W tej starej kamienicy jest cicha kawalerka na poddaszu.

Because the preposition w meaning in usually requires the locative case when it describes location.

The basic dictionary form is:

• ta stara kamienica = this old tenement building

But after w, the words change to locative:

• w tej starej kamienicy = in this old tenement building

So:

• ta → tej
• stara → starej
• kamienica → kamienicy

This is a very common pattern in Polish: prepositions often force a particular case.

Kamienica is not just any house or apartment block. It usually means a traditional multi-storey urban residential building, often an older one, especially in a city.

Depending on context, English translations might include:

• tenement building
• townhouse-style apartment building
• old apartment house

It often suggests an older, solid city building, sometimes from the 19th or early 20th century.

So stara kamienica gives a specific image: an old city apartment building, not a modern block of flats.

Here tej is the locative form of ta, which usually means this or that, depending on context.

In modern Polish, ten / ta / to often covers both this and that in everyday speech. Polish does not always make the same sharp distinction English does.

So:

• ta kamienica = this/that building
• w tej kamienicy = in this/that building

In many learner materials it is often safest to think of ten / ta / to as this, unless context clearly suggests otherwise.

Kawalerka means a studio apartment or bedsit: a small flat consisting mainly of one main room, usually with a small kitchen area and a bathroom.

It is a feminine noun, which is why the adjective matches it:

• cicha kawalerka = a quiet studio apartment

The word historically relates to kawaler meaning bachelor, because such a small flat was stereotypically associated with one person.

Because adjectives in Polish must agree with the noun in:

• gender
• number
• case

Here kawalerka is:

• feminine
• singular
• nominative

So the adjective also takes the feminine singular nominative form:

• cichy → masculine
• cicha → feminine
• ciche → neuter

That is why we get:

• cicha kawalerka

Here jest means there is / is.

The sentence structure is basically:

• W tej starej kamienicy jest cicha kawalerka na poddaszu.
• In this old tenement building there is a quiet studio apartment in the attic/top floor.

Polish often uses jest to state that something exists somewhere.

It is not the same as sentences where the present-tense to be is omitted, for example:

• Ona jest miła can often be shortened in some contexts, but
• existential sentences like There is... normally use jest

So here jest is very natural and important.

Because na can take different cases depending on meaning.

When it shows location and answers where?, it usually takes the locative:

• na poddaszu = in/on the attic, in the loft area, on the top floor under the roof

When it shows movement toward a destination and answers where to?, it usually takes the accusative:

• na poddasze = to the attic / up to the loft

So compare:

• Mieszkam na poddaszu. = I live in the attic/top-floor loft space.
• Idę na poddasze. = I’m going up to the attic.

Not always exactly. Poddasze is the space directly under the roof, but in real-life usage it can mean:

• an attic
• a loft
• a top-floor space under the roof
• an attic apartment area

So in this sentence, kawalerka na poddaszu suggests a studio apartment located under the roof, probably on the top floor.

Depending on context, English might translate it as:

• in the attic
• in the loft
• on the top floor
• in the attic space

Because Polish does not have articles.

English needs:

• a quiet studio apartment
• the old building

Polish simply says:

• cicha kawalerka
• stara kamienica

Whether something is a or the is understood from context.

So jest cicha kawalerka can mean:

• there is a quiet studio apartment
• sometimes, depending on context, something closer to there is the quiet studio apartment

But in this sentence, English naturally uses a quiet studio apartment.

Yes, Polish word order is fairly flexible.

The given sentence:

• W tej starej kamienicy jest cicha kawalerka na poddaszu.

is natural because it starts with the location and then introduces what exists there. That is a common Polish pattern.

Other word orders are possible, for example:

• Cicha kawalerka jest na poddaszu w tej starej kamienicy.
• Na poddaszu w tej starej kamienicy jest cicha kawalerka.

These versions are grammatical, but they shift emphasis.

The original sounds like:

• first set the scene: in this old building
• then present new information: there is a quiet studio apartment

Usually quiet in this kind of sentence.

For a flat or room, cichy / cicha / ciche means:

• not noisy
• peaceful
• calm

So cicha kawalerka means a studio apartment that is quiet, probably away from street noise or loud neighbors.

It does not mean the apartment is literally silent in an absolute sense.

Because in this sentence kawalerka is the subject-like noun in an existential structure.

Polish often uses nominative after jest when the sentence means there is / there exists:

• Jest problem. = There is a problem.
• Jest mały pokój. = There is a small room.
• Jest cicha kawalerka. = There is a quiet studio apartment.

So even though it comes later in the sentence, kawalerka is still in the nominative.

Yes, it is natural and correct.

It sounds like something you might read in:

• a property description
• a story setting
• a housing advertisement

It gives three pieces of information smoothly:

• where: w tej starej kamienicy
• what there is: jest cicha kawalerka
• exactly where in the building: na poddaszu

So it is a good, idiomatic sentence for learners to study.