Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable Home Additions & ADU Across Soledad
If you’re reading this, you’ve probably hit the wall we hear about most often in Soledad: the house still works, but the space doesn’t. Maybe an aging parent moved in, a grown child came back, or you’re tired of the kids sharing a room off Highway 146 on the east side. Adding square footage or building an ADU in Soledad is the most practical answer for most families here, and the market cost for that work typically lands between $45,000 and $130,000 depending on scope. Call us at (877) 610-1318 and we’ll walk your property, listen to what you actually need, and give you a written line-item estimate before anything gets signed.
Why Barrett & Sons Construction Is Soledad’s Preferred Home Additions & ADU Company
We’re a construction company, not a franchise. Tom Barrett started this business in 1998 and his sons run the crews, which means the name on the truck is the name that shows up at your door in Soledad. You’ll see Tom or one of his sons on-site most days, not a rotating cast of subcontractors nobody knows. When you call, a live person answers, day or night. Not a voicemail box, not an out-of-state call center.
Local reputation here is built one block at a time. We’ve done work near the Mission Nuestra Señora de la Soledad neighborhoods, up around Front Street, and through the newer workforce housing sections that ring the 93960 zip code. Our customers in Soledad tend to ask the same questions: will you pull permits, will the price change, and will you answer the phone if something’s wrong later. The answer is yes, no surprises, and yes, the phone rings in our office.
Every job we do in Soledad includes permits pulled and inspections signed. That’s not a selling point to us; it’s the baseline. Tom publishes his name, his address, and his license number so you can look it up before you sign anything. The permit inspector works for you, not for us, and we like it that way. If a contractor ever tells you permits are optional for your addition or ADU, call someone else, because permits are how you know the work was done to code and will pass when you go to sell.
We also offer a Free Second Opinion on Any Written Estimate, which homeowners around Soledad have used more than once when a national outfit quoted one number on the phone and showed up with a different bill at the door. Bring us that estimate and we’ll read it line by line with you. There’s no trip charge inside Monterey County.
Our Home Additions & ADU Services in Soledad
Here’s what we handle across Soledad, from the older mid-century homes near downtown to the 2000s-era builds on the north side:
ADU Design & Permitting
An ADU in Soledad follows California state law, but local plan check can take longer than people expect, especially for detached units on the clay-rich soils south of town. We handle the design, the engineering, the submittals, and the resubmittals. You get one name to call instead of chasing a designer, an engineer, and the city on your own. Our process starts with a walk of your lot to see what’s actually feasible under current setback and height rules for the 93960 area.

Garage Conversion ADU
If your garage on a mid-century Soledad home has seen better days and the car lives in the driveway anyway, converting it into a rental or in-law unit is the fastest path. These run roughly $30,000 to $80,000 depending on plumbing runs and existing slab condition. The thing we check first is the foundation, because many existing slabs in Soledad predate the moisture-barrier and compaction standards we use now, and the last thing you want is an ADU floor cracking its tile two winters in.

New Detached ADU
A ground-up detached ADU in Soledad typically falls between $90,000 and $220,000. That’s a wide spread because site prep is the wild card. The irrigated, clay-heavy soils that dominate the valley floor here swell in the wet season and shrink through the summer, which means foundation engineering isn’t a line item to skip. We bring in geotechnical review when the lot warrants it, and we write every allowance down on paper before breaking ground.

Junior ADU & Interior Conversion
A Junior ADU, or JADU, is usually a converted bedroom or attached space with its own entrance and a small kitchenette. These are the most affordable way to add a rental unit or private space for a caregiver, often landing in the same ballpark as a small interior remodel. We’ll walk you through what Soledad’s building department requires for a JADU versus a full ADU, because the distinction changes the permit path and your property tax picture. We also handle related Kitchen Remodeling in Soledad if your conversion needs a compact kitchen and Bathroom Remodeling in Soledad for the attached bath.

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 Soledad
We don’t install mystery materials off a van. When your Soledad addition or ADU calls for hardscape or patio work, we source from brands you can look up, like Techo-Bloc and Cambridge Pavers. For concrete flatwork and foundation prep, we work with Quikrete and Oldcastle products. Every brand choice goes into the written scope before work starts, so you know exactly what’s being installed and what it should look like. No generic substitutions, no “comparable quality” language.
Common Home Additions & ADU Problems We See in Soledad Homes
- Framing and roofing that underestimate the wind. Soledad sits in the narrowing southern end of the Salinas Valley wind corridor. Those afternoon northwest winds pick up speed as they funnel south, and we regularly inspect additions and ADU roofs where fasteners have been worked loose or uplift was never properly engineered. A project 20 miles east in King City or north in Gonzales simply doesn’t see the same sustained gusts.
- Slab cracks and foundation heaving from expansive clay soils. The irrigated agricultural soils under much of Soledad are clay-rich and expansive. They swell with winter rain and irrigation seepage, then shrink and crack through the dry summer. Any slab or foundation poured without engineered moisture barriers and proper compaction will move, and we’ve seen homes where cracks run wall to floor in two seasons flat.
- Deferred maintenance on mid-century homes. The older core of Soledad has a lot of 1950s-through-1970s single-family stock, and many of those homes never got the updates that newer builds enjoy. When you’re adding square footage, that often means retrofitting the existing wiring, plumbing, and even the roofline before the new framing ties in cleanly.
- Permit histories that aren’t what sellers claimed. We’ve walked additions in Soledad that were built without permits by a previous owner’s cousin. The city has no record, the electrical was never signed off, and now you want to add an ADU on top of it. We sort that out before any new work starts, because the inspector will find it eventually anyway.
Pricing for Home Additions & ADU in Soledad, CA
Here are the numbers we quote most often for Soledad homeowners:
- Home Addition: $45,000 to $130,000
- ADU Construction: $90,000 to $220,000
- Garage Conversion: $30,000 to $80,000
- Junior ADU / Interior Conversion: generally aligns with a small remodel, often $30,000 to $80,000 depending on plumbing and kitchenette scope
What moves your number: site prep on clay soils, foundation type, wind-rated framing and roofing, utility trenching from the street, and whether the existing structure needs retrofit work before the new space ties in. What doesn’t move your number once we write it down: everything. Every scope, every allowance, every change order arrives in writing before work proceeds. No surprise invoices at the end. Call (877) 610-1318 for a free estimate, and while you’re at it, check out our Home Additions & ADU team’s full service list.
We Also Serve Cities Near Soledad
In addition to our Home Additions & ADU in Soledad work, we take projects in Gonzales, Salinas, Seaside, and Hollister. If your property sits on the edge of town or you own a home a few exits up the 101, call us and we’ll confirm coverage before you make the drive. (877) 610-1318.
Serving Soledad, CA - Our Local Coverage Area
We’re based in the Soledad 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 Soledad
We schedule estimate visits in Soledad within a few business days of your call, and we don’t charge a trip fee inside Monterey County. There’s no obligation with the estimate, and you’ll get your numbers in writing before we leave. Call (877) 610-1318 to set up a walkthrough.
Yes. We cover the full 93960 zip code, from the older streets near Mission Soledad and downtown, up through Front Street, and out to the newer subdivisions on the north and east sides. If you’re not sure whether your street is in our coverage area, call us and we’ll tell you straight.
A detached ADU in Soledad typically runs $90,000 to $220,000. That’s broadly in line with the rest of the Salinas Valley, but soil and wind conditions here can add foundation and framing costs that flatter, sandier lots in other towns might not face. We’ll explain exactly what your specific lot needs before we write the estimate. Call (877) 610-1318 and we’ll walk it with you.
Only if the scope changes, and only in writing. We issue a written change order before any adjustment happens, and you see the revised number before a nail moves. That’s how Tom has run Barrett & Sons Construction since 1998, and it’s why we say an allowance that isn’t on paper is a surprise waiting for a date.
Every completed job is backed by our 90-Day Done Right Promise. It’s written on the contract, not buried in fine print, and if anything’s not right, Tom comes back and makes it right, one call. For the bigger structural picture, the permit inspections themselves are your downstream protection, because the city keeps the records and the work passes before you pay the final draw.
Looking for an honest number on a home addition or ADU in Soledad? Call Barrett & Sons Construction at (877) 610-1318 and schedule your free estimate. We’ll give you a straight answer, a written line-item number, and a name you’ll see around town.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Soledad and surrounding Monterey County communities.







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