Το πιστωτικό ίδρυμα είναι κοντά.

A natural pronunciation is:

to pistotikó ídryma íne kondá

Stress falls on:

• -κό in πιστωτικό
• ί- in ίδρυμα
• εί- in είναι
• -τά in κοντά

A rough English-style guide:

• Το = toh
• πιστωτικό = pee-stoh-tee-KOH
• ίδρυμα = EE-dhree-ma (the δρ part is smoother than in English)
• είναι = EE-ne
• κοντά = kon-DA

Πιστωτικό ίδρυμα is a formal expression meaning credit institution.

It is often used in legal, financial, or official contexts, and it can refer to:

• a bank
• a financial institution
• a regulated lending institution

Literally:

• πιστωτικό = credit / financial-credit related
• ίδρυμα = institution / foundation

So the whole phrase is more formal than everyday bank language.

Because ίδρυμα is a neuter noun.

In Greek, the definite article changes according to gender:

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

Since ίδρυμα is neuter, you say:

• το ίδρυμα = the institution

And because πιστωτικό describes ίδρυμα, it also appears in the neuter form.

Because adjectives in Greek must agree with the noun they describe in gender, number, and case.

Here:

• ίδρυμα is neuter
• singular
• nominative

So the adjective must also be neuter singular nominative:

• masculine: πιστωτικός
• feminine: πιστωτική
• neuter: πιστωτικό

That is why the sentence has το πιστωτικό ίδρυμα.

Είναι means is or are.

It is the present-tense form of to be, and in Modern Greek it does not change between singular and plural the way English does:

• είναι = is
• είναι = are

So:

• Το ίδρυμα είναι κοντά = The institution is nearby
• Τα ιδρύματα είναι κοντά = The institutions are nearby

The subject tells you whether it is singular or plural.

Here, κοντά means nearby / close by.

In this sentence it stands on its own:

• Το πιστωτικό ίδρυμα είναι κοντά.
• The credit institution is nearby.

When Greek wants to say close to something, κοντά is often followed by another word or phrase, for example:

• κοντά στο σπίτι = close to the house
• κοντά μου = near me
• κοντά σε μια τράπεζα = near a bank

So in your sentence, because nothing follows κοντά, the sense is simply nearby.

Because the sentence does not actually say close to something. It just says nearby.

Compare:

• Το πιστωτικό ίδρυμα είναι κοντά.
  = The credit institution is nearby.

• Το πιστωτικό ίδρυμα είναι κοντά στο μουσείο.
  = The credit institution is close to the museum.

In the second example, στο supplies the idea of to / at the.

Here it is best understood as an adverbial word meaning nearby / close by.

That is why it does not change form:

• not masculine/feminine/neuter
• not singular/plural

Greek often uses είμαι + κοντά in a way that English expresses with be close or be nearby.

So even though English uses an adjective in is close, Greek uses κοντά in a very fixed, adverb-like way.

Yes. Greek word order is more flexible than English word order.

The neutral, straightforward order is:

• Το πιστωτικό ίδρυμα είναι κοντά.

But Greek can move words around for emphasis, for example:

• Κοντά είναι το πιστωτικό ίδρυμα.

That might sound more marked, as if emphasizing nearby.

For learners, the original version is the safest and most natural basic pattern:

• subject + είναι + κοντά

Not usually in everyday conversation.

A Greek speaker would more commonly say:

• Η τράπεζα είναι κοντά. = The bank is nearby.

Πιστωτικό ίδρυμα sounds more:

• formal
• technical
• legal
• institutional

So your sentence is grammatically correct, but the vocabulary is more official than conversational.

The plural of ίδρυμα is ιδρύματα.

So:

• το ίδρυμα = the institution
• τα ιδρύματα = the institutions

The adjective also changes to match:

• singular: το πιστωτικό ίδρυμα
• plural: τα πιστωτικά ιδρύματα

So the full plural sentence would be:

• Τα πιστωτικά ιδρύματα είναι κοντά.
• The credit institutions are nearby.