我们这里的房价越来越低

The price of houses gets lower and lower in our area.

这样就对了

应该是：
The price of our houses gets lower and lower here.
如果按你的说法，应该改为：
Our houses' price gets lower and lower here.

We are getting lower and lower house prices here.比较正宗

1主谓一致的错误
get--gets
2.重复罗嗦
in this area---here/可以把要了
3.除了楼下的2个改法，还可以这样改，很简单的。
The house's price gets/is getting more and more lower in our area.