Your home is yours, even if you’re renting it. A landlord owns the building, but they don’t own your privacy.
Most states set a minimum of 24 hours’ notice before a landlord can legally step inside your place. Some states require 48 hours. Washington state, for example, requires 48 hours’ notice for most entry — but drops that to 24 hours if they’re showing the unit to a potential new tenant or buyer. Oregon requires 24 hours’ notice across the board. Notice requirements and whether they must be written vary by state, so it’s worth a quick search for your state’s specific law before assuming the rules apply exactly as described here.
There is one real exception: emergencies. If there’s a burst pipe flooding the unit, a fire, or something that needs immediate action to protect the property or people in it, a landlord can enter without notice or permission. That’s fair. But “I wanted to check on things” or “I was in the neighborhood” doesn’t count as an emergency.
If your landlord shows up unannounced with no emergency reason, you can calmly ask them to leave and reschedule with proper notice. Stay calm, be polite, but be clear. Document it — write down the date, time, and what happened. If it keeps happening, that may be considered harassment and could be grounds for legal action depending on your state.
Knowing this stuff before you ever sign a lease makes a real difference.