In many cases the responsibility for maintaining the sidewalk next to a property falls on the adjacent property owner. The exact rules can depend on property type and circumstances.
The general rule
Adjacent owners are commonly expected to keep the sidewalk in a safe condition. This is general information, not legal advice, and specifics should be verified with official sources.
Where it can differ
Certain property types and situations can change who is responsible. When responsibility matters for a decision, confirm it through the appropriate agency.