amido no chikaku ni monohoshi ga aru node, sentakumono o hosu toki ni benri desu.

to be

Breakdown of amido no chikaku ni monohoshi ga aru node, sentakumono o hosu toki ni benri desu.

• を: direct object particle
• が: subject particle
• の: possessive case particle

Questions & Answers about amido no chikaku ni monohoshi ga aru node, sentakumono o hosu toki ni benri desu.

How is this sentence structured overall?

It has two main parts:

• 網戸の近くに物干しがあるので
  = because there is a clothes-drying rack / clothesline near the screen

• 洗濯物を干すときに便利です
  = it is convenient when hanging laundry

So the pattern is:

• reason clause + ので
• main statement

A very literal flow is:

• Near the screen, there is a clothes-drying thing, so
• when hanging laundry, it is convenient

Japanese often puts the reason first and the conclusion second.

Why is の used in 網戸の近く?

Because 近く is functioning like a noun meaning vicinity or area nearby.

So:

• 網戸の近く = the area near the screen
• 駅の近く = the area near the station
• 家の近く = the area near the house

This is the very common pattern:

• A の 近く = near A

Why is there a に after 近く?