1.5 million appreciation on a 1 million house?Howwww??

[Vaishal Patel]

So i was watching this tv show on hgtv called "My House Is Worth What"?,and this guy bought a house for about 1 million dollars,he did few renovations and improvements and its value appreciated to 2.5 million dollars..How is this possible?Is this even possible in real life or only tv shows?Just curious :)

Btw heres the link if you want to see it(episode name:cash for kitchen):Video is divided into 3 stories,the part i am talking about starts at about 14:00

http://www.hgtv.com/hgtv32/videos/index.html