Building permits etc

[walesrob]

What is the procedure if we want to build an extension to our house in the Philippines? I assume that we need a building permit. Do we need to submit plans or just an outline description of the works. Anyone know what the fees are?

As I say, this is just an extension not a new house build.

Thanks

I'd like to have a definitive answer as well, as Elsa's brother, who is a builder tells us we can just knock up an extension on our house without the need for any permits whatsoever. The reason is that because you own the plot, you can do what you like with it.