If you want to buy in the inner city, check out your intended area late at night between Thursday and Saturday. Find out what steps the developer has taken to soundproof the apartment. You may want to spend some money yourself on special glazing, or extra wall and ceiling insulation. Your neighbour is allowed to mow the lawn and use a drill around the section. But it's usually unreasonable of them to use noisy machinery late at night.
Most noise complaints arise from the use of stereos in urban areas.
If your neighbour's party becomes too loud, goes on too late or both, phone the noise control officer at your council. The council is obliged to investigate and take action if necessary. The officer may direct that the noise be reduced for up to 72 hours. If the noise starts up again after they've gone, phone back. The officer has the power to return with the police and seize the equipment making the noise.