Your boiler stops on a Friday evening in January. You open WhatsApp, stare at the screen, and realise you do not know the word for boiler. You do not know how to describe the fault, and you do not know whether to use tú or usted. You type something in English, delete it, try a translator, get something that looks wrong, and eventually send a message so vague that your landlord phones you, and now you are doing this live, unprepared, in a register you have never practised.
This is one of the most common real-life language failures for people living in Spain. Not in a restaurant and not in a classroom, but at home, about your home, with the one person whose cooperation decides whether you sleep warm.
The short answer
You need about twenty nouns, one grammatical construction and one template, and you need to know that the repair is not a favour. Article 21.1 of the Ley de Arrendamientos Urbanos requires the landlord to carry out the repairs necessary to keep the dwelling habitable, without raising the rent for doing so, with damage caused by the tenant as the exception.
That changes the message you are trying to write. Most learners spend their vocabulary on softening a request. The useful sentence is a clear report of a fault, a consequence, and a direct ask, in that order.
The construction that does most of the work
Spanish reports breakdowns impersonally. Not yo rompí la persiana but se ha roto la persiana. The thing broke; nobody is being accused, including you.
Se ha roto el grifo. Se ha roto la cerradura. Se ha estropeado la caldera. If your production still runs through English you will reach for the personal version, because English makes you the subject, and the personal version quietly implies you are responsible for the repair bill. One construction, and it is the highest-value item on this page.
The vocabulary, and it is a short list
The flat. El piso, which is the default in Spain rather than apartamento. El casero or la casera for the landlord in speech, propietario in the contract. El contrato de alquiler, and el alquiler for the rent itself. Los gastos or los suministros for utilities: luz, agua, gas, and la comunidad, the building association fee that covers the lift, cleaning and insurance and is sometimes included and sometimes not.
These are worth learning as a closed set rather than absorbing gradually, because the moment you need them is never a moment you can prepare in. Nobody has ever had a boiler fail at a convenient time, and the vocabulary is small enough that an evening covers the whole category permanently.
Things that break. La caldera, the boiler, and the single most valuable word in this note. La calefacción, the heating system itself, which is not the same thing. El grifo gotea, the tap drips. La persiana está atascada, the shutter is stuck, and every window in Spain has one. La cerradura, the lock. El enchufe, the socket. Hay una fuga de agua for a leak and una gotera for a drip from the ceiling. Hay humedad, damp, which is a perennial negotiation in older buildings.
Put together: Hola Carmen, te escribo porque se ha roto la caldera y no hay agua caliente desde esta mañana. ¿Podrías enviar a alguien a mirarlo? Gracias.
Notice how little of that is vocabulary. The nouns are two words long and the rest is structure: an opener, an impersonal report, a consequence and a request. Learners tend to invert the effort, hunting for the exact word for a boiler part and then attaching it to a sentence with no consequence and no ask, which produces a message the landlord reads as information rather than as something requiring a reply.
For urgency, add the reason rather than the adjective: es bastante urgente porque no tenemos calefacción y esta noche hacen dos grados. And when nothing happens, perdona que insista, pero llevo tres días sin agua caliente. That llevar plus time plus sin construction does two jobs at once, establishing duration and implying patience, and duration is the thing that matters if this ever escalates.
Which register
Open with usted and let them switch, which they usually will, immediately. Getting this wrong in either direction is cheap, and worrying about it is the most common reason a message does not get sent at all. Most landlord communication in Spain runs on tú once a relationship exists, so staying formal for months reads as coldness rather than courtesy. A management company is the exception: formal stays formal there.
Politeness lives in the verb rather than in extra words. ¿Podrías? rather than ¿puedes?, and sería posible rather than es posible. This is the same conditional and subjunctive machinery that carries hedging throughout Spanish, and it is why a learner with no subjunctive sounds blunt in exactly the situations where bluntness costs something.
What the contract actually says
You do not need to parse every clause, but four numbers are worth knowing because they decide whether you are stuck.
Two of those are commonly got wrong, so they are worth stating plainly.
The fianza is one month for a home. The statute sets one month for vivienda and two for uso distinto de vivienda, which means commercial and other non-residential leases. The widely repeated claim that furnished flats legally require two months is not what the law says. A landlord may ask for an additional guarantee, and that is a negotiation rather than the statutory deposit.
Repairs are an obligation, not a favour. Article 21.1 puts conservation of the dwelling in habitable condition on the landlord, without a rent increase for it, excepting damage the tenant caused. Knowing that does not change your vocabulary. It changes your tone, from apologising for the inconvenience to reporting a fault.
That shift matters more than it sounds, because tone is the thing a second language flattens first. A learner who is unsure of the words compensates by being extremely polite, and extremely polite reads, to a landlord deciding whose problem to deal with this week, as an issue that can wait. You are not trying to be curt. You are trying to sound like someone stating a fact, which is a register a lot of learners never get to because every sentence they build costs them enough effort to feel like an imposition.
The rest of the terms you will meet: prórroga for the automatic extension, preaviso for the notice period, actualización de la renta for the rent review tied to inflation, resolución del contrato for termination rather than anything to do with resolving, and desperfectos for damage, which is the word that will appear when you argue about the deposit.
Resolver is the false friend most likely to cost you something. Quiero resolver el contrato does not mean you want to sort out a problem with it. It means you want to end it, and saying that to a landlord you were hoping to negotiate with produces a conversation you did not intend to start.
The strongest case for keeping it in English
Worth saying, because plenty of people do exactly this and it works.
Landlords in Spain increasingly speak some English, particularly in cities with a lot of foreign tenants, and a translator on your phone will get the boiler is broken across in seconds. If the goal is hot water tonight rather than language practice, using every tool available is the correct move and there is no prize for suffering through it in Spanish.
There is also a real asymmetry of stakes. A misjudged sentence in a bar costs nothing. A misjudged sentence in a dispute about a deposit could cost a month’s rent, and choosing the language you argue precisely in is not cowardice.
Why it still repays twenty minutes
Two things the English route loses.
There is also something worth naming about the translator route specifically. Judith Kroll and Erika Stewart’s revised hierarchical model, reviewed in a critical assessment, describes the link between a second-language word and its meaning as weak early on and strengthened by use. Every message you compose in English and paste in is a rep for the detour rather than for the road you want.
The first is that written Spanish is the easy end of this. You have time, you can edit, and nobody hears you pause. If your Spanish is going to be built anywhere, a WhatsApp message with a template is the lowest-stakes production task available, which is exactly why the recognition-to-production ladder has written output as the rung below live speech.
The second is that the phone call is coming anyway. A vague message produces a call, and the call happens without preparation, at speaking speed, which is the hardest version of this encounter. Norman Segalowitz’s cognitive fluency is the constraint there, and a precise message is the cheapest way to avoid needing it.
There is also the avoidance trap. Elaine Schachter’s 1974 paper described learners routing around structures they distrust, and Martin Kleinmann’s follow-up found the predictor was confidence in the one structure rather than general ability. Here the dodge is not a simpler sentence, it is a colder flat for another week.
How to actually prepare
Twenty minutes, once, and it covers years.
Write your own version of the template with your landlord’s name in it and save it as a draft. Learn se ha roto as a fixed unit rather than as a grammar point. Learn the twenty nouns as a closed list, out loud rather than on a page: Laufer and Goldstein’s four degrees of word knowledge across 435 learners is the reason recognising caldera will not produce it, and Roediger and Karpicke’s test-enhanced learning work found retrieval beating review on any delayed test.
Keep it proportionate. Paul Nation’s four strands put deliberate study of a closed list at roughly a quarter of a balanced diet, so this is an evening, not a syllabus.
If it escalates past messages, the register changes again and so does the machinery: written complaints, dated proof, and the formal vocabulary covered in the gestoría and hoja de reclamaciones note.
What we do with this at Suelto
Vivienda is its own coverage area in Territory, with twenty probes across the basic and advanced bands, because this is a category where a socially fluent learner is routinely dark.
The scenarios are the encounter rather than the vocabulary list: report a fault, chase a non-reply, negotiate a deposit deduction. Register is scored separately from correctness, since ¿me arreglas la caldera? is not wrong and lands differently from ¿podrías enviar a alguien?, and register mismatch is invisible to the person producing it. The impersonal se is drilled as a unit because the English-shaped alternative is what arrives under pressure.
The gap test covers this practical register in about ten minutes with no signup, and the method page sets out the rest. The wider administrative vocabulary sits in the empadronamiento note.
Twenty nouns, one construction, one saved draft, and one article of the LAU. That is the whole kit, and it is the difference between asking somebody for a favour and telling them about a fault they are already obliged to fix.