Fast, Reliable New Detached ADU Across Studio City
A new detached ADU in Studio City typically runs $280,000 to $450,000 all-in, drawings through final inspection, with hillside parcels north of Ventura Boulevard landing at the higher end of that range because of Los Angeles fire code upgrades. Permitting through the LA Department of Building and Safety takes four to seven months for a standard flat-lot ADU and seven to twelve months when the Very High Fire Hazard Severity Zone overlay applies. We work across Studio City from the valley floor up into the Fryman Canyon and Coldwater Canyon hillsides, and our team has pulled permits for detached ADUs on both sides of that fire zone boundary. Call (971) 497-2402 to get a written price before any work starts.
Why Ellery ADU Studio Is Studio City’s Preferred New Detached ADU Company
Ellery ADU Studio has designed, permitted, and built 900+ ADUs since 2015 under a single design-build contract. That matters in Studio City because the biggest source of ADU project failure is the handoff between a designer who draws one thing and a builder who builds another. We eliminate that gap. Nadia Ellery leads the studio, and every Studio City project carries the same documentation: a permit set that the city actually accepts, a written price before work starts, and a documented photo record of every site visit.
What separates us in Studio City specifically is that we know the LA Department of Building and Safety’s hillside requirements before we quote your project, not after demolition starts. We have run dozens of Studio City addresses through the city’s online hazard severity map, and we know which parcels trigger ignition-resistant construction and ember-resistant venting requirements. That knowledge gets written into your line-item scope at signing, so the price you approve is the price you pay. Under Haven Standard Clause 1, every project gets a written price before any work begins. Under Clause 5, the scope is locked at signing. No door-side upsells, no scope creep discovered at the worst possible moment.
Our crews are background-checked and uniformed. A live person answers calls 24/7. If you already have a written estimate from another firm, we will give you a Free Second Opinion and show you where the Studio City-specific items are missing or mispriced.
Our New Detached ADU Services in Studio City
Custom Built ADU
A custom built ADU on a flat Studio City lot is a more straightforward proposition than most people assume. The valley floor between Ventura Boulevard and Moorpark Street is dominated by 1940s and 1950s California ranch homes on lots from 6,000 to 10,000 square feet, and many of those parcels have enough rear-yard depth for a 600 to 1,000 square foot detached ADU without a variance. We handle the full design-build scope: site survey, architectural drawings, structural engineering, permit submission, foundation, framing, and finish. If your existing garage is detached and structurally sound, a garage conversion may be more cost-effective, but if you want a separate rental unit with its own address, a custom detached ADU is the right call.
Prefab ADU Installation
Prefab and modular systems have become a serious option for Studio City homeowners who want to compress the construction timeline. We specify and coordinate systems from Cover, Dvele, and Mighty Buildings, among others. The advantage is precision manufacturing off-site, which reduces weather delays and framing errors. The Studio City-specific caveat is that prefab does not exempt you from fire zone requirements. A hillside parcel north of Ventura in the VHFHSZ still needs ignition-resistant exterior assemblies and Class A roofing, regardless of whether the walls were built in a factory. We write those upgrades into the prefab contract up front.
Modular ADU
Modular construction works well for the tighter lots common in the hillside neighborhoods off Laurel Canyon Boulevard and along Coldwater Canyon Avenue, where access for a traditional build can be compromised by steep driveways and limited staging space. Modular units arrive in sections and are set with a crane, which means less on-site cutting, less debris, and fewer trade days on your property. We handle the site work, the foundation, the utility connections, and the permit set as one contract. The structure itself is manufactured to spec, and we coordinate with the modular brand so the delivered unit matches the permitted drawings exactly. That match is covered in writing by our 365-Day Done Right Promise.
Studio ADU
A studio ADU in the 400 to 600 square foot range remains the most popular choice for Studio City owners who want a rental unit with strong monthly income potential or a private space for an aging parent. At 2026 Studio City rents, a well-built studio ADU can command $2,200 to $2,800 a month depending on finishes and access. The design constraints on a flat 6,000 square foot lot are manageable: a 500 square foot studio with a kitchenette, three-quarter bath, and separate entrance fits within the city’s setback requirements on most parcels south of Ventura. On a hillside parcel, the same unit may require retaining walls or a pier-and-beam foundation, which we quantify before you sign anything.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Studio City
Ellery ADU Studio specifies and coordinates prefab and modular systems from Cover, Dvele, Mighty Buildings, and Boxabl within the same single contract that covers design, permitting, and site work. We don’t simply hand you a brand brochure and walk away. Our team handles the engineering review to confirm the system works with your Studio City parcel, orders the unit, manages the delivery, and sees it through final inspection. For Studio City homeowners, the practical benefit is speed: a prefab ADU installation can knock four to six months off the total timeline compared to stick-built construction, assuming your site prep and foundation are already permitted. We stock nothing in a warehouse; every system is ordered for your specific project and your specific address.
Common New Detached ADU Problems We See in Studio City Homes
- VHFHSZ surprises after demolition opens. A flat-lot quote gets blown apart when the LA Department of Building and Safety confirms the parcel sits inside the Very High Fire Hazard Severity Zone, triggering $20,000 to $40,000 in fire-hardening upgrades the homeowner was never told about. We run the address through LA’s hazard map before we quote, not after the walls come down.
- Undersized electrical panels and failed sewer laterals. Studio City’s 1940s and 1950s housing stock commonly carries original 100-amp panels and cast-iron sewer lines. Neither is sufficient for a new ADU with a kitchen and laundry, and both get discovered when the permit review starts. We write allowances for these items into the contract so the price is real, not hopeful.
- HVAC spec’d for coastal temperatures. Studio City regularly sees summer highs above 100°F, and a mini-split sized for Santa Monica will not hold temperature in an ADU here. We size heat load for the San Fernando Valley’s inland climate, which means a larger condenser and more BTU per square foot than coastal contractors would specify.
- Hillside foundations that were never priced. Parcels north of Ventura Boulevard climbing toward Fryman Canyon often require caissons or pier-and-beam engineering that adds $30,000 to $80,000 to the foundation line item. A contractor who quotes a flat slab on a hillside lot is guessing. We send a soils engineer when the parcel slope indicates anything beyond a standard foundation.
Pricing for New Detached ADU in Studio City, CA
Here are the numbers Studio City homeowners ask for. A 1-bed, 1-bath detached ADU of roughly 600 square feet on a flat lot south of Ventura Boulevard runs $280,000 to $350,000 all-in. A 2-bed, 2-bath unit of 800 to 1,000 square feet runs $350,000 to $450,000. Hillside parcels north of Ventura add $20,000 to $40,000 for fire-hardening requirements and another $30,000 to $80,000 when caissons or pier-and-beam foundations are necessary. A prefab or modular ADU from Cover or Dvele typically lands 10 to 15 percent below stick-built on the structure itself, though site work and fire zone upgrades remain the same. Every Ellery ADU Studio project includes a written price before work starts, per Haven Standard Clause 1, and a documented photo record on every visit. Call (971) 497-2402 for an exact written price for your address.
We Also Serve Cities Near Studio City
Our New Detached ADU team serves Studio City and the surrounding neighborhoods, including North Hollywood, Universal City, Van Nuys, and West Hollywood. If you’re just outside the Studio City line, we still cover your project with the same design-build contract and written pricing. For full details on local permitting and fire zone requirements, see our Studio City page.
Serving Studio City, CA - Our Local Coverage Area
We’re based in the Studio City 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 - New Detached ADU in Studio City
You check the address against LA’s online hazard severity map, which is maintained by the LA Department of Building and Safety and updated periodically. Studio City parcels north of Ventura Boulevard climbing toward Fryman Canyon and Coldwater Canyon frequently fall inside the VHFHSZ, while flat parcels two blocks south of Ventura often do not. We run every Studio City address through this map before we prepare a written price, and we show you the result in your estimate. Call (971) 497-2402 and we will run your address while you’re on the phone.
Inside the VHFHSZ, a new detached ADU in Studio City requires ignition-resistant exterior wall assemblies, ember-resistant venting, and Class A roofing. Depending on the parcel and the structure’s size, you may also need tempered or multi-pane glazing on windows facing wildland areas, and enclosed eaves. These upgrades typically add $20,000 to $40,000 to the project budget. We write them into the line-item scope at signing, so the inspector’s requirement is priced before you’re committed.
Because most Studio City homes from the 1940s and 1950s have hidden conditions: original 100-amp electrical panels that can’t support an ADU, cast-iron sewer laterals that have rusted through, and framing that was never engineered for habitable space. A contractor who quotes without inspecting these systems is guessing, and the guess shows up as a change order after demolition. Our approach is inspection first, then a written allowance for each condition we can identify, so any surprise is priced and approved in writing before we touch it. Call (971) 497-2402 to schedule the inspection.
Most likely yes. Hillside parcels north of Ventura Boulevard on slopes above roughly 10 to 15 percent require either caissons drilled to bedrock or pier-and-beam engineering, which costs $30,000 to $80,000 more than a standard slab. The exact requirement is determined by a soils engineer, not by a rule of thumb. We order the soils report during design, so the foundation line item in your written price reflects the actual geology of your parcel. For a free written price that includes the soils evaluation, call (971) 497-2402.
A properly sized mini-split for a 600-square-foot Studio City ADU needs roughly 18,000 to 24,000 BTU of cooling capacity, which is 20 to 30 percent more than a coastal contractor would specify for the same square footage. Studio City’s summer highs above 100°F and the inland Valley’s dry heat drive the calculation. We run a Manual J load calculation for every ADU, not a rule-of-thumb guess, because an undersized unit will run constantly, fail to hold temperature, and shorten its own compressor life. Call (971) 497-2402 and we will size your system correctly, first time, in writing.
Written by Nadia Ellery, Owner at Ellery ADU Studio, serving Studio City since 2015.