What it costs, what's permitted, and what to ask before you hire.
Last verified: 2026-05-31 · Well-sourced
Panel / electrical
May require a panel upgrade
Permit likelihood
Confirm with your building department
Permit snapshot
plumbing + electrical permit
As of 2026-05-31, residential heat pump water heater (HPWH) installations in the City of Los Angeles typically require a plumbing permit (and an electrical permit when a new dedicated 240 V circuit is required) from the Los Angeles Department of Building and Safety (LADBS). Most like-for-like water heater replacements — including HPWH replacements where electrical capacity is already present — qualify for an LADBS Express Permit issued online via PermitLA; when a new dedicated electrical circuit must be added, an electrical Express Permit is typically included. Installations that change equipment location, require structural seismic-strap or platform changes beyond standard practice, or trigger gas-line modifications route through ePlanLA plan check. Verify current Express Permit eligibility and scope with LADBS before scheduling installation.