Questions › Category: Rainwater › Is Rainwater Harvesting only feasible for new buildings ? 1 Vote Up Vote Down Rinckle Gohil asked on 5 March 2018 1 Answers 1 Vote Up Vote Down Best Answer Team GreenSutra® Staff answered on 5 March 2018 No. While Rainwater Harvesting can be easily integrated into newer buildings and societies, old buildings and societies can also harvest rainwater. This can be done by either modifying the existing systems or installing new systems.