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Golden Ridge Construction is a licensed general contractor (License #1149928) serving Cupertino, California, in Santa Clara County. We handle kitchen and bathroom remodels, ADUs, home additions, and whole-home remodels across Cupertino.
Source: U.S. Census Bureau, American Community Survey 2024 5-year estimates.
These are planning ranges for typical 2026 projects, not quotes. Every project is priced after a site visit.
Cupertino's housing is mostly 1950s through 1970s — ranch homes and split-levels on regular suburban lots, plus the Fairgrove Eichler tract and newer construction on the west side. Straightforward houses to work on, in a city with unusually specific rules about what you may do to them.
The demand here is heavily driven by schools, which means families buying homes that are too small and wanting more space rather than a different address. That makes additions and second stories the defining project type in Cupertino, more than in most nearby cities.
And that is exactly where Cupertino's R-1 ordinance becomes the central design constraint. It is worth understanding before you fall in love with a plan.
Cupertino runs permitting through an online portal with instant permits available for some simple work. For anything involving a second story, though, the schedule is set by the R-1 ordinance rather than by the queue — Cupertino's single-family rules are among the most specific in the South Bay.
The R-1 ordinance caps second-story floor area at 35% of the total, requires five-foot step-backs from the first-story walls, and enforces privacy standards for second-story windows. Those are not guidelines — they shape the massing of any two-story project from the first sketch.
Permit fees and review times change. Check current requirements on the City of Cupertino Building Division building permits page before planning around a date.
Cupertino's single-family residential ordinance regulates second stories more tightly than most cities in the region. Second-story floor area is capped at 35 percent of the home's total floor area, so the upper level is required to be meaningfully smaller than the lower one. Second-story walls must step back five feet from the first-story walls below, which prevents the flat two-story box.
There are also privacy requirements. Second-story window placement is regulated, and two-story projects must provide privacy planting — a planter of at least three feet, plants that will screen within three years, and a front tree in a 24-inch box.
None of this makes a second story impossible. It does mean that a design borrowed from another city will not work here, and that the massing has to be developed around these rules from the start rather than adjusted to fit them later.
In Cupertino the R-1 ordinance shapes a two-story addition before the architecture does. Design to the 35% cap and the five-foot step-back from the beginning — retrofitting a plan to meet them rarely works well.
Given how tightly second stories are regulated, a single-story rear addition is often the better answer in Cupertino — fewer constraints, no step-back geometry to solve, and no privacy planting requirement. It also avoids the structural work that adding a floor above 1950s framing usually demands.
ADUs are the other strong option. State law limits how far local rules can restrict them, which in a city with detailed R-1 standards is a meaningful advantage. Fairgrove and the older tracts have lots that generally accommodate a detached unit.
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