Garage Conversion ADU in Sherman Oaks - Plans, Permits & Build, One Fixed Price

Fast, Reliable Garage Conversion ADU Across Sherman Oaks

A garage conversion ADU in Sherman Oaks typically runs $85,000-$165,000 all-in, from measured drawings through final LADBS inspection, with detached garage conversions landing at the higher end once seismic retrofit needs surface. We’re the Garage Conversion ADU team at Ellery ADU Studio, and our crews serve Sherman Oaks from our Los Angeles office - close enough that we know the difference between a 1950s ranch tract near Ventura Boulevard and a 1970s build off Woodman. If you’re weighing an ADU against the cost of your mortgage, call (213) 329-7167. We’ll give you a written price before any work starts, per Haven Standard Clause 1.

Call (213) 329-7167

Why Ellery ADU Studio West Hollywood Is Sherman Oaks’s Preferred Garage Conversion ADU Company

We’ve designed, permitted, and built ADUs across the San Fernando Valley since 2015 - the year California’s ADU laws shifted - and Sherman Oaks remains one of our most requested markets. Homeowners here research hard before calling, and they should: this is a six-figure decision that lives on your property for decades.

Our Sherman Oaks clients receive the same documentation package as every Ellery project: a permit set treated as the core product, a written price locked at signing, and a documented photo record on every site visit. Under Clause 5 of The Haven Standard, the scope is locked at signing; no door-side upsells, no scope creep. The 365-Day Done Right Promise applies in writing - if the finished ADU is not built to the permitted drawings, we make it right.

Response time matters when you’re holding a contractor’s quote with an expiration date. Our scheduling team dispatches to Sherman Oaks regularly, and a live person answers calls 24/7. No voicemail queue, no callback promise that doesn’t materialize.

Nadia Ellery built this studio on the premise that the designer-versus-builder blame gap derails most ADU projects. One contract, one written price, one point of accountability. That’s the model we bring to every Garage Conversion ADU in Sherman Oaks.

Our Garage Conversion ADU Services in Sherman Oaks

Detached Garage Conversion

Detached garage conversions are the most common ADU project we see in Sherman Oaks, and they’re also the most likely to carry hidden structural costs. Because Sherman Oaks was among the Valley’s hardest-hit neighborhoods in the 1994 Northridge earthquake, many main houses here carry retrofit documentation while the detached stucco garage - the most common ADU conversion target on these 6,000-9,000 sq ft ranch lots - still has unbolted mudsills and unbraced cripple walls that LADBS flags at structural inspection once the conversion permit pulls a whole-parcel review.

On a conversion off the 1950s ranch tract near Ventura and Van Nuys, our crew opened the detached garage walls and found the main house had post-1994 retrofit paperwork on file while the garage below still sat on unbolted mudsills with no cripple-wall sheathing - exactly the split LADBS records show across much of Sherman Oaks. We had already scoped a seismic allowance into the contract, so we priced the plywood sheathing and anchor bolts in writing, got sign-off, and only then framed the bathroom partition and pulled the 60-amp panel for the new subpanel and mini-split circuit.

A typical detached garage conversion in Sherman Oaks runs $95,000-$165,000. That range assumes a 400-550 sq ft footprint, seismic retrofit of the garage structure, 100-amp subpanel upgrade, mini-split HVAC, and full bathroom and kitchenette. If your slab is sound and your electrical already feeds a 200-amp main, you’ll land lower. If the cripple walls need full sheathing and the foundation needs anchoring, you’ll land higher. Either way, the price is written before we start.

Attached Garage Conversion

Attached garage conversions in Sherman Oaks often share a wall with the main house, which changes the fire-separation and sound-attenuation requirements under LADBS code. We typically specify one-hour fire-rated assemblies between the ADU and the existing dwelling, with resilient channel and batt insulation for acoustic separation. These conversions run $85,000-$140,000 in Sherman Oaks, depending on whether the existing garage slab meets current habitability standards and whether the shared wall needs structural reinforcement.

Garage Partition & Bathroom Add

Not every Sherman Oaks homeowner wants a full kitchenette and separate entrance. Some need a bathroom and bedroom partition for an aging parent, a home office with plumbing, or a rental unit that shares laundry with the main house. We call this the partial conversion, and it’s often the right move on a tight lot or a tight budget. These projects run $45,000-$85,000, though we still recommend budgeting for the electrical and HVAC upgrades that LADBS will require once the space is classified as habitable.

Garage JADU

A Junior ADU - a JADU - is carved from existing space within the walls of the primary dwelling or an attached garage, must share bathroom facilities with the main house, and is capped at 500 square feet. In Sherman Oaks, the JADU path works well for homeowners who want rental income without the full cost of a standalone ADU. The garage JADU typically runs $35,000-$65,000, but the same caveats apply: if your 1950s electrical panel can’t handle the new circuits, or if the garage slab needs moisture remediation, those line items get priced in writing before we touch a wall.

Carport Conversion

Carport conversions are less common in Sherman Oaks than in neighborhoods with older housing stock, but they do appear on some 1960s and 1970s builds. The challenge is creating four walls and a conditioned envelope where there were two posts and a roof. Foundation, framing, and weatherproofing costs push these toward the higher end of the detached conversion range.

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Trusted Brands We Service in Sherman Oaks

Ellery ADU Studio specifies and coordinates prefab and modular systems within our single-contract model. For Sherman Oaks projects, we’ve installed James Hardie fiber-cement siding on multiple garage conversions where fire-resistive exterior cladding is specified by LADBS or desired by the homeowner for wildfire-season durability. We’ve also coordinated Abodu and Cover units on adjacent new-detached ADU projects where the garage conversion is phase one and the backyard unit is phase two. Every brand selection is documented in the permit set, not decided in the field.

Common Garage Conversion ADU Problems We See in Sherman Oaks Homes

• Seismic retrofit asymmetry. Owner assumes the post-1994 retrofit covers the whole parcel, so no contingency is budgeted when the detached garage’s mudsills and cripple walls fail the structural review triggered by the ADU permit. We always scope a seismic allowance into Sherman Oaks contracts.
• Undersized electrical service. Walls come open on a 1950s-1970s wood-frame stucco garage and reveal undersized 60-100 amp service, cloth or aluminum branch wiring, and no room for a mini-split or ERV circuit without a panel upgrade. This is standard, not exceptional.
• Failed slab waterproofing. Slab-on-grade or raised garage floors with failed original waterproofing are drywalled over before the source is fixed, so moisture and drainage problems reappear after the ADU is occupied and insulated. We inspect and document slab condition before framing begins.
• Inadequate HVAC sizing for Valley heat. Sherman Oaks is deep in the San Fernando Valley bowl and routinely hits 100-108°F during summer heat events - 15-20°F hotter than coastal LA neighborhoods - making a properly sized mini-split or ducted HVAC system a mandatory line item for every ADU, not an upgrade. The Valley’s poor air dispersion during wildfire season also drives demand for ERV/HRV ventilation with MERV-13 filtration in new ADU builds.

Pricing for Garage Conversion ADU in Sherman Oaks, CA

We Also Serve Cities Near Sherman Oaks

Our crews work across the central and east Valley, including Van Nuys, Studio City, Tarzana, and North Hollywood. Each city carries its own LADBS sub-office procedures, seismic history, and housing-stock quirks - we price accordingly, in writing, every time.

FAQs - Garage Conversion ADU in Sherman Oaks