Fast, Reliable ADU Builders Across Covina
ADU construction in Covina typically runs $180,000 – $420,000 for a detached unit and $120,000 – $220,000 for a garage conversion, with most projects taking 6 – 14 months from first design meeting to final inspection. The single most common mid-project surprise we see on Covina garage conversions is the shared 60- or 100-amp panel: the city requires a dedicated electrical service or adequately sized sub-panel for the ADU before sign-off, and homeowners routinely discover this only after demo has started. We’re the ADU company of the Kingswell family, and we put every commitment in writing before a single nail is driven. Call (254) 602-5618 for a free estimate and a real number, not a guess.
Why Lodgewick ADU Builders Is Covina’s Preferred ADU Builders Company
We know Covina’s housing stock because we’ve walked it: single-story ranch homes from the 1950s through the 1970s, slab-on-grade foundations, stucco exteriors, and detached two-car garages that were practically made for California’s streamlined garage-conversion ADU statutes. Our crews have converted garages off Citrus Avenue, Badillo Street, and neighborhoods across the 91722 and 91723 zip codes. Russ Delmar leads our Covina projects, and he’s the person homeowners talk to when they want a straight answer about scope, cost, or what the city will actually require. We don’t route calls to a call center. A live person answers every call, 24 hours a day.
Homeowners who’ve been burned before come to us because The Kingswell Guarantee is specific: a written price before any work starts, a defined arrival window, a clean job site, and a written guarantee on every project. If the work isn’t right within 365 days, we come back and make it right. That’s in writing, not in a sales pitch. Every ADU Builders project we take on in Covina gets that same guarantee, and it’s delivered before the first permit is pulled.
ADU Contractor in Covina
An ADU Contractor in Covina handles the full build from permit drawings through final inspection, and in this city that means working with Covina’s own building department rather than LA County DPW, which gives homeowners a more direct, in-house permit review path. We act as the general contractor on your ADU: pulling permits, scheduling inspections, managing the electrical panel upgrade, coordinating the stucco match, and handling the certificate of occupancy. A full detached ADU in Covina typically runs $180,000 – $420,000, while a garage conversion on the same lot usually lands between $120,000 and $220,000. We provide that written price before any work starts, always, on every project.
Permit and Panel Scope
Before we frame a wall, we check the service panel. Covina’s in-house reviewers require a dedicated electrical service or right-sized sub-panel for the ADU, and 1950s – 1975 Covina garages almost never have that. We build the panel upgrade into the estimate from the first site visit so nobody finds out after drywall is hung.
Full Build Management
We coordinate every trade: foundation, framing, electrical, plumbing, HVAC, drywall, stucco, roofing. Our crews are background-checked and uniformed, so you always know who’s on your property. Russ Delmar walks each Covina job personally at framing and again at pre-drywall, because that’s when the issues show themselves.
ADU Design in Covina
ADU Design in Covina starts with the lot, not a catalog. The dominant stock is single-story, slab-on-grade ranch homes built between roughly 1952 and 1975, with detached garages, stucco exteriors, and original 60- to 100-amp electrical services. Our design work accounts for Covina’s climate realities from day one: summer highs that routinely reach 100 – 108°F mean a dedicated mini-split system is a code-practical necessity for any habitable ADU, not an upgrade. A smaller pocket of pre-WWII Craftsman and bungalow homes near the older Citrus Avenue corridor may involve pier-and-beam foundations or aging galvanized supply lines that add complexity and cost to any ADU conversion.
Lot-Fit and Setback Planning
Covina lots average 7,000 – 9,000 square feet, which is generous for a detached ADU, but setbacks, utility easements, and the existing garage placement shape what’s actually buildable. We measure, survey, and design to the lot, not to a brochure.
Energy Design for Inland Heat
A Covina ADU without proper air-sealing will fight the Santa Ana wind-driven temperature swings and 100°F summers every afternoon. We specify building-envelope air-sealing, UV-rated line-set wrap, and dedicated mini-split sizing from the first design pass, because retrofitting these after the fact costs more than doing them right the first time.
Trusted Brands We Service in Covina
We work hands-on with leading ADU brands and materials matched to each Covina lot, budget, and timeline. Cover and Dvele are two we specify often for Covina’s ranch lots, because their panelized systems move fast through Covina’s in-house review and handle inland heat well. Boxabl is another we install for homeowners who want a compact, code-ready detached unit without a long framing schedule. We keep local parts and material availability in mind for Covina customers, and when a brand’s lead time slips, we adjust the schedule before it becomes your problem.
Common ADU Builders Problems We See in Covina Homes
- The shared garage panel caught at city review. Reusing the shared 60- or 100-amp garage panel and failing Covina’s pre-sign-off electrical inspection after drywall is already hung. We build the sub-panel or dedicated service into the estimate from the first site visit.
- Cheap fasteners on the ADU roof. Specifying standard zinc or electroplated fasteners where periodic Santa Ana wind-driven dust and temperature swings accelerate corrosion on exposed flashings. We specify stainless or hot-dip galvanized hardware on every Covina ADU roof.
- Coastal air-sealing assumptions. Framing the garage conversion to coastal LA assumptions, thin air-sealing and no dedicated mini-split, then fighting 100 – 108°F Covina summer cooling loads in a small detached unit. We design for inland heat from the first pass.
- Galvanized supply lines on pre-WWII bungalows. Homes near the older Citrus Avenue corridor often still have aging galvanized supply lines and pier-and-beam foundations. We inspect for these before estimating, because replacing a failed line after the ADU is built costs thousands more.
Pricing for ADU Builders in Covina, CA
Detached ADUs in Covina run $180,000 – $420,000 depending on size, finishes, and whether you choose a panelized brand like Cover or Boxabl versus a custom stick-build. Garage conversions of Covina’s 1950s – 1970s detached two-car garages run $120,000 – $220,000, with the panel upgrade, stucco match, and mini-split system built into our written price. A Junior ADU or Studio ADU inside the existing home’s footprint runs $80,000 – $150,000. Covina’s in-house building department review moves faster than LA County DPW, but the panel upgrade and air-sealing requirements don’t go away. We give you a written line-item price before work starts. Call (254) 602-5618 to schedule your free estimate.
We Also Serve Cities Near Covina
Our crews serve Azusa, West Covina, Baldwin Park, and Glendora alongside ADU Builders in Covina. If you’re in a neighboring city and wondering about your own garage conversion or ADU build, we bring the same written guarantee and the same straight answers. Dispatch and scheduling are coordinated from the brand’s Los Angeles office; crews serve Covina locally.
Serving Covina, CA - Our Local Coverage Area
We’re based in the Covina 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 About ADU Builders in Covina
Yes. Covina operates its own city building department, so your garage-conversion ADU goes through Covina’s in-house review rather than routing through LA County DPW. The path is more direct, and we’ve found the reviewers consistent and specific about electrical panel capacity and air-sealing. Call (254) 602-5618 for an exact read on your project, and we’ll walk the city’s requirements with you before you pay a permit fee.
Because Covina’s building department requires a dedicated electrical service or adequately sized sub-panel for the ADU before sign-off, and a 1950s ranch garage almost never has the 60- or 100-amp capacity to carry both the main house and a new habitable unit. The panel upgrade is a scope item many owners only discover after demo, which is why we build it into every Covina estimate from the first site visit. Call (254) 602-5618 and we’ll tell you what your panel needs before you spend a dollar on demo.
You really need a dedicated mini-split. Covina sits deep in the eastern San Gabriel Valley, where summer highs routinely reach 100 – 108°F, a full 15 – 20 degrees hotter than coastal LA, and a window unit will not hold a habitable small detached unit at a reasonable temperature without running constantly. A mini-split is also what the city expects to see for a permitted ADU. Call (254) 602-5618 for a size-specific recommendation and a written price.
Those older Craftsman and bungalow homes often sit on pier-and-beam foundations and may still have aging galvanized supply lines, so we inspect the foundation, the supply plumbing, and the electrical service before we estimate anything. The garage slab is usually sound, but the shared 60-amp panel almost never is. We handle the inspection and the remediation as part of the written price. Call (254) 602-5618 and we’ll start with a site walk.
Yes, and Covina’s housing stock is almost purpose-built for it: permanent concrete slabs and wood-framed walls on detached two-car garages mean the structural bones are already there, which keeps the conversion faster and less expensive than a ground-up build. The panel upgrade, air-sealing, and mini-split add real cost, but a garage conversion still runs $120,000 – $220,000 rather than the $180,000 – $420,000 of a detached new build. Call (254) 602-5618 for a free estimate and we’ll give you a written line-item price before any work starts.
Written by Russ Delmar, Owner at Lodgewick ADU Builders, serving Covina since 2010.