A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable Garage Conversion Contractor Across Bloomington
A garage conversion in Bloomington typically runs $85,000 to $165,000 before permit fees, depending on whether you’re converting an attached garage into a bedroom or a detached garage into a full ADU with its own kitchen and bath. The work usually takes 4 to 7 months from plans to final inspection when you’re dealing with San Bernardino County’s permitting path. If you’re on Cedar Avenue, along Locust, near Bloomington High, or up in the older tracts off Slover, we know these homes and the county process they require.
Fielding ADU Builders is the Garage Conversion Contractor team that prices the job in writing before any work starts. Call (361) 315-4177 and you’ll get a live person, day or night. Tell us what you want the space to become and we’ll walk you through the real scope, the real cost, and the calendar.
Why Fielding ADU Builders Is Bloomington’s Preferred Garage Conversion Contractor Company
Most Bloomington homeowners we meet have already had a contractor miss a schedule or move a number on them. That’s why the first thing we hand you is a written price, before a single nail is driven. Not a ballpark. Not a verbal. The number goes on paper. The Garrison Standard, which our parent organization has built to since 2006, requires it.
Every crew member on a Bloomington job is background-checked and arrives in uniform. You’ll know exactly who’s on your property and why they’re there. Our phone line is answered by a live person 24 hours a day, seven days a week. Call at noon or midnight, someone picks up.
We work with the county’s Land Use Services requirements every week. The permits, the inspections, the plan revisions, the Site Plan Review timeline. That matters more in Bloomington than in Rialto or Fontana because this is unincorporated county land, not a city with its own building department.
Garage Conversion ADU in Bloomington
A Garage Conversion ADU in Bloomington means turning your existing attached or detached garage into a legal second dwelling with its own kitchen, bathroom, sleeping area, and separate entrance. In this unincorporated part of San Bernardino County, the permit is reviewed by County Land Use Services in San Bernardino, not a Bloomington city hall. That changes the paperwork sequence, the inspection schedule, and the way we have to document the work.
For a Bloomington homeowner, this is the highest-value route when family is moving in, when the adult child can’t afford rent in Fontana or Riverside, or when they want rental income without buying more land. A full garage conversion ADU here runs $110,000 to $165,000 depending on whether the slab passes, how far the sewer line has to run, and what the county requires for fire separation.
Attached Garage Conversion
These are the most common conversions in Bloomington’s older tract homes off Locust Avenue and around the 92316 zip code. The garage shares a wall with the house. Services are close. But the county still treats it as a separate dwelling unit, which means separate metering or a documented shared-utility agreement, plus fire-rated separation between house and ADU. We scope that from day one.
Detached Garage to Full ADU
A detached garage gives you better sound separation and more design freedom, but it also means a longer trench for sewer and water, and usually a more involved foundation review. If the slab is sound, we build up. If it is not, we fix the slab before we frame. We price that up front, not as a surprise later.
Garage Apartment Conversion in Bloomington
A Garage Apartment Conversion in Bloomington is the right choice when the person living there is a family member, a caregiver, or a tenant you want close but not in the main house. It is a full living unit above the garage or replacing the garage space itself, with independent access, a kitchenette or full kitchen, and a bathroom.
We converted a detached two-car garage into a one-bedroom garage apartment off Cedar Avenue near Bloomington High. The existing slab was sound, but the garage door header had to be swapped for a properly engineered beam before we framed the new wall. We ran electrical and plumbing, insulated and drywalled, hung James Hardie siding on the street-facing addition, and passed the county’s final inspection with the kitchenette, full bath, and separate entry the homeowner wanted for a family member.
Expect this to run $95,000 to $140,000 in Bloomington depending on finishes, site conditions, and how much of the existing structure can be preserved. The county will want a Site Plan Review and separate utility connections. We handle the documentation so the owner never has to decode a county checklist.
Garage to Bedroom Without a Kitchen
When you don’t need the full ADU designation, a simpler garage-to-bedroom conversion under the home’s existing permit scope costs less, usually $55,000 to $80,000 in Bloomington. But if there’s any sleeping area plus a bathroom or kitchenette, the county defines it as a dwelling unit and the ADU rules apply. We tell you which category your project falls into before you spend money on plans.
Garage to Living Space With Separate Entry
For a home office, playroom, or guest suite without cooking facilities, this scope in Bloomington runs $50,000 to $90,000. The permit path is lighter, the timeline is shorter, and the county inspection focuses on egress, insulation, and electrical. We still price it in writing and stand behind the work for a full year.
Trusted Brands We Service in Bloomington
We’re fluent with Abodu, Cover, and Dvele prefab and modular systems, so if you’ve been researching a panelized or kit-built ADU inside your existing garage shell, we can evaluate whether that’s realistic on your Bloomington lot. Some Bloomington homeowners ask about Boxabl or Mighty Buildings; we’ll tell you straight whether the utilities, setbacks, and county review make a prefab path faster or slower than conventional framing. For conventional builds, we stock and install James Hardie siding because it holds up to the Inland Empire heat and Santa Ana winds better than vinyl. We don’t push one system over another. We match the method to your slab, your budget, and what the county will approve on your specific parcel.
Common Garage Conversion Contractor Problems We See in Bloomington Homes
- Slab assumptions that fail inspection. The big one. The existing garage slab and footing were built to hold a car, not a bedroom with a kitchen and bath. Under county inspection, the slab may need thickening or a new stem wall. That’s a change order nobody budgeted for, and it’s the most common surprise in Bloomington’s older slab-on-grade garages.
- Unpermitted original construction. A garage built in the 1960s or 1970s may have an undersized header or no records at all. The county won’t issue an ADU permit until the structure is verified and corrected. That forces a plan revision and sometimes a structural engineer’s stamp.
- Utilities scoped as an afterthought. A garage conversion ADU needs its own sewer connection, water service, and electrical panel capacity. In unincorporated Bloomington, the county treats this as a full dwelling unit, not a remodel. Underestimating the trenching and Site Plan Review timeline is a scheduling failure we see often.
- Wrong permit jurisdiction. Homeowners assume Bloomington has a city hall that issues permits. It does not. Everything routes through County Land Use Services in San Bernardino. If you file in the wrong place, you lose weeks. We file in the right place the first time.
Pricing for Garage Conversion Contractor in Bloomington, CA
Here’s what we quote in Bloomington for 2025 and 2026 work. A simple garage-to-bedroom conversion runs $55,000 to $80,000. A garage-to-living-space with a bathroom and separate entry runs $50,000 to $90,000. A full garage conversion ADU runs $110,000 to $165,000. A garage apartment conversion runs $95,000 to $140,000. Those ranges assume the existing slab can be reused. If the slab fails inspection, add $8,000 to $18,000 for new footings or a stem wall. If the sewer line has to run 40 feet or more to the street, add $6,000 to $14,000. If the panel needs an upgrade from 100 to 200 amps, add $3,500 to $6,000. We put every number in writing before work starts, so the figure you approve on day one is the figure on the final invoice. The Garrison Code: show up in the window, price in writing, by the book, leave it clean, stand behind it for a year. Call (361) 315-4177 for a free estimate and a written line-item quote.
We Also Serve Cities Near Bloomington
Our Inland Empire office coordinates dispatch and scheduling for Bloomington jobs and the surrounding cities. If you’re in Rialto, Fontana, Riverside, or Grand Terrace, we serve your area with the same written-price-first process and the same one-year guarantee. This page covers Bloomington specifically because the county permitting path here is different from the cities around us. Visit our Bloomington page for more detail on this service area.
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 Garage Conversion Contractor in Bloomington
You pull it from San Bernardino County Land Use Services, because Bloomington is unincorporated county land and has no city building department. The office is in San Bernardino, not Bloomington. We prepare and file the plans with the county directly, so you don’t have to interpret their checklist yourself. Call (361) 315-4177 and we’ll confirm the current filing path for your parcel.
Three things move the final number in Bloomington: the condition of the existing slab and footing, the distance from the garage to the sewer and water connections, and whether the existing garage was permitted and built with a properly sized header. Each of these is discoverable in advance. We inspect before we quote, and we put the price in writing so a county inspection surprise doesn’t become a change order you never approved.
Maybe. Older Bloomington homes on slab foundations were poured for cars, not living space. If the slab is sound and the county accepts it, we build up. If the slab is cracked, settling, or too thin, we thicken it or pour a new stem wall before framing. That cost is quoted in writing before work begins. We don’t discover it in the middle of the job and hand you a bill.
Most Bloomington garage conversions take 4 to 7 months from plan approval to the county’s final inspection. Plans and County Land Use Services review typically take 60 to 90 days before we start. The build itself runs 3 to 5 months depending on utility trenching, structural corrections, and inspection scheduling. We give you a written calendar with the quote, and we update it when something outside our control changes.
You can, but the county still reviews it as a dwelling unit conversion, which means the same slab, utility, and fire-separation requirements apply. Some prefab systems work well when the garage shell is sound and the module fits the existing opening. Other times, conventional framing is faster and cheaper in Bloomington because the county review path is simpler. We work with Abodu, Cover, and Dvele systems and will tell you honestly which one fits your lot before you spend money.
Reed Calloway leads our Bloomington garage conversion work, and he’ll be the one walking your slab, checking your header, and telling you what the county will actually require. If you want a contractor who puts the price in writing and stands behind it for a full year, call (361) 315-4177 today. Estimates are free, and the conversation is straight.
Written by Reed Calloway, Owner at Fielding ADU Builders, serving Bloomington and the surrounding Inland Empire communities.
