Property taken on Lease for commercial purpose

20 years back, I leased a shop. The shop was owned jointly by 2 people signing the lease agreement as lessors or the 1stparty and myself as lessee was the 2ndparty. In lease it was written that "SECOND PARTY IS AT LIBERTY TO MAKE ANY ADDITION, ALTERATION IN THE DEMISED PREMISES AND THE FIRST PARTY SHALL HAVE NO OBJECTION FOR THE SAME" . Later one owner sold his undivided share to me. But, the other owner sold his share to a new guy. Subsequently new guy conveyed to me that he is new owner and thus be treated as lessor and be paid the rent. Since then, I've been paying him rent for half share. With time relations between us have soured. We are not on talking terms and rent is sent by post. Now i want to renovate. If i ask permission then other owner will object. Can I renovate on basis of clause in lease that SECOND PARTY IS AT LIBERTY TO MAKE ADDITION/ALTERATION. As new person acquired ownership after the lease so is he bound by terms. Can we move without worry that he will stop us.