Boxabl Garage Conversion Contractor in San Diego: What to Know First
Boxabl garage conversion in San Diego typically runs $85,000 to $140,000 for a permitted attached conversion, and most jobs take 10 to 16 weeks from first walkthrough to final inspection. We’re an independent Boxabl service provider, which means we work on your Boxabl unit without being tied to factory pricing or factory timelines. If you own a Casita and you’re thinking about turning your existing garage into living space alongside it, this page tells you what that actually takes.
This page is for San Diego homeowners who already own a Boxabl Casita and now need the garage converted, or who are planning both at once. Call (619) 376-2760 and you’ll get Russ Delmar or a member of our team on the line, not a voicemail tree.
How Boxabl Products Fail – and How We Fix Them
Boxabl builds a genuinely clever product. The Casita is a folding steel-frame module with closed-cell foam insulation and panels that ship flat and unfold on site. But San Diego’s climate and soil do specific things to these units, and we’ve learned the failure patterns firsthand on conversions across North Park, Clairemont, and Chula Vista.
- Foundation pad settling on expansive soil. The Casita was designed to sit on a relatively simple pad, but parts of San Diego east of the 805 sit on clay that swells and contracts with moisture. When a garage conversion ties into a Boxabl that’s shifted even an inch, door headers bind and corner seams open. We’ve fixed this by adding helical piers under the Boxabl side before framing the connection, then floating the transition wall so it moves independently.
- Roof seam leaks at the folding joint. The Casita’s roof hinge is robust, but after a few years of San Diego’s hot-dry to cool-damp cycles, the EPDM seal at the fold line can crack. Homeowners usually see a faint water stain on the ceiling near the centerline and assume it’s condensation. It’s usually the seam. We remove the old seal, install a fresh one, and add a secondary lap flashing before the garage roof ties in.
- HVAC mini-split undersizing when the garage becomes conditioned space. A Casita ships with a mini-split sized for the unit alone. The moment you connect a converted garage, that system is now carrying another 400 to 600 square feet. We routinely see owners running the unit at full blast in August and still hitting 80 degrees inside. We calculate the combined load and either upsize the outdoor unit or add a separate ductless head in the garage, depending on your panel capacity.
- Panel capacity that doesn’t account for garage circuits. The factory panel in a Casita is sized tightly for the unit itself. Add a garage conversion with outlets, lighting, maybe a small kitchenette, and you’re over the load calculation. We’ve seen breakers trip on the first Thanksgiving dinner in the new space. Our fix is a subpanel fed from the main service, or an upgrade to the Boxabl’s panel if your service can handle it.
- Transition wall framing done wrong by the previous contractor. This is the one that makes Russ shake his head. A Boxabl sidewall is steel and foam, not wood. If someone frames a garage-to-Boxabl doorway the same way they’d frame into a stick-built house, the connection gaps and the door sticks. We use steel track and anchor bolts matched to the Casita’s wall profile, then foam-seal the joint before taping. Done wrong it leaks air and light. Done right you can’t feel a draft with your hand on the seam.
Our Boxabl Garage Conversion Contractor Process
Here’s how a Boxabl garage conversion works with us, from the first phone call to the day the city signs off.
- 1
Site walk and honest conversation. Russ walks the property with you, looks at the Boxabl, the garage, the panel, and the pad. He’ll tell you what’s feasible and what’s not, and give you a real cost range on the spot. Not a vague “we’ll send something over.”
- 2
Written price and scope. Before any work starts, you get a written line-item price. That price doesn’t change at the door. If we find something unexpected during demo, we stop and talk to you before spending another dollar.
- 3
Permit drawings and submittal. We draw the conversion plans, note the Boxabl connection details, and submit to the City of San Diego or your local jurisdiction. Permitted and inspected means a city official signs off that the work meets code. That’s the standard on every job we do.
- 4
Construction with a clean site. Our crew is background-checked and uniformed. We show up in the arrival window we gave you. The site gets cleaned at the end of every day, not just at the end of the job.
- 5
Testing and city inspection. We test every system, walk the job with you, and stay on site until the inspector passes it. If the city has a note, we fix it and get the re-inspection.
- 6
Written guarantee. You get the 365-Day Done Right Promise in writing before we leave. If something isn’t right within a year, we come back and make it right. Free return visit, no argument.
What Boxabl Garage Conversion Contractor Costs in San Diego
Honest numbers, because you shouldn’t have to call just to get a ballpark. Here’s what we see across San Diego County for Boxabl-adjacent garage conversions:
- Attached garage conversion to living space (no plumbing): $85,000 to $115,000 depending on finish level and electrical work.
- Attached garage conversion with kitchenette and bathroom: $120,000 to $155,000. Plumbing and sewer tie-in move the needle.
- Detached garage conversion to ADU: $140,000 to $190,000 when it includes a new foundation connection, utility trenching, and a full bathroom and kitchen.
- Boxabl-to-garage transition work only (repairing or building the connecting doorway, sealing, flashing): $4,500 to $9,000, depending on what the previous contractor left behind.
What moves the price: plumbing distance to the sewer line, whether your panel has capacity, whether the Boxabl needs structural correction at the connection point, and your finish choices. Call (619) 376-2760 for a written, line-by-line estimate. Estimates are free.
Why San Diego Homeowners Call Lodgewick ADU San Diego for Boxabl Work
Most of the Boxabl jobs we take over started with someone else. A crew cut a doorway into the steel sidewall without the right anchors. A pad was poured without checking soil conditions. A promise was made and then the phone went quiet. That’s where we come in.
Lodgewick ADU San Diego is part of the Kingswell family of home-service companies, and we’ve been doing ADUs, garage conversions, and home additions in San Diego since 2010. Every project runs on The Kingswell Way: say the price before the work, show up in the window given, leave the place cleaner than found, put the guarantee in writing, and come back if it fails. That’s not a slogan. It’s the 365-Day Done Right Promise, and you get it in writing on every single job.
We also work with other leading ADU brands, including Abodu, Cover, and Dvele. So if you’re weighing a Boxabl Casita against a Cover unit or an Abodu, we can give you straight answers about how each one performs on a San Diego lot, not a sales pitch.
FAQs
It can, depending on how the connection is done. The Boxabl warranty covers the unit itself, but modifications that compromise the wall system or roof seam can void portions of it. As an independent Boxabl service provider, we’re careful to work in ways that preserve your warranty coverage, and we’ll document every connection detail so you have a paper trail if a warranty claim ever comes up. Call (619) 376-2760 if you want us to review your specific situation before you start.
Yes. This is a large portion of our Boxabl work in San Diego. We’ve corrected bad doorway framing, undersized electrical work, leaking roof seams at the hinge, and pours that settled. Russ will walk the site and tell you exactly what’s salvageable, what needs to come out, and what it’ll cost in writing. Call (619) 376-2760 and we’ll schedule the walkthrough.
Yes, always. A garage conversion that adds living space in San Diego requires city permits and inspections, period. We handle the drawings, the submittal, and the inspections, and we stay on the job until the city signs off. No unpermitted work, no shortcuts.
Most attached garage conversions run 10 to 14 weeks. Detached conversions with plumbing and a new connection run 14 to 16 weeks. Permit review time at the city can add a few weeks depending on their queue. When we give you a start date, that’s the date we show up.
You call us. If the work isn’t done right within the first year, the 365-Day Done Right Promise means we come back and fix it, free of charge. That promise is in writing before we start the job, not buried in fine print after. Call (619) 376-2760 and a live person answers, any hour, any day.
Tell me what you’re hoping to build, and we’ll tell you what it actually takes – cost, timeline, and all the permit steps – before you spend a dime. Call (619) 376-2760 to schedule your free estimate with Russ and the Lodgewick ADU San Diego team.
Written by Russ Delmar, Owner, Lodgewick ADU San Diego, serving San Diego and nearby areas.
