Mits de WOZ-waarde niet klopt, herziet de gemeente de beschikking.

Mits means provided that, as long as, or on condition that. It introduces a condition that must be met.

Compared with als:

• mits is more formal and often appears in legal, administrative, or official language
• als is the more common everyday word for if

So this sentence sounds quite official. In everyday Dutch, many speakers would more naturally use als.

Because mits introduces a subordinate clause.

In Dutch subordinate clauses, the finite verb usually goes to the end. That is why you get:

• Mits de WOZ-waarde niet klopt

and not:

• Mits de WOZ-waarde klopt niet

This is a very common Dutch word-order pattern after words like:

• omdat
• als
• dat
• terwijl
• mits

Because the sentence starts with a subordinate clause: Mits de WOZ-waarde niet klopt.

When something other than the subject comes first in a Dutch main clause, the finite verb still has to stay in the second position. That causes inversion:

• Mits de WOZ-waarde niet klopt, herziet de gemeente de beschikking.

The subject de gemeente comes after the verb herziet.

If you put the main clause first, you get the normal order:

• De gemeente herziet de beschikking, mits de WOZ-waarde niet klopt.

Yes, kloppen can mean to knock, but it also very often means to be correct, to be right, or to add up.

In this sentence:

• de WOZ-waarde klopt niet

means:

• the WOZ value is not correct
• the WOZ value is wrong

This is very idiomatic Dutch. You will hear dat klopt all the time for that’s correct.

WOZ-waarde is a fixed Dutch administrative term.

• WOZ stands for Waardering Onroerende Zaken
• waarde means value

It refers to the official property value assigned by the municipality, used for things like taxes and other local government calculations.

The hyphen is used because WOZ is an abbreviation attached to a noun.

Here, beschikking means an official decision, ruling, or formal notice issued by an authority.

In administrative Dutch, it often refers to a document or decision sent by a government body.

That is important because beschikking can mean different things in other contexts. For example, in tot je beschikking, it means something like at your disposal. But here it is definitely the official/legal sense.

Herziet comes from the verb herzien, which means to revise, to review, or to reconsider.

It is an irregular verb based on zien.

Present tense:

• ik herzie
• jij herziet / herzie
• hij/zij herziet
• wij/jullie/zij herzien

So de gemeente herziet means the municipality revises/reviews.

Because herzien is quite formal, it fits the official style of the sentence.

Yes:

• De gemeente herziet de beschikking, mits de WOZ-waarde niet klopt.

That is grammatically correct and means the same thing.

The difference is mainly word order:

• if the subordinate clause comes first, you get inversion in the main clause: herziet de gemeente
• if the main clause comes first, you keep the normal order: de gemeente herziet

Because the sentence begins with a subordinate clause, and Dutch normally places a comma between that clause and the main clause.

So:

• Mits de WOZ-waarde niet klopt, herziet de gemeente de beschikking.

This comma helps mark the boundary between:

1. the condition
2. the main statement

In formal written Dutch, this is standard punctuation.

It is definitely formal and bureaucratic in tone.

Words that make it sound official include:

• mits
• WOZ-waarde
• herziet
• beschikking

In more everyday Dutch, someone might say something closer to:

• Als de WOZ-waarde niet klopt, past de gemeente de beschikking aan.

That version is less formal but keeps the same general idea.

The subject of the main clause is de gemeente.

This can be confusing because it comes after the verb:

• herziet de gemeente de beschikking

But the subject is still de gemeente. The word order changes because the sentence begins with the subordinate clause.

So the structure is:

• subordinate clause: Mits de WOZ-waarde niet klopt
• main clause: herziet de gemeente de beschikking

In the main clause:

• verb = herziet
• subject = de gemeente
• object = de beschikking