Water Heater Replacement Cost Estimator
Pick your unit type and check any code add-ons — get a low-to-high installed-cost band for Orange County.
Orange County, CA · Updated 2026 · Ranges from our cost guides — your quote will vary by contractor and scope
How this calculator works: it combines the cost bands published in our Orange County cost guides with a few choices about your project. The output is a range — low, typical, high — with the assumptions listed. It is a planning tool, not a contractor bid.
Your project
Bands are Orange County installed ranges, grounded 2026-10-15 (suburbanplumbingoc / paylesswaterheaters).
What drives the cost
- Unit type — gas tank 40/50 gal: $1,500–$3,700 installed; tankless: $4,000–$6,500 installed (OC bands, grounded 2026-10-15). Same-day swaps on standard 40/50-gal gas tanks run cheapest.
- Expansion tank — required by code on most OC installs; ~$150–$400 adder when not already present.
- Earthquake straps — double straps are CA plumbing code; ~$75–$150 when missing.
- Venting — upsizing from 40 to 50 gal, or gas tank to tankless, usually forces venting rework (~$200–$600).
- Tankless premium — gas-line upsizing, dedicated venting, and condensate drainage push tankless into the $4,000–$6,500 band; payback comes from efficiency, not purchase price.
Estimate, not a quote
These numbers are estimates only — not a quote, not a bid. Bands are computed from the cost ranges published in our Orange County cost guides (2026), which are themselves compiled from contractor-published pricing and industry data. Your actual price depends on scope, materials, access, timing, and the contractor. Always get 2–3 written quotes and compare the scope line by line, not just the total. We don't sell services and we have no contractor relationships.