Answer
(Fatwa: 687/650=L-1429)
Your question is not clear but I tell you the basic Islamic ruling about the matter, in the light of it you can apply your case.
(1) The land purchased for business and the intention is same till the end, zakah is obligatory on its price provided it is equal to nisab and a year should pass on its purchasing.
(2) If the land was purchased with the intention that he would sell it in case of profit, then zakah is not obligatory.
وتشترط نية التجارة في العروض ولابد أن تكون مقارنة للتجارة فلو اشترى شيئا للقنية ناويا أنه وجد ربما باعه لا زكاۃ علیه (الأشباه و النظائر)
(3) The land was purchased for business but latter on, the intention was changed into building a house on it or using it for another work, the even this case, zakah is not obligatory. Order for zakah will be abolished on mere changing the intention.
لو نوى فيما كان للتجارة أن يكون للخدمة كان للخدمة وان لم يعمل بخلاف عكسه لأن التجارة عمل فلا تتم بمجرد النية والخدمة ترك التجارة فتتم بها (الأشباه والنظائر)
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband