"यह मकान नया नहीं है।"

Translation: This house is not new.

[MarcinM85]

What is the difference between मकान and घर?

[vinay92]

मकान is used, often impersonally, to refer to the building that constitutes a house. On the other hand, while घर can also be used to mean 'house', it is more often used to mean 'home'.

[MarksAaron]

शुक्रिया!

[Srideviram4]

Both are house

[wihlke]

When do we use इस as opposed to यह?

[GEE_ZET]

I would also like to know the answer to this question.

[wihlke]

I have since learned that इस is the oblique form of यह. Which makes sense with the possessive pronouns like यह + के = इसके etc.

[imSKumar]

Why it's wrong to use as "This is not new house"

[vinay92]

'This is not a new house' would be यह (एक) नया मकान नहीं है. The subject of this sentence is 'This'/'यह'.

On the other hand, the subject of 'यह मकान नया नहीं है'/'This house is not new' is 'This house'/'यह मकान'.

[krish364376]

Why not "building"?