फ्लैट में बेडरूम और बालकनी हैं।

में means in or inside.

It comes after फ्लैट because Hindi uses postpositions rather than prepositions. So where English says in the flat, Hindi says फ्लैट में — literally flat in.

This is a very common pattern:

• घर में = in the house
• कमरे में = in the room
• बैग में = in the bag

और means and.

So:

• बेडरूम और बालकनी = bedroom and balcony

It simply joins the two nouns together.

हैं is used because बेडरूम और बालकनी are two things together, so the meaning is plural overall.

Compare:

• फ्लैट में बालकनी है। = There is a balcony in the flat.
• फ्लैट में बेडरूम और बालकनी हैं। = There are a bedroom and a balcony in the flat.

Even though bedroom and balcony are each singular by themselves, together they make a compound subject, so Hindi uses plural हैं.

Hindi often expresses this idea with a location/existence structure rather than a direct have/has verb.

So instead of saying:

• The flat has a bedroom and a balcony

Hindi says something more like:

• In the flat, there are a bedroom and a balcony

That is exactly what फ्लैट में बेडरूम और बालकनी हैं is doing.

This pattern is very common in Hindi when talking about what a place contains.

Hindi does not have articles like English a, an, and the.

So nouns often appear without any equivalent of those words:

• बेडरूम can mean a bedroom or the bedroom, depending on context.
• बालकनी can mean a balcony or the balcony, depending on context.

In this sentence, the most natural English translation uses a bedroom and a balcony, but Hindi itself does not need separate article words.

Usually, yes — the most natural understanding is a bedroom and a balcony, meaning one of each.

But Hindi is less rigid about this than English, because there are no articles. If you want to make one especially explicit, you can add एक:

• फ्लैट में एक बेडरूम और एक बालकनी हैं।

That makes the count clearer. Still, even without एक, the sentence is normally understood as listing one bedroom and one balcony.

They are common loanwords, borrowed from English and written in Devanagari.

So:

• फ्लैट = flat / apartment
• बेडरूम = bedroom
• बालकनी = balcony

Modern Hindi uses many everyday English loanwords, especially for housing, technology, transport, and city life. This is completely normal.

Some Hindi nouns change form before postpositions, but not all of them.

For example, many masculine nouns ending in -ा change in the oblique form:

• लड़का → लड़के
• लड़के में = in the boy

But फ्लैट is a loanword ending in a consonant, so it usually does not show a visible change:

• फ्लैट में

So the form stays the same.

This is a very natural Hindi sentence order for stating what exists somewhere.

The structure is:

[place] + [things] + है/हैं

So:

• फ्लैट में = in the flat
• बेडरूम और बालकनी = bedroom and balcony
• हैं = are

Literal order:

• In the flat, bedroom and balcony are

That may sound unusual in English, but it is normal in Hindi.

हैं is pronounced roughly like hain, but the final sound is nasalized, not a strong English n.

A rough learner-friendly guide:

• है ≈ hai
• हैं ≈ hain / hẽ

In normal speech, the nasalization matters more than saying a full n sound. So try to hear it as a nasal vowel rather than as a hard final consonant.