To apply for a Pag-IBIG housing loan, you'll need to prepare several documents, including a completed application form, valid ID, proof of income, and a copy of the property's title. You may also need to provide additional documents such as bank statements or tax returns, depending on your financial situation. It's best to check directly with Pag-IBIG or visit their official website for a comprehensive checklist tailored to your needs. Making sure you have everything in order will help streamline the application process.