Several houses here share one long roof line. Each house has its own slab, split by a party wall. From the lane it looks like one terrace. Modules stay on your side of that wall. The visit from Madipakkam is free.
Rails stop at the party wall. They do not bridge onto the neighbour's slab, and the neighbour is not asked to sign a roof that is not theirs. We mark the open concrete on your side, leave the tank and a walkway, and see whether that area matches the daytime bill. A house that stands alone, with no shared wall, is an ordinary survey.
One slab used by two families, where both must sign, is the Kovilambakkam case. A narrow plot that holds only one row is the Adambakkam case. A car porch under the upper slab is the Kelambakkam case. An old sheet over the rooms is the Siruseri case. A neighbour's floor still rising is the OMR case. A flat cannot take the common roof of a large block. That is the Sholinganallur case. If the lane floods when the lake rises, delivery waits. That is the Keelkattalai case, not the first line here. City-wide module choice is on panels for a Chennai home.
The concrete on the owner's side of the party wall is the only place we draw a row.
A full plant for a Chennai home is described on the solar installation page. The visit is free, and nothing is ordered until you ask. The desk is open monday to saturday, 9:00 am – 7:00 pm.