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 Jose
Hiring a general contractor in San Jose means finding someone who actually understands what this city’s building department, soil conditions, and aging housing stock demand. We’re Toolbox Contractors, led by Norm Castellano, and we run full-scope remodels, additions, ADUs, roofs, windows, and exterior work across San Jose with one contract and one point of accountability. If you’re planning a kitchen gut in Willow Glen, a Naglee Park addition, or a backyard ADU near Seven Trees, call (855) 382-3257 for a free estimate. We know the seismic and wind-uplift requirements here, and we document every strap, anchor, and inspection sign-off so your project holds up when it matters.
Why Toolbox Contractors Is San Jose’s Preferred General Contractor Company
San Jose homeowners hire us because we handle the full scope from cabinets to the roof without handing you off to three different subs. Norm Castellano built Toolbox Contractors around a simple idea: one crew, one warranty, one person you can call when something needs fixing. Our General Contractor team carries that through every job, whether it’s a bathroom overhaul in Buena Vista or a whole-home rebuild near Communications Hill.
The reviews from San Jose customers tell the same story: we show up when we say we will, we pull permits the right way, and we don’t disappear when the inspector asks for a revision. San Jose’s planning process is detailed, and we’ve been through it enough times to quote jobs accurately the first time. We know which San Jose neighborhoods trigger historic-character review, which lots sit on shrink-swell clay, and which older homes hide knob-and-tube wiring behind the walls. That local knowledge is the difference between a bid that holds and one that falls apart halfway through demolition.
Response time matters when you’re trying to lock in a contractor during San Jose’s busiest building seasons. We schedule estimates across San Jose within days, not weeks, and our crews work across 95103, 95106, 95108, and 95109 regularly. You’ll get a written, line-item quote, not a handshake and a vague number.
Styles & brands we work with
Hire a General Contractor in San Jose
Hire a General Contractor in San Jose when your project spans more than one trade or touches anything structural, seismic, or permit-heavy. That’s where we come in. A kitchen remodel in San Jose runs $16,520 – $53,100, and a bathroom remodel runs $10,620 – $33,040. A home addition runs $53,100 – $153,400, and an ADU runs $106,200 – $259,600. Those ranges reflect what we see across San Jose neighborhoods after accounting for local permit fees, seismic detailing, and the cost of working on tight lots next to occupied homes.
Whole-Home and Structural Scope
When a San Jose homeowner buys a mid-century ranch or a century-old Craftsman and wants to change the floor plan, the job touches framing, electrical, plumbing, HVAC, and often foundation work. We manage all of it under one contract. No chasing electricians. No arguing with the roofer about whose fault the leak is.
ADU and Tight-Lot Builds
San Jose’s ADU boom means we’re regularly building on lots where the neighbor’s project is underway at the same time. We sequence the work, coordinate inspections, and keep a written draw schedule so change orders don’t pile up when the city’s inspection calendar gets backed up.
General Contractor Services in San Jose
General Contractor Services in San Jose cover the full interior-to-exterior scope most homeowners need when they’re improving a property rather than just swapping a fixture. We remodel kitchens and bathrooms, build additions and ADUs, replace roofs and windows, and handle fencing, hardscape, and siding. A roof replacement in San Jose runs $9,440 – $23,600. Impact window installation runs $9,440 – $29,500. A garage conversion runs $35,400 – $94,400.
Interior Remodeling
Kitchens, bathrooms, whole-home updates, and basement finishing all fall under what we do daily. We install KraftMaid and Wellborn cabinets, Cambria and Caesarstone countertops, and Kohler or Moen fixtures. The materials come from our curated portfolio of 50+ vetted brands, so you’re not stuck picking from a generic big-box catalog.
Exterior and Envelope Work
Roofs, windows, siding, fencing, and hardscape are part of the same contract. We’re certified to install GAF, CertainTeed, and Owens Corning roofing systems, and we carry window lines like PGT and CGI that meet coastal and high-wind ratings. James Hardie siding rounds out the building envelope so the whole exterior works as one system.
What happens when you call
- 1
A real person answersNo phone trees — you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in San Jose
San Jose homeowners recognize brand names, and we stock and install the ones that matter. For roofing, we’re authorized for GAF and CertainTeed systems, plus Tamko and Boral options where the job calls for them. For windows, PGT and CGI impact-rated lines are common on San Jose homes that want wind-uplift documentation for insurance. We keep parts and materials flowing for San Jose jobs without the supply-chain delays that stall projects mid-build. That means your Cambria slab, your PGT window order, and your Owens Corning shingle delivery are tracked by one team, not five.
See the difference
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After
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After
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AfterCommon General Contractor Problems We See in San Jose Homes
- Knob-and-tube wiring and galvanized supply lines in pre-1960 homes. The older core around downtown San Jose and neighborhoods like Naglee Park hides these behind walls. You won’t know until we open them, and a good quote accounts for that risk instead of pretending it’s not there.
- Shrink-swell clay under Santa Clara Valley slabs. San Jose’s clay soils expand and contract with moisture. We see foundation cracks and grading failures on sloped lots near the foothills, especially after an atmospheric-river storm pushes water toward the house.
- Historic-character review on Willow Glen and Naglee Park rebuilds. A tear-down rebuild in these neighborhoods has to match surrounding character to survive city review. That means planning time, design revisions, and a contractor who doesn’t panic when the hearing calendar stretches.
- Missing seismic tie-down and wind-uplift documentation. Too many San Jose remodels get done with the right materials but no photo documentation of straps, anchors, and uplift ratings. That paper is what an insurance claim needs later.
Pricing for General Contractor in San Jose, CA
San Jose’s construction market runs higher than inland cities because land is scarce, permits are detailed, and seismic compliance adds real labor hours. Here’s what we quote for common scopes:
| Project Type | Typical San Jose Range |
|---|---|
| ADU Construction | $106,200 – $259,600 |
| Home Addition | $53,100 – $153,400 |
| Impact Window Installation | $9,440 – $29,500 |
| Roof Replacement | $9,440 – $23,600 |
| Garage Conversion | $35,400 – $94,400 |
What moves the number? Seismic detailing on structural walls, historic review requirements in Willow Glen or Naglee Park, access constraints on tight lots, and whether you’re replacing knob-and-tube or galvanized plumbing while the walls are open. We write every quote as a line-item breakdown so you see exactly what a compliant job costs versus what a low bid quietly leaves out. Call (855) 382-3257 for a free estimate, and we’ll walk you through the numbers in plain English.
We Also Serve Cities Near San Jose
Toolbox Contractors runs crews throughout San Jose and the surrounding communities. You’ll find us working in Buena Vista, Seven Trees, Communications Hill, and Alum Rock on a regular basis. If your project sits just outside the city line, call us anyway – we’re likely already working a few blocks away.
Serving San Jose, CA — Our Local Coverage Area
We’re based in the San Jose 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 Jose
San Jose’s building code enforces wind-uplift ratings through its adoption of California’s Title 24 and the local amendments that apply to roof and window assemblies. The inspector verifies the product rating at rough-in or final inspection, and the manufacturer’s installation details become part of the permit record. It’s not optional marketing: if your roof or window assembly doesn’t meet the rated uplift for your exposure zone, the inspector flags it. We document every rated product we install, including PGT and CGI windows and GAF, CertainTeed, or Owens Corning roofing, so the compliance paper exists before the walls close. Call (855) 382-3257 and we’ll check your address against the local wind zone before we quote.
A San Jose general contractor quote needs line-item scope, materials with brand and model, permit fees, and a written draw schedule tied to inspection milestones. After the work is done, the documentation package should include permit sign-offs, inspection reports, and photos of seismic straps, anchors, wind-uplift connectors, and any waterproofing details. That’s the paper an insurance adjuster asks for after an atmospheric-river storm or a seismic event. We build that documentation into every San Jose job as standard, not as an add-on. Call (855) 382-3257 for a quote that includes the paper trail.
A rebuild in Willow Glen or Naglee Park triggers San Jose’s historic-character review, which means design drawings go through planning staff and sometimes public hearings before a building permit is issued. The house has to match surrounding character in massing, setbacks, and often materials. That planning time costs money, and a contractor who quotes a rebuild in those neighborhoods without accounting for it has underbid the job. We’ve been through enough of these hearings to time the process accurately. Call (855) 382-3257 if you’re considering a rebuild in a character district, and we’ll tell you what the review calendar actually looks like.
A San Jose permit creates a public record that the work met the code in effect at the time, and it’s the first thing an insurance company or a future buyer asks for. Unpermitted work can void a claim, stall a sale, or force you to open walls later. The permit also triggers inspections that catch things like missing seismic anchors or undersized headers before they get buried. We pull permits on every San Jose job and we don’t close a wall until the inspector signs off. Call (855) 382-3257 to talk about what your specific project needs.
A compliant San Jose ADU or addition quote includes seismic engineering, lateral bracing, Title 24 energy calculations, permit and impact fees, a written draw schedule, and a line-item allowance for each material category. A low bid often leaves out the engineering, the energy compliance, or the inspection sequencing, then hits you with change orders once the job is underway. We write all of it into the quote so you’re comparing apples to apples. Call (855) 382-3257 and we’ll walk you through a sample quote line by line.
Written by Norm Castellano, Owner at Toolbox Contractors, serving San Jose.