The cost “per square meter” estimate, which currently ranges from PhP 23,000 to PhP 35,000, is a rough and aggressive ballpark figure based on prevailing cost of construction in the Philippines. We use it in initial client presentations only for reference purposes, but we do not actually charge based on it.he cost “per square meter” estimate, which currently ranges from PhP 23,000 to PhP 35,000, is a rough and aggressive ballpark figure based on prevailing cost of construction in the Philippines. We use it in initial client presentations only for reference purposes, but we do not actually charge based on it.