Maintainance handover from promoter

Our building is a leased property.

We paid 3000 per sqft to lease it and now we are paying 1 INR per month for the same.

But maintenance charge is very high which is 3 INR psqft.

Out of 120 offices , almost 80 sold off.

We want to take over the maintenance from the promoter .

Is it possible ?If yes, how should we go ahead with it ?