Tarzana is one of the best neighborhoods in the San Fernando Valley for ADU construction. Large lots (often 8,000–15,000+ sq ft), strong home values ($1.4M–$3.2M), and plenty of detached garages that can be converted — Tarzana checks every box for a high-return ADU project. APLA Construction (CA Lic #1136359) builds ADUs throughout Tarzana, managing the full LADBS permit process and coordinating all construction trades under one contract.
The most common Tarzana ADU is a detached garage conversion. Most Tarzana homes have a two-car detached garage on a large flat lot — ideal for conversion. A 480 sq ft two-car garage becomes a comfortable 1-bedroom ADU that rents for $2,200–$2,900/month.
Tarzana lot sizes support new detached ADUs in addition to the main home and garage. A new 750–1,000 sq ft detached ADU on a large Tarzana lot can accommodate a 2-bedroom layout that rents for $2,800–$3,600/month.
Converting an existing attached space in the Tarzana home to a JADU is the most affordable option for homeowners who want rental income without a full garage conversion or new construction project.
Tarzana is in the City of Los Angeles. All permits go through LADBS. Garage conversion ADUs with fewer than 500 sq ft are typically eligible for OTC (over-the-counter) plan check approval — 1–3 business days. Larger ADUs and new construction go through standard plan check (4–8 weeks). APLA manages all LADBS submissions and schedules inspections.
A Tarzana garage conversion ADU costing $115,000 renting for $2,600/month generates $31,200/year in gross rental income. After vacancy (5%), insurance ($100/mo), and maintenance (2% per year), net annual return is approximately $27,000 — a 23% annual cash-on-cash return. At current Tarzana home values, an ADU also adds $200,000–$350,000 in property value on appraisal.
A garage conversion ADU costs $85,000–$150,000. A new detached ADU costs $155,000–$285,000. A JADU costs $48,000–$85,000. Tarzana ADU costs are comparable to Woodland Hills and Encino — mid-range Valley pricing with strong rental income returns.
A garage conversion takes 8–15 weeks total. A new detached ADU takes 12–20 weeks. LADBS OTC plan check (1–3 days for eligible conversions) or standard plan check (4–8 weeks) is the primary variable. APLA advises on the fastest permit path for each project.
Garage conversion 1-bed: $2,200–$2,900/month. New detached 2-bed: $2,800–$3,600/month. JADU studio/1-bed: $1,600–$2,200/month. Tarzana rents are strong for the Valley market — Ventura Blvd access, Woodland Hills proximity, and large lots with private ADU settings are rent drivers.
Nearly all residential properties in Tarzana are eligible for at least one ADU type under California state law. APLA provides a free ADU feasibility assessment — we review your parcel, identify the applicable permit path, and give you a cost and timeline estimate at no charge.
Call: (818) 818-4419
Email: info@aplaconstruction.com
CA General Contractor License #1136359
General Contractor Tarzana | ADU Construction Los Angeles | ADU Cost Guide Los Angeles 2026