Abodu ADU in San Bernardino, CA | Ellery ADU Studio Rialto
We provide independent Abodu service across San Bernardino, adapting factory-built prefab units to the city’s aging ranch-home infrastructure. The one thing that makes our Abodu work here different: we expect the 100-amp panel upgrade, the HVAC upsizing for 115°F days, and the Cajon Pass wind-haul inspection before the flatbed ever reaches your lot. Call (951) 476-1467 to schedule your free estimate.
Why San Bernardino Residents Choose Us for Abodu Service
We’ve worked on Abodu installs across the Inland Empire since 2015, the year California’s ADU laws shifted. That timing matters. We learned prefab systems alongside the evolving code, not after the fact. Our Abodu sales & service covers every model line, but our real specialty is what happens after the factory build: site prep on 1950s concrete slabs, utility adaptation for panels that predate modern loads, and the permit set that ties it together.
Nadia Ellery grew up in Santa Monica watching her uncle pull permits for San Bernardino Garage Conversion ADU projects. She studied architectural drafting and construction technology at Santa Monica College before moving into design-build full time. Her crew has been active across the Rialto area for several years, including the Willow Avenue corridor. She keeps a battered California ADU Handbook on her desk. The paperwork is the project. Everything else is just construction.
We’re not Abodu-authorized. We’re independent. That means we use OEM structural connectors and panel-seam gaskets where engineering demands it, and quality aftermarket HVAC and electrical where specs allow. For structural defects still under Abodu’s factory warranty, we send you back to them. For everything else - panel upgrades, heat pump upsizing, foundation adaptation on San Bernardino’s expansive soils - we handle it under one contract at one written price, per Haven Standard Clause 1.
Common Abodu ADU Problems We Solve in San Bernardino
- Transport and set-day racking from Cajon Pass hauls. Abodu’s panelized modules ride flatbeds over Cajon Pass on I-215. Santa Ana wind events and freeway vibration loosen factory fasteners. We inspect wall-panel seams at delivery, torque structural connectors to spec, and re-seal gaps before the crane sets the unit.
- HVAC undersizing for valley-floor heat. Factory heat pumps rated for milder climates short-cycle and fail within two summers when San Bernardino hits 108-115°F. We spec 3-ton replacements for west-facing installs, sized for the actual load, not the catalog.
- Utility stub-out mismatch with 100-amp legacy panels. Abodu units expect modern 200-amp service. Most San Bernardino ranch homes still run original 100-amp panels. We upgrade the main, re-ground the mast, and coordinate the city inspection before the unit gets power.
- Foundation settling on slab-edge transitions. Abodu’s pier-and-beam base meets 1950s-70s concrete slabs on expansive soils. Rare heavy rains trigger soil movement. We shim, re-level, and re-seal panel joints when racking appears.
- Fire-hazard zone compliance near the foothills. Parcels in Very High Fire Hazard Severity Zones need ember-resistant venting, ignition-resistant cladding, and fire-rated assemblies that Abodu’s standard spec doesn’t include. We retrofit these before the city signs off.
Before
AfterAbodu Service in San Bernardino: What Local Conditions Mean for Your Equipment
San Bernardino’s building department will not sign off on a second dwelling unit until the property’s original 100-amp main panel - standard equipment on the city’s 1950s-70s ranch homes - is upgraded to 200 amps. This isn’t a suggestion. It’s a hard stop in plan check. Almost every Abodu install in San Bernardino carries this mandatory step, which means your project timeline must include PG&E coordination, a new service mast, and a city inspection before the ADU can be occupied. On a Westside block near downtown, we set an Abodu Two-Bedroom on a deep rear lot that backed to an alley, but the century-old 100-amp panel tripped the city’s plan check before we could pull the final. We upgraded the service to 200 amps, re-grounded the mast, and upsized the factory heat pump to a 3-ton unit rated for 115°F. The owner had it rented to a warehouse logistics worker within three weeks of sign-off. That sequence - panel, HVAC, tenant - is typical here, not exceptional.
Abodu Models & Products We Service in San Bernardino
We work on the full Abodu line: the Studio single-room unit, the One-Bedroom, the Two-Bedroom, and the Garage Conversion kit. Each arrives panelized from the factory with structural connectors and panel-seam gaskets that we inspect on delivery. For the Studio and One-Bedroom, the most common San Bernardino adaptation is electrical: these units draw enough to force the 100-to-200-amp upgrade on virtually every flatland install. The Two-Bedroom adds HVAC load that factory heat pumps rarely handle without upsizing. The Garage Conversion kit is the outlier - it uses the existing structure, but the same panel and climate rules apply. We stock OEM structural hardware locally for same-week re-sealing work, and source aftermarket HVAC and electrical components through standard Inland Empire supply houses. Turnaround depends on what failed, not on whether we understand the system.
Abodu Service Pricing in San Bernardino
Prefab ADU installation in San Bernardino typically runs $85,000-$140,000 all-in, drawings through final inspection, depending on model size and site complexity. Electrical panel upgrades add $4,500-$8,500 for the 100-to-200-amp conversion, including PG&E coordination and city inspection. Foundation and grading work on expansive soils runs $3,000-$12,000. HVAC upsizing from factory spec to 115°F-rated equipment adds $2,500-$5,500. Every project is quoted with a written price before any work begins, per Haven Standard Clause 1. No change orders. No door-side upsells. Call (951) 476-1467 for your exact numbers - estimates are free.
Serving San Bernardino, CA - Our Local Coverage Area
We’re based in the San Bernardino 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 - Abodu ADU in San Bernardino
Yes. San Bernardino’s building department requires 200-amp service for any property with two dwelling units. The 100-amp panels original to 1950s-70s ranch homes cannot support the ADU’s additional load. We handle the upgrade, the PG&E coordination, and the inspection as part of our single-contract scope. Call (951) 476-1467 for a written quote.
No. Factory-spec heat pumps short-cycle and fail within two summers on valley-floor installs. We upsize to 3-ton equipment rated for 115°F continuous operation. This is standard on our San Bernardino Abodu work, not optional. Call (951) 476-1467 to discuss your lot orientation and load calculation.
Yes, with retrofit. Abodu’s standard spec lacks ember-resistant venting and ignition-resistant cladding required in these zones. We add both, plus fire-rated assemblies, before city inspection. The added scope is line-itemed in your written quote upfront. Call (951) 476-1467 for a zone-check and estimate.
Most flatland lots run 7,000-10,000+ sq ft, well within California’s by-right ADU coverage limits. Deep backyards and rear-alley access on the Westside and near downtown make detached units straightforward. The constraint isn’t space - it’s the infrastructure (panel, HVAC, foundation) on the existing house. Call (951) 476-1467 for a site-specific assessment.
Abodu delivers. We handle everything after the flatbed arrives: crane coordination, set-day inspection for transport racking, utility connection, panel upgrade, HVAC upsizing, and final inspection. One contract covering our ADU Design & Permitting in San Bernardino. One written price. No gap between designer and builder to blame when something is off. Call (951) 476-1467 to schedule.
Service Areas Near San Bernardino
We cover San Bernardino service area properties and surrounding cities including Abodu service in Rialto, Abodu service in Fontana, Rancho Cucamonga, Riverside, and Redlands. The same 100-amp panel rules, heat-load calculations, and fire-zone retrofits apply across the Inland Empire, with San Bernardino’s warehouse-corridor rental demand making it the strongest yield market we serve.
Book Your Abodu Service in San Bernardino Today
Call (951) 476-1467 to schedule your free estimate. A live person answers 24/7. Bring any written estimate you already have - we’ll give you a free second opinion. Every quote includes a written price, a documented photo record, and the 365-Day Done Right Promise.
Written by Nadia Ellery, Owner at Ellery ADU Studio Rialto, serving San Bernardino since 2015.