Garage Conversion ADU in Calabasas - One Fixed Price, Permits Handled

Fast, Reliable Garage Conversion ADU Across Calabasas

Garage conversion ADUs in Calabasas typically run $95,000-$175,000 all-in, drawings through final inspection, with most attached garage conversions landing in the lower half of that range and detached structures climbing higher due to Chapter 7A fire-resistant material requirements. We’re Nadia Ellery’s team at Ellery ADU Studio, and we coordinate Calabasas ADU Design & Permitting, construction from our Los Angeles office with crews serving Calabasas directly. If you’re in The Oaks, Mulwood, or anywhere off Las Virgenes Road, we know the specific approval path your project faces - and we schedule around it so your garage isn’t sitting half-framed through a Santa Ana wind event. Call (424) 523-8492 to schedule your free estimate.

Call (424) 523-8492

Why Ellery ADU Studio Van Nuys Is Calabasas’s Preferred Garage Conversion ADU Company

We’ve designed, permitted, and built more than 900 ADUs since 2015, the year California’s ADU laws shifted, and a significant share of those have been in Calabasas and the surrounding Santa Monica Mountains foothills. Our Garage Conversion ADU team understands the difference between an LADWP permit path and the Las Virgenes Municipal Water District’s separate sewer capacity review - a distinction that blindsides general contractors coming up from the San Fernando Valley floor.

Calabasas homeowners find us through referral and repeat search because we put the price in writing before any work starts, per Haven Standard Clause 1. No “call for a quote.” No range that widens once you’re committed. Our license number appears on every page, our crews are background-checked and uniformed, and a live person answers calls 24/7. When you’re navigating both a gated HOA’s architectural review board and the city’s VHFHSZ fire-zone requirements, you need a single point of accountability - not a designer and builder pointing at each other when the stucco color gets rejected.

Dispatch and scheduling are coordinated from our Los Angeles office, with crews serving Calabasas locally. Most Calabasas homeowners who contact us already have a written estimate in hand from another firm; we offer a Free Second Opinion on any written estimate, and we frequently find that the competing bid missed the Chapter 7A material upgrade or the HOA review timeline entirely.

Our Garage Conversion ADU Services in Calabasas

Attached Garage Conversion

Attached garage conversions are the most common ADU we build in Calabasas, particularly in the gated communities off Mulholland Highway and Park Granada where three-car garages are standard. Because the structure shares a wall with the primary residence, these conversions typically avoid the full Chapter 7A trigger - but any new exterior cladding, roof modification, or vent penetration still needs ember-resistant detailing if your parcel sits in the VHFHSZ. We handle the permit set, the Las Virgenes sewer capacity review, and the HOA submittal as one package, sequenced so rough framing starts only when materials are on-site and approved.

Detached Garage Conversion

Detached garage conversions in Calabasas face the full Chapter 7A requirement: Class A roof assembly, ember-resistant vents, ignition-resistant cladding, and often fire-rated glazing within ten feet of the property line. In neighborhoods like The Oaks of Calabasas or Calabasas Park Estates, the HOA architectural review board will also scrutinize massing, roof pitch, and material match to the primary residence. We specify James Hardie Artisan siding and other ignition-resistant products that satisfy both the fire code and typical HOA palettes, and we submit the architectural review packet concurrently with the city permit set to compress the calendar.

Carport Conversion

Carport conversions are less common in Calabasas than in older San Fernando Valley neighborhoods, but they appear in some 1980s and 1990s tract plans off Las Virgenes Road. The challenge here is structural: most carport slabs lack the depth and reinforcement for enclosed living space, and the open-sided roof structure needs complete rebuild to meet energy code and fire-zone requirements. We assess the existing slab, engineer a foundation solution if needed, and design the enclosure as either a full ADU or a Garage Conversion ADU in Calabasas with storage remaining - your choice, priced in writing before we start.

Garage Partition & Bathroom Add

Many Calabasas homeowners don’t need a full ADU. They want the garage partially retained for storage, with a studio, bathroom, or guest suite carved out of the remaining space. We call this a garage partition with bathroom add, and it’s particularly popular for homeowners whose adult children need occasional housing or who want rental income without sacrificing all parking. The bathroom triggers the Las Virgenes sewer capacity review, which adds three to six weeks that LADWP customers never see. We file that review immediately upon contract signing, before drawings are finalized, so it never sits on the critical path.

Garage JADU

A Junior ADU - a JADU - is carved from existing living space, not new construction, which changes the regulatory math. In Calabasas, a garage JADU must be within the walls of the primary residence or an attached garage, cannot exceed 500 square feet, and requires owner-occupancy of either the primary or the JADU. The advantage: no separate utility connection, no sewer capacity review, and typically no Chapter 7A trigger if you’re not altering the exterior envelope. We handle the zoning verification, the floor plan, and the owner-occupancy affidavit as part of our standard permit set.

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Trusted Brands We Service in Calabasas

Ellery ADU Studio specifies and coordinates prefab and modular systems from Abodu, Cover, and Dvele, among others, but in Calabasas we find that brand fluency matters most when the HOA architectural review board rejects a cookie-cutter solution. The Oaks, Mulwood, and similar communities require material and massing match to the primary residence - tile roof profiles, stucco texture, specific trim details - which is why we also specify James Hardie Artisan siding and other ignition-resistant products that can be customized to the HOA palette. Whether we’re building stick-frame or coordinating a panelized system, everything moves under one contract at one written price, with no designer-versus-builder blame gap.

Common Garage Conversion ADU Problems We See in Calabasas Homes

• VHFHSZ material upgrades missed in the initial bid. Contractors unfamiliar with Calabasas bid garage conversions as simple interior remodels, then hit the homeowner with a $15,000-$30,000 change order for Chapter 7A ember vents, Class A roofing, and ignition-resistant cladding. We price these materials from the first written quote - Haven Standard Clause 1, no exceptions.
• HOA architectural review treated as a formality. In The Oaks of Calabasas and similar gated communities, the architectural review board runs 60-90 days and will reject color, finish, or massing mismatches on the first pass. We build the sample board and material submittal into our standard process, and we sequence construction so framing starts the week approved materials arrive.
• Las Virgenes sewer review filed late or not at all. The Las Virgenes Municipal Water District serves Calabasas instead of LADWP, and its separate sewer capacity review can add three to six weeks. Contractors who don’t know this file with the city alone, then discover the utility hold when the inspector won’t sign off. We file concurrently with the city permit application.
• Build sequencing that leaves the structure exposed through Santa Ana season. Fall Santa Ana winds in the Santa Monica Mountains foothills create extreme fire-weather conditions. A half-framed garage with temporary roofing and open vents is a liability. We don’t start rough framing until all Chapter 7A materials are on-site and the weather window is clear - or we accelerate the envelope to dried-in status before wind season peaks.

Pricing for Garage Conversion ADU in Calabasas, CA

We Also Serve Cities Near Calabasas

Our crews work throughout the west San Fernando Valley and adjacent foothill communities. We regularly price and build garage conversion ADUs in Calabasas, Tarzana, Encino, Chatsworth, and Northridge - each with its own permit path, utility district, and typical HOA landscape. The Las Virgenes sewer review and Chapter 7A requirements are specific to Calabasas and similar Santa Monica Mountains foothill cities; projects on the Valley floor in Tarzana or Encino typically move faster with fewer material constraints.

FAQs - Garage Conversion ADU in Calabasas