Otto ADU ADU projectLicense Verified

Otto ADU logoOtto ADU

Serving Los Angeles, Pasadena, South Pasadena, Glendale & more · Based in Los Angeles, CA

Pricing on request — unlock Otto ADU's ADU pricing for your project

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Otto ADU ADU project 4
Otto ADU ADU project 5

About Otto ADU

Otto ADU (legal entity Homestead Build, LLC) is a Los Angeles design-build firm specializing in custom detached ADUs, garage conversions, and pre-designed ADU plans, handling design, in-house permitting, and full construction management. Founded by Sean, who has been building ADUs since 2019, the team says it has designed 100+ ADUs and worked with 70+ homeowners across LA County. It holds a CSLB Class B general building contractor license (#1081287).

CSLB 1081287 · B — General Building Contractor

Otto ADU ADU pricing

Pricing varies by unit type, size, finishes, and site conditions. Unlock Otto ADU's project pricing for your lot — free, no obligation.

Unit typeTypical sizePricing
Studio / JADU≤ 500 sq ftPricing locked — unlock to view
1-bedroom detached ADU600–750 sq ftPricing locked — unlock to view
2-bedroom detached ADU750–1,000 sq ftPricing locked — unlock to view
Garage conversion400–600 sq ftPricing locked — unlock to view
Attached ADU400–800 sq ftPricing locked — unlock to view

Pricing is unlocked per project

Share a few details and we'll send Otto ADU's pricing for your build.

Services Otto ADU offers

  • Detached ADUs
  • Garage Conversions
  • Custom ADU Design
  • Pre-Designed ADU Plans
  • Permitting & Feasibility
  • Construction Management

What Otto ADU handles

Design & permitting

In-house design and full permit handling.

  • Architectural design & 3D renderings
  • Structural & Title 24 energy plans
  • City plan-check submittal & corrections

Construction

Turnkey ground-up and conversion builds.

  • Foundation & framing
  • Detached, attached & garage-conversion ADUs
  • Electrical, plumbing & HVAC

Financing

Guidance and lender introductions.

  • Renovation / construction-loan guidance
  • HELOC & cash-out refinance referrals
  • ADU-specific (after-build-value) lenders

Project types

ADU formats this builder takes on.

  • Detached ADU
  • Attached ADU
  • Garage / ADU conversion

Warranty & support

What's covered after move-in.

  • Workmanship warranty
  • Manufacturer materials warranties
  • Dedicated project manager

Reviews of Otto ADU

4.613 verified reviews
Verified

We hired Otto ADU to design and supervise the building of our new ADU. They did a great job. The new ADU (which replaced our garage) is beautiful and, despite its small footprint, is a airy, spacious, and attractive place to be. We are really enjoying it. The project took longer than anticipated, but on the whole went very well. Highly recommend these guys.

ARP in LA0 found this helpful
Verified

The Otto team was absolutely amazing! 10 out of 10! I have nothing but great things to say about the entire process (including all of the contractors they hired). From start to finish, Otto helped us design, permit, build, and finish our ADU. They made it so easy! Starting with the initial site visit, they were so knowledgable about the process and various city-specific laws and requirements involved in the ADU permitting process. We immediately knew we were dealing with professionals. The design process was very collaborative and they were open to all of our ideas, yet they were more than willing to (politely) tell us when something was out of our budget or not feasible. They kept in mind all of our various requirements (storage space, light, vaulted ceilings, cabinetry, etc.) and they really made an effort to bring our dream design to life. They provide you with a portfolio of finishes that you can select from (if you are feeling overwhelmed with designing) or you can select your own finishes - you are not hemmed in by what they have already used or have on file, they are very open to any and all new ideas! But, it's certainly helpful to see how things look in their prior projects. The construction process was extremely smooth (shockingly, as I had heard horror stories about how construction can go). The contractors they brought in (Build Tuff) were friendly, polite, and worked tirelessly to keep everything on or ahead of schedule. They also always cleaned up the site before they left for the weekends so we (and our dogs) could still use our backyard. During the entire process, the Otto team came by for regular visits and kept us up to date with their helpful client portal where we could follow along with the schedule of events, see when upcoming payments would need to be made, and receive a thorough update of the progress every Friday. They also checked in with us throughout to make sure we were liking the design - and were very understanding when a couple times we changed our minds on design elements once we saw them in place. The finished project is absolutely gorgeous - it's even better than I imagined! I cannot believe that our gross, rat-infested garage is now a beautiful studio. It's such a calm, peaceful space and we are so proud to show it off. It is all thanks to Otto ADU. Thank you, Otto, for bringing our dreams to life!

Melissa Deni0 found this helpful
Verified

My experience with Otto ADU was truly great. Sean came to our location for an in depth site visit and carefully talked us through the process of what this experience would be like from start to finish. He sent an extremely detailed and thoughtful proposal that was easy to comprehend. We didn't end up moving forward because of a change of plans (nothing to do with Otto ADU), but I would 100% use them in the future if the opportunity arises.

Maddie Gavin0 found this helpful
Verified

We had a great experience working with the entire team at OTTO for our ADU garage conversion. They were very knowledgeable, professional, and supportive and we greatly appreciated their ability to hold meetings via zoom during the planning and design phases in which they could share and update designs in real time. This was helpful during the Pandemic but also a great way to coordinate given my and my husband's busy schedules. We also had to tackle some challenging design issues because of our intended uses of the space and they were patient throughout and helped us achieve our goal.

christine page0 found this helpful
Verified

We are very happy with our experience with Otto converting our 400 sq ft garage into a beautiful ADU for our 97 year old grandmother so that she can live closer to us. They created a beautiful design that fit exactly what we wanted and came up with many specific details for aging in place that we did not think of ourselves, including increased lighting and roll in shower with accessible handrails and elevated toilet. We were impressed with their professionalism and attention to detail and responsiveness and did not feel like they were trying to cut corners and were very upfront and open and personal with us. With the initial set pricing including all design and permits and construction and appliances we feel like we got a great deal. All of our friends are impressed with the construction quality and finished product and we have referred several friends that are interested in creating their own ADU with Otto.

John Root0 found this helpful

Frequently asked questions about Otto ADU

What does Otto ADU offer?

Otto ADU is a full-service ADU builder serving Los Angeles, CA, handling design, permitting, and turnkey construction for detached ADUs, attached ADUs, garage conversions, and junior ADUs (JADUs). Otto ADU holds a 4.6-star rating across 13 verified homeowner reviews.

Is Otto ADU licensed and insured?

Yes. Otto ADU holds an active CSLB license (1081287), classified B — General Building Contractor, and is bonded and insured.

How much does Otto ADU charge to build an ADU?

Otto ADU prices every ADU per project — your cost depends on size, finishes, and site conditions. Garage conversions are the most affordable path; detached units cost more. Pricing is unlocked per project: request a quote to get Otto ADU's exact, no-obligation estimate for your lot.

What areas does Otto ADU serve?

Otto ADU builds ADUs in Los Angeles, Pasadena, South Pasadena, Glendale, Burbank, Culver City, and surrounding areas.

How long does Otto ADU take to build an ADU?

Most ADU projects run 6–12 months end to end — roughly 1–2 months for design and permitting (California caps plan check at 60 days for compliant units) and 4–8 months of construction. Otto ADU confirms a timeline for your specific project during the feasibility consultation.

How do I get a quote from Otto ADU?

Tap any "Get a Quote" button on this page to share a few details about your property and project. We'll confirm your service area, match you directly with Otto ADU, and set up your free feasibility consultation — no obligation.

Where Otto ADU works

Los Angeles, CAService-area map
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  • City Building & Safety
  • Planning Department
  • Permit Center

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