ADU Company in San Bernardino, CA
Lodgewick ADU Builders handles accessory dwelling units, garage conversions, and home additions in San Bernardino, CA. This page is an overview of how those jobs work in this specific city, because San Bernardino is not like the coastal markets most ADU advice is written for. The lots are bigger, the heat is worse, and the utility infrastructure on older blocks can add real cost to a project before framing even starts. If you are pricing an ADU here, start with a conversation, not a national cost calculator. Call us at (254) 602-5618 and we will give you a written estimate based on your actual parcel.
Why San Bernardino Homes Are Different
San Bernardino’s residential grid grew fast after World War II, and it shows in the lot dimensions. Most single-family parcels run 7,000 to 9,000 square feet, which leaves genuine room for a detached ADU behind the house. That is a real advantage over denser cities, and it is why detached units are a serious option for so many homeowners here. The dominant housing stock is 1950s through 1970s wood-frame construction, with detached garages sitting at the back of the lot, which makes garage conversions one of the most cost-effective ways to add a rental unit or family suite in this city.
But San Bernardino also carries a specific burden. The city’s 2012 municipal bankruptcy left water and sewer laterals in many older residential blocks chronically undersized. When an ADU permit triggers a utility capacity review, which happens routinely here, homeowners often learn they need a lateral upgrade before the water meter or sewer connection will pass. That work can run several thousand dollars and out-of-area contractors rarely flag it early. We do. The terrain adds a second layer: Verdemont and other northern foothill neighborhoods near the San Bernardino National Forest boundary sit inside Very High Fire Hazard Severity Zones, where ADUs must meet ignition-resistant construction standards, including ember-resistant vents, Class A roofing, and non-combustible cladding. A flatland ADU a mile south avoids those costs. Same city, very different bill. And the basin heat, with summer highs regularly hitting 108 to 112 degrees, means cooling is not optional. Mini-split systems here need to be sized for severe heat gain, not the average-load assumptions a manufacturer’s chart might suggest.
Our Main San Bernardino Services
These are the three jobs San Bernardino homeowners call us about most often. Each has its own San Bernardino page with pricing, timelines, and the specifics of how that project works on these lots.
Home Addition Contractor in San Bernardino
A home addition in San Bernardino usually means attaching new square footage to a 1950s or 1960s wood-frame house, and the structural tie-in is where things get technical. Older stucco and scattered concrete-block construction in some neighborhoods complicates the connection between old framing and new, which affects both engineering and fire-wall compliance. We plan the addition around your existing footprint and the city’s current setback rules, then put every cost in writing before work starts. Home Addition Contractor in San Bernardino covers the full scope.
Garage Conversion Contractor in San Bernardino
San Bernardino’s detached garages, common on those wide post-war lots, are among the best garage conversion candidates in the Inland Empire. The structure already exists, which saves foundation and framing cost, but the conversion still has to clear residential standards: insulation, electrical, a proper entrance, and a cooling system that can handle San Bernardino summers. We walk the garage with you, check the slab, and tell you honestly whether conversion beats new construction on your lot. Garage Conversion Contractor in San Bernardino has the numbers.
ADU Builders in San Bernardino
Detached ADUs work well here because the lots have room, and because San Bernardino’s planning department processes more of these every year. The catch is what sits underground. Utility capacity reviews are standard on ADU permits in this city, and the lateral upgrade cost catches first-time ADU owners off guard more than anything else. We factor that into the estimate from day one, not as a surprise change order. ADU Builders in San Bernardino explains detached and attached options in detail.
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 San Bernardino
We work with several established ADU manufacturers and material suppliers and match the system to your lot and budget. In San Bernardino we regularly specify Cover panelized units for tight backyard access, Dvele for high-performance envelopes that handle this basin’s heat load, and Boxabl when speed of delivery matters most. Common parts are available through our Inland Empire supply chain, which keeps turnaround tighter than it would be otherwise. See our brands for the full list.
Pricing for ADU Company in San Bernardino, CA
| Service | Typical range in San Bernardino |
|---|---|
| Detached ADU (studio, 400 – 500 sq ft) | $185,000 – $265,000 |
| Detached ADU (1-bedroom, 600 – 750 sq ft) | $245,000 – $345,000 |
| Detached ADU (2-bedroom, 800 – 1,000 sq ft) | $315,000 – $430,000 |
| Garage conversion (studio, 300 – 400 sq ft) | $95,000 – $140,000 |
| Garage conversion (1-bedroom, 400 – 600 sq ft) | $120,000 – $175,000 |
| Garage conversion (2-bedroom, 500 – 700 sq ft) | $155,000 – $220,000 |
| Home addition (400 – 600 sq ft) | $115,000 – $185,000 |
| Home addition (600 – 900 sq ft) | $170,000 – $270,000 |
| Home addition (900 – 1,200 sq ft) | $250,000 – $380,000 |
| Utility lateral upgrade (if required, pre-ADU) | $4,000 – $12,000 |
What pushes a San Bernardino price toward the top of those ranges is usually one of three things: an undersized water or sewer lateral that needs replacement, a foothill parcel in a Very High Fire Hazard Severity Zone requiring ignition-resistant materials, or a structural tie-in to an older concrete-block or stucco home that complicates the engineering. None of these are surprises if they are identified up front, which is why we walk the property and pull utility records before quoting. Every Lodgewick project comes with a written price before work begins, and that price does not change at the door.
Neighborhoods We Serve in San Bernardino
Our San Bernardino crews work the whole city, from the flatland grid south of Highland Avenue up through the foothill districts. We know the difference between a Verdemont lot inside the fire zone and a Rialto-adjacent block where utility laterals are the bigger worry.
- Verdemont
- North Park
- Del Rosa
- Arrowhead
- Downtown San Bernardino
For most neighborhoods in San Bernardino, we can get a crew and estimator to your property within a few business days of your call. Foothill addresses may take a little longer during fire-season weeks when access and scheduling get tighter.
Service Area – Cities Near San Bernardino
Lodgewick ADU Builders serves San Bernardino and the surrounding Inland Empire communities. If your property is just outside the city line, we may still cover it. That includes Loma Linda, CA to the south, Highland, CA to the east, Rialto, CA to the west, and Colton, CA just across the 215. Call (254) 602-5618 and we will confirm coverage for your specific address.
Serving San Bernardino, CA - Our Local Coverage Area
We’re based in the San Bernardino 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 San Bernardino
Most San Bernardino homeowners get an estimator on site within three to five business days. Dispatch and scheduling run through our Inland Empire office, which keeps drive times short compared to contractors coming from Los Angeles or Orange County. Call (254) 602-5618 to get on the schedule.
Not every ADU triggers one, but in San Bernardino the review is routine whenever a project adds a second water meter or increases sewer demand beyond the existing lateral’s capacity. Older post-war blocks are the most common place we see required upgrades, and we identify that risk before you commit to a build.
No. Lodgewick works under The Kingswell Guarantee, which includes a written price provided before any work begins. If something is discovered mid-project that was not visible during the initial walkthrough, we discuss it with you in writing before proceeding, never after the fact. There are no price changes at the door. Call (254) 602-5618 to get your written estimate started.
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 San Bernardino Customers Say
"Junior ADU conversion inside the house. They protected the rest of our place with plastic and daily cleanup. Done nearly on schedule and on the number they quoted."
- Sabrina Veld"Garage conversion into an office and guest room. Fair written price, finished close to on schedule, and they fixed a small drywall crack under warranty months later without any hassle."
- Diana Cho"The ADU came out beautiful and the permitting, which terrified me, was handled start to finish. They kept me updated every week so I was never wondering what was happening."
- Shauna Mills