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 Sunnyvale
Sunnyvale homeowners planning a kitchen gut, a roof replacement, or a detached ADU face a specific reality: the city’s plan review is famously exacting, and the older housing stock rarely cooperates with quick fixes. That’s where we come in. Toolbox Contractors runs full-scope remodels, additions, and outdoor structures across Sunnyvale’s 94085, 94086, 94087, and 94088 zip codes, and we know what Sunnyvale’s inspectors look for because we’ve stood across from them on dozens of permits. One contractor, every phase of the job, from the cabinets to the roof. Call us at (855) 382-3257 for a free estimate and a written line-item scope before you sign anything.
Why Toolbox Contractors Is Sunnyvale’s Preferred General Contractor Company
Sunnyvale homeowners hire us because we’re not a single-trade crew that disappears when the framing is done. We carry the full interior-to-exterior scope: kitchen and bath remodels, roof systems, windows, fencing, hardscape, and ADU builds through our partnerships with Abodu, Dvele, and Boxabl. That means you’re not coordinating a cabinet guy, a roofer, and a concrete sub on three different schedules.
Our local reputation in Sunnyvale comes from jobs completed in the 1950s-60s tract neighborhoods off El Camino Real, the Eichler-influenced pockets near the 101 corridor, and the newer two-story rebuilds spreading through the Cherry Chase and Cumberland areas. Sunnyvale customers keep our phone number because we scope for the city’s permit triggers before quoting, not after. Norm Castellano, our owner, has built the company around exactly that: pricing the full job, including the structural and drainage upgrades Sunnyvale will likely require, so the written quote holds.
A general contractor who has worked General Contractor in Sunnyvale for years understands that a “simple” roof replacement on a flat or low-slope Eichler-era home can turn into a structural review, a loading calc, and a stormwater conversation. We build those conversations into the estimate. That’s the difference between a contractor who quotes you an 8-week job and one who finishes it, inspected and signed off, in the window he promised.
Styles & brands we work with
Hire a General Contractor in Sunnyvale
Hire a General Contractor in Sunnyvale when the project touches more than one trade, and that’s nearly always. A kitchen remodel in Sunnyvale runs $14,000 – $45,000. A home addition lands between $45,000 and $130,000 depending on the lot, the foundation work, and how much the city’s impervious-surface review forces into the drainage plan. The economics here aren’t like building on an open suburban lot in a younger city. Sunnyvale’s housing stock is older, the lots are tighter, and the permit process is intentionally rigorous.
Single Contract, Every Phase
We carry the job from permit drawings through final inspection. KraftMaid or Wellborn cabinets, Cambria or Caesarstone countertops, Kohler or Moen fixtures, and the same crew managing the framing, electrical, and drywall. No finger-pointing between subs. One point of accountability.
Scoped Before You Sign
Before we quote, we walk the lot, check the existing structure, verify what the city will require, and put everything into a fixed written scope with allowances only where you choose them. You’ll see the drain line upgrade, the panel change, and the roof tie-in as line items before work starts, not as a change order halfway through.
General Contractor Services in Sunnyvale
General Contractor Services in Sunnyvale cover the full build envelope: kitchen and bath remodels, whole-home renovations, room additions, roofing, windows, fencing, pavers, and ADU construction. A garage conversion in Sunnyvale typically runs $30,000 – $80,000. An ADU build starts around $90,000 and can reach $220,000 depending on whether you’re going stick-built or prefab through our Abodu or Boxabl partnerships. Roof replacement costs $8,000 – $20,000, and that range is real: a flat Eichler-era roof with structural triggers lands at the top of it.
Interior Remodels
Kitchens, baths, whole-home guts. We install the brands you already recognize: KraftMaid, Cambria, Caesarstone, Grohe, Toto, Schluter. Material selection comes from a curated portfolio of 50+ vetted manufacturers, not a generic catalog with two options.
Exterior and Structures
Roofing through GAF, CertainTeed, and Owens Corning credentialing, James Hardie siding, PGT and CGI impact windows, Belgard and Unilock hardscape, and fences built from Master Halco or Jerith systems. The same General Contractor team that frames your ADU can pour your paver driveway and re-roof the house in the same permit cycle.
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.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Sunnyvale
Sunnyvale homeowners don’t want a contractor who pushes whatever the supply house had on the shelf that week. We source and install from 50+ nationally recognized brands because the material spec is part of what you’re paying for. For ADU and prefab structures, our partnerships with Abodu, Dvele, and Boxabl let us offer factory-built options that most general contractors in the area simply can’t. On concrete and site work, we use Quikrete, Sakrete, and Oldcastle products, and we stage them locally for Sunnyvale jobs so material isn’t sitting in a yard in San Bernardino while your pour window closes. Fast turnaround on the brands Sunnyvale homeowners already plan around.
See the difference
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After
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After
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AfterCommon General Contractor Problems We See in Sunnyvale Homes
- Flat and low-slope Eichler-era roofs hiding structural deficiencies. The original 2×6 rafters and shallow drainage paths were never designed for today’s stormwater rules. A re-cover that would pass in a neighboring city often triggers a structural tie-in and re-pitched drainage here.
- Knob-and-tube and early aluminum wiring in 1950s-60s tract homes. A kitchen remodel almost always exposes wiring that predates the panel’s current amperage. We price the panel upgrade and rewire into the scope before the walls open up.
- Non-permitted prior additions on older lots. Sunnyvale’s plan review catches them. If you’re adding on and the existing square footage wasn’t permitted, the city will fold that into the same permit. We run title and permit history during the estimate, not after.
- Stormwater and impervious-surface triggers on additions and hardscape. A paver driveway or a larger addition changes the lot’s runoff profile, and Sunnyvale enforces it. We include the drainage design and any permeable-surface work in the quote so the number you sign is the number you pay.
Pricing for General Contractor in Sunnyvale, CA
Here’s what Sunnyvale homeowners actually pay, based on the work we’ve scoped and built across the city. A home addition lands between $45,000 and $130,000, an ADU between $90,000 and $220,000, and a garage conversion between $30,000 and $80,000. Driveway replacement runs $5,000 – $14,000, and a full roof replacement is $8,000 – $20,000. The range exists because Sunnyvale lots differ: an Eichler-era flat roof in 94087 carries structural and drainage requirements that a straightforward gable roof in a newer 94086 subdivision does not. Ages of the wiring, the panel, the foundation, and the lot’s drainage path all move the number. Call (855) 382-3257 and we’ll send a scoped, written estimate with fixed numbers and named allowances, free.
| Project Type | Typical Sunnyvale Range |
|---|---|
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Garage Conversion | $30,000 – $80,000 |
| Driveway Replacement | $5,000 – $14,000 |
| Roof Replacement | $8,000 – $20,000 |
Building on open acreage around Sunnyvale costs more than an infill remodel quote suggests, and the difference is structural, not mark-up. County permitting, septic and well setbacks, longer material hauls, and equipment access on a lot without established site utilities all move the price. We scope those before we quote, so the first number you see reflects the actual job.
We Also Serve Cities Near Sunnyvale
Our crews work Sunnyvale and the surrounding South Bay daily, including Mountain View, Santa Clara, Loyola, and Cupertino. If your project is in one of those neighboring cities, the same scoping process and brand partnerships apply. Call (855) 382-3257 and tell us the address. We’ll tell you which city’s permitting rules will govern the job and how that affects your estimate.
Serving Sunnyvale, CA — Our Local Coverage Area
We’re based in the Sunnyvale 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 Sunnyvale
Because the site work is a different job entirely. An acreage build outside Sunnyvale’s city core typically runs through county permitting with septic and well setbacks, longer material hauls, and grading and drainage on an open lot that no infill quote accounts for. A home addition on acreage can start around $45,000 but easily reaches into the $130,000 range once equipment access, utility tie-ins, and stormwater control are scoped. We price those as named line items before you sign. Call (855) 382-3257 for a scoped quote.
We price the structure, the site work, and the utility tie-ins separately, then give you one fixed number with named allowances only where you request them. A detached ADU runs $90,000 – $220,000 depending on whether you go stick-built or prefab through Abodu or Boxabl. Septic or well setbacks, trenching for power, and a dedicated access path for the excavator are part of the quote from the first number. Estimates are free.
As soon as the city’s impervious-surface review gets involved. The original 2×6 rafters and shallow drainage on many 1950s-60s Eichler-influenced roofs can’t handle current loading or stormwater calculations. If we open the roof and find undersized framing, as we did on a low-slope ranch off the older Sunnyvale tracts, the permit triggers a structural tie-in and re-pitched drainage. That gets scoped into the written quote with clear allowances before the first board comes off. Call (855) 382-3257 for an exact number.
Fixed numbers wherever the scope is fixed. On a Sunnyvale addition, we fix the structural work, the drainage, the framing, the roofing, and the finishes into a written line-item scope, then hold the concrete and exterior schedule to the November – March wet season window so the framing stays dry before inspection sign-off. Allowances appear only where you’ve chosen a finish tier that hasn’t been finalized, and we walk you through each one before you sign. Call for a free written quote.
It dictates which phases run when. Sunnyvale’s dry season is long, but the concentrated winter rains mean we sequence concrete pours, stucco, and roofing to keep framing dry before inspection sign-off. On acreage lots, we also plan for where water leaves the site during grading, because standing water during a wet-window pour will fail inspection. We build the calendar into the estimate, not around it. Call (855) 382-3257 to scope your project.
Ready to get a real number for your Sunnyvale project? Call (855) 382-3257 and ask for Norm. We’ll walk the lot, run the permit triggers, and give you a written scope with fixed numbers. Free estimate, no obligation, and one contractor from the first permit drawing to the final inspection.
Written by Norm Castellano, Owner at Toolbox Contractors, serving Sunnyvale and the South Bay.