אם לא היה זבל בחדר, לא הייתי צריכה לקחת את הפח מהמטבח.

This is a past counterfactual sentence: it talks about a situation that did not happen that way.

The structure is:

• אם לא היה... = If there hadn’t been...
• לא הייתי צריכה... = I wouldn’t have needed to...

So the sentence strongly implies:

• there was trash in the room, and
• because of that, I did need to take the trash can from the kitchen.

Hebrew often uses plain past forms in this kind of unreal/hypothetical sentence.

היה is the past form of להיות (to be), but in sentences like this it often means there was / there existed.

So:

• יש זבל בחדר = There is trash in the room
• היה זבל בחדר = There was trash in the room
• לא היה זבל בחדר = There wasn’t trash in the room

Hebrew uses היה/היו for past existence, where English uses there was / there were.

Because זבל is treated as a singular masculine noun here.

Even though in English trash feels like an uncountable mass noun, Hebrew still makes the verb agree grammatically with the noun:

• היה זבל = there was trash
• היו שקיות = there were bags

So היה is singular, matching זבל.

In unpointed Hebrew writing, בחדר can represent either:

• בְּחֶדֶר = in a room
• בַּחֶדֶר = in the room

They are spelled the same without vowel marks.

In this sentence, the meaning is clearly in the room, so it is understood as בַּחֶדֶר. This happens a lot in normal Hebrew spelling: the definite article after certain prepositions is not separately visible.

The same kind of thing happens in words like:

• בבית = in the house / in a house depending on context and pronunciation

Hebrew very often expresses need with צריך/צריכה plus a form of היה plus an infinitive.

So:

• אני צריכה לקחת = I need to take
• הייתי צריכה לקחת = I needed / would have needed to take
• לא הייתי צריכה לקחת = I didn’t need / wouldn’t have needed to take

This is a very common pattern in Hebrew. It is more natural than trying to use a single standalone verb meaning need in many everyday contexts.

Because the speaker is female.

Hebrew adjectives and adjective-like words often agree with the subject’s gender, and צריך/צריכה behaves that way here.

• female speaker: הייתי צריכה
• male speaker: הייתי צריך

So if a man said the same sentence, it would be:

אם לא היה זבל בחדר, לא הייתי צריך לקחת את הפח מהמטבח.

In this type of sentence, Hebrew usually does not need a separate word for would.

Instead, the unreal/hypothetical meaning comes from:

1. the אם clause,
2. the use of past forms, and
3. the overall context.

So:

• אם לא היה..., לא הייתי צריכה...

naturally means something like:

• If there hadn’t been..., I wouldn’t have needed...

This is very normal Hebrew grammar.

את marks a definite direct object.

Here, הפח means the trash can / the bin, which is definite because it has ה־ (the). So Hebrew uses את before it:

• לקחת את הפח = to take the trash can

Compare:

• לקחת פח = to take a trash can
• לקחת את הפח = to take the trash can

So את does not mean with here. It is just the direct-object marker.

They are not the same thing:

• זבל = trash, garbage, rubbish
• פח = trash can, bin

So in this sentence:

• זבל בחדר = trash in the room
• לקחת את הפח = take the trash can

A learner might expect the same word for both, but Hebrew clearly distinguishes the garbage itself from the container.

מהמטבח means from the kitchen.

It is made of:

• מ־ = from
• ה־ = the
• מטבח = kitchen

So:

• ממטבח would be from a kitchen
• מהמטבח = from the kitchen

In regular unpointed spelling, the preposition and article combine into one written word.

Because after צריך/צריכה, Hebrew normally uses an infinitive to say what action is needed.

So the pattern is:

• צריך/צריכה + infinitive

Examples:

• אני צריך ללכת = I need to go
• היא צריכה לאכול = She needs to eat
• הייתי צריכה לקחת = I needed / would have needed to take

Here, לקחת is the action that was necessary.

The sentence’s word order is very natural, but Hebrew does allow some flexibility.

The given order:

אם לא היה זבל בחדר, לא הייתי צריכה לקחת את הפח מהמטבח.

is straightforward and neutral.

You might also hear slight variations for emphasis, but not every change sounds equally natural. For example, Hebrew often keeps:

• the אם clause first,
• then the result clause,
• and the object after the infinitive.

So for a learner, the current word order is a very good model to follow.

Yes, it is grammatical and natural.

It has a slightly careful, complete style because it clearly spells out the logic:

• no trash in the room
• therefore no need to bring/take the bin from the kitchen

In casual speech, native speakers might sometimes shorten or rephrase parts of it, but the sentence itself is perfectly normal Hebrew.