Is my translation correct in the following examples?

>If (when) I build a house I will buy furniture.

>家を建てたら、家具を買う。

>If I built a house I would buy furniture.

>家を建てたなら、家具を買った。

>If I build a house I will have a place to live.

>家を建てると住む場所がある。

>If I build a house I will buy good furniture.
>家を建てれば、良い家具を買う。