Altadena · Solar permits
Solar permits in Altadena
How to install a solar in Altadena: permit pathway through LA County Public Works (Building & Safety), drawings required, local watch-outs, and a free address-level wizard for your Altadena lot.
Altadena context
Altadena is divided by Lake Avenue into east and west halves, with substantially different post-Eaton-Fire conditions. West Altadena was the harder-hit area; east Altadena saw lighter damage. Building permits are issued by LA County DPW Building & Safety at the Alhambra office (not at LADBS). ADU permitting in unincorporated LA County follows the state baseline (Gov Code §65852.2) implemented through LA County Code Title 22.140 — broadly similar to LADBS but with separate forms, fees, and inspectors. LA County also runs a streamlined rebuild permitting program for parcels with primary-residence loss in the Eaton Fire, including expedited ADU + primary-residence combined permits.
- Permit agency
- LA County Public Works (Building & Safety)
- Median lot size
- 8,500 sqft
Drawings you'll need to submit
Most LA rooftop solar permits issue same-day via SolarAPP+. We generate the site plan + roof plan + fire setbacks — free.
- Site plan (parcel layout + setbacks)
- Roof plan
- Panel layout diagram
- Fire-setback diagram (ridges + eaves)
- Single-line electrical
PermitPathLA generates the site plan free from your Altadena address. The other drawings come from your architect or plan firm — we list pre-approved options in the wizard.
Altadena watch-outs for solar
Overlays that hit a meaningful share of Altadena lots
Eaton Fire rebuild zone~40% of parcels
West Altadena and parts of east Altadena were significantly affected by the January 2025 Eaton Fire. LA County maintains a Recovery Permitting program with expedited review for affected parcels. ADUs are permitted alongside primary-residence rebuilds.
Very High Fire Hazard Severity Zone (VHFHSZ)~55% of parcels
Most of north Altadena (above Altadena Drive / Loma Alta) sits in the VHFHSZ. Triggers Chapter 7A construction (Class A roofing, ember-resistant venting, fire-rated assemblies) — adds roughly 7% to construction cost on top of base ADU build.
LA County Hillside Management Area~30% of parcels
Slopes over 25% in the northern foothills trigger LA County's Hillside Management Area rules — geotech / soils review, grading limits, and ridgeline-protection rules.
Local quirks
LADBS rules do not apply — this is LA County
If your contractor or designer assumes LADBS rules, stop and verify. Altadena is unincorporated LA County. Submittal goes to LA County DPW Building & Safety in Alhambra, not the LADBS Van Nuys or Downtown office. The codes are similar but the forms, fees, inspectors, and online portal (EPIC-LA, not LADBS PermitLA) are all different.
Post-Eaton-Fire rebuild lots have additional verification steps
If your lot had primary-residence fire damage in January 2025, the rebuild permit requires environmental clearance (debris removal verification, soil testing for ash residue) before the building permit is finalized. Most lots have already completed this through Phase 1 + 2 county debris removal — but always verify your parcel's status with LA County Recovery before paying for plans.
Altadena Library District is independent
Heads-up that the Altadena Library District is not part of LA County Library. It's a separately governed special district (a quirk dating to 1926). The two libraries on Mariposa and Lincoln are Altadena Library District; LA County Library cards are not interchangeable.
Pasadena Unified covers Altadena schools, not LA Unified
Even though Altadena is unincorporated, the school district is Pasadena Unified (PUSD) — not LAUSD. PUSD school facility fees apply to ADUs over 500 sqft.
Eaton Canyon Natural Area + trails are partially still in recovery
Eaton Canyon Falls trail and surrounding county trails were heavily damaged by the Eaton Fire. Sections have reopened in stages through 2025–26. If you're using Eaton Canyon access as a selling point for a future ADU tenant, verify current trail status with LA County Parks.
Run your Altadena address through the wizard
We pull your parcel polygon from county GIS, apply Altadena ordinance + state baseline rules, generate the site plan, and walk you through the LA County Public Works (Building & Safety) submittal. Free, no signup.