Hi
I live in a modern house for around 6 years. Recently every time I turn on hot the water tap from any bathroom, the kitchen tap starts to vibrate and make a noise. When I go downstairs and turn the tap on, the noise stops!
I really don't know what to do! :mad:

Isolate and eliminate. When this happens, turn off shutoff valves [stops] under each fixture to isolate each fixture for repair or elimination of repair. Sounds like a washer fluttering somewhere, possibly even the kitchen. A fluttering washer typically signifies a loose screw on a washer somewhere.