Before you purchase a condominium policy, check with your condominium association to make sure you’re buying the insurance you need.

• Find out what parts of the interior are covered by your condo association’s insurance and what items are your responsibility. Then make sure that you have adequate insurance to cover repairing or replacing the items for which you are responsible.
• The contents of your condominium are not insured under the association’s master condominium policy. So, estimate the cost to replace your contents and buy insurance for that amount.
• Your association’s master condominium policy does not provide any liability coverage for your unit or your personal exposures. So, make sure you purchase adequate liability insurance, usually $300,000 to $500,000 or more, depending on your situation.
• If your association has insufficient funds, you may be assessed a proportionate share to pay for damage to your building and other situations. Check to see whether the condominium insurance you purchase covers these assessments. You may wish to buy Loss Assessment Coverage, which is available in amounts of $5,000, $10,000 or more.

Source