Berikutan perpindahan rumah, pertukaran alamat itu diperlukan.

Berikutan often means following, as a result of, or in connection with. In this sentence, it suggests both sequence and reason:

• following the house move
• because of the house move

That overlap is very common in formal Malay.
Compared with other options:

• selepas = more clearly after
• kerana = more clearly because
• akibat = as a result of, often with a stronger cause-effect feeling

So berikutan is a formal connector that works well in administrative or official writing.

Pindah is the basic root meaning move or transfer.
Perpindahan is a noun formed from that root, meaning movement, relocation, or transfer.

So:

• pindah rumah = to move house
• perpindahan rumah = the house move / the relocation

This kind of noun formation is very common in Malay, especially in formal language. English does the same thing:

• move → movement/relocation
• change → change/exchange

In normal usage, perpindahan rumah means moving house or relocation of residence, not selling or transferring ownership of a house.

Here rumah tells you what kind of move it is: a move of one’s home.

A more everyday verbal version would be:

• berpindah rumah = to move house

The noun phrase perpindahan rumah sounds more official and document-like.

Pertukaran alamat means change of address.

It comes from tukar = change / exchange / switch.

Another possible phrase is perubahan alamat, from ubah = alter / change.

In practice:

• pertukaran alamat is common in administrative contexts
• perubahan alamat is also understandable, but may sound slightly less like standard form language in this kind of context

So for forms, notices, and official statements, pertukaran alamat is very natural.

In Malay, demonstratives like ini and itu usually come after the noun phrase, not before it as in English.

So:

• rumah itu = that house
• alamat itu = that address
• pertukaran alamat itu = that address change

A useful rule: ini/itu normally go at the end of the noun phrase they modify.

So itu here applies to the whole phrase pertukaran alamat, not just to alamat alone.

Diperlukan means is required, is needed, or is necessary.

It is a passive-style form related to memerlukan = to require / to need.

Compare:

• Pihak bank memerlukan dokumen itu.
  = The bank requires that document.

• Dokumen itu diperlukan.
  = That document is required.

In your sentence:

• pertukaran alamat itu diperlukan
  = that address change is required

This is a very common formal Malay pattern.

Malay often uses passive or impersonal wording in formal statements, especially when the doer is not important or not mentioned.

Here, the focus is on what is required, not on who requires it.

So:

• pertukaran alamat itu diperlukan = the address change is required

is more natural in official style than something like:

• seseorang memerlukan pertukaran alamat itu = someone requires that address change

The passive-style wording sounds more neutral, formal, and administrative.

Malay often does not need a copula like English is/are in simple statements.

So:

• Pertukaran alamat itu diperlukan
  literally looks like That address change required/needed

but naturally means:

• That address change is required

This is normal Malay grammar.
Malay frequently omits a separate word for to be in sentences like this.

The sentence has two parts:

1. Berikutan perpindahan rumah
   = an introductory phrase giving the reason/background

2. pertukaran alamat itu diperlukan
   = the main statement

So the structure is roughly:

• [Reason/Background] + [Main clause]

A simple breakdown:

• Berikutan = following / as a result of
• perpindahan rumah = moving house
• pertukaran alamat itu = that address change
• diperlukan = is required

Yes, it is quite formal and bureaucratic in tone.

The formality comes from words like:

• berikutan
• perpindahan
• pertukaran
• diperlukan

In everyday speech, people would often say something simpler, such as:

• Sebab saya pindah rumah, saya perlu tukar alamat.
• Lepas pindah rumah, alamat itu perlu ditukar.

These sound more conversational.
The original sentence sounds like something from a notice, letter, form, or official explanation.

The comma separates the introductory phrase from the main clause.

So:

• Berikutan perpindahan rumah, = background/reason
• pertukaran alamat itu diperlukan. = main point

In formal writing, this comma helps readability.
You may sometimes see Malay punctuation used a little more flexibly than in English, but here the comma is perfectly natural.