Your camera's light meter will notice that the majority of the frame is dark, with a few bright areas. It will naturally attempt to increase the exposure to "improve" the exposure in the dark areas. This will end up over-exposing the brighter areas and, frankly, since it's a night shot, the dark areas SHOULD be dark (or black.)
The point is, the camera will suggest a brighter exposure than you should use. Whatever the light meter tells you use, adjust the exposure a few stops below the camera's suggested exposure. If shooting manual this is easy to do. But if shooting in any of the semi-automatic (e.g. aperture priority or shutter priority modes, or using the "program" mode) then set the camera's exposure compensation to a value of a negative value (e.g. -2, etc.)
As you'll be using a tripod the mode you probably should use is aperture priority and then set an f-stop for a broad depth of field. I might shoot it at f/11 or maybe even f/8. Since it wont be possible to take a hand-held shot, you'll use a tripod. And since you'll be using a tripod, the rule is that if the camera isn't moving (and it wont be if you have a solid tripod) and since the scene isn't moving (buildings should hopefully not be moving while you're doing this and, if they are, run for cover... you're having an earthquake) that means you can leave the shutter open as long as you like. Set the camera to a low ISO (to eliminate noise), set the camera to an f-stop that provides a broad depth of field, set the exposure compensation to tell the camera to deliberately under-expose the shot (e.g. -2 is probably a good "starting" point, but you may need to go even darker) and then let the shutter speed be whatever the camera wants to use.
Incidentally, some people like city shots when the sky is not black yet... e.g. shoot maybe 20 minutes after sunset so you have a dim dusky blue sky and yet all the city lights will be on. If you do this, point the camera at the sky to take the light meter reading and set the exposure for the value needed to give the sky a rich blue color.