High Utility Bills for Landlords and ADU Owners: What to Check Before Passing Costs to Tenants

Separate the utility problem from the lease problem

A high bill may come from usage, leaks, estimated readings, account errors or rate changes. Determine why the bill increased before deciding what to do with the tenant's payment obligation.

A billing spike does not automatically change the lease.

Review the utility language in the rental agreement

Identify which utilities are included, which are tenant-paid, and whether any reimbursement or allocation formula is already documented. If the agreement is silent, do not invent a new method without checking the applicable rules.

Check rent-control and notice requirements

A new mandatory utility charge can interact with rent-control or tenant-protection laws. Verify the exact jurisdiction and tenancy before implementing a new charge.

Fix the source of the cost when possible

Leaks, common-area waste, equipment problems and billing errors can create recurring costs. Solving the underlying problem may be more effective than simply shifting the expense.

Communicate the change clearly

If a lawful change is being considered, explain the amount, calculation, effective date and supporting lease or legal basis in writing.