ADU construction in Castaic
Castaic is LA County unincorporated territory north of Santa Clarita; most hillside parcels sit in the Very High Fire Hazard Severity Zone with LACDPW plan-check.
Start your Castaic scope — Baily asks the right questions.
Pre-seeded for adu construction in Castaic. Mention your lot, your timeline, and any known constraints — Baily factors the la permit queue and WUI fire-zone into the scope.
ADU construction in Castaic — scoped by Baily, built by NP Line Design.
Who is Baily?
Baily is named after Francis Baily — an English stockbroker who retired at 51, became an astronomer, and in 1836 described something on the edge of a solar eclipse that nobody had properly articulated before: a string of bright beads of sunlight breaking through the valleys along the moon's rim.
He wasn't the first to see them. Edmond Halley saw them in 1715 and barely noticed. Baily's contribution was clarity — describing exactly what was happening, in plain language, so vividly that the whole field of astronomy paid attention. The phenomenon is still called Baily's beads.
That's what we wanted our AI to do. Every inbound call and text has signal in it — a homeowner's real question, a timeline, a budget, a hesitation that means “yes but.” Baily listens to every one, 24/7, and finds the beads of light.
Baily was a businessman before he was a scientist. That's our vibe too.
Questions LA homeowners actually ask
ADU construction in Castaic, ZIP 91384, typically ranges from $183,600 to $459,000. Costs can vary based on size, finishes, and specific site challenges, especially for hillside parcels within the Very High Fire Hazard Severity Zone requiring additional fire-resistant materials and engineering.
Nearest neighborhoods
Same service, adjacent markets.
Other projects we scope in Castaic
Related resources
Cost guide, LA rules, and decisions to make before you call.