Bazı ortak giderler arsa payına göre belirleniyor.

Ortak giderler means shared/common expenses.

It is made of:

• ortak = common, shared
• gider = expense, cost
• giderler = expenses, costs

So ortak giderler is literally common expenses or shared expenses.

In contexts like apartment buildings or housing complexes, this often refers to things like:

• maintenance costs
• cleaning fees
• elevator costs
• building management expenses

Arsa payı is a fixed expression in Turkish property/apartment law.

• arsa = land, plot
• pay = share, portion
• arsa payı = land share / ownership share in the land

In apartment ownership, each flat may have an official arsa payı, which is its proportional share of the land the building stands on. Certain common expenses are calculated based on that share.

So this is not just any random share of land phrase; it is a common legal/property term.

Because the postposition göre requires the word before it to be in the dative case.

So:

• arsa payı = land share
• arsa payına = according to the land share / based on the land share

Here is the breakdown:

• payı already contains the 3rd person possessive ending, because arsa payı is a noun compound
• then the dative ending -a / -e is added
• because the word already ends in a vowel-like possessive form, Turkish inserts a buffer n
• so: payı + na → payına

That is why you get arsa payına göre = according to the land share

Göre usually means:

• according to
• in accordance with
• based on
• compared to

It normally follows a noun or pronoun in the dative case.

Examples:

• bana göre = according to me / in my opinion
• yasaya göre = according to the law
• duruma göre = depending on the situation
• arsa payına göre = according to the land share

So in your sentence, arsa payına göre tells you the basis used for determining the expenses.

Belirleniyor is from the verb belirlemek = to determine, to set, to define.

Here it is in a passive form:

• belirlemek = to determine something
• belirlenmek = to be determined

Then it is conjugated in the present continuous / non-past:

• belirleniyor = is being determined / gets determined / are determined

Since the subject is plural (giderler), English uses are determined, but Turkish often keeps the verb in 3rd person singular when the subject is plural, especially when the subject comes before the verb. So giderler belirleniyor is completely normal.

Turkish often uses the passive when the doer is:

• unknown
• unimportant
• obvious from context
• intentionally left unstated

So Bazı ortak giderler arsa payına göre belirleniyor focuses on the rule or process, not on the person or institution doing it.

It is similar to English:

• Some common expenses are determined according to the land share

If you wanted to name the doer, Turkish could use an active sentence, for example:

• Yönetim bazı ortak giderleri arsa payına göre belirliyor. = The management determines some common expenses according to the land share.

This is a very common point for English speakers.

The Turkish -yor form does not only mean right now. It can also describe:

• current situations
• regular practices
• ongoing systems
• general procedures

So here belirleniyor can mean something like:

• are determined
• are being determined
• get determined

In formal or explanatory statements, Turkish often uses -yor where English would use a simple present.

So this sentence is not necessarily about something happening at this exact moment; it can describe a standing rule.

Bazı means some.

In Turkish, after words like bazı, the noun is often plural when talking about countable things:

• bazı insanlar = some people
• bazı kitaplar = some books
• bazı giderler = some expenses

So bazı ortak giderler is perfectly normal.

English speakers sometimes expect Turkish to avoid plurals after quantifiers because that happens with some numbers:

• üç kitap = three books, not üç kitaplar

But bazı behaves differently from numerals. With bazı, plural marking is very common and natural.

The sentence is:

Bazı ortak giderler arsa payına göre belirleniyor.

A natural breakdown is:

• Bazı ortak giderler = some common expenses
• arsa payına göre = according to the land share
• belirleniyor = are determined

So the structure is basically:

Subject + adverbial phrase + verb

This is very normal Turkish word order, since Turkish usually places the verb at the end.

You could think of it as:

• Some common expenses / according to the land share / are determined.

That sounds odd in English, but it is natural in Turkish.

Turkish does not have articles like English a/an and the.

So whether something is definite or indefinite is understood from:

• context
• word order
• case marking
• words like bazı

Here, bazı already tells you the meaning is some:

• Bazı ortak giderler = some common expenses

So Turkish does not need a separate word for some plus an article.

Yes. In this sentence, göre can often be translated in several natural ways, depending on context:

• according to the land share
• based on the land share
• in proportion to the land share

The most natural English choice depends on the exact legal or financial context. If the idea is proportional calculation, in proportion to may even be the clearest translation.

So learners should not assume there is only one fixed English equivalent for göre.