Kitchen remodeling
Bathroom remodeling
Home additions & ADU
Roofing
Windows & doors
Driveway & pavers
FenceFree written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable General Contractor Across Muscoy
Most general contractors in San Bernardino County don’t actually understand Muscoy. They treat it like any other Inland Empire ZIP code. We don’t. A General Contractor working in Muscoy has to deal with county permitting, unpermitted additions, septic setbacks, and open-lot grading in ways a city job never touches. Nelson Ibarra and our crews have handled all of it across the 92405 ZIP code. If you’re planning a home addition, an ADU, a garage conversion, or a full remodel on Muscoy acreage, call (833) 467-7020 and we’ll walk you through what actually has to happen before you spend a dollar.
Why Alder Contractors Is Muscoy’s Preferred General Contractor Company
Muscoy is unincorporated county territory. That single fact changes everything about how a remodeling job gets permitted, inspected, and priced. We’ve spent years working through San Bernardino County Land Use Services for Muscoy homeowners, and we know which projects trigger plan reviews that add weeks and which ones can move faster. Our customers in Muscoy consistently tell us the same thing: they called us because we could explain the county process without making them feel lost in it.
What matters in this area is sequencing. When a property has an unpermitted garage conversion from the 1980s sitting next to a perfectly legal house, neither one gets touched until we know what the county will require. We handle that discovery before we quote. That’s why homeowners off Cajon Boulevard and along the unpaved side streets keep our number. We’re not the cheapest bid in Muscoy and we won’t pretend to be. We’re the contractor who shows up, pulls the right permits, and doesn’t surprise you with a change order halfway through.
Nelson Ibarra has built Alder Contractors around one principle: one contractor, every phase. From the roofline to the backyard, we manage the trades, the county paperwork, and the material schedule under a single contract. For Muscoy homeowners, that means you’re not on the phone with a county planner, a septic inspector, and three subs. You’re on the phone with us.
Styles & brands we work with







Licensed General Contractor in Muscoy
A Licensed General Contractor in Muscoy works under San Bernardino County jurisdiction, not a city building department, and that distinction drives every estimate we write. When you’re adding a room, converting a garage, or building a detached ADU on a Muscoy lot, the county requires plan checks, setbacks from septic and well lines, and often a geotechnical review on open land. We scope all of that before we quote. The job itself can run anywhere from $30,000 for a garage conversion to $130,000 or more for a full home addition, and the county component is baked into those numbers from day one.
County Permitting and Compliance Work
Muscoy has a higher rate of unpermitted construction than almost any other area we serve. Detached rooms, enclosed patios, converted garages, second kitchens. We routinely discover that a “minor remodel” actually requires bringing a 20-year-old unpermitted addition into compliance first. Our process: we pull the property history from the county before quoting. If there’s unpermitted work, we tell you what legalizing it will cost and what order the county will require. No surprises after demo starts.
Septic, Well, and Setback Reviews
A lot of Muscoy properties operate on septic and well systems, not municipal sewer and water. That means any addition, detached ADU, or shop build has to clear county setback requirements from those systems. A 400-square-foot ADU that looks simple on paper can get complicated if it encroaches on the septic leach field or sits inside the well setback. We measure, we map, we verify before you sign anything.
Residential General Contractor in Muscoy
As a Residential General Contractor in Muscoy, we handle whole-home remodels, room additions, and exterior replacements on properties that don’t fit the standard Southern California subdivision mold. Many Muscoy homes are single-story builds from the 1950s through the 1970s, with owner-built additions that were never permitted. Roofing has taken a beating from Inland Empire heat. Stucco and paint fail fast under that same sun. And fencing gets stressed by the dry Santa Ana winds that blow through the pass. Our residential work in Muscoy accounts for all of that before the first nail goes in.
Whole-Home and Additions on Acreage
When you’re working on a half-acre or larger lot in Muscoy, you’re not just remodeling a house. You’re managing drainage across the property, equipment access, and sometimes a material haul that has to cross soft or uneven ground. We’ve set additions and detached structures on piers specifically to handle the open-lot runoff patterns we see out here. That’s not a change order later. That’s how we scope it up front.
Interior Remodel Scope
Kitchens and baths in Muscoy’s older homes often carry plumbing and electrical that was never brought up to code. A Muscoy kitchen remodel typically runs $14,000 to $45,000, and part of that cost is correcting what’s behind the walls before we install new cabinets and countertops. We walk you through every line item. You’ll know what’s renovation and what’s correction.
Trusted Brands We Service in Muscoy
We build with materials that hold up to Muscoy’s heat and dry wind. For roofing, we regularly specify GAF and CertainTeed shingles that carry strong UV and wind warranties. For windows and doors, we work with PGT and CGI products rated for high sun exposure and airborne debris during Santa Ana events. For siding and trim, Boral and James Hardie hold their finish far longer than the original wood siding on most Muscoy homes. We stock common replacement components for these brand lines so warranty work and punch-list items don’t stall waiting on parts. One contractor, every phase, with the material access to match.
See the difference
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After
Before
After
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AfterCommon General Contractor Problems We See in Muscoy Homes
- Unpermitted additions and converted garages. A huge share of Muscoy’s housing stock has rooms, kitchens, or living spaces that never went through San Bernardino County. Any new project touching those areas pulls them into the compliance scope.
- Septic and well setback conflicts. Detached structures, ADUs, and even large additions can’t sit wherever the lot looks empty. Setbacks from septic systems and wells drive placement, and we’ve seen plans die on the county’s desk because nobody checked first.
- Open-lot grading and drainage. Muscoy’s flat and semi-rural lots collect runoff in ways a tract home never does. We’ve added over-excavation, french drains, and pier systems to jobs where another contractor quoted a simple slab and left the homeowner with a swamp.
- Heat- and wind-damaged exteriors. The Inland Empire sun shreds average roofing and paint. Santa Ana winds wreck weak fencing. We see premature shingle failure and warped siding on Muscoy homes constantly, and we recommend materials rated for that exposure.
Pricing for General Contractor in Muscoy, CA
Here’s the honest pricing picture for Muscoy, based on what we’ve quoted and built in the 92405 ZIP code. These ranges reflect current material costs, county permit fees, and local labor.
| Project Type | Muscoy Price Range |
|---|---|
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Garage Conversion | $30,000 – $80,000 |
| Kitchen Remodel | $14,000 – $45,000 |
| Bathroom Remodel | $9,000 – $28,000 |
| Roof Replacement | $8,000 – $20,000 |
What moves the number on any Muscoy job is county compliance work. If your property has unpermitted construction, legalizing it adds cost before your new project even starts. Septic and well setbacks can force a redesign. Open-lot drainage can add pier work or french drains. We put all of that in the estimate up front. You’ll get a written line-item quote, not a lump sum with vague allowances. Call (833) 467-7020 to schedule a free estimate and we’ll walk the property with you before we put a number in front of you.
We Also Serve Cities Near Muscoy
Our crews work throughout San Bernardino County. Beyond Muscoy, we regularly serve San Bernardino, Rialto, Highland, and Crestline. The permitting and build issues are different in each one. If your project sits in any of those areas, give us a call and we’ll tell you what applies to your specific property.
Serving Muscoy, CA — Our Local Coverage Area
We’re based in the Muscoy 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 General Contractor in Muscoy
No, you don’t need a city permit because Muscoy isn’t a city. All permits and inspections for ADU construction in Muscoy go through San Bernardino County Land Use Services. County plan review typically includes site plan review, setback verification, and possibly a soils report depending on your lot. We handle the entire county submittal on your behalf. Call (833) 467-7020 and we’ll tell you exactly what your property will trigger.
The county can require you to legalize unpermitted work before approving a new permit on the same parcel. That means the old addition or conversion has to be inspected, brought to current code where required, and documented before your new project moves forward. We’ve done dozens of these compliance corrections in Muscoy. We pull the county property history before we quote so you know the full scope on day one.
Setbacks from your septic system and well determine where a detached structure can legally sit on your lot. If the county’s required distance can’t be met, the structure moves or the design changes. We verify setbacks during the estimate phase, not during the permit review. That’s one more reason our Muscoy quotes hold up.
Open lots in Muscoy don’t have city storm drains to carry runoff. Water pools, flows toward structures, or sits against foundations. We may need over-excavation, french drains, or pier footings to keep the new structure dry and the county happy. A flat slab quote that ignores drainage is a change order waiting to happen. We scope it correctly from the start.
Use written allowances with specific dollar amounts and a defined process for approvals. If the county requires extra compliance work after demo starts, that’s a known line item, not an open-ended surprise. We give every Muscoy client a written line-item quote and written change orders before any additional work proceeds. You’ll never see a change order you didn’t approve in writing first.
If you’re planning a remodel, addition, ADU, or garage conversion in Muscoy, call (833) 467-7020. We’ll walk your property, check the county’s file on it, and give you a real number with real scope behind it. Free estimates, no pressure, just a straight answer from a team that knows this area.
Written by Nelson Ibarra, Owner at Alder Contractors, serving Muscoy and San Bernardino County since 2015.