# Castillo Works

_Company profile on San Diego Water Heater Guide — verified 2026-06-10._

Castillo Works is a multi-trade Chula Vista operation — plumbing, HVAC, electrical, restoration, and construction — on a verified license carrying C-36 plumbing, B general building, and C-20 HVAC classifications. Its water heater page covers tank, tankless, heat pump, maintenance, and light-commercial work and names five equipment brands. Same-day repairs and installs are advertised. The site’s “since 1993” claim predates the 2008 license, which CSLB holds as a sole ownership.

## At a glance

- **Location:** Chula Vista, CA
- **CSLB license:** #919636 C-36 (CSLB-verified)
- **24/7 availability:** —
- **Same-day service:** Yes
- **Financing:** —
- **Website:** https://castilloworksinc.com
- **Phone:** (619) 864-1432
- **Pricing:** Claims honest, upfront pricing with no hidden fees; no prices published
- **Warranty:** Claims warranties on workmanship and equipment; terms not published
- **Service areas:** Chula Vista, San Diego, National City, Santee, El Cajon, La Mesa, Bonita, Spring Valley

## Observed strengths

- CSLB license #919636 verified active with C-36, B, and C-20 classifications
- Water heater page covers tank, tankless, heat pump, maintenance, and light-commercial work with five named brands
- Multi-trade operation able to handle the plumbing, gas, and electrical sides of a job

## Ask before hiring

- The site says “since 1993” but the license issued in 2008 — ask what the earlier date refers to
- Ask for the specific warranty terms on workmanship and equipment
- No 24/7 claim appears — confirm whether emergency or after-hours service is offered

## Sources we checked

- [Castillo Works homepage](https://castilloworksinc.com) — checked 2026-06-10
- [Water heaters page (types, brands, same-day claim)](https://castilloworksinc.com/services/plumbing/water-heaters/) — checked 2026-06-10
- [CSLB license detail #919636 (Castillo Works, sole ownership, active)](https://www.cslb.ca.gov/onlineservices/checklicenseII/LicenseDetail.aspx?LicNum=919636) — checked 2026-06-10

Canonical page: https://www.sandiegowaterheater.com/company/castillo-works-inc/

## Machine-readable index

- Site index for LLMs: https://www.sandiegowaterheater.com/llms.txt
- EntityMap v1.0 (entities + sourced evidence): https://www.sandiegowaterheater.com/entitymap.json
- Agent instructions (when to use this guide): https://www.sandiegowaterheater.com/agents.md
- XML sitemap: https://www.sandiegowaterheater.com/sitemap-index.xml

_Our editorial rankings follow our published methodology. Companies cannot pay to change their editorial ranking. Some companies may pay for enhanced profiles or clearly labeled sponsored directory placements; sponsorship never affects editorial rank._

_Published by San Diego Water Heater Guide. Guide last updated June 2026._