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

Fast, Reliable Garage Conversion ADU Across Tarzana

A garage conversion ADU in Tarzana typically runs $95,000-$165,000 all-in, from measured drawings through final LADBS inspection, with detached two-car garages on the larger ranch lots south of Ventura Boulevard landing at the higher end and attached single-car conversions toward the lower. We’re Nadia Ellery’s Garage Conversion ADU team at Ellery ADU Studio, and we’ve designed, permitted, and built ADUs across Tarzana’s RE-9, RE-11, and RE-15 zones since 2015. Scheduling and permit coordination run from our Los Angeles office, but our crews work Tarzana weekly. Call (424) 551-7706 to schedule your free estimate.

Call (424) 551-7706

Why Ellery ADU Studio Los Angeles Is Tarzana’s Preferred Garage Conversion ADU Company

We’ve completed garage conversion ADUs on streets from Avenida Hacienda to Corbin Avenue and up into the hillside parcels above Ventura Boulevard. Tarzana ADU Design & Permitting means homeowners get documented photo records and written warranties, not handshakes. Our 900+ ADUs since 2015 include dozens in the 91356 zip, and we know the difference between a flat-lot ranch plan check and a hillside file that LADBS routes through additional geological review.

Response time to Tarzana is same-week for initial site visits. We don’t subcontract design to one firm and construction to another; our Garage Conversion ADU in Tarzana work is a single contract at a single written price per Haven Standard Clause 1. That matters here because Tarzana’s mid-century housing stock throws the same curveballs repeatedly: 100-amp panels that LADBS conditions for upgrade, hillside fire-resistive detailing, and Title 24 energy calcs that fail without proper HVAC sizing for 100°F-plus summer days. We’ve seen them. We quote them upfront.

Our Garage Conversion ADU Services in Tarzana

Detached Garage Conversion

Tarzana’s deep lots-many 12,000 sq ft and up-often hold detached two-car garages built in the 1960s with good bones but outdated everything else. A detached garage conversion here becomes a standalone dwelling unit with its own kitchen, bath, and separate entrance. On hillside parcels north of Ventura Boulevard, we clear LA’s Hillside Area Construction Regulations and Very High Fire Hazard Severity Zone requirements, which means fire-resistive exterior materials and often a soils report. We quote both in writing before work starts. The fixed price includes the 200-amp panel upgrade that LADBS plan checkers near-universally require in Tarzana’s 100-amp housing stock.

Attached Garage Conversion

Attached garages on Tarzana’s single-story ranches connect directly to the main house structure, so the conversion must maintain fire separation between units while creating independent living space. We specify James Hardie fire-resistive siding assemblies where code demands, and we coordinate the structural connection details in our permit set-not as a field decision. On a 1959 single-story ranch off Avenida Hacienda just south of Ventura Boulevard, our crew converted a detached two-car garage into a 480 sq ft attached-garage-style studio with custom rift-sawn white oak millwork and a 12-foot architectural glass slider facing the rear yard. The mid-century 100-amp panel had to be upgraded to 200 amps per LADBS plan check, and because the client selected a specialty European door with a 16-week lead time, we locked the fixed price in writing and ordered the door before demo so the schedule tracked material arrival, not labor. The finished unit passed Title 24 with a ducted mini-split sized for Tarzana’s extreme summer heat load, and the crew detailed the attic with high-R insulation and continuous ridge ventilation to satisfy the energy calc.

Garage Partition & Bathroom Add

Not every Tarzana garage converts to a full ADU. Some homeowners partition the space-office plus gym, studio plus storage-while adding a bathroom to support the new use. We draw the partition as a permanent structural element in the permit set, not a “we’ll figure it out in the field” afterthought. Plumbing rough-in for the bathroom ties to existing sewer lines; we verify capacity in our initial site visit and note any line-size upgrade in the written quote. On hillside lots, the bathroom venting and drainage get the same fire-resistive detailing as the exterior shell.

Carport Conversion

Tarzana has fewer carports than enclosed garages, but the mid-century ranches on streets like Burbank Boulevard sometimes include them. Converting a carport means adding walls, insulation, and a proper thermal envelope from scratch-more build than remodel. We specify Abodu or Cover modular systems where the site geometry fits, or stick-frame with James Hardie exterior assemblies where custom dimensions demand it. Either way, the permit set addresses the full energy compliance path, not just the structural shell.

Trusted Brands We Service in Tarzana

We specify and coordinate prefab and modular systems from Abodu, Cover, and Dvele within the same single-contract structure as our stick-frame builds. For Tarzana’s fire-resistive hillside requirements, we regularly detail James Hardie fiber-cement assemblies that satisfy LA’s Very High Fire Hazard Severity Zone standards without the maintenance cycle of wood siding. Our relationships with these manufacturers mean we can confirm lead times before quoting, not after-critical when a European specialty door runs 16 weeks and the project calendar hinges on its arrival.

Common Garage Conversion ADU Problems We See in Tarzana Homes

• The 100-amp panel surprise. Tarzana’s mid-century ranch homes almost universally carry 100-amp electrical service, and LADBS plan checkers routinely condition ADU permit issuance on upgrading to 200-amp service. Contractors who don’t check the panel during the first site visit surface this as a mid-project change order. We measure, photograph, and quote it in writing under Haven Standard Clause 1.
• Title 24 failure on attic assumptions. Tarzana’s 100°F-plus summer highs demand mini-split HVAC, high-R attic insulation, and continuous ventilation detailing that coastal-LA energy defaults don’t satisfy. We run the energy calc during design, not after framing is up.
• Hillside soils reports triggered late. North of Ventura Boulevard, LA’s Hillside Area Construction Regulations and Very High Fire Hazard Severity Zone add geological review and fire-resistive material standards. A contractor unfamiliar with Tarzana’s dual-jurisdiction hillside parcels may miss the soils report requirement entirely until plan check kicks the file back.
• Long-lead items ordered after demo. Custom millwork, architectural glass, and imported doors drive the schedule on high-end Tarzana conversions. Ordering them post-demo means weeks of idle labor. We lock the fixed price, order materials, and schedule demo to arrive when the materials do.

Pricing for Garage Conversion ADU in Tarzana, CA

We Also Serve Cities Near Tarzana

Our crews work throughout the south San Fernando Valley, including Tarzana neighbors in Encino, Sherman Oaks, Van Nuys, and Studio City. Each city’s LADBS routing, hillside regulations, and housing stock differ; we adjust the permit set and quote accordingly rather than paste the same plan across zip codes.

FAQs - Garage Conversion ADU in Tarzana