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Is rainwater harvesting mandatory for your building in Assam?

Mandatory for every building (2022 bye-laws); earlier Guwahati rule: buildings of 100 sq m and above. Answer a few questions about your plot to see whether it applies to you.

Common buildings in Assam

The answer for typical plots, new buildings, roof taken as 70% of the plot. Use the checker for your own sizes.

Building	Answer
House on a 100 sq yd (gaj) plot	Mandatory
House on a 200 sq yd plot	Mandatory
House on a 300 sq yd plot	Mandatory
Villa on a 500 sq yd plot	Mandatory
Apartment block on 1,500 m²	Mandatory
Shop or office on 400 m²	Mandatory
School on 4,000 m²	Mandatory
Factory on 10,000 m²	Check locally

For an existing building, tick the box in the checker: most rules are written for new buildings.

The rule in Assam

The Assam Unified Building Construction (Regulation) Bye-laws, 2022 say every building must have one or more rainwater harvesting structures for rooftop runoff. They apply in master-plan and notified planning areas, except Autonomous Districts. Guwahati has required RWH since its 2014 building bye-laws, and earlier GDA bye-laws set a 100 sq m threshold.

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Rainwater harvesting cost in Assam

Pick your district for the price of a recharge system for your building.

Frequently asked questions

Is rainwater harvesting mandatory in Assam?

Mandatory for every building (2022 bye-laws); earlier Guwahati rule: buildings of 100 sq m and above. The Assam Unified Building Construction (Regulation) Bye-laws, 2022 say every building must have one or more rainwater harvesting structures for rooftop runoff. They apply in master-plan and notified planning areas, except Autonomous Districts. Guwahati has required RWH since its 2014 building bye-laws, and earlier GDA bye-laws set a 100 sq m threshold.

Is rainwater harvesting mandatory for a 200 gaj house in Assam?

Yes, rainwater harvesting is mandatory for your building. Assam Unified Building Construction (Regulation) Bye-laws, 2022 (gazette 15 Oct 2022) covers every new house in Assam, whatever its size.

How do I check if my building in Assam needs rainwater harvesting?

Enter your plot area, roof area and number of floors in the checker on this page, in square feet, square yards (gaj) or square metres. It compares them with Assam's rule, Assam Unified Building Construction (Regulation) Bye-laws, 2022 (gazette 15 Oct 2022), and tells you whether it applies and why.