1. In the lease agreement itself a clause is ordinarily inserted which states that wherenever the landlord wishes, he can enter in to the leased premises during day time after informing the leasee.
2. Is there are such claose mentioned in your lease agreement?
3. When 3 weeks time is too long a period, you can inform him that you want to enter in to the leased premises with in 24 hours from the time of his receipt of your notice for conducting inspection of status of your premises.
4. If he refuses your entry, you can approach the Court and get an order directing the leasee to allow your entry whenever you so want on receipt of a 24 hours notice hence forth and also directing the police to give you protection while conducting such inspection of your leased premises.
5. You shall have to appoach the local Civil Court.
6. Alternatively, to make a short cut to the solution, you can lodge a police complaint for the leasee's refusing your entryb to your leased premises seeking police help and in case of police failure, file a writ Petition before the High Court against police inaction making the leasee as the private party, praying for an order upon the leasee to allow your entry on receipt of 24 hours notice and polioce to accompany you during all such visits.
7. On receipt of favourable order from the High Court, you can conduct such inspection any tiome you wish to after giving 24 hours notice to the leasee.