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 San Martin
Finding a general contractor in San Martin who understands unincorporated Santa Clara County means looking for two things at once: someone who can manage multi-trade construction, and someone who knows the county’s permitting process better than most homeowners do. We’re Iron Beam Contractors, led by Nolan Driscoll. Our General Contractor team has run projects across the 95046 corridor long enough to know that a San Martin project rarely starts with a hammer. It starts at the county planning desk. If you’re planning a home addition, ADU, garage conversion, or roof replacement on a multi-acre parcel, call (833) 756-5936 for a free estimate and a straight answer about what your property actually needs.
Why Iron Beam Contractors Is San Martin’s Preferred General Contractor Company
We earned our name in rural Santa Clara County by doing the unglamorous work first: reading parcel maps, checking well and septic records, and sequencing permits before a single subcontractor steps on site. San Martin homeowners don’t have a city hall to call. They have a county office, and the county plan check on a multi-acre parcel often asks for more than a builder’s basic quote covers. We plan for that from day one.
Nolan Driscoll built this company around a simple rule: the person who signs your contract should be the person who knows what’s in your file. That’s why our quotes for San Martin work include a written scope that names the load-bearing details, the wind and seismic ratings, and the permit paperwork we’ll pull. No change-order surprises after plan check. No “we’ll figure out the septic later.” Our reputation here is built on documents, not just drywall.
Response time matters, but so does showing up prepared. When a San Martin homeowner calls about a garage conversion or a barn-to-shop remodel, we’re already asking the right questions: Is the existing structure permitted? What’s the well capacity? Is the septic field inside the proposed building envelope? That local knowledge saves weeks on the front end of a project.
Styles & brands we work with
Hire a General Contractor in San Martin
Hire a General Contractor for your San Martin project when the job touches more than one trade, or when the county’s plan check will demand documentation that a single-trade specialist can’t produce. On multi-acre parcels here, that’s nearly every meaningful project. A home addition in San Martin typically runs $45,000 to $130,000. An ADU runs $90,000 to $220,000. A garage conversion lands between $30,000 and $80,000. Those numbers assume someone is managing well, septic, and grading approvals alongside the structural work.
Rural Parcel Remodels and Additions
San Martin additions often mean extending a ranch home on a lot where the septic leach field sits uncomfortably close to the proposed footprint. We sequence the county approvals first: well capacity, septic clearance, grading. Then framing. The paper trail is half the project.
Accessory Structure Conversions
Barns, shops, and detached garages are common conversion targets here. But many of them were built without permits decades ago. We start every conversion with a records search and a structural assessment, because the county will ask for both before we touch a wall.
General Contractor Services in San Martin
General Contractor Services in San Martin cover one accountable contract for everything from foundation to roofline, including the outdoor work that rural properties demand. That means we manage interiors, exteriors, hardscape, and prefab or ADU installation under a single point of contact. A roof replacement here runs $8,000 to $20,000. Impact window installation spans $8,000 to $25,000. We don’t broker the work to a chain of disconnected subs and call it a day. We run the job.
Interior and Whole-Home Remodeling
Kitchens, bathrooms, and whole-home remodels on older San Martin ranch homes require working around existing framing that wasn’t built to modern seismic or wind standards. We open walls, document what’s there, and bring load paths up to current county requirements before we close them back up.
Exterior Envelope and Outbuildings
Roofing, siding, windows, and fencing on large-lot properties means wind exposure is real. We specify products from GAF, CertainTeed, and Owens Corning, and we document the wind ratings so your insurance file stands up later.
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.
Trusted Brands We Service in San Martin
We carry and install a defined portfolio of manufacturer lines selected for San Martin’s specific conditions. For roofing, that means GAF, CertainTeed, Owens Corning, and IKO systems rated for the valley’s wind and fire-season exposure. We don’t stock generic four-inch gutters and call it premium. We order the rated material, stage it on your parcel, and track the manufacturer’s install specs as part of our construction documentation. That matters when a storm tears through and your insurance adjuster asks for proof the roof was installed to manufacturer standard. We hand them the file.
See the difference
Before
After
Before
After
Before
AfterCommon General Contractor Problems We See in San Martin Homes
- Unpermitted outbuildings surface at plan check. A detached barn or shop built in the 1970s without county records becomes a problem the moment you apply for an addition permit. The county asks about the entire parcel, not just the new footprint.
- Well and septic approvals gate the schedule. You can frame a wall in a week, but a septic clearance from Santa Clara County can take longer. Quotes that ignore this slip the draw schedule before framing ever starts.
- Expansive clay soils move with seasonal moisture. San Martin’s clay shrinks in summer and swells with winter rain. Foundation and grading work has to account for that movement or you’ll see cracks in the first two years.
- Wind-load documentation is missing on older structures. South valley winds hit barns, shops, and single-story ranches differently than urban infill. Without load paperwork, an insurance claim after storm damage gets harder to prove.
Pricing for General Contractor in San Martin, CA
Here is what we quote for common San Martin projects. These are installed ranges, not materials-only numbers from a big-box aisle. They assume a compliant scope with the county permit and documentation work included.
| Project | San Martin Range |
|---|---|
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Garage Conversion | $30,000 – $80,000 |
| Roof Replacement | $8,000 – $20,000 |
| Impact Window Installation | $8,000 – $25,000 |
What drives the spread on a San Martin job is rarely the materials. It’s the parcel. Septic clearance, well capacity, grading, and unpermitted structure discovery all move the number. We give you a written line-item quote before we start, so none of that shows up as a surprise. Call (833) 756-5936 to schedule a free estimate on your property.
We Also Serve Cities Near San Martin
Our crews work throughout the South Valley, from General Contractor in San Martin down through Morgan Hill and Gilroy, and west toward Amesti and Corralitos. If your property sits on the edge of the 95046 boundary or straddles a county line, call us and we’ll confirm coverage before you commit to anything.
Serving San Martin, CA — Our Local Coverage Area
We’re based in the San Martin 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 San Martin
They can stop a permit application cold. When Santa Clara County plan check reviews your parcel, they look at the entire property, not just the proposed new square footage. If an existing barn, shop, or addition has no records, the county may require you to bring that structure to code or resolve its status before they’ll release your new permit. We run a records search before quoting so you know what you’re walking into. Call (833) 756-5936 and we’ll pull the file for you.
We typically respond to San Martin inquiries within one business day. If your project has already hit a permit snag, tell us upfront and Nolan Driscoll will review the specifics personally.
Yes. We work across the full 95046 area, from the parcels off Llagas Road to the ranches along Santa Teresa Boulevard and everywhere in between. We know the county roads and the gate codes well enough to sequence deliveries without holding up your job.
Not necessarily, but rural parcel costs work differently. Morgan Hill and Gilroy have more suburban infill, so grading and septic costs are lower. In San Martin, multi-acre lots add well, septic, and driveway access work that city-lot projects don’t carry. Our range stays honest because we scope those variables upfront, not halfway through framing.
We provide a written workmanship warranty on completed projects, and we back it with the compliance documentation the county requires. If an insurance claim comes up later, you’ll have the wind-load and seismic records to support it. That paper trail is part of the job, not an add-on.
Written by Nolan Driscoll, Owner at Iron Beam Contractors, serving San Martin and the South Valley.