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
Finding a competent General Contractor for acreage work in Sunnyvale means navigating a patchwork of county and city requirements most remodelers never see. We handle both. Ashford Contractors brings full-scope capability to oversized lots, older ranches, second-story additions, and detached ADUs across zip codes 94085, 94086, 94087, and 94088. One call to (877) 752-3868 gets you a contractor who can manage permits, grading, seismic retrofits, and every interior and exterior scope without you coordinating six different subs.
Why Ashford Contractors Is Sunnyvale’s Preferred General Contractor Company
Sunnyvale homeowners keep our number because we understand the area’s split personality: dense Silicon Valley infill on one block, and a 1950s rancher on an oversized county-adjacent lot on the next. That range demands a contractor comfortable with Title 24 energy calcs, seismic shear-wall requirements, and the kind of long material hauls and equipment access that larger open lots create. We’re led by Glen Mossier, who built the company around a simple principle: one contract, one project manager, one accountable voice from the roofline to the foundation.
Our reputation across Sunnyvale and nearby Mountain View, Santa Clara, Loyola, and Cupertino comes from work that actually passes inspection the first time. We don’t cut corners on the things inspectors scrutinize here: anchor bolts, shear panels, energy calculations, drainage. The result is fewer punch-list items and fewer calls back. Homeowners on oversized lots around Hollenbeck Avenue, Remington Drive, and Dartshire Way regularly see our trucks because we schedule aggressively and show up when we say we will.
Styles & brands we work with
Construction Company in Sunnyvale
Construction Company work on Sunnyvale acreage properties is a different animal than tract-home remodels, because the lot itself drives engineering decisions before a hammer ever swings. Septic and well setbacks from Santa Clara County can force a building footprint into a corner of the lot the homeowner never considered. Long material hauls from Bay Area suppliers add logistics time. Open-lot grading and drainage affect foundation design. We scope all of these before quoting, so your number holds.
Permit and Site Scoping
City of Sunnyvale handles building permits inside city limits, but acreage parcels with wells or septic systems pull Santa Clara County into the conversation. We map both jurisdictions for you. The home addition cost range in Sunnyvale runs $45,000 to $130,000, and a big chunk of that variance is site prep: engineered fill, retaining walls, and bringing utilities across a larger lot.
Full-Scope Build Capability
Because Ashford is a full-scope contractor, we don’t sub out the critical path. A detached ADU or garage conversion on your property can include roofing, hardscape for a new driveway approach, fencing, and interior finish under the same contract. That single-point accountability is what makes projects on open lots actually finish on schedule.
Remodeling Contractor in Sunnyvale
Remodeling Contractor work in Sunnyvale often means opening up a 1950s ranch or Eichler-style home with slab-on-grade foundations, shallow roof pitches, and original galvanized plumbing that has quietly been failing for years, which is why homeowners search for ViewLux repair in Sunnyvale when those systems need attention. Homeowners typically call us when they want a second-story addition on an oversized lot, a full kitchen reconfiguration, or a permitted ADU behind the main house. The work costs real money here: a kitchen remodel in Sunnyvale typically runs $14,000 to $45,000; a home addition starts around $45,000 and can reach $130,000 depending on scope.
Seismic and Title 24 Upgrades
Older Sunnyvale homes need seismic bolting and shear-wall work to pass inspection on any substantial remodel. Title 24 energy requirements apply to nearly every project. We plan these into the quote, not as change orders after demo starts. Homeowners avoid nasty surprises when the framing inspector asks for calcs you actually have.
Acreage Remodel Priorities
On larger parcels, we sequence work around the wet season. Sunnyvale’s mild climate lets us build year-round, but the concentrated rain months from late fall through spring make roofing, waterproofing, and dry-in the critical path. We schedule open-lot projects with that weather window in mind, because exposed framing and rainfall don’t mix.
Trusted Brands We Service in Sunnyvale
We work with manufacturers homeowners in Sunnyvale actually ask for by name, and we can source the full roster across every product category. On the hardscape and exterior side, we use Belgard, Techo-Bloc, and Unilock for driveways and patios, plus Barrette and Master Halco for fencing. On interiors, KraftMaid and Wellborn cabinetry, Cambria and Silestone countertops, and Kohler and Toto plumbing fixtures. James Hardie siding, GAF and CertainTeed roofing, Therma-Tru doors. One contract, one accountable partner, professional-grade materials, and we coordinate delivery to your Sunnyvale site so you’re never waiting on a missed truck.
See the difference
Before
After
Before
After
Before
AfterCommon General Contractor Problems We See in Sunnyvale Homes
- Septic and well setbacks force redesigns. We see homeowners buy an oversized lot assuming they can build anywhere, then discover the county setback line cuts the buildable area by a third. We verify setbacks before you commit to a footprint.
- Slab-on-grade foundation issues. 1950s and 60s ranchers in 94086 and 94087 often sit on slabs that have settled or cracked. A remodel that ignores the foundation just transfers the problem up into new framing.
- Original single-pane glazing and galvanized plumbing. Title 24 compliance means those old windows and pipes typically can’t stay. We price replacement into the quote from day one, not as a surprise mid-project.
- Poor open-lot drainage leading to water intrusion. On acreage, a poorly graded addition or ADU sends water toward the existing house. We engineer grading and drainage as part of the build, not as an afterthought.
Pricing for General Contractor in Sunnyvale, CA
General contractor pricing in Sunnyvale reflects the site as much as the square footage. A home addition on an oversized lot runs $45,000 to $130,000. ADU construction in Sunnyvale runs $90,000 to $220,000 depending on size, site work, and finishes. Garage conversions range from $30,000 to $80,000. Septic and well setback reviews, grading, drainage, and county permit coordination add cost that a tract-home bid never accounts for. We give written line-item quotes after walking your specific lot. Call (877) 752-3868 to schedule a free estimate and get real numbers for your property.
| Project | Sunnyvale Cost Range |
|---|---|
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Garage Conversion | $30,000 – $80,000 |
We Also Serve Cities Near Sunnyvale
Ashford Contractors runs crews into Mountain View, Santa Clara, Loyola, and Cupertino on a regular basis. If your property sits near the Sunnyvale border or extends into county jurisdiction, we can still handle the full scope. Our Sunnyvale clients get the same single-contractor accountability whether the job is a second-story addition on a rancher or a detached ADU on open acreage.
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
You typically need both. The City of Sunnyvale issues the building permit for the ADU structure, but if your property has a well or septic system, Santa Clara County also reviews setbacks and environmental health requirements. We pull both jurisdictions’ permits and coordinate the overlap so you don’t get caught between agencies. Call (877) 752-3868 for a free site review of what your specific lot requires.
Setbacks can shrink your buildable footprint significantly, sometimes by 30 percent or more on smaller acreage parcels. The county requires minimum distances between any new structure and existing well heads or septic leach fields. We verify those lines during initial scoping, before you pay for design work, so your ADU or addition is engineered to fit the actual buildable area. Estimates are free.
ADU construction in Sunnyvale typically runs $90,000 to $220,000. The spread reflects site conditions on your lot: grading, drainage, utility trenching distance, and whether you choose a prefab system from a partner like Abodu or Dvele versus stick-built. We itemize every cost driver so you see where the money goes. Call (877) 752-3868 for a written line-item quote.
We engineer the lot before we pour. That means shooting grades, designing swales or French drains where the soil needs it, and ensuring the finished pad slopes away from both the new structure and the existing house. Sunnyvale’s wet season makes this non-negotiable. A project that skips grading becomes a water problem the first winter after completion. We include drainage in every acreage quote.
The biggest cost drivers on acreage are site access and prep: long material hauls, equipment staging, utility extension, seismic upgrade work on the existing structure, and any required grading or retaining. A simple second-story addition on a 94087 rancher can run $45,000 to $130,000 depending on how much of that prep applies. We walk your lot before quoting so the number reflects reality, not a generic square-foot price.
Written by Glen Mossier, Owner at Ashford Contractors, serving Sunnyvale and the surrounding Bay Area.