Ο τόπος κατοικίας είναι σωστός.

Ο is the Greek definite article meaning the for a masculine singular noun in the nominative case.

Here it goes with τόπος because τόπος is a masculine noun:

• ο τόπος = the place

Greek articles change depending on gender, number, and case, unlike English the, which always stays the same.

So:

• ο = masculine singular
• η = feminine singular
• το = neuter singular

Τόπος means place. In the phrase τόπος κατοικίας, it means place of residence or place where someone lives.

This is a fairly formal expression. You are more likely to see it in:

• official forms
• legal documents
• administrative language

In everyday speech, people might more often say something like:

• διεύθυνση = address
• πού μένεις; = where do you live?

So τόπος κατοικίας sounds more official than casual.

Because κατοικίας is in the genitive singular form.

The base noun is:

• η κατοικία = residence, dwelling

In τόπος κατοικίας, the second noun tells you what kind of place it is:

• τόπος κατοικίας = place of residence

This is a very common Greek pattern:

• noun + genitive noun

It often works like English of:

• ο τόπος της κατοικίας would literally be the place of the residence
• but Greek often uses just τόπος κατοικίας without another article in set expressions like this

So κατοικίας is the genitive form meaning something like of residence.

Because Greek often leaves out the article in this kind of compound or institutional phrase, especially in formal language.

So:

• ο τόπος κατοικίας is a standard formal expression

If you added an article, it would sound more specific in a different way:

• ο τόπος της κατοικίας = the place of the residence

That is grammatically possible in some contexts, but it is not the usual way to express the formal term place of residence.

This article-less genitive is very common in labels and official expressions.

Είναι is the 3rd person singular present of είμαι, meaning to be.

So:

• είναι = is

The subject is ο τόπος κατοικίας, which is singular, so Greek uses singular είναι.

Greek often omits subject pronouns like he, she, or it, but here the full subject noun phrase is stated:

• Ο τόπος κατοικίας είναι σωστός.
• The place of residence is correct.

Because Greek adjectives must agree with the noun they describe in:

• gender
• number
• case

The noun being described is τόπος, which is:

• masculine
• singular
• nominative

So the adjective must also be:

• masculine
• singular
• nominative

That is why it is:

• σωστός

Compare:

• ο τόπος είναι σωστός = masculine
• η διεύθυνση είναι σωστή = feminine
• το όνομα είναι σωστό = neuter

So the ending changes to match the noun.

It can mean correct, right, proper, or accurate, depending on context.

In this sentence, it means something like:

• correct
• valid
• right

So if this appeared on a form or in a system, it probably means that the residence information entered is correct.

This is a very common adjective in Greek.

It is natural Greek, but it sounds formal and bureaucratic.

A native speaker would understand it immediately, but in everyday conversation they might choose a different expression depending on what they mean.

For example:

• Η διεύθυνση είναι σωστή. = The address is correct.
• Ο τόπος διαμονής είναι σωστός. = The place of stay/residence is correct.
• Μένεις εκεί; = Do you live there?

So the sentence is perfectly fine, but it sounds like something from a form, database, or official statement.

Yes. Greek word order is more flexible than English word order, although not completely free.

The neutral order here is:

• Ο τόπος κατοικίας είναι σωστός.

You could change it for emphasis, for example:

• Σωστός είναι ο τόπος κατοικίας.

That might sound more marked or emphatic, something like:

• It is the place of residence that is correct.

In ordinary statements, the original order is the most natural.

A simple pronunciation guide is:

• Ο τόπος κατοικίας είναι σωστός
• o TO-pos ka-ti-kee-AS EE-ne so-STOS

A few useful notes:

• Greek stress matters a lot.
• The stressed syllables here are:
  • τό in τόπος
  • άς in κατοικίας
  • εί in είναι
  • στός in σωστός

Also:

• αι in είναι is pronounced like e
• οι/ει/η/ι/υ often sound like ee in Modern Greek

The whole subject phrase ο τόπος κατοικίας is in the nominative because it is the subject of the verb είναι.

Inside that phrase:

• ο τόπος is nominative singular
• κατοικίας is genitive singular

So you have:

• a nominative head noun: τόπος
• plus a genitive noun modifying it: κατοικίας

This is very common in Greek noun phrases.