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Repairing and rebuilding Cupertino homes after damage
Four creeks come down from the hills, most houses date from the 1960s and 1970s, and some neighborhoods sit under a homeowners association or carry Eichler rules. Here is how those facts shape a repair in Cupertino.
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From our job log
5 jobs in Cupertino, October 2025 to October 2026
Cupertino is a newer city on our map. Our crews took the first job there in October 2025, and the fifth is from this month, October 2026. Five jobs in one year, each one photographed from the first reading to the finish.
The log keeps the dates and the photos, not a label for the kind of work, so we will not tell you what those five were. The company does six things: water mitigation, mold remediation, fire and smoke cleanup, air duct cleaning, reconstruction once the damage is under control, and construction and remodeling on its own. Any of them can start with one call to the same number.
No Cupertino owner has cleared photos for the website yet. When one does, the pictures go here with a plain caption and nothing that points to the house. Meanwhile you can look through a complete job we have published, the hardwood floor tear-out and rebuild.
The housing
What the Census says about Cupertino's houses
The Census Bureau's American Community Survey for 2020–2024 counts 22,158 homes in Cupertino. Their median year built is 1973, give or take a year.
The 1960s built the most
5,959 homes, more than a quarter of the city, went up between 1960 and 1969, the largest decade in table B25034. Add the 1950s and 1970s and about 64 % of all homes were built before 1980. Only about one in fifteen dates from 2010 or later.
Mostly houses, many owned
About 58 % are detached single-family houses and roughly one in seven is an attached townhome (table B25024). Of the occupied homes, about 61 % are lived in by their owners and 39 % are rented (table B25003).
Plumbing that has outlived a few owners
A house from 1965 may hold its first supply lines next to sections replaced in the 1990s and again last year. We trace a leak back to its source instead of drying around it, then follow the wet framing and insulation room by room with a meter.
Matching what stays
Generations of remodels leave plaster beside drywall and one flooring laid over another. The rebuild is planned around what is kept, or a full run is replaced so a wall or floor reads as one piece again.
The 1978 paint line
Most of the city was built before 1978, the year the EPA uses in its lead renovation, repair and painting rule for work that disturbs paint. Treat that as a general note and ask any contractor how they handle it before walls are opened.
Mold is cut out, not wiped
Whatever the age of the house, every material the mold reached is taken out and replaced with new. Our mold remediation page walks through containment and removal.
Creeks and floodplains
Four creeks, one reservoir and the 0.2-percent-annual-chance floodplain
The city's 2025 Health and Safety background report names Permanente, Stevens, Regnart and Calabazas creeks as the four streambeds that cross Cupertino. The 1-percent-annual-chance floodplain runs mainly along them, and a majority of the city lies inside the 0.2-percent-annual-chance floodplain.
Zone A or AE, or neither
The city's floodplain management page says Cupertino's FEMA special flood hazard areas are Zone A and AE. Type your address into the city's Service Finder under "FEMA Flood Zone", or open the official map at FEMA's Flood Map Service Center. Public Works may already hold an elevation certificate for your lot.
Below the Stevens Creek dam
Stevens Creek Reservoir sits just outside the city to the southwest. The same report says a dam failure would flood the land around Stevens Creek, homes beside the creek and part of I-280 included. The dam is inspected by the state every year.
Rebuilding in the zone
New construction or a substantial improvement inside the flood hazard area must meet extra rules in the Municipal Code (Chapter 16.52.043). A large rebuild there starts with Public Works and the Building Division, before anything is framed.
The city also reminds owners that a standard homeowner's policy does not pay for flood losses. Whether creek water or a burst pipe caused the damage decides which policy is read, and that stays between you and your insurers. Our job is the record: where the water came in, how high it rose and which rooms it reached, in photos and readings.
The western foothills
Why the west side of town gets different questions
Cupertino runs from flat suburban streets up into the foothills, and the city's background report treats the two halves differently.
Slides after wet winters
The hilly western part of the city is in a very high landslide susceptibility class, and the report calls landslides the greatest geologic hazard in Cupertino, mostly in winters with heavy rain. Slides are also likely along the steep banks of the Stevens Creek floodplain.
Faults that cross, and a zone that does not
The Sargent-Berrocal and Monta Vista-Shannon fault systems cut through the west of the city, and the San Andreas Fault lies about 5.5 miles west. Yet no Alquist-Priolo earthquake fault zone falls inside city limits. The state's EQ Zapp map shows the zones for any address.
Soft ground near the creeks
Land near the four creek floodplains is likely to liquefy in a strong earthquake, the report says, and only a site study tells you about one lot. When a rebuild reaches the foundation, that is when an engineer looks at the ground.
Brush, smoke and the canyon roads
The county rates the Montebello Road and Stevens Canyon area just outside the city fourth-highest for fire risk in the county, and homes there without water service keep their own tanks and sprinklers. The nearest recorded wildfire, the 2007 Stevens Fire, burned 151 acres in the canyon. Smoke travels further than flames; our fire and smoke cleanup covers the soot and residue a house keeps afterwards.
The rain year
When does Cupertino get its rain?
Winter rains fall from about November to March, and the city receives roughly 23.7 inches in an average year, according to its background report. Summer storms are rare.
The averages hide the bursts. The same report lists the storms of December 2005 to January 2006, when two to four inches fell across the county in about 24 hours, and the atmospheric river of February 2019 that brought flooding, debris flows and fallen trees. It expects rain to arrive in fewer, heavier storms, with floods more often along Stevens Creek. Each fall, city crews vacuum the storm drain inlets before the rains begin, and filled sandbags are free at a self-serve station outside the City Maintenance Yard.
Inside a house, the first heavy storm after a dry summer is when a tired roof valley, a clogged gutter or a cracked window seal shows itself. When wind or rain opens the roof or siding, our storm damage repair covers the drying and the repair together.
The Building Division
Which Cupertino repairs need a permit?
The city's Building Division FAQ lists what a single-family home can do without a permit, and says anything not on the list needs one.
No permit
Painting, papering, tiling, carpeting, cabinets, countertops and similar finish work. Clearing a stoppage or repairing a leak in a pipe, valve or fixture. The exemption ends where the work touches a subsurface drain, a public utility easement or a required setback.
A permit
New construction, remodeling and anything else not listed, which after real damage usually means framing, wiring, plumbing runs and the walls closed over them. Applications and payments go through the city's Accela Citizen Access portal.
Instant permits, with limits
Some like-for-like jobs get an instant online permit: a re-roof, siding, a furnace in the same place, a standard gas water heater, an interior re-pipe. Eichler homes are left out of the instant re-roof, siding and solar permits, and homes under an HOA are left out of most of the list.
The business license at the end
The city will not schedule a final inspection until the contractor and every subcontractor on the job hold a City of Cupertino business license.
On remodels we take care of the permits and the plans, and design is part of it. A rebuild after damage with the same scope goes the same way. When it is unclear whether a small repair is exempt, the Building Division decides, and we ask them.
Before you call
Five things that help us plan a Cupertino job
Inside or outside
Did the water come from a pipe, an appliance or the roof, or from outside along the ground? It decides the drying plan and which policy is read.
The year the house was built
A 1960s house and a 2015 house open up very differently behind the drywall.
Eichler or HOA
Either one changes the permit path for a roof or siding, and an association may own part of what was damaged.
Your flood zone
If the Service Finder shows Zone A or AE, a large rebuild starts with Public Works.
Your policy
We write an itemized estimate in Xactimate for your adjuster. We are the repair contractor, not the adjuster; for the covered repair you pay only your deductible, the insurer pays us the rest directly, and upgrades you pick are priced on their own.
Pages for the work a Cupertino house may need
Questions
Cupertino questions, answered
A water main broke near my Cupertino home. Which water company do I call?
The city's background report splits the service at Stevens Creek Boulevard: California Water Service north of it, San Jose Water south of it. Sewer lines belong to the Cupertino Sanitary District. If the water has reached inside your house, call us at (281) 671-7777 too, day or night.
Can I fix a leak in my Cupertino house without a city permit?
Repairing a leak in a pipe, valve or fixture is on the city's list of work a single-family home can do without a permit, and so are finishes like paint, tile, carpet and cabinets. Replacing framing, wiring or plumbing runs after the damage is not on that list, so it needs one.
My Cupertino home is an Eichler. Can a new roof go through the instant online permit?
No. The Building Division excludes Eichler homes from its instant re-roof, siding and solar permits, and homes under an HOA are excluded too. Those jobs go through the regular application in the Accela Citizen Access portal, which we plan for when a roof is part of the repair.
Would my Cupertino home flood if the Stevens Creek dam failed?
The city's background report says a failure at Stevens Creek Reservoir would flood the land around Stevens Creek, including homes next to the creek and part of I-280. It shows the area on a map of dam inundation zones. For your FEMA flood zone, use the city's Service Finder.
Why does Cupertino want my contractor's business license?
The city will not schedule a final inspection until the contractor and all subcontractors on the job hold a City of Cupertino business license. Without the final inspection the permit is not closed, so it is worth asking before work starts.
Don't Wait—Call Remediate.
What happened at your Cupertino house?
Tell us where the water, smoke or mold is, which rooms it reached and the year the house was built. We call back, or you can call now.
Call (281) 671-7777