Detached Garage Conversion in Woodland Hills, CA
A detached garage conversion in Woodland Hills typically costs between $110,000 and $160,000 when done as a full ADU with a kitchen and bath, and most projects are completed in 120 to 180 days from permit approval to final inspection. The process turns an existing standalone garage into a rentable apartment, an in-law suite for aging parents, or a dedicated workspace without touching the main house. Benson ADU Woodland Hills handles the whole thing: design, permits, the build itself, and the written guarantee behind it. You can reach us at (559) 282-2291 for a straight answer on whether your garage qualifies.
We’re part of the same team that builds Garage Conversion ADU in Woodland Hills, and a detached garage is often the smartest starting point on a property. The structure already exists. There’s a foundation, a roof, and four walls. What’s missing is everything that makes it livable: insulation, a proper bathroom, a real kitchen, a heating and cooling system, and the permits that make it legal. That’s the work we do every month across Woodland Hills, from Walnut Acres to the neighborhoods off Mulholland Drive.
Troy Eastman leads the team here. He’s a builder first, which means he’ll tell you what a detached garage conversion actually costs, what could slow it down, and what he’d recommend even if it’s the less expensive option. Call (559) 282-2291 and you’ll get a real person, not a phone tree.
When You Need Detached Garage Conversion
A detached garage conversion makes sense in a few specific situations. Here’s what we see most often in Woodland Hills:
- You want rental income but don’t want to share walls with a tenant. A detached ADU sits completely separate from your house. Your tenant gets their own entrance, their own address, and their own yard access. You keep your privacy and the rent check.
- An aging parent is moving in and needs true independence. A detached garage conversion gives mom or dad a full kitchen, a walk-in shower, and their own front door, while staying close enough that you can check in daily.
- Your work-from-home setup has outgrown the spare bedroom. Turning a detached garage into a dedicated office or studio keeps work physically separate from home life. No more conference calls interrupted by the dishwasher.
- The garage is already falling down or barely standing. If the structure needs major work anyway, converting it into livable square footage often pencils out better than repairing it and still using it for car storage.
- You bought in Woodland Hills specifically for the ADU potential. Many buyers look for homes with detached garages because the lot is already zoned for the structure. If the previous owner used it as a workshop, you’re sitting on an opportunity.
- Your main house can’t be expanded easily. Setbacks or a small lot that butts against a hillside might rule out a traditional addition. A detached garage already sits where it sits, so the path to more square footage is often simpler.
Our Detached Garage Conversion Process
Here’s how we take a detached garage from car storage to finished living space, step by step. The key difference with us: you get a written price before any of this begins, and a 365-Day Done Right Promise that stays in effect for a full year after completion.
- Free on-site walkthrough and garage assessment. We measure the existing slab, check the framing and roof condition, and look at where utilities run from the main house to the garage. We also check the lot’s setbacks, which is the legally required distance between a structure and the property line. All of this tells us whether your garage is a conversion candidate or a tear-down-and-rebuild candidate.
- Written proposal with a fixed line-item price. You get an itemized scope of work and a dollar figure on paper. No verbal ballpark that turns into something else later. We name the price before a single permit application is filed.
- Design and permit package. We prepare the architectural plans and submit them for building permits. Detached ADUs in California have specific requirements around size, ceiling height, and a separate entrance, and we handle the details.
- Demolition and structural prep. The old garage door comes out, the slab gets evaluated for a moisture barrier, and we frame the space for insulation, electrical, plumbing, and drywall. If the roof needs work, this is when we address it.
- Build-out with real kitchen and bath. We install the electrical panel, run plumbing for a full bathroom and kitchen, insulate to current Title 24 energy standards, and finish with flooring, fixtures, and paint.
- Final inspection and your 365-day written guarantee. We walk the finished space with you, complete city inspections, and hand you a written guarantee covering all covered work for a full year. If something fails, we come back and fix it. That’s not a promise we make casually.
Throughout the build, you get real-time progress updates and photos. If a question comes up at 9:30 on a Sunday night, a live person answers the phone. We don’t route you to a voicemail that gets returned on Tuesday.
Detached Garage Conversion Pricing in Woodland Hills
A detached garage conversion in Woodland Hills runs $110,000 to $160,000 for a complete ADU with a kitchen, bathroom, and separate entrance. For a simpler conversion without a full kitchen, the range is roughly $70,000 to $100,000. Here’s what moves the number:
| Cost Factor | Typical Impact on Price |
|---|---|
| Garage size (standard 2-car vs. oversized) | $25,000 – $45,000 difference |
| Foundation and slab condition | $8,000 – $25,000 if replacement or major repair is needed |
| Full kitchen with appliances | $15,000 – $30,000 |
| Bathroom build-out | $12,000 – $25,000 |
| Electrical panel upgrade | $3,000 – $6,000 |
| Insulation and drywall to Title 24 standards | $10,000 – $18,000 |
| James Hardie siding or exterior finish upgrade | $8,000 – $20,000 |
Those Woodland Hills numbers account for local labor rates, typical lot conditions in the area, and current material costs. The biggest wildcard is always the condition of the existing structure. Some garages in neighborhoods like Winnetka and Canoga Park adjacent to Woodland Hills were built in the 1960s with concrete slabs that have settled and cracked over 60 years of Valley heat. If the slab is too far gone, we may recommend a full rebuild, which changes the price and the timeline but also gives you a more reliable finished product.
Here’s what affects your specific quote:
- Whether we can reuse the existing slab. A healthy slab saves $8,000 or more. A settled or cracked slab means we either pour a new one or add an over-slab moisture barrier and leveling layer.
- Distance from the main house to the garage. Running utilities 15 feet versus 60 feet changes trenching and material costs. This varies widely from property to property in Woodland Hills, even on the same street.
- The roof’s condition. If the framing and sheathing are still solid, we can often insulate and air-seal from the inside. If there’s rot from years of Valley summer heat followed by winter rain, there’s additional scope.
- Finish selections. Cabinets, countertops, flooring, and fixtures can swing the budget by $10,000 to $25,000. We’ll walk you through options from builder-grade to premium and give you real prices on each.
- Air conditioning and heating method. Most clients choose a ductless mini-split system for a detached garage, which runs $5,000 to $12,000 depending on the unit’s capacity and brand.
Every quote includes the written price before any work starts. If we find something unexpected mid-project, we stop and bring it to you with a written change order. You never get a surprise invoice at the end. Estimates are free, and you can call (559) 282-2291 to schedule one.
Prefab Options for Detached Garage Conversions
If your existing garage isn’t worth saving or the footprint won’t work for what you need, we also build new detached ADUs using proven prefab systems from Tuff Shed and other manufacturers we’re authorized to source. Tuff Shed structures work well for garage-style ADUs that need to look like a natural part of the property. For more architecturally ambitious projects, we’ve built with Abodu and Cover systems that arrive as pre-engineered panels and go up in a fraction of the time of a fully site-built structure.
Here’s the honest trade-off. A site-built conversion uses what’s already standing, which often saves money upfront but hides surprises inside the walls. A prefab new build costs more upfront but gives you a predictable structure with a manufacturer’s warranty behind the envelope. We’ll show you pricing for both paths and let you choose based on your actual numbers.
For exterior finish, we recommend James Hardie fiber cement siding on most projects in Woodland Hills. It holds up to Valley sun better than traditional wood siding, and it won’t warp the way vinyl can in sustained heat. You can also research James Hardie independently to verify what you’re getting, which we fully encourage.
Why the Written Guarantee Matters
Most contractors finish a job and disappear. We’ve all heard the stories. The paint starts peeling at month six and the phone number doesn’t work anymore. Our 365-Day Done Right Promise exists to put that risk on us instead of on you.
Here’s exactly what it means: every detached garage conversion we build in Woodland Hills comes with a written guarantee covering all work done by our team for a full year after the final walkthrough. If any covered work fails during that year, we send someone back to fix it. If that repair has an issue, we come back again. For free. The guarantee is written into your project documents, with author signatures from Benson ADU Woodland Hills, not a handshake.
This is part of the Relay Home Co. framework we operate under. The parent company has been around since 2006, and this location is independently owned and operated, led by Troy Eastman. The guarantee follows the work, not the company’s mood that month.
FAQs – Detached Garage Conversion
How much does a detached garage conversion cost in Woodland Hills?
A full detached garage conversion to a rent-ready ADU in Woodland Hills costs $110,000 to $160,000 including design, permits, construction, and finishes. Smaller conversions without a full kitchen run $70,000 to $100,000. Your specific price depends on garage size, slab condition, and finish level. Call (559) 282-2291 for a written quote based on your actual structure. Estimates are free, and the price we give you is the price you’ll pay.
How long does a detached garage conversion take?
Most detached garage conversions in Woodland Hills take 120 to 180 days from permit approval to final inspection. Permit processing time varies by jurisdiction and is outside our control, but we prepare complete plan sets to minimize back-and-forth with the reviewing agency. Once we start building, you’ll see progress every week, and we send photo updates so you can track it from your phone.
Is it cheaper to convert a detached garage or build a new ADU?
Converting an existing detached garage is usually $30,000 to $60,000 cheaper than building a new ADU of the same size, because the foundation, framing, and roof already exist. But that assumes the existing structure is in good shape. If the slab needs replacement or the roof framing is compromised, the savings shrink, and a new prefab build from Tuff Shed or Abodu might actually make more sense. We’ll give you prices for both so you can compare on your actual numbers, not a guess.
Can you convert my detached garage into a legal ADU in Woodland Hills?
Yes, if the garage meets California’s ADU requirements for size, ceiling height, and setbacks, and if the property has room for the required separate entrance. Most detached garages in Woodland Hills qualify. During your free on-site walkthrough, we’ll check the structure against current ADU standards and tell you exactly what’s possible, what’s borderline, and what won’t fly. Call (559) 282-2291 to schedule that walkthrough.
Does the 365-Day Done Right Promise apply to detached garage conversions?
Yes, every detached garage conversion we build gets the full written guarantee covering all work for 365 days from final inspection. If any covered work fails in that year, we return and repair it at no cost. If our repair has an issue, we come back again. The guarantee is documented in your project file with owner signature. That’s the standard for every Benson ADU Woodland Hills project, no exceptions.
Do you handle the permits for a detached garage conversion?
Yes, we prepare and submit the full permit package, including architectural plans and Title 24 energy calculations. Detached ADUs need building, electrical, plumbing, and sometimes mechanical permits, plus a certificate of occupancy at the end. We manage the entire process and keep you updated at each step. You won’t have to make a single trip to a government office.
Is a Detached Garage Conversion Right for Your Woodland Hills Property?
If you have a detached garage that’s collecting boxes, old furniture, or a car that hasn’t moved in two years, you’re leaving square footage on the table. That structure could be producing $2,500 to $3,500 a month in Woodland Hills rental income, depending on the size and finish level. Or it could house a parent, an adult kid, or your own office.
The first step is a 30-minute conversation and a free walkthrough. Todd will measure the space, look at the slab, check the roof, and give you a straight answer: what’s possible, what it’ll cost, and how long it’ll take. Then we put that answer in writing.
Call (559) 282-2291 to schedule your free estimate. A live person answers, day or night. We’re happy to talk through the process, answer your questions, and help you figure out if a detached garage conversion is the right move for your property and your budget. No pressure, no pushy sales pitch, just a builder who’ll tell you the truth.
Written by Troy Eastman, Owner at Benson ADU Woodland Hills, serving Woodland Hills.
