The quick answer is no and all responsibilities(for both landlord and tenant) should be laid out in the formal lease document. It can get quite convoluted depending on the type of building, number of tenants, and use of space so a clear definition is preferred.
As a few guides only...in a NNN lease, maintenance usually(but not necessarily) will involve upkeep of property grounds, major systems(plumbing, HVAC, electric etc), roof, and foundation. If a single tenant It will generally not include(again usually) interior cleaning, toilet issues, floor mopping, filter changes, etc in the actual leased space. If a multi-tenant building with a lot of interior common area these items may be included as maintenance for the entire building.
I tell our tenants during lease negotiations, that as a guide, the landlord takes care of the issues in the walls, foundation, or roof; the tenant is responsible for the inside (cleaning, unclog toilet, change lights, filtes, etc)
May 13, 2013