Felleskostnadene blir høyere.

Because Norwegian often makes compound nouns by joining words together.

Here, felleskostnadene is built from:

• felles = shared, common
• kostnader = costs, expenses
• -ne = the

So the full noun means the shared/common costs/expenses.

English usually writes this as separate words, but Norwegian very often combines them into one word.

The ending -ene marks the noun as definite plural.

A quick pattern:

• en kostnad = a cost
• kostnaden = the cost
• kostnader = costs
• kostnadene = the costs

So felleskostnadene means the shared costs or the common expenses, not just shared costs in general.

In Norwegian, the is usually attached to the end of the noun instead of being a separate word before it.

So instead of saying something like English the costs, Norwegian often says kostnadene, where the definite meaning is built into the noun.

That is why felleskostnadene already includes the idea of the.

Blir is the present tense of bli, which often means become.

In this sentence, blir høyere means become higher.

So grammatically, the sentence is saying that the shared costs are becoming or will be higher, depending on context. In everyday English, this is often translated more naturally as The shared costs are going up or The common charges will be higher.

Because høyere is the normal comparative form of høy.

Just like English has:

• high
• higher

Norwegian has:

• høy
• høyere

So høyere means higher. Norwegian usually forms this kind of comparative with -ere, not by adding a separate word like mer in this case.

Yes, dyrere could also make sense, but the nuance is a little different.

• høyere = higher
• dyrere = more expensive

With things like fees, rents, prices, rates, and charges, Norwegian often uses høy and høyere in the same way English uses high and higher:

• høye priser = high prices
• høy rente = high interest rate
• høyere kostnader = higher costs

So Felleskostnadene blir høyere is very natural.

You can tell from the form of the noun.

The singular and plural forms of kostnad are:

• en kostnad = a cost
• kostnaden = the cost
• kostnader = costs
• kostnadene = the costs

Since the sentence uses kostnadene, it is clearly plural: the costs.

The structure is very straightforward:

• Felleskostnadene = subject
• blir = verb
• høyere = complement/predicative adjective

So it follows the normal Norwegian main clause pattern:

subject + verb + complement

This is very similar to English:

The shared costs + become/are becoming + higher

Yes, høyere is an adjective in the comparative form.

In this sentence, it is used after blir, so it describes the subject: felleskostnadene.

A useful point for learners: comparative adjectives like høyere do not change for gender or number here. So you use høyere regardless of whether the noun is singular, plural, masculine, feminine, or neuter.

Yes, you could, and it would sound natural.

The difference is small:

• Felleskostnadene blir høyere = the shared costs become higher
• Felleskostnadene øker = the shared costs increase

Both are common and correct. The first focuses on the result higher, while the second focuses on the action increasing.

A rough learner-friendly pronunciation would be something like:

FEL-less-kost-na-de-ne

A few tips:

• felles has a clear e sound, not like English feel
• kost sounds close to English cost, but with a Norwegian vowel quality
• -ene at the end is pronounced clearly, roughly eh-neh

The stress is mainly near the beginning of the compound, especially on fel-.

Yes. Norwegian present tense often covers both meanings, depending on context.

So blir can mean:

• are becoming
• will be

For example, if someone is talking about a change already underway, it may mean are becoming higher. If they are talking about next month or next year, it may mean will be higher.

The surrounding context tells you which meaning is intended.