Vive en el séptimo piso.

Spanish often omits subject pronouns because the verb ending already shows the person and number.

Here, vive is the third-person singular form of vivir, so the subject can be understood as:

• he lives
• she lives
• you live (formal usted)

So Vive en el séptimo piso is a complete sentence even without a written subject.

Vive is the present tense, third-person singular form of vivir (to live).

The present-tense forms are:

• yo vivo — I live
• tú vives — you live
• él / ella / usted vive — he / she / you (formal) live(s)
• nosotros vivimos — we live
• vosotros vivís — you all live
• ellos / ellas / ustedes viven — they / you all live

So in this sentence, vive matches a singular subject such as él, ella, or usted.

En is the normal preposition for location in Spanish. Here it means in or on, depending on how natural English expresses the idea.

So:

• vive en Madrid — lives in Madrid
• vive en una casa — lives in a house
• vive en el séptimo piso — lives on the seventh floor

Even though English often says on the seventh floor, Spanish uses en.

Spanish usually uses the definite article with this kind of expression: el séptimo piso.

That article is part of the noun phrase:

• el piso — the floor
• el séptimo piso — the seventh floor

English sometimes drops the in certain contexts, but Spanish normally keeps it here.

Because séptimo has to agree with piso.

• piso is masculine singular
• so the ordinal adjective must also be masculine singular
• therefore: séptimo

Compare:

• el séptimo piso — the seventh floor
• la séptima planta — the seventh floor

Both can mean the same thing, but the adjective changes to match the noun.

Because séptimo is stressed on the third-to-last syllable: sép-ti-mo.

Words stressed on the third-to-last syllable in Spanish are called esdrújulas, and they always take a written accent.

So the accent is not optional; séptimo must be written with é.

In this sentence, piso means floor or storey of a building.

In Spain, piso can also mean flat/apartment, so learners sometimes get confused. The meaning depends on context.

Here, because it is combined with an ordinal number — séptimo piso — it clearly means the seventh floor.

Yes. Planta is another common word for floor/storey.

So these can both be used:

• el séptimo piso
• la séptima planta

Both are correct, though the preferred wording may vary by region or context. In Spain, both are understood.

Its most direct meaning is he/she lives on the seventh floor.

Depending on context, that naturally implies that the person’s home is on that floor, but the sentence itself is about the floor level, not specifically the apartment number.

If you wanted to be more specific, Spanish could say something like:

• Vive en un piso del séptimo — He/She lives in an apartment on the seventh floor.
• Vive en el apartamento del séptimo piso — He/She lives in the apartment on the seventh floor.

The normal, natural order is el séptimo piso.

Spanish ordinals usually go before the noun in expressions like this:

• el primer piso
• el segundo piso
• el séptimo piso

A form like piso séptimo would sound unusual in everyday Spanish.

Not always. This is an important cultural detail.

In Spain, the street-level floor is usually la planta baja or el bajo, and the floor above that is el primer piso.

So if you are used to British English, where first floor is one level above the ground floor, that matches Spain fairly well.

If you are used to American English, where first floor is the street-level floor, then Spanish floor numbering may feel one level higher than expected.

So séptimo piso in Spain is typically the seventh level above the ground floor.

Usually, the most natural English translation is lives on the seventh floor.

Spanish uses en, but English normally uses on with floors:

• on the first floor
• on the seventh floor

So even though en often means in, here on is the better English choice.