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 upgrades add $15,000-$45,000 depending on what the existing ranch-era home needs. We’re Ellery ADU Studio, and we’ve found that Sherman Oaks homeowners call us after they’ve learned two things: the Valley floor’s 1950s-1970s housing stock is almost purpose-built for ADUs, and those same homes hide expensive surprises behind their walls. Our Junior ADU & Interior Conversion service starts with a documented inspection that finds galvanized supply lines and undersized electrical panels before we quote, not after. Call (424) 407-8266 for a free estimate with a written price before any work begins.
Why Sherman Oaks Homes Are Different
Sherman Oaks sits entirely within the City of Los Angeles, not an independent municipality. That matters because LA’s ADU ordinance allows homeowners to stack a garage-conversion ADU plus a junior ADU on a single R1 lot, something independent cities often block. The neighborhood’s 1950s-1970s suburban build-out left the Valley floor with large lots, typically 7,000-10,000 square feet, and detached two-car garages that are among the most conversion-ready parcels in all of LA.
The climate is equally specific. Sherman Oaks sits deep in the San Fernando Valley heat pocket, where summer highs regularly reach 105-110°F, often 15-20°F hotter than Westside neighborhoods just over the hills. A properly sized mini-split system isn’t an upgrade here; it’s what makes an ADU habitable and rentable. South of Ventura Boulevard, properties climb into the Santa Monica Mountain foothills and fall within Very High Fire Hazard Severity Zones, triggering fire-hardening requirements that can add tens of thousands to identical-looking jobs.
There’s also the Ventura Boulevard dividing line. Parcels north sit on flat Valley floor under standard R1 rules. Properties just blocks south trigger the City of LA’s Hillside Ordinance, adding grading restrictions, stricter setbacks, and fire-resistant construction mandates. Contractors who don’t verify a parcel’s zone before quoting end up with change orders we refuse to write.
Our Main Sherman Oaks Services
These are the three services Sherman Oaks homeowners ask about most, each with its own dedicated page and written pricing.
ADU Design & Permitting in Sherman Oaks
Our permit set is the core product, not an afterthought. In Sherman Oaks, we regularly see projects delayed when designers deliver incomplete sets that miss Hillside Ordinance triggers or fire-hazard zone requirements. We handle the full permit package, including LADBS structural, mechanical, electrical, and plumbing plan checks, with revisions included until approval. ADU Design & Permitting in Sherman Oaks covers every drawing needed for a buildable, inspectable project.
Garage Conversion ADU in Sherman Oaks
Garage-to-ADU conversions dominate Sherman Oaks by a wide margin, and for clear reason: the neighborhood’s detached two-car garages on flat Valley floor lots need minimal structural modification. We inspect the slab, roof structure, and utility capacity before quoting, then deliver drawings through final inspection under one contract at one written price. Garage Conversion ADU in Sherman Oaks includes the full conversion scope.
New Detached ADU in Sherman Oaks
New detached ADUs work best on the deeper lots north of Ventura, where standard R1 setbacks leave room for a 500-1,200 square foot structure without variance. We coordinate prefab systems from Abodu, Cover, and Dvele within the same single contract, handling site prep, foundation, utility tie-ins, and finish. New Detached ADU in Sherman Oaks covers the full build.
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 multigenerational housing without building new square footage. The Valley floor’s single-story California ranch homes, built 1948-1975, offer ideal conditions, with wide side yards, flat backyards, and existing floor plans that convert cleanly. But those same homes commonly have 100-amp electrical panels and original galvanized supply lines that must be upgraded during permitting, adding cost that we price in from the start under Haven Standard Clause 1. Our Junior ADU & Interior Conversion service documents every existing condition with photos before you sign.
Room-to-ADU Conversion
Signs you need it
You have a 250-400 square foot bedroom wing, den, or bonus room with separate exterior access and want to add a kitchenette and full bath without expanding the building footprint.
What it costs in Sherman Oaks
Room-to-ADU conversions in Sherman Oaks typically run $85,000-$140,000 all-in, including drawings, permits, the kitchenette, bath, and required electrical and plumbing upgrades.
How we do it
We measure existing conditions, produce the permit set with mechanical and electrical load calculations, pull the LADBS permit, and build to the drawings through final inspection with a documented photo record at every visit.
Interior JADU
Signs you need it
You want the simplest legal rental unit possible, created within your existing home’s walls with a separate entrance, efficiency kitchen, and shared or separate bath.
What it costs in Sherman Oaks
Interior JADUs in Sherman Oaks typically run $65,000-$110,000 all-in, including the separate entrance, efficiency kitchen, required utility upgrades, and full permit set.
How we do it
We verify the unit meets JADU size limits and owner-occupancy requirements, design the layout to code, pull permits, and build with the same documented photo record and written price guarantee as our full ADUs.
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 |
| Interior JADU (all-in) | $65,000 - $110,000 |
| Electrical panel upgrade (if needed) | $4,500 - $8,500 |
Can I add a JADU if I already have a garage conversion ADU?
Yes, under LA’s permissive ADU ordinance, a single R1 lot in Sherman Oaks can hold both a garage-conversion ADU and an interior JADU, provided the owner occupies one unit. Call (424) 407-8266 to verify your lot qualifies during your free estimate.
Will the price change once work starts?
No. Under Haven Standard Clause 5, the scope is locked at signing with a written price before any work begins. We document existing conditions with photos during estimate so there are no surprises behind the walls. Call (424) 407-8266 for your written quote.
ADU Site Prep & Utilities in Sherman Oaks
ADU site prep and utilities in Sherman Oaks addresses the hidden infrastructure that determines whether an ADU project succeeds or stalls. The Valley floor’s ranch-era homes, built 1948-1975, commonly run on 100-amp electrical service and original galvanized water supply lines that cannot handle an additional dwelling unit. Summer temperatures hitting 105-110°F make proper electrical load calculations and mini-split sizing non-negotiable for habitability. Our ADU Site Prep & Utilities service prices these upgrades upfront, not as change orders, with every line item in writing before work starts.
Electrical Panel Upgrade
Signs you need it
Your home has a 100-amp panel, fused service, or the panel is original to a pre-1975 build and cannot handle the additional load of a kitchen, laundry, and HVAC for an ADU.
What it costs in Sherman Oaks
Electrical panel upgrades in Sherman Oaks typically run $4,500-$8,500, including the new 200-amp panel, permit, LADBS inspection, and utility coordination.
How we do it
We perform a load calculation for the main house plus ADU, specify the panel and service size, pull the LADBS electrical permit, and coordinate with LADWP for the service disconnect and reconnection.
Plumbing Lateral
Signs you need it
Your home has original galvanized supply lines, visible corrosion at fixtures, or water pressure below 40 PSI that cannot support an additional kitchen and bath.
What it costs in Sherman Oaks
Plumbing lateral replacement in Sherman Oaks typically runs $8,000-$18,000, including trenching, new copper or PEX supply from the meter, permit, and inspection.
How we do it
We locate the existing lateral with camera inspection if needed, specify the replacement route, pull permits, excavate with minimal landscape disruption, and pressure-test before backfill.
What ADU Site Prep & Utilities Costs in Sherman Oaks
| Item | Typical range in Sherman Oaks |
|---|---|
| Electrical panel upgrade | $4,500 - $8,500 |
| Plumbing lateral replacement | $8,000 - $18,000 |
| Foundation and grading (if needed) | $12,000 - $35,000 |
Do I need a panel upgrade for a JADU?
Usually yes. A JADU adds kitchen, bath, and HVAC load to a home that often already maxes out a 100-amp panel. We perform a load calculation during estimate and include the upgrade in your written price if needed. Call (424) 407-8266 to schedule.
Can site prep be done under the same contract as the ADU build?
Yes. Our design-build model covers site prep, utilities, and construction under one contract at one written price, eliminating the designer-versus-builder blame gap that derails most projects. Call (424) 407-8266 for a unified quote.
Brands We Service in Sherman Oaks
We specify and coordinate prefab and modular systems from Abodu, Cover, Dvele, and Mighty Buildings within the same single contract, handling site prep, foundation, utility tie-ins, and finish. Parts and technical documentation are stocked locally for fast turnaround. See our brands for full specifications.
Pricing for ADU in Sherman Oaks, CA
| Service | Typical range in Sherman Oaks |
|---|---|
| Room-to-ADU conversion | $85,000 - $140,000 |
| Interior JADU | $65,000 - $110,000 |
| Electrical panel upgrade | $4,500 - $8,500 |
| Plumbing lateral replacement | $8,000 - $18,000 |
| Foundation and grading | $12,000 - $35,000 |
| Gas line extension | $3,500 - $8,000 |
| Mini-split HVAC system | $5,500 - $12,000 |
| Landscaping and hardscape restoration | $4,000 - $15,000 |
Prices in Sherman Oaks push higher for properties south of Ventura Boulevard in Hillside Ordinance zones, where grading restrictions and fire-hardening requirements add scope. Every project is quoted with a written price before any work begins, per Haven Standard Clause 1. No call-for-pricing, no change orders, no surprises.
Neighborhoods We Serve in Sherman Oaks
We work across Sherman Oaks from the flat Valley floor to the foothill edges, with crews dispatched from our Los Angeles office and scheduling coordinated locally. Response time is typically same-week for estimates throughout the area.
- Sherman Oaks Estates
- Longridge Estates
- Van Nuys Sherman Oaks
- South of the Boulevard (foothill zone)
- Strathmore-Van Nuys border
Service Area - Cities Near Sherman Oaks
Our crews serve the full San Fernando Valley corridor, including Van Nuys, CA to the north, Studio City, CA to the east, Tarzana, CA to the west, and North Hollywood, CA to the northeast. Each city has its own permit environment and housing stock, and we adjust our permit sets and pricing accordingly.
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
Because Sherman Oaks is within the City of Los Angeles, ADU permits route through LADBS with the city’s standardized ADU checklist. Most complete permit sets clear in 8-14 weeks if the application includes structural calculations and fire-department clearance where required. Incomplete applications or missing Hillside Ordinance documentation add months.
California law prohibits HOAs from outright banning ADUs, but some Sherman Oaks condominium and planned-unit developments have covenants that restrict exterior modifications or parking configurations. We review your CC&Rs during estimate and flag any enforceable restrictions before you sign.
Yes, but not by reassessing your entire property. Under California’s Prop 13 rules, the ADU is assessed at current market value as new construction, while your main house retains its existing assessed value. Most Sherman Oaks homeowners see a manageable annual increase tied to the ADU’s construction cost, not a full reset.
Call (424) 407-8266 to schedule your free estimate. Every project receives a written price before any work begins, a documented photo record on every visit, and the 365-Day Done Right Promise backed in writing under The Haven Standard.
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
"The permit set and the build were one contract with one number. Our neighbours used two firms and spent a year watching them blame each other."
- Helena V."Every allowance was itemised at the start, so the finish selections did not turn into a surprise at the end."
- Benedict H."Garage conversion finished on the drawings and close to the schedule. They were honest that the sewer connection was the unknown, and it was."
- Arjun D.