Translation:If I were you, I would buy a coastal house.
Most English speakers would probably not say "coastal house". "Near the Coast" or "on the coast" would be more likely.
Or even "along the loast" or "by the coast", either way though, it's technically not incorrect.
In China, they are relocating people away from the coast. In the states, developers are building even more along the water and selling to rich (but stupid) people.