Procjena troškova je visoka.

• procjena = estimate, assessment
• troškova = of costs / expenses
• je = is
• visoka = high

So the structure is literally Estimate of costs is high, which in natural English is The cost estimate is high or The estimate of costs is high.

Because it is in the genitive plural.

The base noun is trošak = cost, expense.
Its plural is troškovi = costs.
The form troškova means of costs.

So:

• procjena = estimate
• procjena troškova = estimate of costs

This is a very common Croatian pattern: one noun is followed by another noun in the genitive to show a relationship similar to English of.

Examples:

• cijena goriva = the price of fuel
• plan putovanja = the plan of the trip / travel plan
• procjena štete = estimate of the damage

Because it agrees with procjena, which is a feminine singular noun.

In Croatian, adjectives must agree with the noun they describe in:

• gender
• number
• case

Here:

• procjena is feminine singular
• so the adjective must also be feminine singular: visoka

Compare:

• procjena je visoka = the estimate is high
• trošak je visok = the cost is high
• cijene su visoke = the prices are high

Je is the 3rd person singular of the verb biti = to be.

So:

• je = is

Since procjena is singular, the verb must also be singular:

• Procjena je visoka. = The estimate is high.

If the subject were plural, you would use su:

• Procjene su visoke. = The estimates are high.

Croatian visok / visoka / visoko can mean both tall and high, depending on context.

With a noun like procjena or cijena, it means high:

• visoka cijena = high price
• visoka procjena = high estimate

With a person or object with physical height, it often means tall or high:

• visok čovjek = a tall man
• visoka zgrada = a tall/high building

So the meaning comes from context.

Because Croatian does not have articles like a or the.

So procjena can mean:

• an estimate
• the estimate
• sometimes just estimate, depending on context

Croatian relies on context, word order, and the situation to show whether something is specific or general.

So Procjena troškova je visoka. can mean:

• The cost estimate is high
• A cost estimate is high

In most real contexts, English would usually translate it as the estimate.

Yes. Croatian word order is more flexible than English, because case endings show the grammatical relationships.

The neutral order here is:

• Procjena troškova je visoka.

But you could also hear:

• Visoka je procjena troškova.
• Procjena troškova visoka je. (less common, more marked/stylistic)

These variants may change the focus or emphasis, but the basic meaning stays the same.

The original sentence is the most straightforward and neutral version.

It is a very common and natural noun phrase, especially in business, planning, administration, and project contexts.

It means:

• cost estimate
• estimate of costs
• cost assessment

You may also see related expressions such as:

• izrada procjene troškova = preparation of a cost estimate
• detaljna procjena troškova = detailed cost estimate
• početna procjena troškova = initial cost estimate

So yes, it is a normal and useful phrase to learn as a unit.

Yes, but it means something slightly different.

• procjena troškova = estimate of costs / expenses in general, often multiple cost items
• procjena troška = estimate of a cost or one specific cost

In many practical situations, procjena troškova is more natural because budgets and projects usually involve multiple expenses.

So:

• Procjena troškova je visoka. = The estimate of the costs is high.
• Procjena troška je visoka. = The estimate of the cost is high.

Usually in normal standard Croatian, no: you keep je in this kind of sentence.

So the normal sentence is:

• Procjena troškova je visoka.

Dropping the present tense of to be is not standard in ordinary Croatian in the way it is in some other Slavic languages or in headlines.

You might occasionally see omission in very special styles, but as a learner you should use je.

You can tell from both case and verb agreement.

• procjena is in the nominative singular, which is the normal subject form
• troškova is in the genitive plural, depending on procjena
• the verb je is singular, agreeing with procjena
• the adjective visoka is also feminine singular, again agreeing with procjena

So the structure is:

[Procjena] = subject
[troškova] = dependent noun, of costs
[je visoka] = predicate, is high

The plural of procjena is procjene.

So:

• Procjena troškova je visoka. = The cost estimate is high.
• Procjene troškova su visoke. = The cost estimates are high.

Notice the changes:

• procjena → procjene
• je → su
• visoka → visoke

This shows normal plural agreement.

A rough pronunciation guide is:

pro-tsye-na

More carefully:

• pr as in a rolled or tapped r
• o as in for but shorter and cleaner
• cj here sounds like tsy / cy
• e as in bed but pure
• na as written

And the whole sentence roughly:

Pro-tsye-na trosh-ko-va ye vee-so-ka

Some helpful sound notes:

• š = sh
• j = English y
• je sounds like ye

So:

• troškova ≈ trosh-ko-va
• je ≈ ye
• visoka ≈ vee-so-ka

Yes, and that is a different but related sentence.

• Procjena troškova je visoka. = The estimate of costs is high.
• Troškovi su visoki. = The costs are high.

The first talks about the estimated amount.
The second talks directly about the costs themselves.

In many contexts, both are possible, but they are not identical:

• one focuses on the estimate
• the other focuses on the costs