Byggetillatelsen er klar.

Because Norwegian very often makes compound nouns by joining words together.

Here, byggetillatelsen is built from:

• bygge = build / building
• tillatelse = permission, permit
• -n / -en = the definite ending

So:

• byggetillatelse = building permit
• byggetillatelsen = the building permit

This is much more natural in Norwegian than writing it as separate words.

In Norwegian, the definite article is usually attached to the end of the noun.

So instead of saying the building permit with a separate word like English does, Norwegian says:

• en byggetillatelse = a building permit
• byggetillatelsen = the building permit

The ending -en shows that the noun is definite singular.

Because tillatelse is a common gender noun in Norwegian.

Its basic pattern is:

• en tillatelse = a permit
• tillatelsen = the permit

Since byggetillatelse ends with tillatelse and follows the gender of the main noun, it also takes en:

• en byggetillatelse
• byggetillatelsen

The dictionary form is byggetillatelse.

That is the indefinite singular form, the form you would usually look up in a dictionary.

Typical forms are:

• en byggetillatelse = a building permit
• byggetillatelsen = the building permit
• byggetillatelser = building permits
• byggetillatelsene = the building permits

Because er is the present tense of å være = to be, and here the sentence is describing a current state.

• er klar = is ready / is clear / is finalized, depending on context

So the sentence simply says that the permit is now in that state.

Compare:

• Byggetillatelsen er klar. = The building permit is ready.
• Byggetillatelsen blir klar. = The building permit is becoming ready / will be ready.
• Byggetillatelsen har blitt klar. = The building permit has become ready.

Because klar agrees with the noun it describes.

Byggetillatelsen is a singular common gender noun, so the adjective is:

• klar

Compare:

• Byggetillatelsen er klar. = common gender singular
• Huset er klart. = neuter singular
• Dokumentene er klare. = plural

So klart would be wrong here because that form is used with a neuter singular noun.

Not always. Klar can have a few related meanings depending on context, such as:

• ready
• finished
• settled
• cleared
• approved for use

With byggetillatelsen, it often means something like:

• the permit is ready
• the permit has been finalized
• the permit is in place
• the permit has been approved

So even if the translation shown to the learner is ready, the real-life nuance can be a bit broader.

Because in Norwegian, the usual way to say the is with a suffix on the noun.

So:

• byggetillatelsen already means the building permit

You do sometimes see den, but usually when there is an adjective before the noun:

• den nye byggetillatelsen = the new building permit

Here, there is no adjective inside the noun phrase, so byggetillatelsen by itself is enough.

Yes, in this sentence it is very similar to English:

• Byggetillatelsen = subject
• er = verb
• klar = subject complement

So the structure is:

• Subject + verb + adjective

This is a very common and straightforward Norwegian sentence pattern.

A rough guide for English speakers is:

BYG-ge-til-LAHT-el-sen

A few pronunciation notes:

• y in Norwegian is not like English y in yes. It is a front rounded vowel, something English does not really have.
• gg here sounds like a normal hard g sound.
• The stress is often heard strongly in the first part and again in the -lat- part of the compound, depending on speaking style.

You do not need perfect pronunciation immediately; the important thing is to recognize it as one compound word.

Usually klar is the more natural choice here.

• klar = ready, available, finalized, cleared
• ferdig = finished, done

Ferdig is often used for something that has been completed, like work, food, or a task:

• Middagen er ferdig. = Dinner is ready/done.
• Jeg er ferdig med rapporten. = I’m finished with the report.

For a permit, klar sounds more natural because the idea is often that it is now available, approved, or ready for use.

The plural forms are:

• byggetillatelser = building permits
• byggetillatelsene = the building permits

So the sentence in plural would be:

• Byggetillatelsene er klare. = The building permits are ready.

Notice that both the noun and the adjective change:

• byggetillatelsen → byggetillatelsene
• klar → klare

Yes, depending on context.

In everyday translation, it may correspond to:

• building permit
• construction permit
• sometimes planning permission

The exact English choice depends on the legal or administrative system being talked about. Norwegian often uses one term where English may use slightly different official terms in different countries.