Møbelheisen står ved trappeoppgangen.

Because both nouns are in the definite singular form.

• en møbelheis = a furniture lift

• møbelheisen = the furniture lift

• en trappeoppgang = a stairwell / stair entrance
• trappeoppgangen = the stairwell / the stair entrance

In Norwegian, instead of usually putting a separate word for the in front of the noun, you often add a definite ending to the noun itself. For many masculine nouns, that ending is -en.

So this sentence is talking about the specific furniture lift and the specific stairwell.

It is one compound noun, which is very common in Norwegian.

It is made from:

• møbel = furniture
• heis = lift, elevator

So:

• møbelheis = furniture lift

Then the definite ending -en is added:

• møbelheisen = the furniture lift

Norwegian often joins words together where English might use two words.

In Norwegian, stå is often used for things that are standing upright or are positioned somewhere in a way that suggests standing.

So:

• Møbelheisen står ved trappeoppgangen literally means something like
  The furniture lift stands by the stairwell
• but in natural English, you would often just say
  The furniture lift is by the stairwell

This is very normal in Norwegian. Compare:

• Bilen står utenfor. = The car is outside.
  (literally The car stands outside)
• Flasken står på bordet. = The bottle is on the table.

So står is often about location, not only the action to stand.

Ved usually means by, near, beside, or at, depending on context.

In this sentence:

• ved trappeoppgangen = by / near the stairwell

It tells you the location of the furniture lift.

A learner often compares ved with other prepositions:

• i = in
• på = on / at
• ved = by / near / beside

So ved does not mean the lift is inside the stairwell, just that it is located next to or near it.

Trappeoppgangen comes from trappeoppgang, which usually refers to a stairwell, stair entrance, or the area around the stairs in a building.

It can refer to the shared entrance/stair area in an apartment building or similar building.

Breakdown:

• trapp / trappe- = stair
• oppgang = ascent, entrance area, stairwell area

So trappeoppgangen means the stairwell or the stair entrance, depending on context.

Yes, it is the normal Norwegian main clause word order:

• Møbelheisen = subject
• står = verb
• ved trappeoppgangen = prepositional phrase showing location

So the pattern is:

Subject + Verb + Place

This is the most neutral way to say it.

You could also move the location to the front:

• Ved trappeoppgangen står møbelheisen.

That is still correct, but it sounds more marked or descriptive. Notice that when the sentence starts with something other than the subject, the verb still comes in second position. That is an important Norwegian rule.

The dictionary form is stå = to stand.

Common forms are:

• å stå = to stand
• står = stands / is standing
• sto = stood
• har stått = has stood

In this sentence, står is the present tense.

A few pronunciation points are especially useful here:

• ø in møbel is a rounded vowel that does not exist exactly in standard English. It is somewhat like the vowel in French deux or German schön.
• hei in heis sounds like hays.
• pp in trappeoppgangen does not mean you hold the sound much longer in a dramatic way, but it does show a short preceding vowel.
• ng in oppgangen is like the ng in sing.

A rough English-style guide:

• møbelheisen ≈ MUR-bel-hice-en / MØ-bel-hice-en
• trappeoppgangen ≈ TRAHP-pe-opp-gang-en

These are only rough approximations, but they can help.

Yes, very naturally.

Norwegian often uses stå for objects, vehicles, machines, and other things that are placed somewhere:

• Bilen står i garasjen. = The car is in the garage.
• Containeren står utenfor huset. = The container is outside the house.
• Heisen står ved inngangen. = The lift is by the entrance.

So even though English often prefers is, Norwegian frequently uses står when the object is upright or simply located somewhere.

The indefinite singular forms are:

• en møbelheis = a furniture lift
• en trappeoppgang = a stairwell / a stair entrance

Then the definite forms in the sentence are:

• møbelheisen = the furniture lift
• trappeoppgangen = the stairwell

This is useful because learners often want to know how to build the sentence from the base vocabulary.

You can, but the result may sound a little unnatural in English.

Word-for-word:

• Møbelheisen = the furniture lift
• står = stands
• ved = by / near
• trappeoppgangen = the stairwell

So a literal translation is:

• The furniture lift stands by the stairwell.

That is understandable in English, but in many everyday situations a more natural English translation would be:

• The furniture lift is by the stairwell.

So the Norwegian is completely normal; the English just usually chooses a different verb.