Where to buy materials for house construction?

[PwedePadala]

By mid year, magpapaayos ako ng house. I've done my research on where to buy construction materials so I can choose the design while I'm overseas.

Madami na din palang home depot sa Pilipinas na halos kapareho ng nasa ibang bansa; one-stop shop na. Any recommendations on where to get the best deal and tips na rin sa renovation?