ADU Company in Rialto, CA
An ADU in Rialto – a separate small home built on your existing lot, also called an accessory dwelling unit – usually makes far more sense here than in most Inland Empire cities, because Rialto’s older tract lots run deep. We’re Lodgewick ADU Builders, the ADU company of the Kingswell family. We build ADUs, convert garages, and add rooms across Rialto, and the work we quote here differs from Fontana or Bloomington because of what sits under and around these 1950s – 1980s homes. If you’re wondering whether your Rialto lot can hold an ADU, call (254) 602-5618 and we’ll walk through it with you.
Why Rialto Homes Are Different
Rialto’s residential neighborhoods were carved from citrus groves and farm parcels, and that history still shapes every build we price here. The typical single-family lot runs 7,000 – 12,000 square feet, and rear yards often stretch 120 – 150 feet deep. That’s a real advantage: a detached ADU with proper setbacks fits on lots where neighbors in Fontana or Grand Terrace struggle to clear the same requirements. But the same age that created those deep lots created problems. Electrical panels in these homes are frequently 100-amp originals, which won’t carry an ADU plus the main house without an upgrade. Sewer laterals on older blocks often lack the cleanout access Rialto now requires before a second unit gets approved. And the valley heat – summers regularly hit 105 – 110°F with no ocean breeze to soften it – puts Rialto in a demanding Title 24 climate zone where insulation and cool-roof specs are stricter than what a coastal contractor would ever quote. None of this makes a Rialto ADU a bad idea. It makes a Rialto ADU a job you want priced by someone who already knows these streets.
Our Main Rialto Services
Homeowners in Rialto call us most often about three things: adding square footage to the house they already have, turning a garage into livable space, and building a freestanding ADU in the back yard. Each has its own Rialto page below.
Home Addition Contractor in Rialto
A home addition in Rialto means expanding the footprint of the house you already live in – a new bedroom wing, a larger kitchen, a family room that actually fits everyone. On these 1950s – 1980s tract homes, the structural question is usually the roof line and whether the existing slab can carry the new load. Rialto’s extreme summer heat also drives the HVAC work: the added square footage changes the load calculation, and Title 24 doesn’t give coastal shortcuts. We quote the full job in writing before anything starts, including the panel and sewer work these older homes often need. See Home Addition Contractor in Rialto for the full breakdown.
Garage Conversion Contractor in Rialto
A garage conversion turns an attached or detached garage into a bedroom, studio, or rental unit. In central and north Rialto, the alley-facing detached garages from the 1960s look like obvious targets, but we’ve cored enough of them to know the slab story: many were poured at 2.5 inches over uncompacted fill, which means the slab usually gets replaced, not just covered. Out-of-area contractors quote the job assuming the slab is fine, then hit you with a change order. We core first and price the real job up front. Details on our Garage Conversion Contractor in Rialto page.
ADU Builders in Rialto
A detached ADU – a lodge-sized home on your existing lot, which is exactly what the word means: a small house on a larger property – is the build Rialto’s deep lots make possible. The 120 – 150 foot rear yards in these postwar tracts routinely clear setback requirements that strangle ADUs in neighboring cities, and the timing works: warehouse and logistics workers are pouring into the Inland Empire, and rental demand is real. We handle the panel upgrade, the sewer cleanout, the Title 24 compliance, and the prefab or site-built choice. Read ADU Builders in Rialto for the full scope.
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 Rialto
We work hands-on with established ADU and materials brands including Cover, Dvele, and Mighty Buildings, matched to your Rialto lot, budget, and timeline. Parts and panels for these systems are stocked locally, which keeps typical turnaround predictable. See our brands for the full list and how we pair them to each project.
Pricing for ADU Company in Rialto, CA
Rialto pricing reflects the local conditions: older panels, sewer cleanout requirements, and a climate zone that demands better insulation and roofing than milder coastal builds. Here are the ranges we typically see:
| Service | Typical range in Rialto |
|---|---|
| Detached ADU (prefab, turnkey) | $180,000 – $280,000 |
| Detached ADU (site-built, turnkey) | $220,000 – $350,000 |
| Garage conversion (attached, to code) | $95,000 – $160,000 |
| Garage conversion (detached, with slab replacement) | $120,000 – $185,000 |
| Home addition (bedroom/bath wing) | $140,000 – $240,000 |
| Home addition (kitchen/family room expansion) | $160,000 – $280,000 |
| Electrical panel upgrade (100A to 200A) | $3,500 – $6,000 |
| Sewer lateral cleanout installation | $2,500 – $5,000 |
| Site prep and slab for detached ADU | $18,000 – $35,000 |
What pushes a Rialto price up is almost always under the surface: an unreinforced garage slab that fails the core test, a sewer lateral with no cleanout, or a panel that can’t carry the new load. We write the price before any work starts, and that written price is what you pay – no change at the door.
Neighborhoods We Serve in Rialto
We work across Rialto, from the central tracts near Foothill Boulevard up through the north-side neighborhoods where the lots run deepest. Here are some of the areas we know well:
- North Rialto
- Las Colinas
- Rialto Heights
- Downtown Rialto
- West Rialto
For most Rialto jobs, our scheduling team can have someone on-site for an estimate within the week, and we coordinate dispatch from the brand’s Inland Empire office so the crew that arrives knows these streets.
Service Area – Cities Near Rialto
While this page is about Rialto, our crews also cover the surrounding Inland Empire cities. Homeowners just across the line in Bloomington, CA and San Bernardino, CA often have the same lot geometry we see in Rialto. Fontana, CA and Grand Terrace, CA are also in our regular service area, each with their own page.
Serving Rialto, CA - Our Local Coverage Area
We’re based in the Rialto 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 Rialto
For most Rialto homes, we can schedule an on-site estimate within about a week. The visit includes a look at your panel, garage slab if one’s involved, and rear-yard depth, so the quote reflects the actual conditions, not a guess. Call (254) 602-5618 and we’ll get you on the schedule.
Yes. Rialto requires permits for ADUs, garage conversions, and additions, and inspections are part of the process. We pull the permits and coordinate the inspections on every job. Sewer and electrical upgrades that the city requires before a second unit gets approved are included in our written quote, not added later.
Yes. Every Rialto project gets a written price before any work begins, and that’s the price you pay. No change orders at the door, no “we discovered the slab was bad” surprises – we core and inspect first so the quote already accounts for Rialto’s common under-surface issues. Call (254) 602-5618 for your free estimate.
If you’ve been burned by a contractor who disappeared, changed the price, or left the job half-finished, we understand why you’d be cautious. Lodgewick puts everything in writing – the price, the timeline, and The Kingswell Guarantee with its 365-Day Done Right Promise. If the work isn’t right, we come back and make it right. Call (254) 602-5618 to schedule your free estimate, and let’s talk about what your Rialto lot can do.
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 Rialto Customers Say
"The ADU came out beautiful and the permitting, which terrified me, was handled start to finish. They kept me updated every week so I was never wondering what was happening."
- Shauna Mills"A whole backyard ADU from scratch. Terrified me going in, but they kept me updated weekly and there were no nasty surprises. Quality work and a fair price."
- Noreen Fletcher"Built a backyard unit for my mother in law. They handled the permits, gave me a real timeline, and stuck to it within a few days. The written price is what we paid, which anyone who's done construction knows is rare."
- Dennis Fairchild