ADU Company in Bloomington, CA
Bloomington homeowners exploring an ADU, garage conversion, or home addition are usually working with something most Southern California cities can’t offer: space. This unincorporated San Bernardino County community is full of oversized lots from its agricultural past, and that changes the math on nearly every project we price here. Because Bloomington has no city hall, permits run through the County’s Land Use Services Department, which means a different timeline and a different set of rules than neighboring Rialto or Colton. If you’re weighing an ADU on a Bloomington property, call (254) 602-5618 for a free estimate with a written price before any work begins.
Why Bloomington Homes Are Different
Most Bloomington homes were built between the 1950s and 1970s, during a stretch when San Bernardino County allowed generous parcel sizes. A large share of lots run 15,000 to 20,000 square feet or more, and some still carry legacy Rural Living or agricultural zoning left over from the area’s farming and horse-property days. That means the classic ADU obstacle, a lot too small to fit another dwelling, barely exists here. What does come up constantly is the backyard detached garage. These older homes were often built with a separate garage, storage shed, or even a tack room sitting fifty feet from the house, and those structures make excellent ADU conversion candidates when the foundation and framing check out.
We also see an electrical reality on many of these older Bloomington properties: a 60 to 100 amp service panel that predates modern codes. An ADU can’t legally be energized on that panel, so a service upgrade lands in the budget on a meaningful share of our Bloomington projects. Summertime matters too. Bloomington regularly hits 105 to 110 degrees in July and August, so HVAC sizing and attic insulation get far more attention here than they would on a coastal ADU. And the local water supply, drawn from the hardwater Santa Ana River basin, shortens the life of untreated copper and PEX fittings, which is why we often include a water softener stub-out in our Bloomington ADU plans.
Our Main Bloomington Services
Three project types account for nearly every call we take from Bloomington homeowners: additions that expand the main house, conversions that turn an existing detached garage into living space, and ground-up ADUs built in the backyard. Each has its own permitting path through San Bernardino County, and each gets its own Bloomington page with the pricing detail and local specifics you’ll want before you decide.
Home Addition Contractor in Bloomington
A home addition in Bloomington usually means extending the footprint of a 1950s or 1960s ranch-style home, and on these oversized lots there’s rarely a setback issue that kills the plan. The bigger variable is County permitting: depending on whether the parcel still carries Rural Living zoning, the project may need a zoning conformance check before a building permit is issued, which can add two to three weeks to the front end. We price every addition with a written, line-item quote before any work starts, so you’ll know the full number including permit fees and the electrical service upgrade if your panel needs one. See Home Addition Contractor in Bloomington for the full breakdown.
Garage Conversion Contractor in Bloomington
Detached garage conversions are the most common way Bloomington homeowners add an ADU, because the footprint already exists and the structure is often oversized by today’s standards. The condition of the slab, the age of the roof framing, and the distance from the garage to the existing electrical panel drive most of the cost. Older Bloomington garages frequently need the electrical service upgraded at the same time, and many were never insulated, which matters in an inland valley summer. We inspect first, then put a written price in front of you. The full cost breakdown is on the Garage Conversion Contractor in Bloomington page.
ADU Builders in Bloomington
Building a new ADU from the ground up in Bloomington is a different exercise than most cities because the lot sizes actually allow it without squeezing the backyard. Prefab and panelized options from manufacturers like Abodu and Cover can shorten the construction timeline significantly, and on a Bloomington parcel with a large rear yard, the site preparation is usually straightforward. County Land Use Services will be your permitting authority rather than a local building department, and we handle that paperwork as part of the build. Current pricing for detached and attached ADUs in Bloomington is on the ADU Builders in Bloomington page.
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 Bloomington
We work hands-on with several ADU systems and material lines that suit Bloomington’s lot sizes and climate, including Abodu, Cover, Dvele, and James Hardie siding and trim. Having worked with these systems across many Inland Empire projects means we can give you realistic timelines and honest comparisons between prefab and site-built approaches. See our brands page for a fuller picture.
Pricing for ADU Company in Bloomington, CA
| Service | Typical range in Bloomington |
|---|---|
| Detached ADU (site-built, 400 – 800 sq ft) | $180,000 – $350,000 |
| Prefab ADU (Abodu, Cover, or similar) | $150,000 – $280,000 installed |
| Attached ADU (conversion of existing wing) | $120,000 – $220,000 |
| Garage conversion to ADU (detached) | $90,000 – $180,000 |
| Garage conversion with second story | $180,000 – $300,000 |
| Home addition (ground-level, 300 – 600 sq ft) | $140,000 – $260,000 |
| Electrical service upgrade to 200 amps | $3,500 – $7,000 |
| Mini-split HVAC for ADU (2 – 3 zones) | $8,000 – $16,000 |
| Full plumbing rough-in for ADU | $12,000 – $24,000 |
What pushes a Bloomington price toward the higher end is usually the electrical panel upgrade on an older home, the HVAC demands of a 105-degree summer, or a parcel that still needs a zoning conformance check before the permit can proceed. Every quote we give is written, itemized, and fixed before work begins, so the number you approve is the number you pay, with no change orders at the door.
Neighborhoods We Serve in Bloomington
We work across all of Bloomington, from the older ranch-home streets near Valley Boulevard to the larger horse-property parcels on the community’s east and north edges. Scheduling is coordinated from the brand’s Inland Empire office, and our crews serve Bloomington locally throughout the week.
- Bloomington east of Cedar Avenue, including large RL-zoned parcels
- West Bloomington near the Rialto border, where lots run slightly smaller
- South Bloomington toward the Jurupa area, many converted agricultural parcels
- North Bloomington neighborhoods near the 10 Freeway, a mix of 1970s homes
- Central Bloomington around Valley Boulevard, older detached-garage housing stock
Service Area – Cities Near Bloomington
Along with Bloomington, we take ADU, garage conversion, and addition projects in the surrounding Inland Empire communities. If your property is in Rialto, CA, Fontana, CA, Riverside, CA, or Grand Terrace, CA, we can quote the same written-price guarantee there as well.
Serving Bloomington, CA - Our Local Coverage Area
We’re based in the Bloomington 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 Bloomington
Yes. Because Bloomington is unincorporated, every ADU, garage conversion, and addition permit runs through San Bernardino County Land Use Services rather than a city building department. We prepare the application, handle zoning conformance checks where required, and manage the County review process as part of the project. Call (254) 602-5618 and we’ll walk you through your parcel’s specific path before you commit.
Most Bloomington ADUs take four to seven months from permit application to final inspection, with prefab systems like Abodu or Cover running on the shorter end and site-built projects on the longer end. County zoning conformance checks can add two to three weeks up front on legacy RL or agricultural parcels. We’ll give you a written timeline with your written price, so both are fixed in advance.
Many will. Homes built in the 1950s through 1970s around Bloomington often still run on 60 to 100 amp panels, and code requires a 200 amp service to legally support a new dwelling unit. We include the service upgrade as a line item in your quote when the existing panel can’t carry the load, rather than surprising you with it mid-build. Call (254) 602-5618 for a free estimate that accounts for it up front.
If you’re ready to price an ADU, garage conversion, or addition on your Bloomington property, call (254) 602-5618 for a free estimate. You’ll get a written price before any work starts, the 365-Day Done Right Promise in writing, and a live person on the phone whenever you call.
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 Bloomington Customers Say
"Garage conversion into an office and guest room. Fair written price, finished close to on schedule, and they fixed a small drywall crack under warranty months later without any hassle."
- Diana Cho"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