ADU Builder · Sherman Oaks
Garage conversions and detached ADUs across Sherman Oaks. Permitted through LADBS, built by our own crews, priced in writing before we start.
ADU Builder in Sherman Oaks
South of Ventura Boulevard, the streets climb into the hills. North of it, the lots run flat and deep. Both work for an ADU. Some Sherman Oaks owners build for rental income, and rents here support it. Others build for parents, or for a grown kid who wants to stay close to home.
Athenian Builders Group is a licensed California general contractor (CSLB #1045030) that designs and builds ADUs across Sherman Oaks: one accountable team, a fixed price in writing, a firm timeline, and a 2-year workmanship warranty. See our full ADU construction services, or take a look at a detached backyard ADU we built in Sherman Oaks.
Permits
Sherman Oaks is part of the City of Los Angeles, so ADU permits go through LADBS. We handle the drawings, the submittal, and inspections through final sign-off.
Transparent Pricing
Real 2026 Los Angeles-area ranges by type. Where you land depends on size, site conditions, and finishes. After a free on-site visit, you get a fixed, itemized price, not a number that grows later.
| ADU Type | Typical Size | Typical Cost (2026) |
|---|---|---|
| Garage Conversion | 300–500 sq ft | $100k – $180k |
| Junior ADU (JADU) | up to 500 sq ft | $90k – $160k |
| Attached ADU | 400–800 sq ft | $180k – $320k |
| Detached New-Build | 500–1,200 sq ft | $250k – $450k |
Typical ranges for 2026, not quotes. Financing is available for qualified homeowners. See remodel financing options. Considering a smaller in-home unit? See our Junior ADU page.
Estimated project cost
Why Athenian
Most “ADU builders” are design shops or brokers who sub the construction out. We are a single self-performing team: we design it, pull the permits, and build it with our own crews. That means one point of contact, a fixed itemized price before we start, a firm timeline in writing, and a written 2-year workmanship warranty on everything we build in Sherman Oaks.
Questions
Yes. From the flats off Ventura Boulevard to the hillside streets, we design and build ADUs and garage conversions across Sherman Oaks with our own crews.
Sherman Oaks is within the City of Los Angeles, so LADBS issues the permits. We prepare the drawings, file the submittal, and walk it through every inspection.
Type and size drive it. A garage conversion typically runs $100k–$180k, and a detached new-build lands between $250k–$450k. You get a fixed, itemized price after a free on-site walkthrough.
Most of our ADUs finish in 3 to 5 months from permit to final inspection, depending on type, size, and city review times. You get a firm timeline in writing before construction starts.
Get a free on-site feasibility visit and a fixed, itemized price for your Sherman Oaks ADU. You’ll know exactly what it costs before we ever break ground. Call (310) 857-2520.
Takes about a minute. We reply the same business day and set up a free on-site visit.
