Fast, Reliable ADU Builders Across Bloomington
Building an accessory dwelling unit in Bloomington means navigating San Bernardino County’s permit process, not a city hall – and that’s where most projects hit their first snag. We know exactly what the County’s Land Use Services Department asks for on Bloomington parcels, including the zoning conformance check that legacy RL and AG-zoned lots trigger before permits can even be pulled. If you’re weighing a detached ADU, garage conversion, or in-law suite on your existing lot, call us at (254) 602-5618. We’ll walk your specific parcel through what it takes, in plain English, before you spend a dollar.
Why Lodgewick ADU Builders Is Bloomington’s Preferred ADU Builders Company
Bloomington homeowners ask us the same thing on nearly every first call: “What am I actually getting into?” It’s a fair question, because this community has been let down by contractors before. Russ Delmar leads our work here, and he’s spent years helping Bloomington families turn oversized lots and old detached garages into rentable or family-ready living space. We don’t lead with a sales pitch. We lead with the permit parcel check, a written price, and a document that says what happens if we miss something.
Every project we take on in Bloomington operates under The Kingswell Guarantee. That means a written price before work starts, a real arrival window, a clean job site every day, and a written guarantee on the completed build. If the work isn’t right within 365 days, we come back and make it right – free. That’s the 365-Day Done Right Promise, and it’s printed on every Bloomington contract, not recited over the phone.
We also answer our phones with a live person, around the clock. When you’re mid-build and a question comes up at 9 p.m. about the mini-split placement or the panel upgrade schedule, you’ll talk to someone who knows your job, not a voicemail tree.
ADU Construction in Bloomington
ADU Construction in Bloomington almost always begins with two realities: a large lot and an older home. The typical Bloomington property is a post-WWII single-family house from the 1950s through 1970s, often sitting on 15,000 to 20,000 square feet or more. That’s a huge advantage – lot-size constraints that squeeze projects in Rialto or Riverside barely register here. But the house itself usually carries 60 to 100 amp electrical service, cloth or even knob-and-tube wiring, and decades of additions that may or may not have been permitted.
That older-home reality is the single biggest reason an ADU Construction quote moves. We handle it by inspecting the existing panel and framing before we ever sign a contract. If the panel needs an upgrade or the slab needs a vapor barrier, that work gets written into the original price as a defined allowance – not discovered later as a surprise. A full ADU Construction in Bloomington, including a panel upgrade and finish work, typically runs $165,000 to $285,000 for a one-bedroom unit. A bare-bones studio conversion can start around $90,000 to $130,000, but that assumes no major electrical surprises.
Permit and Zoning First
We file every Bloomington ADU application with San Bernardino County Land Use Services, not a city building department. Parcels with legacy Rural Living or AG zoning need a zoning conformance check before anything else moves. We run that in week one.
Written Change Orders, Never Verbal Surprises
If we open a wall and find termite damage or a slab without a moisture barrier, you get a written change order with a number. You approve it before we touch it. That’s how we keep Bloomington projects on budget.
Detached ADU in Bloomington
Detached ADU in Bloomington is the most popular build we do, because the community’s agricultural roots left it with something most neighboring cities envy: big lots with existing detached garages, storage sheds, and even tack rooms. Converting one of those structures into a legal dwelling – or building a new freestanding unit – is often faster and cheaper than attaching to the main house. A new detached ADU in Bloomington typically runs $140,000 to $260,000 depending on size and finish level.
We opened up a 1962 detached garage conversion off Cedar Avenue near Bloomington High School and found exactly what we’d warned the homeowner about: a 60-amp panel feeding cloth-wrapped wiring, termite-chewed sill plates, and a slab poured without a moisture barrier. All of it had to be corrected before the County would sign off. Because we’d written allowances for panel upgrade, framing repair, and vapor barrier into the original contract, the homeowner approved one written change order instead of getting ambushed mid-build. We ran a 200-amp service, sistered the damaged studs, and set a Tuff Shed shell interior with a mini-split sized for the 108°F summer peak.
Garage Conversions and Shell Kits
We work with the building itself. If the garage framing is sound, we convert in place. If it’s not, we bring in a prefab shell – Abodu and Cover are two brands we’ve installed on Bloomington lots and know how to permit through the County.
Electrical and HVAC Load
Bloomington summers routinely hit 105 to 110°F. A detached ADU here needs a mini-split system sized for that inland heat, and the main home’s panel has to carry the new load. Both get planned, priced, and written before work starts.
Trusted Brands We Service in Bloomington
We install and service ADUs from a range of manufacturers, and we match the brand to your lot, budget, and timeline rather than pushing one name. For Bloomington garage conversions and compact units, we regularly use Tuff Shed shells with interior build-out. For full prefab detached units, we’ve worked with Abodu and Cover, both of which have passed County plan review on local parcels. If you’re considering a factory-built ADU to cut site time, we’ll give you straight feedback on what those units actually cost to site, connect, and finish here – not just the brochure price. James Hardie siding and trim hold up well against Bloomington’s dry heat and occasional Santa Ana wind, and we spec it on most freestanding builds.
Common ADU Builders Problems We See in Bloomington Homes
- Bounced permits from filing with the wrong agency. Bloomington isn’t an incorporated city. Homeowners (and some contractors) submit ADU applications to a municipal building department, only to lose weeks when the application bounces. Every Bloomington permit goes through San Bernardino County Land Use Services, and we file there from day one.
- Service panels that can’t carry the new load. Most original Bloomington homes from the 1950s and 1960s were built with 60 to 100 amp service. Running a full ADU off that panel is a code violation and a fire risk. We test panel capacity during the estimate, not after the walls are open.
- Zoning conformance surprises on large lots. Legacy RL and AG zoning on 15,000+ square foot parcels can trigger a zoning conformance check that flags setbacks and use rules. We run that check before design locks in, so the project doesn’t stall mid-permit.
- Hardwater corrosion on new plumbing. Bloomington draws water from the Santa Ana River basin, which is hard and accelerates corrosion in copper and PEX fittings. We plan for that either with water softener provisions or corrosion-resistant fittings, depending on the build.
Pricing for ADU Builders in Bloomington, CA
Real numbers for Bloomington ADU projects. A detached one-bedroom ADU typically runs $165,000 to $260,000. A garage conversion on an existing slab runs $110,000 to $195,000. A prefab unit from Abodu or Cover, sited and connected, usually lands between $180,000 and $280,000 once site work, permits, and utilities are counted. A Junior ADU carved from existing house square footage is the most budget-friendly path at $70,000 to $120,000. What moves the price most in Bloomington is the electrical panel – if your home needs a service upgrade, add roughly $4,000 to $8,000. Our estimates are free, written, and line-itemed. Call (254) 602-5618 and we’ll walk your actual parcel and home, then put the number in writing.
We Also Serve Cities Near Bloomington
Besides our ADU Builders in Bloomington work, we regularly take projects in Rialto, Fontana, Riverside, and Grand Terrace. If you’re on a large lot in any of those communities, give us a call. Our ADU Builders team coordinates from the Inland Empire office and serves Bloomington locally, with the same Kingswell Guarantee on every job.
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 Builders in Bloomington
Your Bloomington ADU permit goes to San Bernardino County Land Use Services. There is no city building department here. Parcels with legacy RL (Rural Living) or AG zoning also need a zoning conformance check before the County will even accept the ADU application, which can add two to three weeks of pre-permit work that neighboring cities like Rialto or Colton never face. Call (254) 602-5618 and we’ll run that check for your parcel before you commit to anything.
Expect a 60 to 100 amp panel, cloth or knob-and-tube wiring, and often a slab poured without a moisture barrier. On our Cedar Avenue conversion near Bloomington High School, we also found termite-chewed sill plates. All of it had to be corrected before the County would sign off. We write allowances for panel upgrades, framing repair, and vapor barrier into the original contract so those findings become one approved change order, not an ambush. Call (254) 602-5618 for an estimate that accounts for the age of your structure.
Bloomington sits in the inland San Bernardino Valley where summer highs regularly reach 105 to 110°F. An ADU here needs a properly sized mini-split or ducted system with insulation and air sealing built for that heat load. Coastal projects can get away with code-minimum HVAC. Inland Bloomington cannot. We size every unit’s cooling load using local climate data, not a generic template. Call (254) 602-5618 for a written estimate that includes the right HVAC for Bloomington summers.
Yes, in practice. Most Bloomington properties sit on 15,000 to 20,000+ square foot parcels, and some carry Rural Living or AG zoning. That gives you far more buildable room than neighbors in Rialto or Fontana. But the large-lot advantage comes with a catch: the County’s zoning conformance check can flag non-conforming setbacks or use restrictions on those same legacy parcels. We run that check first, then design to fit what the County will actually approve. Call (254) 602-5618 for a free parcel review.
You get a written change order with a specific price, and you approve it before we touch the work. That’s the whole point of the Kingswell Guarantee. We don’t discover problems and then send you a bigger bill with no explanation. Failed waterproofing, corroded pipes from Bloomington’s hard water, outdated wiring – those get documented, priced, and put in front of you in writing. If the work we do fails within 365 days, we come back and make it right for free. Call (254) 602-5618 and we’ll start with an inspection that costs you nothing.
A detached one-bedroom ADU in Bloomington typically runs $165,000 to $260,000. A garage conversion on an existing slab runs $110,000 to $195,000. A Junior ADU inside your existing home runs $70,000 to $120,000. All of these ranges assume working with Bloomington’s County permit pathway and include written allowances for the electrical and framing issues common to 1950s-1970s homes here. Call (254) 602-5618 for a free written estimate on your specific lot.
Written by Russ Delmar, Owner at Lodgewick ADU Builders. We serve Bloomington, California and the surrounding Inland Empire with ADU construction, garage conversions, and home additions under The Kingswell Guarantee.