Home Addition Contractor in Covina - Design, Permits and Build Under One Contract

Fast, Reliable Home Addition Contractor Across Covina

Adding square footage to a Covina home usually costs between $180 and $340 per square foot depending on scope, foundation work, and the condition of what’s already behind the walls. That number puts a typical 400-square-foot room addition in the $72,000 to $136,000 range, and a full second-story addition can run $200,000 to $350,000 once structural reinforcement is factored in. We’re Lodgewick ADU Builders, the Home Addition Contractor team that has walked hundreds of Covina ranch homes and knows exactly what the city’s plan check, panel requirements, and summer heat load will do to a project before the first wall comes down. Call (254) 602-5618 for a free, written estimate and we’ll put real numbers in front of you.

Call (254) 602-5618

Why Lodgewick ADU Builders Is Covina’s Preferred Home Addition Contractor Company

Homeowners across Covina call us because we write down the price, the arrival window, and the scope before any work starts. The Kingswell Guarantee is a written promise that includes a defined arrival window, a clean job site every evening, and a written guarantee on every project. If the work isn’t right within 365 days, we come back and make it right. That commitment is on paper, delivered before the first nail goes in.

We know Covina’s housing stock better than most ADU Builders - Covina contractors working the eastern San Gabriel Valley. The majority of homes here are 1952-1975 slab-on-grade ranches with detached garages, stucco exteriors, and original 60- or 100-amp electrical services that almost always need a panel upgrade before an ADU or addition gets signed off. Our crew sees this daily. We quote it upfront, on purpose, so the number that lands in your contract is the number you pay.

Every Lodgewick technician and builder on your property is background-checked and uniformed. You’ll know who’s at your door. And when you call with a question about your build or your guarantee, a live person answers, 24 hours a day, 7 days a week. No voicemail loops, no chatbots. Russ Delmar leads our team, and he holds every estimate and every job to the standard set by The Kingswell Way: say the price before the work, show up in the window given, leave the job site cleaner than found, and put every commitment in writing.

We also keep close working relationships with leading ADU and prefab manufacturers including Abodu, Cover, and Dvele. When a Covina lot suits a factory-built unit better than stick framing, we can spec it, permit it, and install it without a separate middleman. That flexibility matters when you’re trying to balance cost, timeline, and the particular constraints of a 7,000-square-foot lot with a 1960s garage sitting on a usable concrete slab.

Bathroom Addition Contractor in Covina

A Bathroom Addition Contractor in Covina handles what is often the most permit-intensive room in the house: new wet walls, drain lines tying into the existing sewer lateral, exhaust venting, GFCI circuits, and waterproofing that has to pass the city’s own inspection. We add bathrooms to primary suites, convert hallway closets into powder rooms, and build full bathrooms into attached and detached ADUs across Covina. A typical Covina bathroom addition runs $35,000 to $75,000 depending on whether we’re tying into existing plumbing or running new lines through a slab.

Slab Cutting and Drain Work

Covina’s ranch homes sit on slab-on-grade foundations, which means most bathroom additions require cutting the concrete slab to run new drain and supply lines. We scope this in the estimate, not as a surprise later. The city wants a plumbing inspection before we cover anything back up, and we schedule that inspection as part of the job, not as an extra.

Venting and Waterproofing for Covina’s Climate

A bathroom added without proper exhaust venting is a mold risk, especially with the temperature swings Santa Ana wind events bring. We hard-pipe exhaust fans to the exterior and waterproof every wall surface to code. It’s the kind of detail that doesn’t show up in a photo but determines whether the room lasts 30 years or starts smelling like mildew in five.

Bedroom Addition Contractor in Covina

A Bedroom Addition Contractor in Covina typically adds a bedroom as part of a larger suite: a primary bedroom with a new bathroom and closet, or a second bedroom for a growing family inside a converted garage. The framing is relatively straightforward on a slab or over a crawl space. What makes or breaks the project is egress, insulation, and getting the electrical load right. Expect $45,000 to $110,000 for a code-compliant Covina bedroom addition, with the range driven mostly by whether we’re adding onto the existing footprint or reworking a detached garage.

Egress Windows and Code Compliance

Every bedroom in California needs a compliant egress window: the window opening has to meet minimum size and sill-height requirements so a person can exit in a fire. In Covina’s older homes, we regularly cut new window openings in stucco walls to meet that standard. It’s not optional, and we build it into every bedroom addition quote.

Insulation for 100-Degree Summers

Covina sits deep in the San Gabriel Valley, where summer highs routinely reach 100-108°F, a full 15-20 degrees hotter than coastal LA. A bedroom added without proper envelope air-sealing will roast by July. We size insulation and air-sealing for the actual heat load here, and we pair every addition with a properly sized mini-split or ducted unit rather than assuming the existing central system can handle the extra square footage.

Trusted Brands We Service in Covina

We work hands-on with Abodu, Cover, and Dvele prefab ADU systems, matching each to the lot size, setback, and timeline of the Covina homeowner in front of us. James Hardie siding is our default exterior because it holds paint in San Gabriel Valley heat and doesn’t warp like cheaper fiber cement alternatives. When you choose a prefab path, we coordinate directly with the manufacturer, handle the city submittal, and manage the site work so the unit lands on a proper foundation with approved utilities. Call (254) 602-5618 to talk through which system fits your property.

Common Home Addition Contractor Problems We See in Covina Homes

• Shared 60- or 100-amp panels. Nearly every Covina ranch built between 1952 and 1975 has an original electrical service that was sized for a 1960s household, not a modern ADU. The city requires a dedicated service or adequately sized sub-panel before signing off, and homeowners who discover this after demo has started face a five-figure budget hit. We price the panel upgrade in every Covina estimate from the first site visit.
• Cloth-wrapped wiring behind garage walls. We regularly find cloth-insulated conductors spliced into circuits that were never meant to carry today’s loads. The moment we open a wall and find cloth wiring, the scope changes, and we’ll show you a written change order before touching another stud.
• Undersized framing on 60s and 70s garages. Many Covina detached garages were framed as accessory structures, not habitable space. Roof spans that work fine for a parked car often won’t carry the ceiling, insulation, and roofing loads required for living space. We verify framing size and spacing during the inspection, not after the drywall is up.
• Failed slab-edge waterproofing. Covina’s occasional heavy winter rains find every gap where a slab meets a stem wall. Water wicks into framing and rots it from the bottom up. We inspect the slab edge before we commit to a conversion price, and we address drainage at the source.

Pricing for Home Addition Contractor in Covina, CA

We Also Serve Cities Near Covina

Our crews work throughout the eastern San Gabriel Valley. If you’re in Covina, you already know the lots, the ranch housing stock, and the heat. We bring the same written-price approach to Azusa, West Covina, Baldwin Park, and Glendora, where the housing stock and permit realities are often nearly identical. Call (254) 602-5618 from any of these cities and we’ll schedule a site visit the same week.

FAQs About Home Addition Contractor in Covina