ADU in Sherman Oaks, CA
Junior ADU and interior conversion in Sherman Oaks typically runs $85,000-$165,000 all-in, while site prep and utility work for any ADU type adds $18,000-$55,000 depending on whether your 1950s ranch needs a panel upgrade or foundation work. We’re Ellery ADU Studio, and we’ve designed, permitted, and built more than 900 ADUs since 2015 under one contract at one written price. Call (424) 325-4322 to schedule your free estimate.
Sherman Oaks sits where the 405 and 101 freeways cross, putting every ADU we build here in range of commuters who work on both the Westside and in the Valley. That geographic position drives rental demand, but the housing stock drives the construction approach: post-WWII wood-frame ranches on 6,000-9,000 sq ft R1 lots with detached two-car garages, 60-100 amp electrical panels, and summer temperatures that regularly hit 100-108°F. The LADBS streamlined ADU ordinance applies here, not a separate municipal code, which means 4-foot rear and side setbacks and no discretionary review for most projects. We coordinate every project from our Los Angeles office, with crews serving Sherman Oaks locally.
Why Sherman Oaks Homes Are Different
The San Fernando Valley heat trap is real. Sherman Oaks regularly sees 10-15 degrees above coastal temperatures, so every ADU here gets a dedicated mini-split system sized for the load, not a window unit or extension of the main house HVAC. That is code-practical necessity, not upsell.
The housing stock is remarkably consistent: wood-frame ranches built 1948-1972, most on raised foundations or slabs, with detached garages set deep on the lot. Electrical panels from this era are almost always 60-100 amp service, which means a panel upgrade before energizing any new unit. We check this on the first site visit and flag it in the written scope.
Then there is the terrain divide within a single ZIP code. Flatland properties south of Ventura Boulevard use standard vinyl siding and conventional venting. Hillside streets above Mulholland sit in LA’s Very High Fire Hazard Severity Zone, triggering ignition-resistant exterior assemblies, Class A roofing, and ember-resistant venting. We verify the fire hazard zone at the address level before quoting, because the material difference alone can run $15,000-$25,000.
Our Main Sherman Oaks Services
Most Sherman Oaks homeowners start with one of these three services. Each has its own dedicated page with deeper detail on local conditions and pricing.
ADU Design & Permitting in Sherman Oaks
We produce the full permit set as the core product, not an afterthought. For Sherman Oaks, that means LADBS plan check submittal under the streamlined ADU ordinance, fire-hazard zone verification for hillside parcels, and coordination with any HOA architectural review. Every drawing set includes structural, MEP, and Title 24 energy compliance. ADU Design & Permitting in Sherman Oaks covers our full process.
Garage Conversion ADU in Sherman Oaks
The detached two-car garage on a deep R1 lot is the most common starting point in Sherman Oaks. We assess slab thickness, roof structure, and whether the existing electrical service can handle the additional load, most often requiring a panel upgrade. The LADBS streamlined ordinance means no discretionary review for qualifying projects. Garage Conversion ADU in Sherman Oaks has full details.
New Detached ADU in Sherman Oaks
When the garage is unsuitable or the lot has rear yard space, we design a new detached unit from footing to finish. Flatland sites south of Ventura Blvd follow standard assembly specs; hillside parcels above Mulholland require fire-hardened materials and ember-resistant venting that we specify from the foundation up. New Detached ADU in Sherman Oaks explains the full scope.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Junior ADU & Interior Conversion in Sherman Oaks
Junior ADU and interior conversion in Sherman Oaks solves a specific problem: homeowners who want rental income or family housing without building new square footage. The 1950s-1970s ranch stock here offers three natural candidates: a basement under the raised foundation, a room or wing that can be separately metered, or the space above a detached garage. Each has distinct code paths under LADBS, and each requires solving the same underlying conditions: 60-100 amp panels that won’t carry a second unit, and cooling loads that demand dedicated mini-split sizing for Valley summers. We handle Junior ADU & Interior Conversion as a single contract, from measured drawings through final inspection, at one written price established before work starts.
Room-to-ADU Conversion
Signs you need it
You have a bedroom wing or ground-floor room with separate exterior access, but it shares electrical and HVAC with the main house and lacks kitchen or laundry infrastructure.
What it costs in Sherman Oaks
Room-to-ADU conversion in Sherman Oaks typically runs $85,000-$140,000 all-in, including the panel upgrade, dedicated mini-split, kitchenette rough-in, and permit set.
How we do it
We measure existing conditions, produce the LADBS permit set with separate utility metering detail, upgrade the electrical panel, install the mini-split and kitchenette, and coordinate inspection.
Above-Garage ADU
Signs you need it
Your detached garage has headroom for a second floor, but the existing slab and framing were never designed for residential live load or separate utilities.
What it costs in Sherman Oaks
Above-garage ADU in Sherman Oaks typically runs $110,000-$165,000 all-in, including structural reinforcement, stair access, and full MEP from the main house.
How we do it
We assess the existing structure for live-load capacity, design the stair and egress per LADBS, reinforce or replace the roof structure, and run new electrical, plumbing, and HVAC as a standalone system.
What Junior ADU & Interior Conversion Costs in Sherman Oaks
| Item | Typical range in Sherman Oaks |
|---|---|
| Room-to-ADU conversion (all-in) | $85,000-$140,000 |
| Above-garage ADU (all-in) | $110,000-$165,000 |
| Interior JADU with shared systems | $65,000-$95,000 |
Does a Junior ADU need its own electrical meter in Sherman Oaks?
Yes, LADBS requires separate metering for any ADU, including Junior ADUs, which means a panel upgrade for most 1950s-1970s homes with 60-100 amp service. We verify existing capacity during the first site visit and include the upgrade in your written quote. Call (424) 325-4322 for an exact figure - estimates are free.
Can I convert my basement to an ADU in Sherman Oaks?
Yes, if the basement has legal egress windows, ceiling height of at least 7 feet 6 inches, and access to the required parking spaces without displacing them. Many raised-foundation ranches in Sherman Oaks qualify. We measure and document existing conditions before quoting. Call (424) 325-4322 to schedule a site visit.
ADU Site Prep & Utilities in Sherman Oaks
ADU site prep and utilities in Sherman Oaks addresses the conditions that stop most projects before they start: undersized electrical service, sloped or uncompactable soil, and utility runs that cross mature oak root zones protected by city ordinance. The 1948-1972 housing stock here was built for single-family load, not a second unit, so panel upgrades are the norm, not the exception. We handle ADU Site Prep & Utilities as a standalone scope or as the first phase of a full design-build contract, always with a written price before ground breaks.
Electrical Panel Upgrade
Signs you need it
Your existing panel is 60-100 amp with no open breaker slots, or the main service line is undersized for the additional ADU load.
What it costs in Sherman Oaks
Electrical panel upgrade in Sherman Oaks typically runs $4,500-$8,500 for a 200-amp service, including LADBS permit and inspection.
How we do it
We verify existing service size and load calculation, specify the new panel and service line, pull the LADBS permit, coordinate DWP disconnect and reconnect, and pass inspection before rough-in.
Foundation & Grading
Signs you need it
Your garage slab is cracked, less than 4 inches thick, or poured without reinforcement, or the lot slopes more than 2 percent toward the proposed ADU footprint.
What it costs in Sherman Oaks
Foundation and grading work in Sherman Oaks typically runs $12,000-$28,000 for a new detached ADU, including excavation, engineered fill, and reinforced slab or stem wall.
How we do it
We survey existing grades and soils, produce the geotechnical and structural detail for LADBS, excavate or grade as specified, and pour to the engineered plan with photo documentation at each stage.
What ADU Site Prep & Utilities Costs in Sherman Oaks
| Item | Typical range in Sherman Oaks |
|---|---|
| Electrical panel upgrade (200-amp) | $4,500-$8,500 |
| Foundation and grading (new ADU) | $12,000-$28,000 |
| Plumbing lateral extension | $8,000-$18,000 |
Does every Sherman Oaks ADU need a panel upgrade?
Nearly every pre-1970s home in Sherman Oaks does, because 60-100 amp service cannot carry a second dwelling unit with kitchen, laundry, and cooling loads. We verify during the first site visit and include the exact scope in your written quote. Call (424) 325-4322 to confirm your service size.
How long does utility work take before construction starts?
Utility work typically runs 3-6 weeks in Sherman Oaks, including LADBS permit issuance and DWP or LADWP coordination for electrical service changes. We schedule this phase to complete before framing begins so the construction timeline is not extended. Call (424) 325-4322 to review your specific schedule.
Brands We Service in Sherman Oaks
We specify and coordinate prefab and modular systems from Abodu, Cover, and Dvele within the same single contract, handling factory-to-site logistics, crane placement, and finish integration. Our crews are fluent in these systems’ connection details and warranty requirements. See our brands for the full list.
Pricing for ADU in Sherman Oaks, CA
| Service | Typical range in Sherman Oaks |
|---|---|
| Room-to-ADU conversion (all-in) | $85,000-$140,000 |
| Above-garage ADU (all-in) | $110,000-$165,000 |
| Interior JADU with shared systems | $65,000-$95,000 |
| Electrical panel upgrade (200-amp) | $4,500-$8,500 |
| Foundation and grading (new ADU) | $12,000-$28,000 |
| Plumbing lateral extension | $8,000-$18,000 |
| Gas line extension | $3,500-$7,500 |
| Landscaping and hardscape (post-build) | $5,000-$15,000 |
Prices push higher in Sherman Oaks for hillside parcels above Mulholland due to VHFHSZ fire-hardening requirements, and for any project requiring DWP service-line trenching across mature oak root zones. Under Haven Standard Clause 1, your written price is locked at signing; no change orders, no door-side upsells.
Neighborhoods We Serve in Sherman Oaks
We work across Sherman Oaks from the flatlands south of Ventura Boulevard to the hillside streets above Mulholland Drive. Dispatch and scheduling are coordinated from our Los Angeles office; crews are typically on-site within one business day of permit readiness.
- Sherman Oaks Estates (hillside, VHFHSZ)
- Longridge Estates
- Van Nuys Sherman Oaks Park vicinity
- Ventura Boulevard corridor (flatland, standard assemblies)
- Mulholland Drive hillside parcels
Service Area - Cities Near Sherman Oaks
Our crews serve the full central San Fernando Valley and adjacent Westside-adjacent communities. We regularly coordinate permits and inspections for projects in Van Nuys, CA, Studio City, CA, North Hollywood, CA, and West Hollywood, CA, all under the same LADBS jurisdiction and streamlined ADU ordinance.
Serving Sherman Oaks, CA - Our Local Coverage Area
We’re based in the Sherman Oaks area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About ADU in Sherman Oaks
LADBS streamlined ADU review typically takes 4-8 weeks for qualifying projects in Sherman Oaks, compared to 3-6 months under standard plan check. Projects that trigger VHFHSZ review or require oak tree protection plans add 2-4 weeks. We track every submittal and respond to corrections within 48 hours.
California law prohibits HOAs from outright banning ADUs, but they may impose reasonable design standards on architectural review. We review your CC&Rs during the feasibility phase and produce drawings that satisfy both LADBS and HOA requirements where applicable. The written scope includes any HOA coordination time.
We pull all permits as part of our single-contract model. The permit set is our core product, not an add-on, and we manage LADBS plan check, corrections, and inspection scheduling. You receive copies of every approved document and inspection sign-off for your records, per Haven Standard documentation requirements.
What happens when you call
- 1A real person answersNo phone trees - talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Sherman Oaks Customers Say
"Every allowance was itemised at the start, so the finish selections did not turn into a surprise at the end."
- Benedict H."The rental income has covered the payment since the second month. They were realistic about the numbers rather than optimistic."
- Odette N."They walked us through setbacks and utility capacity before we paid anything, and told us one of our two options was not going to get approved."
- Mireille T.