### Question
How does NATIONAL PARKS, MILITARY PARKS, MONUMENTS, AND SEASHORES define improved property?


### Answer
Under *16 U.S.C. § 460x*, **improved property** is defined as:

> a detached, one-family dwelling, construction of which—


(1) was begun before December 31, 1964, or


(2) for the purposes of section 460x–9(b) or (d) of this title, was begun on or after December 31, 1964, and before October 21, 1970, and has been openly and continuously used, at least during the summer months of each year when similar dwellings in the area are used, as a residential dwelling since such construction was completed, and with respect to the portion of such period after any acquisition of such property by the United States, by the owner, or a member of the immediate family of the owner, of such dwelling on the date of such acquisition,


  

together with so much of the land on which the dwelling is situated, such land being in the same ownership as the dwelling, as the Secretary shall designate to be reasonably necessary for the enjoyment of the dwelling for the sole purpose of noncommercial residential use, together with any structures accessory to the dwelling which are situated on the lands so designated

#### Citation:
  - *16 U.S.C. § 460x*
  - Heading: **CHAPTER 1-NATIONAL PARKS, MILITARY PARKS, MONUMENTS, AND SEASHORES > SUBCHAPTER LXXXII-SLEEPING BEAR DUNES NATIONAL LAKESHORE**

