A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Mentone, CA
Adding an ADU, home addition, or room addition in Mentone means working with smaller foothill lots, older housing stock, and a planning process shaped by San Bernardino County. We’re Sutton ADU Builders, and we handle all three here with one approach: a written price before work begins, a crew you can identify by name and photo before they arrive, and a 365-Day Done Right Promise on the finished project. Call (472) 248-8213 to talk through your lot and what’s possible.
Why Mentone Homes Are Different
Mentone sits between Redlands and Yucaipa along the Mill Creek corridor, and the housing stock reflects that geography. Many homes here were built between the 1950s and 1980s, which means detached garages with shallow footings, bedrooms that never anticipated an aging parent or adult child moving in, and side yards that slope gently toward the wash. ADU and addition work in Mentone is rarely a flat-lot exercise. We regularly design around the older parcel shapes south of Mentone Boulevard and the larger, flatter lots up toward Highway 38.
The climate matters too. Mentone gets real heat in summer, and a poorly planned ADU will bake if the windows face west without shade. We talk about orientation early, because a prefab unit placed wrong costs more to cool for the next thirty years. The planning path runs through San Bernardino County, and Mentone’s unincorporated status means setback and lot-coverage rules follow county standards rather than a city overlay. That changes how much of a rear yard you can realistically use.
Our Main Mentone Services
Mentone homeowners call us most often about two things: adding square footage to an existing home, and building a separate ADU in the backyard. Below is how each works here.
Home Addition Contractor in Mentone
A home addition in Mentone usually means extending off the back of a ranch-style home or building out over a concrete patio that wasn’t engineered for load. We check existing footings first, because many 1960s and 1970s slabs in this area weren’t poured deep enough to support new living space. If you’re weighing an addition against a separate ADU, see our Home Addition Contractor in Mentone page.
ADU Builders in Mentone
A detached ADU in Mentone is often the smarter path when the main house sits close to the property line and a side addition would violate setbacks. We work with prefab brands like Abodu, Cover, and Dvele, and we also do site-built units. The lot access question matters here more than most places, since many Mentone backyards are reached through narrow side gates. Our ADU Builders in Mentone page covers sizing, site work, and county requirements in detail.
Room Addition Contractor in Mentone
A room addition in Mentone typically means one new ground-floor bedroom or a family room bump-out, not a full second story. Many homeowners choose this when a parent moves in or a home office outgrows the front bedroom. Because single rooms often ride on the existing roofline, the cost stays lower, but the same foundation checks apply. See our Room Addition Contractor in Mentone page for room-specific pricing and the process.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Mentone
We’re experienced with leading ADU and exterior brands, including James Hardie cladding systems, Abodu, Cover, and Dvele. That matters when a homeowner wants honest guidance on which product actually fits their Mentone lot and budget. Visit our brands page for the full breakdown.
Pricing for ADU Company in Mentone, CA
| Service | Typical range in Mentone |
|---|---|
| Detached ADU (400 – 600 sq ft) | $180,000 – $320,000 before site work |
| Detached ADU (600 – 1,000 sq ft) | $280,000 – $480,000 before site work |
| Garage conversion ADU | $140,000 – $250,000 |
| Prefab ADU (Abodu, Cover, Dvele) | $160,000 – $300,000 installed |
| Site work, utilities, and foundation for ADU | $40,000 – $95,000 |
| Home addition (single room, 200 – 300 sq ft) | $120,000 – $220,000 |
| Home addition (multi-room, 400 – 800 sq ft) | $220,000 – $450,000 |
| Room addition (one room, 150 – 250 sq ft) | $100,000 – $190,000 |
| Permit fees and county plan check | $8,000 – $25,000 |
| James Hardie exterior cladding (per project) | $15,000 – $45,000 |
What pushes prices up in Mentone is usually site access: a narrow side gate that requires a compact excavator instead of a full-size one, or older sewer lines that need relocation before a slab can go in. Every project gets a written line-item price before we start, so the number you approve is the number you pay.
Neighborhoods We Serve in Mentone
We work across all of Mentone, from the older blocks near Mentone Boulevard and Crafton Avenue to the larger parcels in the north end of town and the homes off Highway 38. Our scheduling is coordinated through the Inland Empire office, with crews dispatched locally.
- Mentone Boulevard corridor
- Crafton Avenue area
- North Mentone (off Highway 38)
- Mill Creek Road area
- East Mentone toward Yucaipa
Most estimate visits in Mentone can be scheduled within a few business days, depending on current workload.
Service Area – Cities Near Mentone
While this page covers Mentone, our crews also work regularly in the surrounding communities. If you’re a few minutes outside town, we likely serve your area too: Redlands, CA, Yucaipa, CA, Highland, CA, and Calimesa, CA.
Serving Mentone, CA - Our Local Coverage Area
We’re based in the Mentone 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 Company in Mentone
Yes. Most Mentone estimate visits land within a few business days of your call. We coordinate scheduling through our Inland Empire office, which keeps drive times short for the whole Mentone and Redlands corridor. Call (472) 248-8213 to get on the calendar.
Yes, we pull all required San Bernardino County permits and manage the plan-check process. Mentone is unincorporated, so setbacks and lot-coverage rules follow county standards, and we design to those from the first site visit. The permit line item is included in your written price.
No, not unless you ask us to change the scope. The price we hand you before any work begins is a fixed, line-item number. If site conditions reveal something unexpected, we show you the issue, explain the options, and get your written approval before spending another dollar.
If you’re considering an ADU, home addition, or room addition in Mentone, call (472) 248-8213 for a free estimate. We’ll walk your lot with you, answer the questions that matter for your specific parcel, and hand you a written price before you commit to anything.
What happens when you call
- 1A real person answersNo phone trees - talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Mentone Customers Say
"Insulated the walls and ceiling properly. It stays comfortable even in July."
- Tamika W."They handled the drawings and the permit paperwork for us. All I had to do was pick the finishes."
- Rosa M."Every crew member was vetted and carried a badge, which matters when they are around your family for months. Tidy site every day."
- Daniel F.
