Is replacing cast iron drain lines worth it?
Verdict: DEPENDS — Worth it once they hit 60+ years and start showing scale. Replace proactively before slab leaks.
Cost & payback at a glance
| Typical cost range | $3,500–$12,000 |
|---|---|
| Estimated annual benefit | Non-financial (comfort / safety / resale) |
| System | plumbing |
| Scenario | general |
How HomeScore decides
HomeScore evaluates "is it worth it?" decisions across 40+ home systems using 2026 cost data, regional installer rates, lifespan modeling, and resale ROI. Every verdict on this page is anchored to the underlying replacement cost, annual operating savings, and the scenario you're in: general homeowner, in-2026 pricing, resale-driven, forever-home, or pre-1980 retrofit.