A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Bloomington, CA
Adding an ADU, home addition, or room addition in Bloomington, CA means adapting to a city with older mid-century homes on generous lots, a hot-summer climate that demands smart insulation choices, and a permitting process that rewards getting your paperwork right the first time. We’re Benson ADU Builders, and we handle all three of those services from first sketch to final inspection. Call (903) 568-7222 to talk through your property and get a written price before any work starts.
Why Bloomington Homes Are Different
Bloomington sits in the San Bernardino Valley, which means summer temperatures routinely push past 100 degrees. That changes how we think about ADU and addition work here: wall assemblies get extra attention, window placement matters more, and a poorly insulated roof turns a new room into an oven by August. Many homes in Bloomington were built between the 1950s and 1980s, so we regularly encounter foundation types, rooflines, and electrical panels that require planning before we ever pour concrete. Lots here tend to be larger than what you find in nearby Fontana or Rialto, which gives ADU and addition projects more breathing room for setbacks, access lanes, and separate entrances.
Bloomington is not its own incorporated city. It falls under unincorporated San Bernardino County jurisdiction, which means ADU permits go through the county rather than a city planning desk. The rules are consistent with California state ADU law, but the paperwork route is different from what a Riverside or Fontana homeowner experiences. That matters because county reviews can hinge on parcel-specific details like septic locations, flood zone overlays, and recorded easements. We pull permits and handle that whole trail for you, and we put the plan and price in writing before a single shovel turns.
Our Main Bloomington Services
Bloomington homeowners call us most often for two things: building a new ADU in the backyard and expanding the existing house with a home addition or room addition. Each service has its own detailed Bloomington page below.
ADU Builders in Bloomington
Building an ADU in Bloomington means working with your existing lot, your existing house, and San Bernardino County’s ADU permitting path. We build with prefab brands like Abodu and Cover when the lot and design call for speed, or we go site-built when the parcel has quirks that need custom engineering. The county reviews for setbacks, height, and utility connections, and we handle that start to finish. See the full breakdown on our ADU Builders in Bloomington page.
Home Addition Contractor in Bloomington
A home addition in Bloomington usually means adding square footage to a house that’s been in the family for decades, often with a 1970s-era floor plan that no longer fits. We handle the structural tie-in, the roof transition, and the insulation upgrade so the new space stays comfortable through a valley summer. Everything goes through the county permit process, and every line item is in writing before work begins. Read more on our Home Addition Contractor in Bloomington page.
Room Addition Contractor in Bloomington
A room addition in Bloomington is the smart middle path: more space without the full footprint of a home addition. Think bedrooms, home offices, or a den built onto the existing slab or crawlspace. We commonly see older Bloomington homes where a single extra room changes how the whole house lives, and we plan the HVAC and window placement for this valley’s summer heat. Details are on our Room Addition Contractor 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 build with and service prefab systems from Abodu, Cover, Dvele, and James Hardie cladding on our Bloomington projects. These are brands you can research independently to verify quality. Parts and spec sheets are available locally through our our brands page, with most material questions answered same day.
Pricing for ADU Company in Bloomington, CA
Here are the typical ranges we quote for Bloomington work. These are ballpark figures to help you plan before calling.
| Service | Typical range in Bloomington |
|---|---|
| Detached ADU (1 bed, 1 bath) | $140,000 – $190,000 |
| Detached ADU (2 bed, 1 bath) | $190,000 – $250,000 |
| Garage conversion ADU | $95,000 – $130,000 |
| JADU (attached conversion) | $80,000 – $110,000 |
| Home addition (primary bedroom + bath) | $120,000 – $175,000 |
| Home addition (kitchen extension) | $100,000 – $150,000 |
| Room addition (single bedroom) | $55,000 – $85,000 |
| Room addition (home office / den) | $40,000 – $65,000 |
| Prefab ADU package (Abodu, Cover, Dvele) | $175,000 – $300,000 |
| Site prep, foundation and utilities for ADU | $25,000 – $45,000 |
What pushes a Bloomington job higher is usually the lot: older slab foundations needing structural work, overhead utility lines needing relocation, or a parcel that sits on a slope or in a flood overlay. Every price we give in Bloomington is written before work starts, so the number we agree on is the number you pay.
Neighborhoods We Serve in Bloomington
We cover all of Bloomington, from the older blocks near Valley Boulevard down to the newer clusters on the south side. Most of our customers are within a short drive, which keeps response times tight and site visits easy to schedule.
- Bloomington core, near Cedar Avenue and Valley Boulevard
- Blocks west of Cedar, toward the Fontana boundary
- Neighborhoods east of Cedar, approaching Rialto
- South Bloomington, closer to Jurupa Avenue
- North Bloomington, around the 10 freeway corridor
Service Area – Cities Near Bloomington
Beyond Bloomington, we serve nearby communities across the Inland Empire. If you’re in Rialto, CA, Fontana, CA, Riverside, CA, or Grand Terrace, CA, we’ll bring the same written-price promise to your project.
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. Bloomington is unincorporated San Bernardino County, so all ADU and addition permits go through county review. We prepare the plans, submit them, handle the corrections, and manage the inspections through final sign-off. Call (903) 568-7222 and we’ll check your parcel specifics.
We can typically get you on the schedule within a few days, depending on the season. A real person answers every call at (903) 568-7222, so you won’t sit through voicemail loops. The estimate is free, and you’ll get a written price before any work starts.
We do, and we’ll handle the HOA review process if your Bloomington neighborhood has one. Some older subdivisions here have CC&Rs from decades past, and we’ll run those down before we ever file for permits. Call (903) 568-7222 and we’ll look into it for your specific address.
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
"Booked a consult online and met the project manager two days later. Weekly progress updates arrived by text with photos. ADU finished on schedule."
- Hannah W."Clean, quiet crew. They respected the neighbors, kept noise to working hours, and swept the driveway every evening."
- Hope C."Communication was the best part. I always knew what was happening that week without having to ask."
- Dolly N.
