Finally, know that, like any trend, the popularity of certain architectural style waxes and wanes. Use your knowledge of these to determine when your own home was built. Italianate style was an 1850s favorite; Colonial Revival was all the rage in the 1890s; and by the 1900s, Craftsman-style houses had started cropping up everywhere. Not sure where to begin researching? You can always consult a professional architectural investigator for help.