The average national cost to have a professional plumber replace an existing kitchen garbage disposal typically ranges between $250 and $600 in total, covering both the labor service charge and the hardware price of a standard residential unit. If you purchase a high-end, heavy-duty 3/4 HP or 1 HP quiet disposal model and require complex under-sink plumbing modifications or electrical work, the total professional replacement cost can easily reach $700 to $1,000.
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