Questions › Category: Rainwater › Is Rainwater Harvesting only feasible for new buildings ? 1 Vote Up Vote Down Rinckle Gohil asked 8 years ago 1 Answers 1 Vote Up Vote Down Best Answer Team GreenSutra® Staff answered 8 years ago 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.