Das kleine Haus ist hübsch.

Because Haus is a neuter noun in German, and the nominative singular definite article for neuter nouns is das.

German nouns have grammatical gender:

• der = masculine
• die = feminine
• das = neuter

So:

• das Haus = the house

This gender is a property of the noun itself, not of the real-world object. A house is not “neuter” in a logical sense; it is simply grammatically neuter in German.

Because klein is being used before a noun, so it must take an adjective ending.

In das kleine Haus, kleine is an attributive adjective: it directly describes the noun Haus.

After the definite article das, the adjective takes -e in the nominative singular neuter:

• das kleine Haus

This is part of German adjective declension. English adjectives do not change form, but German ones often do.

Compare:

• ein kleines Haus = a small house
• das kleine Haus = the small house

The ending changes depending on the article, gender, number, and case.

Because hübsch comes after the verb ist, so it is being used as a predicate adjective, not an attributive adjective.

Predicate adjectives in German usually do not take endings:

• Das Haus ist hübsch. = The house is pretty.
• Das Haus ist klein. = The house is small.

But before a noun, the adjective does take an ending:

• das hübsche Haus = the pretty house
• das kleine Haus = the small house

So:

• das kleine Haus → adjective before noun, with ending
• ist hübsch → adjective after sein, no ending

Because all nouns are capitalized in German.

So German writes:

• das Haus
• der Mann
• die Stadt

This is a standard rule, not something special about this sentence.

Adjectives and verbs are normally not capitalized unless they begin the sentence or are part of a noun phrase used as a noun.

In this sentence, yes, it is very similar to English:

• Das kleine Haus = the subject
• ist = the verb
• hübsch = the complement/adjective

So the structure is: Subject + verb + adjective

This matches English: The small house is pretty.

A very important German rule is that in a normal main clause, the finite verb usually comes in second position. Here, ist is the finite verb, and it is in second position.

It is in the nominative case, because it is the subject of the sentence.

The subject is the thing that is something:

• Das kleine Haus is pretty.

That is why you get:

• das for the article
• kleine for the adjective ending

If the noun were in another case, the forms could change.

The tricky part is ü, which does not exist in normal English spelling.

A rough guide:

• Start by making an ee sound with your tongue, like in see
• Then round your lips as if you were saying oo

That gives you something close to German ü.

So hübsch is approximately pronounced like: hyoopsh or hübsh, but neither English spelling is perfect.

Also:

• sch in German sounds like English sh
• So hübsch ends with a sh sound

Yes. Hübsch often means pretty, nice-looking, or attractive.

For a house, it can mean something like:

• pretty
• cute
• attractive
• nice-looking

It is a normal word to use for objects, places, and people, though the exact tone depends on context.

For a house, some other possible adjectives are:

• schön = beautiful / nice
• hübsch = pretty / attractive
• nett = nice
• klein = small

So Das kleine Haus ist hübsch sounds natural.

Klein is the basic dictionary form of the adjective.

Kleine is one of the forms it takes when it appears before a noun and needs an ending.

So:

• klein = base form
• kleine = inflected form used here

Compare:

• Das Haus ist klein. = The house is small.
• das kleine Haus = the small house

This is very common in German:

• Das Auto ist alt.
• das alte Auto

Yes, grammatically you could, but it sounds repetitive because you are saying the house is pretty and also calling it the pretty house.

Still, it is useful for seeing the grammar:

• das hübsche kleine Haus = the pretty small house
• ist hübsch = is pretty

Both hübsche and kleine have endings because they come before the noun Haus.

In natural speech, you would more likely say something like:

• Das kleine Haus ist hübsch.
• Das hübsche Haus ist klein.
• Das kleine Haus ist sehr schön.

Because they have two different jobs:

• kleine is attached directly to Haus and helps identify the noun: the small house
• hübsch comes after ist and tells you something about the subject: is pretty

So the sentence has:

• an attributive adjective: kleine
• a predicate adjective: hübsch

This is why one has an ending and the other does not. That difference is very important in German grammar.