Replacing an existing residential sump pump typically costs between $300 and $800 for standard equipment and professional plumbing or waterproofing installation labor. If you choose to purchase a high-end submersible cast-iron pump with a dual float switch system, equipment costs alone range from $200 to $400. Hiring a professional contractor adds $150 to $400 in labor fees, which can increase further if the discharge piping or check valve must also be replaced. Verification: Obtain itemized written estimates from professional waterproofers before scheduling replacement work.
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