Most cases we miss out future requirements and facilities for the same.
1. Wifi access points - initially considered in offices only but now at home its must to get wifi signal in all the rooms.
2. Gail gas is already happening in all the layouts and very soon it will be across bangalore including out skirts. There should be pipe laid and kept ready other wise you end up breaking you parking flooring.
3. Connecting solar to gyser is always good , since gyser will be automatic it will add temperature if needed otherwise it won't waste power . But you will have a drop in the pressure just in case you are opting for concealed diverters
4. Car wash point can be direct bore motor connection so it will give you equivalent pressure as professional car wash machine

Regards,
Ar.Praveen.N
Ardes Architects and Interior designers
ardesarchitects@gmail.com
www.ardesarchitects.com
https://www.facebook.com/ardes.architects