Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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AfterFast, Reliable Home Additions & ADU Across Clovis
Adding space to a Clovis home usually costs between $45,000 and $130,000 for a room addition, and $90,000 to $220,000 for a new detached ADU. Those are the real numbers we quote on paper before any work starts. If you’re in 93611, 93612, 93613, or 93619 and you’re weighing a second story against a backyard unit, call (877) 610-1318 and we’ll walk the lot with you, check the soils, pull the county records, and put every allowance and every change in writing. Tom Barrett has run Home Additions & ADU crews since 1998, and his sons run most of them now.
Why Barrett & Sons Construction Is Clovis’s Preferred Home Additions & ADU Company
We’ve built additions and ADUs all over Clovis – from 1970s ranch homes near Old Town with slab foundations that have seen five decades of valley heat, to brand-new master-planned subdivisions off DeWitt Avenue where the HOA has more rules than the city. Tom Barrett’s name, address, and license number are published. Look them up before you sign anything; we’d rather you did.
Every job we take in Clovis gets permits pulled and inspections signed. No exceptions. The permit inspector works for you, not for me – that’s why I like him. And every scope change, every allowance adjustment, every material substitution arrives as a written change order before a nail moves. That’s not a sales pitch. It’s how we’ve stayed in business in the Central Valley for over 29 years while national outfits cycle through new trucks and angry Yelp pages.
When you call Clovis projects in, a live person answers. Not a voicemail box, not an out-of-state call center. You’ll get a straight answer about scheduling from the Fresno office, and a crew that shows up background-checked and in uniform with the Barrett & Sons name on their shirts.
Our Home Additions & ADU Services in Clovis
ADU Design & Permitting
This is where Clovis projects either start clean or start bleeding money. We handle the full design and permit package – county submittal, HOA architectural review when it applies, Title 24 energy compliance, and structural calcs for the specific soils under your lot. In Clovis, that second layer of HOA review in communities like those along Shepherd Avenue can reject a roofline pitch or an exterior finish that the city already approved, which is why our Roofing in Clovis service includes HOA pre-checks. We manage both layers before you spend a dollar on lumber.
Garage Conversion ADU
Converting an attached garage in central Clovis runs $30,000 to $80,000 depending on how much of the existing slab and framing we can reuse. In 93611 and 93612, many of those 1970s and 1980s ranch homes have slabs that have moved over decades of expansive clay cycles. We check the slab before we quote. If it’s cracked beyond tolerance, we’re honest about what a proper re-pour costs instead of hiding it in a change order later.
New Detached ADU
A freestanding unit is the best fit for the half-acre and acre lots that push east into 93619. You get separation, privacy, and a rentable unit that doesn’t share a wall with the main house. Budget $90,000 to $220,000 for a properly permitted, energy-compliant build in Clovis. That range reflects what we actually see on the ground here – not a national average from a franchise calculator.
Junior ADU & Interior Conversion
If you have an underused bedroom wing, a formal dining room that gathers dust, or attic space that could become a small self-contained suite, a junior ADU is the least expensive legal path to extra living area. These Bathroom Remodeling in Clovis and ADU projects often come down to egress windows, a small kitchenette, and a separate entrance. We scope every line item in writing before the first material order.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Clovis
We install and stand behind products you can look up. On Clovis ADUs and additions, that means Simonton windows on most units, Ply Gem siding and trim where the HOA requires a specific exterior profile, and PGT impact-rated Windows & Doors - Clovis on exposed western elevations that take the full San Joaquin Valley afternoon sun. We don’t stock mystery brands off a van. If the HOA spec calls for a particular window line, we quote it by name and we install it by name.
Common Home Additions & ADU Problems We See in Clovis Homes
- Expansive adobe clay under 93611 and 93612 slabs. Decades of wet-winter, hot-summer cycling moves these slabs. A new addition tied into an older foundation needs a structural engineer who knows Clovis soils, not a standard detail from a flatwork book.
- HOA architectural specs that override city code. In master-planned communities off Clovis Avenue and Shepherd Avenue, roof pitch, exterior finish, window style, and even garage door color get reviewed. Miss one spec and the permit stalls. We pull HOA docs before we draw anything.
- Septic and well setbacks on 93619 lots. County health rules dictate where an ADU can sit relative to the leach field and the wellhead. On a half-acre lot, that can push your unit 40 feet from where you wanted it. We survey and verify setbacks before the foundation plan exists.
- Decomposed granite under the topsoil. East of Clovis proper, soil can change from clay to granite within a single block. Standard flatwork specs won’t cut it. We bring in a geotech report early so the foundation is engineered right the first time.
Pricing for Home Additions & ADU in Clovis, CA
Here’s the honest price table we quote for Clovis work. These are not national ranges – they’re what we’ve written on contracts for this area over the past several years:
| Project | Typical Range in Clovis |
|---|---|
| Room Addition | $45,000 - $130,000 |
| New Detached ADU | $90,000 - $220,000 |
| Garage Conversion ADU | $30,000 - $80,000 |
What pushes a Clovis job toward the top of those ranges? HOA-mandated exterior finishes, soils that need post-tension slabs or deep grade beams, long material hauls to 93619 foothill sites, and septic or well setbacks that force a more expensive foundation shape. What pushes it down? A simple slab on stable valley-floor clay in 93612, a standard roof pitch, and city-only permitting with no HOA layer. We price all of this before you sign. Call (877) 610-1318 for a free estimate with every allowance and every assumption on paper.
We Also Serve Cities Near Clovis
Our crews live and work throughout the Central Valley. Beyond Home Additions & ADU in Clovis, we’re on job sites in Fresno, Old Fig Garden, Sanger, and Fowler most weeks of the year. Clovis jobs are scheduled from our Fresno office, and response times to all four of those neighboring communities are measured in days, not weeks.
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 - Home Additions & ADU in Clovis
If your Clovis property sits inside city limits, you file with the City of Clovis building department. If you’re in a county island – common in parts of 93619 as you move east toward the foothills – Fresno County handles the permit. Some additions in master-planned communities also need HOA architectural approval on top of the building permit. We figure out which authority applies to your exact parcel before we draw plans, so you don’t file with the wrong agency and lose six weeks. Call (877) 610-1318 and we’ll look up your parcel’s jurisdiction while you’re on the phone.
In communities like those off Clovis Avenue and Shepherd Avenue in 93619, HOAs commonly impose roof pitch minimums, exterior finish requirements, window style standards, and even specific garage door colors. These are additional to city code, and they must be approved before the city will accept your permit in some cases. We request the HOA’s architectural guidelines during our first site visit and quote against them. Skip that step and your ADU permit gets rejected out of the gate. For our clients, we treat the HOA packet as part of the permit package, not an afterthought.
Sloped lots east of Clovis require grading, retaining walls, deeper footings, and more complex drainage than the flat ranch lots in central Clovis. On top of that, 93619 soils often contain decomposed granite and expansive clay layers that force post-tension slabs or extra-deep perimeter grade beams. A flat lot in 93611 can often use a standard monolithic slab. That engineering and excavation difference alone can add tens of thousands to the foundation cost. We quote both scenarios as line items, not as a vague “site work” lump sum.
Yes, in most cases, but the county health department has mandatory setbacks between an ADU and your septic leach field, wellhead, and any propane tank. In 93619, where many properties rely on private water and septic, those setbacks can shift the buildable envelope significantly. On a half-acre lot off Shepherd Avenue, our crew had to move a 600-sq-ft ADU foundation 40 feet from the original stake because of septic and well setbacks. We verify those distances during the site survey, before the foundation plan exists, so you don’t discover the problem at permit review. Call (877) 610-1318 and we’ll check the setback map for your property.
Central Clovis homes in 93611 and 93612 sit on expansive adobe clay that swells when wet and shrinks during the valley’s 100°F-plus summers. Additions tied to those older slabs often need post-tension slabs, deeper perimeter grade beams, or an engineered separation joint to control differential movement. In 93619, that clay can transition to decomposed granite within a single block, and engineers routinely spec post-tension work for both soil types. We bring in a licensed geotech early on every addition and ADU in Clovis – the report costs a few thousand dollars and routinely saves tens of thousands in foundation rework. If you want an exact quote for your lot, call (877) 610-1318 for a free estimate.
Get a Written Quote for Your Clovis Home Addition or ADU
Building a room addition or ADU in Clovis means navigating county permitting, HOA specs, shifting soils, and septic setbacks – and most contractors won’t tell you any of that until after you’ve signed. We put it all in writing before the contract. Call (877) 610-1318 and Tom Barrett or one of his sons will come out, walk the lot, check the soils, pull the HOA packet, and hand you a line-by-line quote with every allowance, every assumption, and every price change already documented. Free estimate. No trip charge inside the county. And if it’s not done right, the 90-Day Done Right Promise is on the contract – one call brings Tom back.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Clovis and the Central Valley since 1998.