A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable ADU Builders Across Clovis
Building an ADU in Clovis usually costs between $180,000 and $420,000 for a detached unit, and $85,000 to $190,000 for a converted JADU, depending on size, finishes, and what’s behind your existing walls. Those are real numbers we put in writing before any work starts, not the vague verbal ranges you’ll get from a contractor who disappears after the first call. Benson ADU Fresno serves Clovis homeowners from our Central Valley office, with crews who know the difference between a 2005 tract home off Fowler Avenue and a 1960s ranch near Old Town. We build detached ADUs, JADUs, garage conversions, and prefab units, and every project carries our 365-Day Done Right Promise in writing. Call (559) 206-2363 and a live person answers. That’s the whole point of The Relay Visibility Guarantee.
Why Benson ADU Fresno Is Clovis’s Preferred ADU Builders Company
Clovis homeowners keep telling us the same thing: they’re tired of contractors who quote one number, open a wall, and hand them a change order for double. That’s why Troy Eastman built our process around the opposite. You get a written price before a single tool comes off the truck, and if anything changes once we’re inside the framing, the new number is approved by you in writing before we proceed. No surprises at the door, no scope creep billed after the fact.
Our crews work Clovis week in and week out: Harlan Ranch, Loma Vista, Deauville, and the neighborhoods feeding Buchanan and Clovis West high schools. We know the lot shapes, the setback tendencies on 7,000 to 10,000 sq ft parcels, and which blocks hit fast-track permitting smoothly. Every technician who steps onto your property is background-checked, uniformed, and knows your floor plan by name before arrival. We’re ADU Builders who document the work with before-and-after photos and send your invoice by link, the way you’d expect from every other service you hire from your phone.
We build with brands you can research independently: Abodu, Dvele, Cover, and James Hardie cladding among them. That matters because you shouldn’t have to trust our word alone. You can look up the manufacturer, read their specs, and hold both of us to it. And when the job is done, our 365-Day Done Right Promise means if it isn’t right within a full year, we make it right. In writing. Stamped on the project.
Detached ADU in Clovis
Detached ADU construction in Clovis typically runs $180,000 to $420,000 depending on whether you choose a site-built unit or a prefab panel system from a brand like Abodu or Dvele. Clovis’s 1990s and 2000s tract subdivisions, especially east of Clovis Avenue, have the lot depth to handle a detached unit with a private entrance and a small covered patio, which is exactly what most multigenerational families here want. The permitting path is among the friendliest in the Central Valley, but that doesn’t mean you skip the unknowns. It means you budget for them up front.
Site-Built vs. Prefab Panels
Site-built detached ADUs in Clovis give you full control over layout and roofline, which helps when you’re matching the stucco and tile profile of a 2003 home in a deed-restricted community. Prefab panels speed the framing to a matter of days and reduce waste on your lot. Both routes still require foundation work, utility trenching, and HVAC sized for Clovis summers that routinely cross 100°F.
What the Permit Actually Triggers
When you add a detached unit, Clovis’s building department reviews the whole property, not just the new footprint. That often means upgrading your main panel, re-flashing roof transitions, and bringing the existing house’s egress windows up to code. We write those allowances into your contract before we pull the permit, so when the inspector lists them, the price doesn’t move.
JADU in Clovis
JADU construction in Clovis runs $85,000 to $190,000 and is the fastest way to add a studio or one-bedroom unit to an existing home, typically by converting an attached garage or a bonus room. On a 7,000 sq ft lot near Buchanan High, a JADU is often the smarter play than a detached build because it uses space you already have. The tradeoff is that opening the walls of a 1990s tract home almost always turns up wiring and waterproofing work you didn’t plan for. We plan for it.
Garage Conversions and What Hides in the Walls
On a 1990s tract home near Buchanan High, our crew opened the wall for a JADU and found the original 14-gauge wiring undersized for modern loads plus water-damaged sill plates from a failed stucco weep system. We wrote the permit-triggered code upgrades, AFCI breakers, a new LVL header, full reflash, into the contract allowance, priced the added framing repair in writing, and had it approved before we touched it. That’s how every JADU goes with us. Not a verbal estimate and a shrug later.
In-Law Suite Layouts
Most Clovis JADUs are built for aging parents or adult children, not tenants. That changes the design: a separate entrance, a small kitchenette, wider doorways, and a covered sitting area outside. Privacy matters on these lots, and a JADU with its own entry off the driveway keeps two generations from tripping over each other.
Trusted Brands We Service in Clovis
We build with Abodu, Dvele, Cover, and James Hardie cladding, and we keep replacement parts and panel stock flowing to our Clovis jobs so a prefab install doesn’t stall for a missing connector. If you’ve researched prefab ADU brands and have a preference, tell us. We’d rather build the unit you already trust than talk you into something you’ve never heard of. You can verify every brand we carry, look up their engineering specs, and check their warranty terms yourself. That transparency is the point.
Common ADU Builders Problems We See in Clovis Homes
- Hidden knob-and-tube or aluminum wiring on older homes: Clovis has pockets of 1940s to 1970s construction near Old Town, and opening a wall there can reveal wiring that hasn’t been legal to install in decades. A permit triggers a full upgrade. No allowance in your contract means an ugly surprise at the worst possible time.
- Undersized HVAC that can’t beat Clovis heat: A detached ADU without a properly sized mini-split or cool roof will struggle to hold 80°F inside on a 105°F day. That costs you hundreds in extra PG&E bills every summer. We size every system for the actual square footage and orientation of your unit, not a thumb rule from a cooler climate.
- Failed waterproofing on garage conversions near Old Town Clovis: Smaller lots and tighter setbacks here hide drainage problems until the first winter rain. We see sill plates rotted from stucco weep systems that were never flashed correctly. The fix is re-flashing and drainage correction before drywall goes up, not a patch after the mold appears.
- Lot coverage surprises on tight parcels: Clovis lots east of the freeway can be generous, but older ones near Old Town are tighter. A detached ADU that looked fine on paper can eat into the setback buffer and trigger a variance. We flag that at the estimate stage, while it’s still free to fix on paper.
Pricing for ADU Builders in Clovis, CA
A detached ADU in Clovis runs $180,000 to $420,000. A JADU or garage conversion runs $85,000 to $190,000. A prefab studio from a brand like Boxabl or Cover with a basic finish package tends to sit at the lower end of the detached range; a custom two-bedroom with a full kitchen and covered patio pushes toward the top. What moves the number the most is what’s already inside your walls. A 2005 tract home with a clean panel and modern wiring is a very different job from a 1960s house near Old Town with original everything. We give you a written, line-item price before you commit to anything, and if an allowance gets used, you approve the spend before we spend it. Call (559) 206-2363 and we’ll walk your property and put the real number in your hands. The estimate is free.
We Also Serve Cities Near Clovis
While this page is for Clovis, our crews regularly build ADUs in Clovis and the surrounding Central Valley communities: Fresno, Sanger, Fowler, and Madera. If you’re just over the city line, we’ll still come out, look at your lot, and put the same written price in front of you. No difference in process, no difference in guarantee.
Serving Clovis, CA - Our Local Coverage Area
We’re based in the Clovis 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 Clovis
Expect AFCI breakers on every new circuit, hardwired smoke and CO detection tied to the main house, egress-compliant windows if the JADU is a bedroom, and possibly a panel upgrade if your existing service is under 100 amps. On a 1990s home near Buchanan High, we also found 14-gauge wiring that couldn’t legally carry modern loads and had to be replaced. These aren’t optional upgrades. They’re the minimum code requires once a permitted remodel opens the wall. We write allowances for exactly these items into your contract so the price doesn’t move when the inspector lists them. Call (559) 206-2363 and we’ll tell you what your specific home is likely to need before you spend a dollar.
Because the permit approval is fast, but the code review is thorough. The city will approve your ADU quickly, then the inspector walks through and finds the wiring, waterproofing, or structural issues that have been sitting inside your walls for twenty years. The overrun isn’t the permit. It’s the hidden condition. We prevent it by doing a pre-construction inspection before we quote, then writing allowances for the most common Clovis-specific failures, undersized wiring, rotted sill plates, failed stucco weep systems. Get your written price before the permit application, not after.
Yes, and here’s why: Clovis summers routinely hit 100°F, and a standard dark-shingle roof turns a detached unit into an oven that your mini-split has to fight all afternoon. A cool roof with a high solar reflectance index cuts attic temperatures dramatically and keeps your cooling bill from eating your rental income. We spec cool roof materials on every detached ADU in Clovis unless you have a specific reason not to. The cost difference is modest. The summer PG&E savings are not.
Yes, and this is the most common ADU we build in Clovis. On a 7,000 to 10,000 sq ft lot you have room for a detached unit with its own entrance, a small covered patio, and enough separation that two households live parallel lives on the same property. We position doors and windows so they don’t face your main living areas. The covered patio matters in Clovis because it gives your parents usable outdoor space in every season except the peak of summer. It’s standard on most of our multigenerational builds.
The big one is a failed stucco weep system. On older Clovis homes, water gets behind the stucco and rots the sill plates at the base of the wall, which you only see when the interior framing is exposed. We also find slab edges that weren’t stepped down for drainage, so the first winter rain sends water toward the new living space instead of away from it. Fixing these before drywall goes up costs a few thousand dollars. Fixing them after mold spreads costs far more. We flash, we re-grade, and we document it with photos so you can see exactly what was done.
Ready for a real number? Call (559) 206-2363 and we’ll walk your Clovis property, open your walls if needed, and put the written price in your hands before you commit. That’s the Benson ADU Fresno way, and it’s been backed by The Relay Visibility Guarantee since day one.
Written by Troy Eastman, Owner at Benson ADU Fresno, serving Clovis and the Central Valley.
