Castaic · Garage conversion permits
Garage conversion permits in Castaic
How to convert a garage conversion in Castaic: permit pathway through LA County Public Works (Building & Safety), drawings required, local watch-outs, and a free address-level wizard for your Castaic lot.
Castaic context
Castaic is unincorporated despite proximity to Santa Clarita city. Permits run through LA County DPW Building & Safety at the Santa Clarita field office via EPIC-LA. Most parcels east of Interstate 5 face VHFHSZ coverage; some hillside review on foothill parcels.
- Permit agency
- LA County Public Works (Building & Safety)
- Median lot size
- 8,200 sqft
Drawings you'll need to submit
Convert your garage into an ADU in its current footprint. No replacement parking required. Often the cheapest LA ADU path.
- Site plan (parcel layout + setbacks)
- floor plan existing
- Proposed floor plan
- Elevations (each side)
PermitPathLA generates the site plan free from your Castaic address. The other drawings come from your architect or plan firm — we list pre-approved options in the wizard.
Castaic watch-outs for garage conversion
Overlays that hit a meaningful share of Castaic lots
Very High Fire Hazard Severity Zone (VHFHSZ)~65% of parcels
Most of Castaic. Chapter 7A construction + defensible space at final.
Castaic Dam inundation area~15% of parcels
Some southern Castaic parcels sit in the FEMA-mapped Castaic Dam failure inundation area. Disclosure context.
Local quirks
VHFHSZ on majority of parcels
Roughly 2/3 of Castaic sits in the VHFHSZ. Chapter 7A construction (ember-resistant materials, sealed eaves, etc.) is mandatory.
Run your Castaic address through the wizard
We pull your parcel polygon from county GIS, apply Castaic ordinance + state baseline rules, generate the site plan, and walk you through the LA County Public Works (Building & Safety) submittal. Free, no signup.