Well Repair vs. New Well: Cost Comparison Guide

When to repair your existing well vs. drilling new. Cost analysis and decision factors.

The Repair vs. Replace Decision

Every well owner eventually faces this question: should I repair my existing well or invest in a new one? The answer depends on your well's age, condition, the nature of current problems, and long-term economics. A 25-year-old well with a failed pump is almost always worth repairing—pumps are expected to wear out while the well itself has decades of life remaining. But a 50-year-old well with corroding casing, declining yield, and repeated repairs may be telling you it's time for replacement. Understanding the difference between normal maintenance and signs of fundamental decline helps you make smart decisions about where to invest your money.

Common Repairs and Their Costs

Most well repairs fall into manageable cost ranges. Pump replacement runs $1,800-$5,500 in San Diego County and is the most common major repair. Pressure tank replacement costs $300-$800. Electrical repairs including control boxes, wiring, and pressure switches typically run $200-$600. Well cleaning and rehabilitation to address declining flow ranges from $1,500-$6,000 depending on the method required. Annual maintenance and water testing costs $200-$400. These repairs, even the expensive ones, are typically worth doing on wells under 40 years old with no structural issues. The key is whether repairs restore reliable function for years to come.

When Replacement Makes More Sense

Several situations favor drilling a new well over continued repairs. If your well casing has corroded to the point of structural compromise, repair isn't really possible—patching a deteriorating casing is temporary at best. When well yield has declined below 3 GPM (the minimum for most households), rehabilitation may not restore adequate flow if the aquifer in that location is depleted. If your well was drilled before modern construction standards, it may have design issues that make proper maintenance impossible. And when you've spent $5,000-$10,000 on repairs in recent years with problems continuing, the math starts favoring a new well.

The 50% Rule: A Practical Guideline

A useful rule of thumb: if proposed repairs cost more than 50% of a new well, strongly consider replacement. For San Diego County, this means repairs exceeding roughly $15,000-$20,000 should trigger serious evaluation of drilling new. This isn't absolute—a $12,000 rehabilitation on a 20-year-old well with decades of life remaining makes sense, while a $8,000 repair on a 60-year-old well with other issues might not. Consider the repair as an investment: how many years of reliable service will it buy? Divide the repair cost by expected years of additional service to calculate your annual cost of continued operation.

Professional Assessment: Let SCWS Help You Decide

The repair vs. replace decision is too important to guess at. SCWS provides comprehensive well inspections that assess casing condition, yield, water quality, pump performance, and overall system health. We'll give you honest recommendations—we don't push new wells when repairs make sense, and we won't keep repairing a well that should be replaced. Our inspections typically cost $350-$500 and provide a detailed report of findings with repair estimates and, if relevant, new well projections. This relatively small investment helps you make an informed decision about potentially tens of thousands of dollars. Contact SCWS to schedule your well assessment.

We service all major pump brands including Franklin Electric, Grundfos, Goulds (Xylem), and Sta-Rite (Pentair). Our trucks carry common parts and components for same-day repairs.

Frequently Asked Questions