The Messenger of Allah ﷺ as saying: There is the right of option regarding everything which is shared, whether a dwelling or a garden. It is not lawful to sell before informing one's partner, but if he sells without informing him, he has the greatest right to it. (Using translation from Abū Dāʾūd 3513)  

قَالَ رَسُولُ اللهِ ﷺ «الشُّفْعَةُ فِي كُلِّ شِرْكٍ رَبْعَةٍ أَوْ حَائِطٍ لَا يَصْلُحُ لَهُ أَنْ يَبِيعَ حَتَّى يُؤْذِنَ شَرِيكَهُ فَإِنْ بَاعَ فَهُوَ أَحَقُّ بِهِ حَتَّى يُؤْذِنَهُ»