.
The key word is "listed." If AC appears in your contract or inventory, you're covered. If it doesn't, you have no legal claim to it, even if there's a unit visibly mounted on the wall when you move in.
What to do:
Check your rental contract and inventory right now for any mention of air conditioning. (If you haven't signed yet, the rental contract checklist covers what else to look for.) (aire acondicionado, A/A, or similar)
If AC is listed and not working, notify your landlord in writing (email is fine) citing Article 21 of the LAU
If AC isn't listed but a unit exists in the property, ask your landlord to add it to the inventory before you rely on it
Keep a copy of your signed contract and inventory somewhere accessible
Installing AC yourself: harder than you think
If your rental doesn't have air conditioning, you might be tempted to install a unit yourself. This is where most renters run into trouble, because it's not just about your landlord's permission.
Your landlord
You need written permission from your landlord before installing any AC unit. Without it, the landlord can require you to remove the unit when you leave, restore the property to its original condition, and deduct the cost from your deposit.² Even a portable unit that vents through a window can cause issues if it damages the frame or facade.
The community of owners
Here's what catches most people off guard: even with your landlord's approval, you may still need permission from the building's comunidad de propietarios. Under Spain's Horizontal Property Law (Ley de Propiedad Horizontal), the building's facade is a common element. Installing an exterior AC unit on it requires approval from three-fifths of the owners at a formal community meeting.³
Some buildings have bylaws that ban exterior units altogether for aesthetic reasons. Others allow them but with restrictions on placement, appearance, and noise levels. Installing without this approval gives the community the right to demand removal and pursue legal action, even years after the fact.
Municipal rules
On top of all that, your local council (ayuntamiento) may have its own regulations about where exterior units can be placed, how much noise they can produce, and whether you need a permit. These vary by municipality, so check with your local town hall.
What to do:
Get written permission from your landlord before doing anything
Ask your landlord (or the building administrator) about the community's rules on AC installation
Check with your local ayuntamiento for any municipal requirements or permits
If the community or council says no, consider a portable unit that doesn't require exterior installation, but confirm with your landlord first
Running costs: what AC actually does to your bill
Air conditioning is one of the single biggest contributors to electricity bills in Spain. Even a modest split unit running a few hours a day in summer can add a noticeable amount to your monthly bill. But the real cost isn't just the electricity you consume. It's often the contracted power. (For a broader look at how energy pricing works in Spain and how to reduce your bill, see our guide to energy costs.)
Potencia contratada
Every electricity contract in Spain has a potencia contratada (contracted power level), measured in kilowatts. This determines the maximum amount of electricity your home can draw at any moment. You pay a fixed monthly charge for this capacity whether you use it or not.⁴
Most Spanish rental flats are set up with 3.45 kW or 4.6 kW of contracted power, which is enough for normal use. But when you turn on the AC alongside a few other appliances, you can easily exceed that limit, tripping the diferencial (circuit breaker). If this keeps happening, you may need to upgrade your contracted power.
Upgrading involves contacting your electricity provider, and there's typically a one-time fee. The fixed monthly charge will also go up since you're paying for more capacity. But it beats having your power cut out every time you run the AC and the oven at the same time.
One important question: who pays for this? If AC is listed in the property inventory, you could argue the landlord should have ensured adequate power capacity. If you installed the AC yourself, the cost is almost certainly yours.
Timing matters
Just like with every other appliance, running your AC during off-peak hours (valle) is significantly cheaper than during peak hours (punta) under Spain's PVPC tariff. The off-peak window runs from midnight to 8:00 AM and all day on weekends and public holidays.⁵ Cooling your flat down late at night and then keeping the shutters closed during the day is one of the most cost-effective strategies.
What to do:
Check your electricity bill for your current potencia contratada
If the diferencial trips frequently when you use the AC, contact your comercializadora about upgrading
Run the AC during off-peak hours (midnight to 8 AM, weekends) whenever possible
Use the AC's timer function to cool the flat before you wake up or before you get home, rather than running it all day
Set the temperature to 25-26°C. Each degree below that increases energy use by around 7%.⁶
Maintenance: who does what
Maintenance responsibilities follow the same logic as the rest of the LAU. The landlord handles the big stuff, the tenant handles the small stuff.
Landlord's responsibility
Under Article 21 of the LAU, the landlord is responsible for repairs needed to keep the property in habitable condition.¹ For AC, that means compressor failures, refrigerant leaks, electrical faults in the unit, and any structural issues with the installation. If the unit was there when you moved in (and is listed in the inventory), the landlord pays for these repairs.
Tenant's responsibility
Article 21.4 of the LAU assigns "small repairs caused by ordinary wear and tear" to the tenant.¹ For AC, that means cleaning or replacing filters, keeping the unit free of dust and debris, and basic upkeep like clearing drainage channels. (For the full breakdown of how this division works across all types of repairs, see our guide to small repairs.) Neglecting routine maintenance could shift liability to you if the unit breaks down as a result.
When something breaks
If the AC stops working and it's not your fault, notify your landlord in writing immediately. Be specific: describe the problem, state that the unit is listed in the inventory, and request repair within a reasonable timeframe. For essential cooling during extreme heat, 48 hours is a reasonable ask. Keep a copy of all communications.
If your landlord doesn't respond or refuses to repair, you have options under the LAU, but taking matters into your own hands (hiring a repair person and deducting it from rent, for example) is risky without legal advice. Document everything and consult before acting.
What to do:
Clean your AC filters at least once a month during summer
Check that the drainage channel isn't blocked (a common cause of leaks and reduced performance)
If the unit breaks down, send your landlord a written notice describing the issue and requesting repair
Keep copies of all communications in case you need them later
Don't attempt major repairs yourself or hire someone without your landlord's written agreement
The real point
Air conditioning in a Spanish rental involves more layers than most renters expect: your contract, your landlord, the building community, the local council, and your electricity setup all play a role. But most problems come from the same place: not knowing what's in the contract and not getting things in writing.
Check your contract, communicate in writing, and understand what your electricity setup can handle. That covers most of it.
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If you're not sure where you stand, Rent AI can help you understand your specific rights and figure out next steps.
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Sources
Ley 29/1994, de 24 de noviembre, de Arrendamientos Urbanos (LAU), Articles 21 and 21.4 - Conservation and maintenance obligations. BOE.
LAU, Article 23 - Tenant works requiring landlord consent. BOE.
Ley 49/1960, de 21 de julio, sobre Propiedad Horizontal (LPH), Article 17 - Community voting thresholds for modifications to common elements. BOE.
CNMC - Estructura de peajes de acceso y cargos del sistema eléctrico.
Red Eléctrica de España - Franjas horarias del PVPC (esios.ree.es).
IDAE (Instituto para la Diversificación y Ahorro de la Energía) - Guía Práctica de la Energía: recommended AC settings and energy impact.
