Cover ADU in San Bernardino, CA | Ellery ADU Studio Rialto
Cover ADU service in San Bernardino runs $180,000-$340,000 all-in, drawings through final inspection, for most Model 1 through Model 3 installations on flatland ranch lots. What makes our Cover work here different is the 100-amp-to-200-amp electrical upgrade we bake into virtually every San Bernardino quote - because the city’s building department won’t approve a second dwelling unit on original mid-century service, and most contractors discover this too late. Call (951) 476-1467 to schedule your free estimate with a written price before any work starts.
Why San Bernardino Residents Choose Us for Cover Service
We’ve shepherded Cover panelized ADUs through San Bernardino’s building department since the city’s ADU ordinance first aligned with state law in 2020. Nadia Ellery, our principal, grew up in Santa Monica watching her uncle pull permits for San Bernardino Garage Conversion ADU projects - she learned early that the difference between a good project and a bad one is mostly paperwork. That background shows up in how we handle Cover’s factory panel systems: we specify and coordinate the shell, the site-built foundation, the utility connections, and the permit set as a single contract at a single written price.
We’re an independent Cover service provider, not manufacturer-authorized. Our credibility comes from completed, inspected units on San Bernardino’s flatland ranch lots, not from a dealer agreement. When Cover’s weather barrier wrinkles during transport on I-215 or I-10, we catch it at framing inspection and tape every seam before stucco goes on. When the standard HVAC spec underperforms on a 112°F August afternoon near the BNSF corridor, we upsize the tonnage and seal the ducts tight. And when the original 100-amp panel won’t pass plan check - which is almost always - we upgrade it as part of the same written scope, not a surprise change order.
Every project is governed by The Haven Standard: written price before work starts (Clause 1), documented photo record on every visit, and our 365-Day Done Right Promise backed in writing. A live person answers calls 24/7.
Common Cover ADU Problems We Solve in San Bernardino
- Wrinkled or separated weather barrier on wall and roof panels. Cover’s factory-applied barrier can fail during flatbed transport on I-10 and I-215. In San Bernardino, where Santa Ana winds rip through the Cajon Pass at 60+ mph, an untaped seam becomes an air-leak point that drives up cooling costs and fails Title 24. We inspect every panel at framing and re-tape before cladding goes up.
- HVAC undersized for Inland Empire heat. Cover’s standard tonnage is spec’d for coastal mild climates. On San Bernardino valley-floor lots that hit 108-115°F, that unit runs non-stop and still can’t hold 78°F. We specify upgraded tonnage and mandate duct-blaster sealing so the unit stays rentable through August.
- Fire-rated assembly gaps on foothill-adjacent parcels. Parcels near the San Bernardino foothills fall in Very High Fire Hazard Severity Zones, triggering Chapter 7A requirements Cover’s stock venting and cladding don’t meet. We retrofit ember-resistant vents, ignition-resistant siding, and fire-rated wall assemblies that coastal Cover projects never need.
- 100-amp electrical service blocking plan check. The 1950s-1970s ranch homes that dominate San Bernardino’s flatlands almost universally have original 100-amp panels and aging galvanized supply lines. The city will not approve a second dwelling unit without a 200-amp upgrade and partial replumb. We build this into the initial quote, not as a mid-project surprise.
- Foundation and utility scope gaps. Cover’s panel package covers the shell, not the site-built foundation or utility connections. On slab-on-grade lots common west of downtown, we engineer the stem wall, coordinate the sewer lateral, and run the new copper water line - all under the same contract, same written price.
Before
AfterCover Service in San Bernardino: What Local Conditions Mean for Your Equipment
San Bernardino’s post-WWII flatland neighborhoods are filled with 1950s-1970s ranch-style homes on 7,000-10,000+ sq ft lots - oversized by California standards - putting most properties well within by-right ADU lot-coverage limits with room to spare. At the same time, the city sits at the center of the Inland Empire’s warehouse and logistics corridor, generating relentless demand from workers priced out of coastal rents. This combination means Cover ADUs here pencil unusually well as rental assets, but only if the building department actually issues the certificate of occupancy.
That’s where the local geometry becomes a constraint. Older flatland blocks, particularly around the Westside and corridors near downtown, often have rear-alley access and deep backyards perfectly suited for detached Cover units. But the original 100-amp main panels on these mid-century homes almost universally require upgrade before San Bernardino’s building department will sign off. We’ve learned to lead every site walk with a flashlight at the main panel. The paperwork is the project. Everything else is just construction.
Cover Models & Products We Service in San Bernardino
We specify and coordinate all four Cover model lines within our single-contract design-build framework:
- Cover Model 1 - studio layout, ~420 sq ft, most common for alley-access lots in the Westside where setback variance is tight
- Cover Model 2 - one-bedroom, ~560 sq ft, our most frequent San Bernardino installation; pairs well with rear-yard placement behind existing detached garages
- Cover Model 3 - two-bedroom, ~740 sq ft, popular with owners targeting logistics-worker rental demand near the I-10/I-215 belt
- Cover Model 4 - two-bedroom plus, ~1,000 sq ft, requires careful lot-coverage verification on smaller flatland parcels but fits comfortably on 8,000+ sq ft lots common north of Base Line
For the shell, we use Cover’s factory panel components and connectors. For HVAC, electrical, and plumbing fixtures, we specify aftermarket equipment rated for Inland Empire conditions - higher-tonnage cooling, ember-resistant venting where required, copper supply lines that outlast galvanized. When a panel or trim piece arrives damaged, we replace the individual component; panelized systems are designed for that, and it keeps the schedule honest.
Cover Service Pricing in San Bernardino
Cover ADU projects in San Bernardino typically run $180,000-$340,000 all-in, drawings through final inspection, for Model 1 through Model 3 installations on flatland lots with straightforward access. Model 4 or hillside parcels with grading requirements push higher. What drives the cost:
- Electrical panel upgrade (100A to 200A): $4,500-$8,500, required on most San Bernardino flatland properties
- Foundation and site prep on slab-on-grade lots: $15,000-$28,000
- Cover shell, freight, and crane set: $95,000-$165,000 depending on model
- HVAC upsize and duct sealing for 115°F design days: $3,500-$6,500 above standard spec
- Fire-rated assemblies and ember-resistant venting for foothill-adjacent parcels: $4,000-$9,000 additional
- Permit set, Title 24 compliance, and city fees: included in our single written price
Every estimate includes a line-item breakdown. Under Haven Standard Clause 1, the price is locked at signing - no door-side upsells, no scope creep. Call (951) 476-1467 for your exact quote; 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 - Cover ADU in San Bernardino
Almost always, yes. San Bernardino’s building department requires adequate electrical service for a second dwelling unit, and the 1950s-1970s ranch homes that dominate our flatland neighborhoods were built with 100-amp panels sized for a single mid-century household. We verify amperage at the first site visit and build the upgrade into your written quote. Call (951) 476-1467 to schedule a free estimate.
Only if the HVAC is upsized from Cover’s coastal standard spec. San Bernardino valley-floor lots regularly hit 108-115°F, and the stock tonnage runs continuously without holding temperature. We specify higher-capacity equipment and require duct-blaster verification before insulation goes in. Call (951) 476-1467 to review the mechanical spec for your lot.
Yes, if the parcel isn’t in a Very High Fire Hazard Severity Zone that triggers additional setback and access requirements. Foothill-adjacent sites need ember-resistant venting, ignition-resistant cladding, and fire-rated assemblies that standard Cover packages don’t include. We engineer these retrofits into the permit set before construction starts. Call (951) 476-1467 to verify your parcel’s fire zone status.
San Bernardino’s by-right ADU rules, aligned with state law, allow most flatland properties to add a detached ADU without a coverage variance. The typical 7,000-10,000+ sq ft ranch lot has ample room for a Cover Model 2 or 3 with required setbacks. We verify exact coverage calculations during the permit set phase. Call (951) 476-1467 for a site-specific assessment.
Yes. The permit set is our core product, not an afterthought. We prepare the full plan set for San Bernardino’s building department, including Title 24 energy compliance, structural calcs for Santa Ana wind loads, and fire-detailing where required. One contract, one written price, one point of accountability. Call (951) 476-1467 to start the permit review.
Service Areas Near San Bernardino
Our crew is active across the Inland Empire corridor. We provide Cover service in Rialto, where we’ve completed projects in the Willow Avenue corridor near City Hall. We also cover Cover service in Fontana and the broader San Bernardino service area including Rancho Cucamonga, Riverside, and Redlands. Every project receives the same written-price guarantee and documented photo record, regardless of jurisdiction.
Book Your Cover Service in San Bernardino Today
Call (951) 476-1467 to schedule your free estimate. A live person answers 24/7. You’ll receive a written, line-item price before any work starts - Haven Standard, Clause 1 - and a 365-Day Done Right Promise backed in writing. We’re an independent Cover sales & service provider, not manufacturer-affiliated, with completed and inspected units across San Bernardino’s flatland ranch neighborhoods.
Written by Nadia Ellery, Principal at Ellery ADU Studio Rialto, serving San Bernardino and the Inland Empire since 2015.