On second thought, Frankie Mañosa's "neovernacular architecture" notwithstanding, there is such a thing as Filipino architecture apart from the lowly bahay kubo - and it's richer than you thought.
Vigan bahay na bato
Other Igorot houses (ulog, etc.)
Taal bahay na bato
Catholic churches in the style of Philippine baroque (Tumauini, Isabela; Miag-ao, Iloilo), plus romanesque/neoclassical elements (Manila Cathedral), neogothic (Jaro, Iloilo), with Mexican baroque elements (Morong, Rizal), etc.
'Gabaldon' public school buildings
American-era Municipal halls
Have we forgotten those prototypes in Nayong Pilipino? - Samar, Bacolod, and Cebu bahay na bato
Aren't Muslim mosques a part of the Philippine tradition?
The plethora of present-day structures