“Lior is very personable and has many decades of construction experience. We appreciated his sincere evaluation of our project.”
Ann AnterasianHouzz · April 2019
ADU construction · Calabasas, CA
Calabasas ADUs Built for
Hillside, Oaks, and HOA
The city's own permit path, mountain-terrain development standards, protected oaks, and HOA review — a Calabasas ADU succeeds by planning all four early. CSLB #972213.
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CSLB LicensedLicense #972213
5.0 on Houzz17 verified reviews
Family-OwnedLicensed since 2010
24-Hour ResponseFree in-home estimate
Oak & HillsideCity + OS&HO · in-house
Why Hillstar
How Hillstar Handles Calabasas
Calabasas layers more review on an ADU than almost anywhere in the region. Ordering those layers correctly is the whole game.
City of Calabasas Permits
Community Development's Building & Safety runs plan check and inspections — LA plans and programs don't transfer. We draw for the Calabasas path.
Hillside Standards Engineered
The Hillside & Mountainous Area Development Standards govern grading, height, and pad geometry on most parcels; we design inside them from sketch one.
Oak Ordinance Respect
Calabasas protects its oaks stringently. Arborist review and envelope adjustments happen at design, never as a framing-stage crisis.
HOA Track Managed
Calabasas Park, The Oaks, Saratoga Hills, and their neighbors run architectural review parallel to the city's. We file both together.
Fire-Zone Construction
Much of the city sits in mapped fire-severity zones, making ignition-resistant assemblies and defensible space the working baseline.
Whole-Project Ownership
Feasibility, drawings, dual approvals, construction, inspections — one team, one contract.
Our process
Four Stages to a Calabasas ADU
Reviews stack here, so we run them concurrently.
1
Feasibility & Constraints Map
Slope, oaks, fire-zone status, HOA covenants, and utilities assessed on the property.
2
Design & Parallel Filings
City submittal and HOA architectural package prepared and filed together.
3
Build
Our crew executes foundation through finish with the city's inspections met on time.
4
Deliver
Final approvals, walkthrough, and a written workmanship warranty.
Local conditions
Permits, Lots & What's Specific to Calabasas
Calabasas is an incorporated city with its own building department — and a lot of the city sits in the Santa Monica Mountains, which makes hillside review, oak protection, and wildfire compliance the dominant design factors here. State ADU law applies; the local path looks different from anything in the Valley.
Permit jurisdiction
City of Calabasas Community Development — Building & Safety — issues every Calabasas ADU permit. LADBS does not. The LA City Standard ADU Plan Program is not accepted; designs must be drawn for the Calabasas code path. Inspections schedule directly with the city, not through the LADBS volume cadence.
Lot & zoning patterns
Calabasas Park, Mountain View Estates, and Saratoga Hills tend to large hillside parcels with HOA covenants on top of city zoning. Old Topanga and Calabasas Highlands run to deeper rural-feel lots that can accept large detached ADUs but often involve longer driveways, septic considerations, and access width review. Garage conversion is a clean play on the flatter R-1 enclaves where the existing structure is conforming.
Design overlays you'll see here
Calabasas Hillside & Mountainous Area Development Standards apply on most parcels — grading limits, height envelopes, and pad geometry are real constraints. The Calabasas Oak Tree Ordinance protects oaks beyond LA's; any work inside the protected zone routes through arborist review and a tree-protection plan. A large share of Calabasas sits inside California Fire Hazard Severity Zones, so Chapter 7A WUI assemblies (Class A roof, ignition-resistant siding, ember-resistant vents) and defensible-space compliance are the working baseline on most parcels. HOA architectural review is the rule, not the exception.
Design examples
ADU Design Examples
Examples of ADU styles and layouts.
Reviews
Homeowners on Working With Hillstar
Verified Houzz reviews from Hillstar Construction clients.
“Lior is a fantastic general contractor. He has tremendous work ethic and strong attention to detail.”
J. GlaserHouzz · June 2017
“Hillstar's crew was courteous, prompt, and worked hard to make every detail exactly what we wanted.”
Hillstar ClientHouzz · Verified
5.0 · 17 verified reviews on Houzz
FAQ
Calabasas ADU — FAQ
City permitting, hillside and oak rules, HOA coordination, fire-zone construction, and budgets.
What's the permit path for a Calabasas ADU?
Through the City of Calabasas — its Community Development department runs Building & Safety, and inspections schedule directly with the city. State ADU law still guarantees the right to build; the local path defines how. LA's pre-approved plan program has no standing here.
How much do the hillside standards matter?
On most parcels, a lot. The city's Hillside & Mountainous Area standards constrain grading, height envelopes, and pad shape, which is why we design the unit to the terrain rather than flattening terrain for the unit. Done that way, the review moves smoothly.
There are oaks near where we'd build. Is that fatal?
Rarely fatal, always material. The Calabasas oak ordinance protects the trees and their root zones beyond what LA requires, so an ADU near canopy gets an arborist's review and often an envelope shift. Solved at design, it's routine; ignored, it stops projects.
Does the HOA have to approve too?
In most Calabasas communities, yes — architectural committees review exterior design on top of the city's plan check. The reliable approach is preparing both packages at once, which we do, so approvals converge instead of queueing.
What about wildfire requirements?
Large parts of Calabasas sit in mapped fire-severity zones, where the building code requires Class A roofing, ember-resistant vents, ignition-resistant exterior materials, and defensible-space compliance. We build to that standard wherever the parcel's classification requires it.
How do costs run here?
Higher-engineering lots and dual review put Calabasas above flat-tract pricing, and finish level does the rest. You'll see it all in an itemized written quote after feasibility — including the hillside, arborist, and HOA line items — before anything is committed.
Also serving Calabasas
Nearby ADU neighborhoods
Map Your Calabasas Lot's ADU Potential
Free feasibility visit — terrain, oaks, HOA, and a written read on what the parcel supports.