About this site and how we verify every figure
Last verified: November 11, 2026
This site is published by DuloCore, a California home-energy rebate service, to answer one question well: what a water heater costs in San Diego, starting from the cost estimator. It is written and checked by the DuloCore research team.
Who we are
DuloCore helps California households find and claim home-energy rebates. We built this small site to stand on its own: the estimator, the rebate status list and the permit steps work without signing up for anything. We are not affiliated with SDG&E, San Diego Community Power, the City or County of San Diego, or the Contractors State License Board. We do not name or rank installers on this site.
How we verify every figure
- Rebate amounts come only from DuloCore's verified program catalogue. Before printing one, we open the official program page on the same day and confirm the amount and status in its text. If the official page disagrees with our catalogue or will not load, we leave the amount out and tell you to check the program page.
- Closed programs are labeled as ended, because many older articles still describe them as open.
- Federal tax credits are checked against IRS guidance. The 25C credit does not apply to equipment placed in service in 2026.
- Cost ranges come from cost publishers we loaded on the verification date, cited next to each figure with the publisher's own update date. We do not invent local multipliers.
- Permit fees come only from the City's official fee bulletin, quoted with its revision date.
- Legal requirements such as earthquake strapping are checked against the code text.
Every page ends with a list of the sources it uses and the date we accessed them.
Last verified
All pages were last verified on November 11, 2026. Programs change during the year, so when a page and an official program page disagree, the official page wins.
Corrections
If you find a wrong figure, email support@dulocore.com with the page and the source that shows the correct number. We fix verified errors within 7 days and update the "Last verified" date on the page.
Contact
Email support@dulocore.com. We cannot give tax or legal advice, and we are not a contractor, so for a firm price get written bids using the installer checklist.