Under Muslim Law the right of 'Shufaa' is firstly available to

Under Muslim law, pre-emption (shufaa) belongs first to the shafi-i-sharik, a co-sharer in the property sold; next to the shafi-i-khalit, a participator in appendages such as a right of way or water; and last to the shafi-i-jar, the owner of adjoining property.

So the co-sharer's right comes first.