Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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AfterFast, Reliable Home Additions & ADU Across Studio City
A full home addition or ADU in Studio City runs $45,000 to $130,000 depending on scope, and the hillside lots north of Ventura Boulevard add grading, retaining-wall, and fire-hardening requirements that flat-lot bids never account for. We’re Barrett & Sons Construction, and we’ve been pulling permits and running crews through Studio City’s roofing and building environments for decades. If you’re planning a garage conversion, a detached ADU, or a second-story addition, call (877) 610-1318 and talk to Tom Barrett directly about what your specific lot will actually require.
Why Barrett & Sons Construction Is Studio City’s Preferred Home Additions & ADU Company
Studio City homeowners don’t hand five-figure construction contracts to strangers. They check the license, they ask neighbors, and they want the same face on the job from first walkthrough to final inspection. Tom Barrett has published his name, his address, and his license number for 29 years. That’s not a marketing line. It’s a dare. Look us up before you sign anything.
Crews serving Studio City are background-checked and uniformed, and a live person answers our phone 24 hours a day. When a Studio City homeowner calls about an ADU on a hillside lot off Dilling Street, whoever answers knows the difference between a 91604 hillside permit and a 91614 valley-floor permit. That local knowledge keeps your project from stalling in plan check.
We also carry premium brands across every trade that touches a home addition: Simonton and Ply Gem windows, PGT impact-rated glass where fire and wind exposure demand it. Materials you can look up, not whatever was left on a van.
Our Home Additions & ADU Services in Studio City
ADU Design & Permitting
Detached ADUs in Studio City’s hillside zones north of Ventura Boulevard nearly always require geotechnical review and retaining-wall permits before the first footer is poured. We handle the full permit package, including the Very High Fire Hazard Severity Zone compliance review that tripwires so many Studio City projects. The permit inspector works for you, not for me, and I like it that way.
Garage Conversion ADU
A garage conversion ADU in Studio City typically runs $30,000 to $80,000, but the spread depends heavily on wiring. Many 1940s and 1950s garages along the valley floor still carry knob-and-tube or aluminum feeds that must be re-fed from the panel before a bedroom or kitchenette gets signed off. We scope that in writing on day one, not as a surprise after demolition.
New Detached ADU
New construction ADUs in Studio City run $90,000 to $220,000. On the canyon lots near Mulholland, that number reflects excavating into a slope, pouring a stepped foundation, and shipping materials up a driveway a flatbed can’t always navigate. If you’re on a 91604 hillside lot, expect a grading plan and possibly a retaining-wall structural review. We’ve done enough of these to tell you which lots will trigger that before you commit.
Junior ADU & Interior Conversion
A JADU, typically a converted bedroom with a kitchenette inside the existing home footprint, is usually the fastest path to rental income in Studio City. These projects often run below the $45,000 floor of a full addition, depending on whether the existing wiring and plumbing can serve the new fixtures. On valley-floor ranches along Ventura Boulevard, that’s often a straightforward conversion. On older hillside builds, we check for fire-blocking and ventilation upgrades that the LADBS will require as part of any interior permit.
Studio City homeowners adding space often ask us about Kitchen Remodeling in Studio City and Bathroom Remodeling in Studio City at the same time. A second-story addition over an existing kitchen, for example, is the obvious moment to rework the footprint below. Both trades run off the same permit package, the same crew schedule, and the same written change-order discipline.
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
For windows and doors on Studio City additions and ADUs, we install Simonton, Ply Gem, PGT, and CGI products. On hillside lots in the fire zone, PGT and CGI impact-rated glazing matters for more than noise. We stock local parts for these lines and can pull windows for a Studio City job without a week-long wait, which keeps a framing schedule from stalling mid-addition. If a warranty issue comes up later, we’re the ones who installed it, and the 90-Day Done Right Promise is written into every contract.
Common Home Additions & ADU Problems We See in Studio City Homes
- Hillside foundation surprises. Studio City canyon lots are built on cut-and-fill pads, and we routinely discover older concrete retaining walls that a new ADU footprint will load. LADBS requires geotechnical review when that happens. We identify the trigger early and build the review into the original scope, not a change order halfway through excavation.
- Fire-zone compliance creep. On Studio City hillside lots within the Very High Fire Hazard Severity Zone, adding square footage often forces upgrades to vents, eaves, and siding on the existing house, even if those components weren’t in your original plan. This is the single biggest budget-buster for Studio City additions north of Ventura Boulevard, and flat-valley contractors don’t see it coming.
- Wiring and panel capacity. Studio City’s 1940s and 1950s valley-floor homes were never sized for an ADU’s added electrical load. We see aluminum branch wiring and 100-amp panels on Ventura Boulevard-area ranch homes every week. That’s a code-mandated upgrade before any ADU subpanel gets approved.
- Heat exposure on southern-facing additions. Studio City sits in a thermal bowl, and a south-facing second-story addition absorbs summer sun that accelerates deck coating and elastomeric membrane failure within five to seven years. We specify materials accordingly, especially on the hillside homes above the valley floor where temperatures run 10 to 15 degrees above coastal LA.
Pricing for Home Additions & ADU in Studio City, CA
A home addition in Studio City runs $45,000 to $130,000. A garage conversion ADU lands from $30,000 to $80,000. A new detached ADU runs $90,000 to $220,000. Junior ADUs and interior conversions typically start below the full-addition floor, depending on existing plumbing and electrical. On hillside lots, add grading, retaining-wall, and fire-hardening scope. On flat lots south of Ventura Boulevard, the main variables are existing wiring age and foundation condition.
Every scope, every allowance, and every price change arrives as a written change order before work happens. No surprise invoices at the end. Want a real number for your lot? Call (877) 610-1318 for a free estimate. We also offer a free second opinion on any written estimate you’ve already received.
We Also Serve Cities Near Studio City
Our crews run projects in Studio City and the neighboring communities of North Hollywood, Universal City, Sherman Oaks, and West Hollywood. If you’re shopping between cities, be sure you’re comparing hillside compliance costs, not just square footage. Let’s talk. Call (877) 610-1318 or learn more about Home Additions & ADU and Home Additions & ADU in Studio City.
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 - Home Additions & ADU in Studio City
We can typically begin design and permitting within two to four weeks of your first call, and the permit timeline depends on whether your Studio City lot falls in the hillside review corridor or on the valley floor. Flat-lot ADUs off Ventura Boulevard often clear LADBS faster than hillside projects. Call (877) 610-1318 and we’ll give you a realistic timeline for your specific lot.
Yes, we serve the entire Studio City area, including the 91604 hillside neighborhoods north of Ventura Boulevard down to the 91614 valley-floor streets near the LA River. The hillside and flat-lot zones have very different permit requirements, and we work both.
If a storm or an uncovered opening causes water intrusion during a Studio City project, call us at any hour. A live person answers our phone 24/7, and we’ll get a crew out to protect the work and your home. Storm response is one of the reasons Studio City homeowners hire a local contractor instead of an out-of-area bid.
A detached ADU in Studio City runs $90,000 to $220,000, and the same build in a flat community like North Hollywood or Van Nuys can land below that because there’s no hillside grading, retaining-wall review, or fire-zone compliance. That’s the cost difference people don’t see in an estimate line item until the permit plan check. We’re honest about it before you sign.
Every Studio City addition or ADU contract includes our 90-Day Done Right Promise in writing. If it’s not done right, Tom Barrett comes back and makes it right, on one call. Call (877) 610-1318 for details, and for a free estimate on your project.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Studio City homeowners with permits pulled, inspections signed, and prices in writing since day one.