Fast, Reliable Bathroom Remodeling Across Bloomington
Bathroom remodeling in Bloomington typically runs $18,000 – $42,000 for a full gut-and-replace, with detached ADU bathrooms on well and septic systems landing on the higher end once percolation tests, pressure tank upgrades, and County permits are factored in. Most projects take 3 – 6 weeks from demolition to final inspection. If you’re planning a bathroom remodel anywhere in the 92316 zip code, call (866) 808-7312 to schedule a free estimate. We know Bloomington’s lots, its wells, its septic systems, and the County of San Bernardino requirements that shape every project here.
Why Cottage ADU Builders Is Bloomington’s Preferred Bathroom Remodeling Company
Bloomington is unincorporated San Bernardino County. That single fact changes how a bathroom remodel gets permitted, inspected, and built, and it’s the main reason Bathroom Remodeling clients here call us rather than a generalist contractor from Rialto or Fontana. We navigate County planning and building every week for ADU and interior work on Bloomington’s large, often unpaved lots. Homeowners off Cedar Street, Slover Avenue, and Jurupa Avenue regularly tell us the same thing: a contractor who already understands County water and septic rules saves them weeks of back-and-forth.
Neil Stratton, who leads our team, has structured our whole operation around residential square-footage work: ADUs, kitchens, and bathrooms. That focus means your Bloomington bathroom isn’t competing with a commercial roofing job for our attention. We work with the brands you’ve already been researching, including Mighty Buildings and Boxabl, and we bring that same fluency to every fixture, valve, and vent we install inside. From permit to punch-list, one team handles it.
Our Bathroom Remodeling Services in Bloomington
Primary Bathroom Remodeling
Primary bathrooms in Bloomington’s older ranch homes, most built between the 1950s and 1980s, tend to be tight: 5 feet by 8 feet with a single vanity and a tub-shower combo. We regularly open these up by borrowing square footage from an adjacent closet or hallway, which works well on the large lots where Bloomington homes sit, since there’s often an outbuilding or extra bedroom to absorb the storage loss. Expect to address original cast-iron drain lines and often a floor that’s settled unevenly after 50 or 60 years.
Detached ADU Bathroom Remodeling
This is where Bloomington looks completely different from Rialto or Fontana. Many ADUs here started as unpermitted garage conversions or old second units, and their bathrooms were added decades ago without County sign-off. We remodel these spaces properly: permit pulled, plumbing brought to current code, and ventilation sized for a detached structure that bakes in the summer heat. On a half-acre lot off Cedar Street in Bloomington, we remodeled the bathroom in a detached ADU that had been an unpermitted converted garage. The existing well couldn’t support the added fixtures, so we scoped a pressure tank upgrade and low-flow fixtures before pulling the County permit. We framed with James Hardie backer board, installed a 110 CFM exhaust fan with a thermal switch, and the final inspection cleared without a hitch.
Hall and Guest Bathroom Updates
Guest bathrooms in Bloomington homes get a lot of use from multigenerational households, which are common in this part of the Inland Empire. We routinely replace fiberglass shower surrounds with tile, swap builder-grade vanities for solid-wood units, and add blocking for grab bars so the bathroom serves older family members safely. If the home is on septic, we keep the spec at 1.28 gallons per flush or lower on the toilet and cap the showerhead at 1.8 GPM, which keeps the drain field comfortable.
Accessibility and Aging-in-Place Bathrooms
Bloomington has a strong share of long-term homeowners who plan to stay in the house as they age. We do curbless showers, widened door openings, and wall-hung vanities on projects across 92316. Because many Bloomington homes sit on slab foundations, a curbless shower sometimes requires recessing the floor or building up the surrounding floor plane, and we scope that before quoting, not after demo starts. County inspection is part of the process, and we pull the permit on every one of these.
What happens when you call
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A real person answersNo phone trees — you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Bloomington
We work with the brands you’ve already been researching. If your ADU shell came from Mighty Buildings, Boxabl, or Plant Prefab, we know how those wall and floor systems behave when you’re cutting in a bathroom, where to run plumbing chases, and which backer-board and waterproofing approaches match the factory-built tolerances. We keep common parts and rough-in materials staged locally for Bloomington jobs, which avoids the long trip back to a supply house in San Bernardino or Riverside when a rough-in inspection is scheduled. Tuff Shed structures converted to ADUs are another common sight on Bloomington lots, and we’ve done enough of them to know exactly where the wiring and plumbing will fight you.
Common Bathroom Remodeling Problems We See in Bloomington Homes
- Skipped percolation or well-yield tests. On Bloomington’s large lots served by private wells and septic, adding a second bathroom or enlarging a shower can push the system past its capacity. You won’t know until the new fixtures go in and the pressure drops or the drain field backs up. We verify capacity before design, not after drywall.
- Assuming city sewer and municipal setbacks. Bloomington routes through the County of San Bernardino, which requires larger distances from wells, septic tanks, and lot lines than Rialto or Fontana codes do. A plan that works in a Fontana cul-de-sac can fail County setback review on a half-acre Bloomington parcel.
- Undersized ventilation in a hot, dry climate. Bloomington sits east of the Cajon Pass with intense summer heat and Santa Ana winds. A cheap 50 CFM fan in a detached ADU bathroom leads to moisture buildup and peeling paint within a year. We size exhaust to the cubic footage of the room and add a thermal switch so the fan keeps running after the humidity spike.
- Slab foundation surprises. Many of Bloomington’s older stucco ranch homes are slab-on-grade. Moving a toilet or shower drain means cutting concrete, and we plan for that in the quote. If the slab has settled, which is common on the area’s sandy soils, we address the floor plane before tile goes down.
Pricing for Bathroom Remodeling in Bloomington, CA
A standard hall bathroom remodel in Bloomington runs $18,000 – $28,000 when you’re keeping the existing footprint and replacing fixtures, tile, vanity, and lighting. A primary bathroom expansion runs $30,000 – $42,000 depending on how much square footage you’re adding and whether the home is on septic or city-sewer-equivalent. A detached ADU bathroom remodel on a well-and-septic lot typically runs $22,000 – $35,000, with the higher end reflecting percolation tests, a pressure tank upgrade, and County permit fees. What moves the price: moving the toilet or shower drain on a slab, the condition of the existing cast-iron lines, and the septic and well upgrades the County will require. We give written line-item quotes, and the price won’t change once work starts unless you change the scope. Call (866) 808-7312 for an exact quote on your Bloomington property, free.
Key Takeaways for Bloomington Homeowners
- Bloomington is unincorporated, so your bathroom remodel goes through County of San Bernardino planning and building, not a city office.
- If your property is on a well and septic, which much of 92316 is, capacity verification happens before design, not after demo.
- Expect to pay $18,000 – $42,000 for a full bathroom remodel here, with ADU bathrooms on septic at the upper end.
- We’re a residential-only builder: ADUs, kitchens, and bathrooms. That’s the whole scope.
We Also Serve Cities Near Bloomington
Cottage ADU Builders works throughout the Inland Empire beyond Bloomington. If your property is in Fontana, Rialto, Glen Avon, or Pedley, we handle the same scope: ADU bathrooms, primary baths, and kitchen remodeling, with the same County and city permit fluency. Call (866) 808-7312 and we’ll set up a site visit.
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 – Bathroom Remodeling in Bloomington
Yes. Bloomington is unincorporated San Bernardino County, so a bathroom remodel inside a detached ADU requires County building permits, and often plumbing and mechanical sign-offs, even if you’re just swapping fixtures in place. We pull the permits and schedule every inspection. Call (866) 808-7312 and we’ll tell you exactly what your specific property triggers.
Your septic system has a rated capacity in gallons per day, and a new bathroom adds to the load. The County may ask for a percolation test to confirm the drain field can handle it, and if you’re on a well, we may need a yield test to verify the pump can support another shower and toilet. A pressure tank upgrade, which runs $1,200 – $2,500 in Bloomington, is a common add-on. We test early so the cost is in the quote, not a surprise.
Yes, and this is one of our most common Bloomington projects. Many lots here carry a converted garage or second unit that was never permitted. We bring the bathroom to current code, legalize the space as part of the remodel, and handle the County paperwork, including the water and septic reviews that unpermitted units almost always trip. Estimates are free, call (866) 808-7312.
We recommend at least 80 CFM for a 40-square-foot bathroom and 110 CFM or more for larger ADU baths, with a thermal or humidity switch so the fan runs long after a shower. Bloomington’s summer heat means a detached ADU bathroom can hold heat and moisture for hours without proper exhaust, and that’s what turns into warped doors and mold in the grout. We spec the fan to the room, not the cheapest unit at the supply house.
We deliver materials with a truck or trailer that handles unpaved and sandy Bloomington lots without tearing up the yard. If your driveway from Jurupa Avenue or Slover Avenue is long and loose, we stage materials near the ADU or outbuilding and keep a clean path for the County inspector. For large lots with gates and fencing, we’ll coordinate access with you before the first delivery lands.
Written by Neil Stratton, Owner at Cottage ADU Builders, serving Bloomington and the Inland Empire’s residential ADU, kitchen, and bathroom projects.
Get Your Free Bloomington Bathroom Remodeling Estimate
Tell us about your Bloomington property, whether it’s on well and septic, and what you want the bathroom to do. We’ll walk the site, price the permit path through San Bernardino County, and give you a written line-item estimate before any work begins. Call (866) 808-7312 to schedule yours. Licensed, insured, and focused on one thing: making the square footage you already have work harder.