Brentwood is one of the best neighborhoods in Los Angeles to build an ADU — high property values, strong rental demand from professionals and families, and residential lots that typically have the detached garage and backyard space to support ADU construction. APLA Construction (CA Lic #1136359) builds ADUs throughout Brentwood — from initial feasibility through Certificate of Occupancy — under one contract.
Converting an existing detached garage into a finished ADU is the most cost-effective path for most Brentwood homeowners. Most Brentwood homes have alley-accessed detached garages that are ideal for conversion.
Building a new freestanding ADU in the backyard — larger, more customizable, and more rentable than a garage conversion.
An addition to the primary home that creates a separate, self-contained unit with its own entrance. Common on lots where the backyard is not suitable for a detached structure.
Brentwood is within the City of Los Angeles. ADU permits go through LADBS. Under California’s 60-day ADU permit mandate, LADBS targets 45–70 days for plan check approval. APLA submits complete, accurate ADU applications to LADBS on behalf of every Brentwood client, minimizing corrections and delays. We handle plan check response, inspection scheduling, and Certificate of Occupancy coordination from start to finish.
Most Brentwood single-family lots qualify for at least one type of ADU. Key factors APLA evaluates:
APLA provides a free feasibility assessment for every Brentwood ADU inquiry — including a review of your lot, your zoning, and a preliminary cost range — before any commitment is made.
Brentwood’s proximity to Santa Monica, UCLA, and the 405 corridor makes it one of the top ADU rental markets in LA. Current rental ranges (2026):
Garage conversion ADU: $85,000–$145,000. Detached new construction ADU: $145,000–$280,000. Attached ADU: $135,000–$250,000. All costs include design, engineering, LADBS permits, construction, and Certificate of Occupancy.
Garage conversion: 10–14 months total. Detached new construction ADU: 14–20 months. LADBS permit processing takes 45–70 days. Construction takes 4–7 months depending on ADU type and scope.
Studio: $2,000–$2,800/month. 1-bedroom: $2,400–$3,400/month. 2-bedroom: $3,200–$4,400/month. Brentwood is a premium rental market with strong demand year-round.
Yes. APLA Construction handles ADU projects throughout Brentwood — from feasibility through Certificate of Occupancy. Call (818) 818-4419 for a free consultation.
Call: (818) 818-4419
Email: info@aplaconstruction.com
CA General Contractor License #1136359
Serving Brentwood, Santa Monica, Pacific Palisades, Westwood, West LA, and all of the Westside. Learn more about ADU construction with APLA. | See the full ADU cost guide.