Dvele Junior ADU & Interior Conversion Nationwide

Dvele Junior ADU & Interior Conversion in Westchester: What to Know First

We provide independent Dvele Junior ADU and interior conversion services in Westchester, with most projects moving from signed contract to permit submission in 8-12 weeks and construction typically spanning 4-6 months depending on utility complexity. Every project carries a written price before any work begins, per Haven Standard Clause 1, and our 365-Day Done Right Promise applies in writing from day one. This page is for Westchester homeowners who own a Dvele prefab system and need to convert existing interior space - basement, above-garage, attached addition, or room conversion - into a permitted Junior ADU. Call (213) 698-7591 to schedule your free estimate.

Call (213) 698-7591

How Dvele Products Fail - and How We Fix Them

• Dvele V-Series wall panel seal degradation in basement conversions. The V-Series uses a proprietary closed-panel system with integrated air barriers that can shift during Westchester’s seasonal clay-soil expansion, particularly in the older Ladera Heights-adjacent lots with poor drainage grading. We’ve found the factory-applied tape seams at panel joints lose adhesion where humidity cycles exceed 30 percent variance. Our fix: we remove the compromised tape, treat the substrate with a compatible vapor-barrier primer, and reseal with a fluid-applied membrane rated for California Title 24 - then document the repair in the permit set so the inspector sees continuity, not a patch.
• Dvele S-Series floor cassette deflection in above-garage applications. The S-Series light-gauge steel floor system is engineered for ground-bearing loads, but above-garage conversions in Westchester often inherit 1950s garage slabs with insufficient bearing capacity - 3.5 inches where 4 inches is spec minimum. The cassette flexes, finishes crack, owners blame the product. We sister the existing joists with LVLs where the structural calc demands it, spec a floating subfloor assembly to decouple live loads, and submit the revised load path as an addendum to the original Dvele structural letter - keeping the warranty intact where possible, or flagging where it won’t.
• Dvele MEP rough-in conflicts during room-to-ADU conversions. Dvele ships with pre-plumbed and pre-wired chases optimized for their standard module layout. In a Westchester interior conversion, you’re often threading those chases through 1940s lath-and-plaster walls with no correlation to Dvele’s 24-inch grid. We map the existing conditions with a 3D scan, reroute the MEP in the permit set before we touch a wall, and order Dvele’s field-adaptable chase kits - or fabricate compatible transitions in our shop when lead times stretch past permit readiness.
• Dvele window-wall thermal bridging in attached addition ADUs. The Dvele window-wall system uses a thermally broken aluminum frame that performs well in new detached units. In attached additions against existing Westchester stucco, the frame edge often lands inside the thermal envelope without proper end-dam flashing. Condensation forms at the sill, owners see mold in year two. We detail a site-built sill pan with integrated end dams in the permit set, using Dvele’s published frame dimensions but specifying local-compatible materials - never relying on the factory detail alone.
• Dvele smart-home backbone incompatibility with legacy Westchester electrical. Dvele’s HomeOS requires a dedicated 20-amp circuit and Cat 6A home run to the panel. Many Westchester interiors still have split-bus panels from the 1970s with no room for the smart load center. We specify the panel upgrade in the initial scope, coordinate with LADWP on service sizing if the main needs upsizing, and run the low-voltage backbone in separate conduit per NEC 725 - documented in the permit set so the inspector doesn’t flag it as unauthorized low-voltage work.

Our Dvele Junior ADU & Interior Conversion Process

1. 1
   Site survey and Dvele serial verification. We confirm your unit’s production batch, pull the factory structural letter, and identify any field notices Dvele has issued since manufacture - this shapes every decision downstream.
2. 2
   Existing conditions documentation. 3D laser scan of the interior space, utility locate, and photographic record of every surface that will remain. You receive this as a PDF within 48 hours.
3. 3
   Permit set preparation. The permit set comes first. Everything else is a conversation about sequence. We produce a complete drawing package integrating Dvele’s published details with site-specific adaptations, then submit to LADBS West with a cover letter noting the prefab origin and our independent status.
4. 4
   Written price and scope lock. Under Haven Standard Clause 1, you receive a line-item written price before any construction begins. Under Clause 5 (No Surprises), that scope is locked at signing.
5. 5
   Construction and Dvele-specific coordination. Our crews handle the structural adaptation, MEP integration, and finish tie-ins. Where Dvele parts are back-ordered, we specify quality aftermarket equivalents and document the substitution for warranty clarity.
6. 6
   Final inspection and 365-Day Done Right activation. We walk the inspector through the permit set-to-field correlation, pass final, and your written promise takes effect the same day.

What Dvele Junior ADU & Interior Conversion Costs in Westchester

Interior JADU conversions using Dvele systems in Westchester typically run $145,000-$225,000 all-in, drawings through final inspection. Basement ADUs with Dvele wall panels land at $185,000-$275,000 due to moisture management and slab work. Above-garage units with S-Series floor cassettes range $165,000-$240,000, with the variance driven by whether the existing garage structure needs structural augmentation.

What moves the price: foundation condition, electrical panel capacity, distance to sewer lateral, and whether Dvele has issued a field notice affecting your serial range that requires a factory-directed modification. We identify these variables in the first site visit and reflect them in the written quote - no placeholder allowances that balloon later. Call (213) 698-7591 for your exact number; estimates are free.

Why Westchester Homeowners Call Ellery ADU Studio Westchester for Dvele Work

We’ve specified and coordinated Dvele, Abodu, and Cover systems since 2015 - the year California’s ADU laws began shifting. That multi-brand fluency matters when your Dvele unit needs a part that’s on 14-week backorder and we can specify a Cover-compatible transition or a site-built equivalent that keeps your permit timeline intact. Our license number appears on every page, our crews are background-checked and uniformed, and a live person answers calls 24/7 - not a voicemail queue with a callback promise that doesn’t materialize. The 365-Day Done Right Promise is in writing before the project starts, not a handshake after it’s done. Nadia Ellery grew up watching Santa Monica bungalows get subdivided and repurposed; she and our crew have worked extensively across Westchester and Ladera Heights, where lot grades and older utility easements tend to add documentation most owners don’t anticipate until we show them the survey.

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