Hello , just wondering what is the cost per feet to deepen the longkang surrounding the house. what is the average price like

Out of curiosity ...... why the need to deepen the drain ? Inside your house compound ?

there are 2 drain that needs to be deepened.. one is outside my house compound (making a report to the local council hopefully to get it deeper)

but also i need to deepen my drain inside my house compound to ensure that when its heavy rain, the drain wouldn't spill over with water as it is now. as my house is on a lower level compared to the main road.. when its raining super heavily my drain can be overfilled even though it is draining the water properly to the back of the house.

it only happen during the superbly intense rain( the one that usually are short lived) . if its only heavy rain but consistent usually it wont spill over.

For outside, it need to deepen the entire stretch, otherwise leftover water will stagnant at the deepen part.

For inside, you can built extra 1 or 2 more outlet for quick water discharge instead to deepen the existing drain and should be cheaper....any photos to share ?