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
Bloomington is a San Bernardino County community where lot sizes often allow for more than most homeowners realize. Our work here spans detached ADUs, garage conversions, and room additions, and each brings its own set of local conditions: older post-war housing stock, expansive clay soils that shift with the seasons, and a permitting process that moves at the county’s pace, not ours. If you’re weighing an ADU against a room addition in Bloomington, the short answer is that an ADU usually delivers more long-term value per square foot, but a well-planned addition can be the faster, less disruptive path. Call (472) 248-8213 and we’ll talk through what your specific lot can support.
Why Bloomington Homes Are Different
Much of Bloomington’s housing stock dates to the 1950s through 1980s, which means we’re almost always working with existing electrical panels at or near capacity, slab foundations with no basement access, and rooflines that were never designed to tie into a second structure. That’s a different job than building in a brand-new subdivision where the panel has empty breakers and the soil has been pre-compacted. Around the Lankershim Avenue and Cedar Avenue corridors, we regularly see lots that are wider than deep, which changes how we position a detached ADU to preserve yard space and keep the required setbacks (the gap between your new structure and the property line) from eating into usable room.
Soil matters here, too. The clay-heavy ground around Bloomington expands when wet and shrinks when dry, which means slab and footing design needs to account for movement that some builders overlook. A crack in your existing driveway is a hint that the soil is reactive. We design for that rather than discovering it midway through the project. Add in San Bernardino County’s ADU permit process, which has gotten more streamlined since the state’s ADU mandates but still requires patience and complete plan sets, and you can see why hiring someone who has submitted plans here before, rather than learning the process on your job, is worth the difference.
Our Main Bloomington Services
Most Bloomington homeowners start with one of these three jobs. Each has its own page with local pricing, timelines, and what to expect, so start there and then call when you’re ready for a written quote.
Home Addition Contractor in Bloomington
A home addition in Bloomington often means pushing out from a existing footprint, tying a new roofline into a 40-, 50-, or 60-year-old structure, and matching siding, window trim, and interior floor heights so the addition doesn’t announce itself as an afterthought. The local condition that matters most: many Bloomington homes sit on slab foundations, so our crew has to saw-cut and pour new footings that tie into the existing slab cleanly. That’s standard work for us, but it’s a step that separates a properly done addition from one that shows a hairline crack at the seam within a year. See Home Addition Contractor in Bloomington for full pricing and the build timeline.
ADU Builders in Bloomington
An ADU in Bloomington is typically a detached structure in the back third of the lot, which means our team spends the first day or two on access planning: where the concrete pumper sits, how the excavation spoils leave the property, and whether the fence has to come down to get equipment through. County zoning here treats ADUs as a by-right use on most single-family lots, but the practical constraints are lot-specific. Slope, drainage, and the location of your sewer lateral all shape the site plan. We’ll identify all of that during the estimate visit, not after the permit is filed. Get the full picture at ADU Builders in Bloomington.
Room Addition Contractor in Bloomington
A single room addition, a larger bedroom, a home office, a den, works especially well in Bloomington homes where the original floor plan runs long and narrow. We match the existing roofline or step it down slightly, depending on what the structure allows. The local factor here is stucco matching. Many Bloomington exteriors are traditional three-coat stucco with years of sun fade, and getting the new wall to blend takes a careful patch and color-match, not just a fresh coat over the whole wall. Read more on scope and cost at Room Addition Contractor in Bloomington.
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 with several major prefab and panelized ADU lines, including Abodu, Cover, and Dvele, and we can advise honestly on which one fits your Bloomington lot, foundation, and budget. Our our brands page covers what each system does well, and our team can order and coordinate the delivery so you’re not juggling a manufacturer and a general contractor separately.
Pricing for ADU Company in Bloomington, CA
| Service | Typical range in Bloomington |
|---|---|
| Detached ADU (400 – 600 sq ft, prefab) | $180,000 – $240,000 |
| Detached ADU (600 – 800 sq ft, site-built) | $220,000 – $320,000 |
| Garage conversion to ADU (400 – 500 sq ft) | $120,000 – $180,000 |
| Room addition (200 – 300 sq ft, single room) | $80,000 – $140,000 |
| Room addition (300 – 500 sq ft, multiple rooms) | $140,000 – $220,000 |
| Foundation upgrade for reactive clay soil | $8,000 – $18,000 |
| Electrical panel upgrade to 200A | $3,500 – $6,500 |
| Site prep and demolition | $5,000 – $15,000 |
| Sewer lateral repair or relocation | $4,000 – $12,000 |
| Stucco match and exterior finish | $6,000 – $14,000 |
What pushes a Bloomington price up is almost always underground: expansive soil that needs deeper footings, a sewer lateral in the wrong place, or a panel that needs a full service upgrade before anything else can be built. We write every price down before work starts, and the number on that sheet is the number you pay. No change orders passed through silently, no scope creep billed at the end.
Neighborhoods We Serve in Bloomington
We cover the full Bloomington area. Most calls come from the neighborhoods below, and because scheduling is coordinated from our Inland Empire office, we can typically get to any Bloomington address within a day or two for an estimate visit.
- West Bloomington, near the 10 Freeway
- The Cedar Avenue and Lankershim Avenue corridors
- East Bloomington, near the Rialto border
- South Bloomington, off Jurupa Avenue
- Bloomington proper, near Valley Boulevard
Service Area – Cities Near Bloomington
We serve Bloomington and the surrounding communities. If you’re one town over, we can still help. Our work regularly takes us into Rialto, CA, Fontana, CA, Riverside, CA, and Grand Terrace, CA. Call and we’ll confirm coverage for your specific address and get an estimate visit scheduled.
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
Most estimate visits in Bloomington can be scheduled within two or three business days. Because our scheduling runs from the Inland Empire office, we don’t have to route a crew across the metro to reach you. Call (472) 248-8213 and we’ll set a window that works for you.
Most Bloomington neighborhoods are not governed by a homeowners association, but if yours is, California state law limits an HOA’s ability to block an ADU. We’ll identify any HOA involvement during the estimate and handle the paperwork so you don’t have to navigate it alone. The county permit itself is the bigger lift, and we submit those plans for you.
Our field personnel are background-checked, identity-verified, uniformed, and photo-badged under the Threshold Standard. You’ll get a name and photo before anyone arrives, and the same crew that shows up for the estimate is the crew that does the work. We don’t hand your home off to unfamiliar subs without telling you first.
Call (472) 248-8213 to schedule your free Bloomington estimate. A written price, a named crew, and a 365-day written promise on every project.
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
"Itemized estimate with allowances laid out. Final cost was within a hair of the quote."
- Naomi R."Backyard ADU for my mother. The project manager showed ID and walked me through the permit steps, the foundation plan, and the schedule. Moved her in on time."
- Margaret C."Insulated the walls and ceiling properly. It stays comfortable even in July."
- Tamika W.
