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 Gilroy
General contractor work in Gilroy runs the full range: a $14,000 kitchen remodel, a $90,000 ADU on acreage off Hecker Pass Highway, or a full gut of a 1900s farmhouse downtown. The price depends on where the property sits, because land inside city limits follows Gilroy’s building department while unincorporated parcels fall under Santa Clara County. That distinction changes permitting, septic and well setbacks, grading, and sometimes the entire construction schedule. Norm Castellano and the Toolbox Contractors team have worked both sides of that line. If you’re planning a project anywhere in the 95020 or 95021 zip codes, call (855) 382-3257 and we’ll tell you exactly what applies to your parcel before you spend a dollar on drawings.
Why Toolbox Contractors Is Gilroy’s Preferred General Contractor Company
Gilroy homeowners don’t need five specialists for one project. They need one accountable General Contractor who can handle the kitchen, the roof, the windows, and the detached ADU under the same contract. That’s what we do. Homeowners here talk to us because we name the materials we install: Cambria countertops, KraftMaid cabinets, GAF roofing, PGT windows. It matters when you’re writing a check for $60,000 and you want to know exactly what’s going into your house.
Our work across Gilroy spans the old downtown core with its knob-and-tube wiring and unreinforced masonry, the mid-century tracts, and the newer subdivisions along the city’s edges. Local knowledge changes how we bid: a kitchen remodel in a 1920s bungalow on Sixth Street carries different risks than a bath remodel in a 2005 home near Christmas Hill Park. We price accordingly, with line-item written quotes so you can see every cost before signing. Norm Castellano built Toolbox Contractors to be the contractor he’d want on his own property: direct, specific, and on-site enough to know the difference between a $2,000 countertop and a $6,500 one.
Styles & brands we work with
Residential General Contractor in Gilroy
Residential General Contractor work in Gilroy means more than swinging hammers. It means knowing when a project needs a county variance, when a roofline has to meet WUI fire code, and when a foundation pour should happen at 6 a.m. to beat the valley heat. A typical kitchen remodel here runs $14,000 to $45,000, a bathroom $9,000 to $28,000, and a full home addition $45,000 to $130,000. The older the home, the more you’ll spend on the things you can’t see: rewiring, repiping, seismic bolts, and sometimes structural correction before finish work ever starts.
Kitchen and Bath Remodels
We install what Gilroy homeowners actually ask for: Cambria or Caesarstone countertops at $2,000 to $6,500, KraftMaid or Wellborn cabinets at $4,000 to $13,000, and Kohler or Moen fixtures rather than big-box substitutes. If you’re doing a small kitchen in a 1960s ranch near Gavilan College, budget $9,000 to $20,000. A primary bath with a walk-in shower runs $4,500 to $12,000 for the shower line item alone.
Roofing and Exterior Envelope
Hot, dry summers and wildfire risk at the city’s edges mean Gilroy roofs take a beating. We’re certified to install GAF, CertainTeed, and Owens Corning systems, and a full replacement typically runs $8,000 to $20,000 here. Homes in the WUI zones east of town need fire-rated assemblies, and we scope that into the quote from day one, not as a change order later.
Hire a General Contractor in Gilroy
Hire a General Contractor in Gilroy when the project touches more than one trade. A kitchen remodel that also needs a roof, a patio, and a fence is where Toolbox Contractors works best: one contract, one point of accountability, no finger-pointing between subs. Our full-scope model covers interior remodeling, exterior upgrades, hardscape, and ADU or prefab construction through partnerships with Abodu, Dvele, Boxabl, and Plant Prefab. A garage conversion in Gilroy runs $30,000 to $80,000, while a detached ADU starts around $90,000 and can reach $220,000 depending on site conditions and finish level.
ADU and Prefab Construction
Santa Clara County has made ADUs a priority, and Gilroy homeowners are taking advantage. On acreage properties, though, the county’s septic and well setbacks often dictate where the ADU can sit, not where you’d prefer it. We’ve scoped ADUs on parcels off Hecker Pass Highway where the leach field forced a full redesign. Budget timeline and cost for those conditions before you commit.
Additions and Garage Conversions
A room addition on a city lot is straightforward. A room addition on a two-acre parcel in the county is a different job: longer material hauls, equipment access issues, and grading plans for drainage. We handle both, and we’ll tell you which one you’re dealing with after the first site visit. Home additions in Gilroy run $45,000 to $130,000; garage conversions $30,000 to $80,000.
Trusted Brands We Service in Gilroy
We work with over 50 vetted material brands because a Gilroy homeowner shouldn’t be stuck choosing from a generic catalog. On the roofing side, we’re certified for Tamko and Boral systems alongside GAF and CertainTeed, giving you real warranty-backed options. For windows and doors in a valley that gets serious summer heat, we install PGT and CGI impact-rated products that hold up to both sun and wind. And for countertops, you’re not limited to one slab yard; we source Cambria, Silestone, and Caesarstone. When a Gilroy client calls, we can usually have brand samples in hand within days, not weeks.
See the difference
Before
After
Before
After
Before
AfterCommon General Contractor Problems We See in Gilroy Homes
- City permits assumed on county land. A homeowner starts design work, hires a contractor, and only then discovers the property falls under Santa Clara County jurisdiction. That triggers septic and well setback reviews that can add weeks to the design phase, and sometimes stop-work orders if work began before the county signed off.
- Knob-and-tube wiring and unreinforced masonry in the downtown core. Homes built before 1950 around downtown Gilroy often need full electrical replacement and seismic retrofitting before any remodel work can pass inspection. We scope for that up front, because discovering it mid-demo is a budget killer.
- Material hauls and equipment access on rural lots. Parcels off Hecker Pass Highway or west of Highway 101 can have long driveways, tight gate clearances, and no room for a full-size concrete truck. That changes pump costs, crane reach, and sometimes which materials make sense. We plan for it in the quote, not as a surprise line item later.
- Grading and drainage on open acreage. A foundation that looks fine in September can sit in a foot of water by January. Gilroy’s winter rains expose drainage problems fast, and failing inspection after the first storms means rework. We walk the lot before quoting and build drainage into the scope when the property needs it.
Pricing for General Contractor in Gilroy, CA
Here’s what we’re seeing in Gilroy right now, based on current material costs and local labor rates:
| Project Type | Gilroy Market Range |
|---|---|
| ADU Construction | $90,000 – $220,000 |
| Home Addition | $45,000 – $130,000 |
| Garage Conversion | $30,000 – $80,000 |
What moves these numbers? For ADUs on acreage, septic system redesigns and well setbacks are the biggest variables. A new leach field can cost $15,000 to $30,000 before you’ve poured a single yard of concrete, depending on soil percolation and county requirements. For additions, the condition of the existing foundation and how much structural correction the older home needs drive the price. Every quote we write is line-item, fixed-price, with no change orders unless the scope itself changes. Call (855) 382-3257 to schedule a free site walk and get real numbers for your specific property.
We Also Serve Cities Near Gilroy
Toolbox Contractors covers the full South County area. We work in San Martin and Morgan Hill, out toward Aromas and San Juan Bautista, and across unincorporated Santa Clara County. If you’re on acreage anywhere in the 95020 or 95021 zip codes or just beyond the city line, call (855) 382-3257 and we’ll come out to look.
Serving Gilroy, CA — Our Local Coverage Area
We’re based in the Gilroy 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 Gilroy
They can move your ADU footprint entirely. Santa Clara County requires setbacks from septic tanks, leach fields, and wells before any foundation work begins. On a two-acre parcel off Hecker Pass Highway, we scoped a detached ADU and shop building where the existing leach field sat squarely in the proposed footprint. We brought in a civil engineer to redesign the drain field location, which required a county variance and pushed the foundation start by six weeks. That’s a real timeline and a real cost. Call (855) 382-3257 and we’ll check your parcel before you finalize drawings.
Site preparation and permitting, not the structure itself. Long driveway pours, grading for drainage, power upgrades from the street, and county environmental health reviews for septic and wells often add $30,000 or more to a project before framing starts. Material hauls add cost too: a boom lift or extended-reach crane on a rural lot costs more than a standard urban delivery. We itemize every one of these line items in the quote so you see exactly where the money goes.
Yes, if your property sits in one of the wildfire-risk zones at the city’s edges, typically east toward the hills or west into the open range. Santa Clara County and the city both enforce WUI (Wildland-Urban Interface) requirements for roofing assemblies, vents, siding, and defensible-space clearing. We specify Tamko or Boral fire-rated roofing, fire-resistant underlayment, and ember-resistant vents when the code applies to your parcel. We’ll verify your zone during the estimate.
We pull county permits through Santa Clara County, not the city of Gilroy, when the parcel is outside city limits. That means coordinating with county environmental health for septic and well approval, county building for structural permits, and sometimes the fire marshal for WUI compliance. Our team handles the full submittal package, responds to plan review comments, and keeps the schedule realistic. We don’t let you break ground before the county signs off, because a stop-work order on a rural lot is expensive in both time and money.
Expect to open up walls and find things you didn’t plan for. Early-1900s downtown Gilroy homes commonly have knob-and-tube wiring, cast-iron plumbing, and foundations with unreinforced masonry. A kitchen remodel can turn into a full electrical replacement and seismic retrofit once the walls come down. We plan for that in the quote: we include a contingency line for electrical and structural correction, and we show you the inspection reports as they come in. You won’t get a surprise change order; you’ll get a documented reason for any added scope. Call (855) 382-3257 for a free walk-through of your property.
Written by Norm Castellano, Owner at Toolbox Contractors, serving Gilroy and the South County area.