short or long term capital gain

[Didier Burlaud]

Hi All,

 I ve hard time to find an answer to my question online,

I bought a vacant land in 2017, then built a house on it.

The construction, permit included took 2.5 years

So now, in 2020 the house is ready to sale.

Can I say that I improved my land with a new construction for almost 3 years 

and assume I will have to pay a long term capital gain ? 

or it will be a short term capital gain ?

Thank you