There are First Mortgages and Second Mortgages, the former designed to allow you to purchase the home or totally refinance the original loan; the latter, also known as a Home Equity Loan, allows you to use your available equity to take out a subordinate loan in addition to your First Mortgage.
Many powers belonging to the federal government are shared by state governments. Such powers are called concurrent powers. These include the power to tax, spend, and borrow money. State governments operate their own judicial systems, charter corporations, provide public education, and regulate property rights.
State and local governments have never been totally separate political entities, because they cooperate in services ranging from welfare to transportation, and because they serve the same residents. Nonetheless, the state has the final decision over local functions. While states are part of the larger entity of a federal system, local governments are creatures of the state. The state government can abolish a local government, merge it with other entities, or give it additional authority.