Palo Alto homes from the slab up: damage repair and rebuilds

Our file

What our Palo Alto file shows, and what it does not

We have done 4 jobs in Palo Alto. The first was in January 2024 and the latest in July 2026. Our crews took more than three thousand photos across those four, because every room we touch is recorded before, during and after the work.

Our log does not say which kind of work each Palo Alto job was, so we will not guess here. The work we do everywhere is water mitigation, mold remediation, fire and smoke cleanup, air duct cleaning, the reconstruction after the damage is handled, and construction and remodeling on its own. No homeowner here has cleared photos for the website yet, which is why you see our mascot instead of a kitchen. The hardwood floor job we have published shows a whole job from the first reading to the new floor.

Mid-century houses

About 2,700 Eichlers, and why a leak in one behaves differently

The city's Eichler Neighborhood Design Guidelines say Joseph Eichler built some 2,700 of his homes in Palo Alto, mostly in its central and southern parts, starting with tracts in 1949 and 1950. The guidelines describe post-and-beam houses on a concrete slab, with radiant heating embedded in the slab and largely flat roofs.

Flood map

Every Palo Alto address sits in a flood zone of some kind

That is the city's own sentence. Its flood zones and insurance FAQ explains that most of Palo Alto is Zone X, the lower-risk category, while the rest falls in Special Flood Hazard Areas, the land expected to flood in a flood with a 1 % chance in any year.

• Bay tides on the low side of town

  The largest special area runs toward the bay and is predicted to flood if extraordinary tides overtop the Baylands levees. The city notes some lots there sit only about two feet above sea level.

• The creek that overflowed in 1998

  Another zone follows overflow from San Francisquito Creek, and the city says it roughly matches the flood of February 1998, which it rates as a rare, once-in-generations event. The city keeps a map of where that water went.

• The hills were never studied

  The foothills have not been mapped for flooding and default to Zone X. That label there means no study, not no risk, and runoff from a slope is still water in a house.

• The 50 percent line after damage

  Inside a special area, the city treats a house as substantially damaged when full restoration would cost half or more of its pre-damage market value, and the rebuild then has to meet current flood rules. On a large loss we raise that question at the estimate, not at the permit counter.

To find your zone, Public Works answers by phone or through the city's flood zone lookup, and can issue a letter for a fee. FEMA's Flood Map Service Center has the official map.

Below grade

Basements, lightwells and shallow groundwater

Palo Alto's Public Works residential construction handout points to high groundwater throughout much of the city, and its rules for spaces below ground follow from that.

Housing age

A median year of 1963, and seven in ten built before 1980

The Census Bureau's 2020–2024 survey counts 29,241 homes in Palo Alto with a median year built of 1963. About 20,470 of them, or 70 percent, went up before 1980, and the 1950s alone account for 7,341, a quarter of the city (Census table B25034).

The other end matters too: 3,902 homes, about one in eight, date from 1939 or earlier, older than any slab-heated tract. Detached houses make up 16,814 of the total, a little under 60 percent (table B25024). An old house that gets wet tends to hide decades of earlier fixes behind the wall, so we take readings in every room the water could have reached and dry until the numbers say it is done. Where mold has grown, everything it touched is replaced with new material, never cleaned and reused. As a general note, paint in homes built before 1978 falls under the EPA's lead renovation rule when it is disturbed, so tell us the year your house was built when you call.

Rain

Fifteen inches a year, nearly all between November and March

NOAA's 1991–2020 climate normals for its Palo Alto station give the city about 15.1 inches of rain in a normal year. November through March bring close to 13 of those inches; June through September together bring about two tenths of an inch.

So a flat roof, a lightwell pump or a slab edge can sit untested for months and then meet the whole season at once. February is the wettest month in the record, and it is the month of the 1998 creek flood. When a storm opens the roof or the siding, our storm damage repair covers the drying and the repair, documented for the claim.

Ground

Checking the ground under a Palo Alto lot

The California Geological Survey maps zones where an earthquake can turn soil to the consistency of quicksand or set a slope sliding. Its EQ Zapp map shows whether a given address is in one.

The survey says those zones trigger geologic and engineering studies for new construction and significant remodels. A small repair does not reach that point. A rebuild that goes down to the foundation can, and that is when an engineer looks at the site before we pour or frame anything.

City hall

Getting a rebuild through Palo Alto Development Services

The city's Development Services office checks plans, issues building permits and runs inspections, and it no longer takes paper plans: every submittal is digital, through the Accela Citizen Access portal.

1. Is a permit needed at all?

   The Building Division's exempt-work sheet lists finish work such as painting and carpet, among other items, and tells owners to check with the division first. Opening walls, moving plumbing or rebuilding framing is a different matter.

2. Plans go in online

   An application is first checked for completeness before staff look at the plans in full. On remodels we handle the permits and the plans, and design is included; a rebuild with a remodel's scope goes the same way.

3. Inspections as the work goes

   Inspections are booked through the portal or the city's app; the final inspection is booked by phone.

4. Pay the city only through its portal

   The city warns about fake permit invoices sent by email. Fees go through the official portal, never a link in a message.

Insurance

Your adjuster, your deductible, our photos

If the damage goes through your homeowner's policy, we document the loss with photos, moisture readings and measurements, and send the adjuster an itemized estimate written in Xactimate. We are the repair contractor, never the adjuster; the claim stays between you and your insurer.

For the covered repair you pay only your deductible, and the insurer pays us the rest directly. Upgrades you choose along the way are priced separately. Flood is a separate policy from homeowner's cover, which is why we write down where the water came in. The insurance page has the rest.

Pages that go with a Palo Alto job

• Water damage restorationFrom the wet slab to the finished floor.
• Mold remediationCut out and replaced with new, never wiped.
• Sewage cleanupWhen the water that came in is category 3.
• Rebuild after damageFraming, drywall, floors and finishes.
• Whole-home remodelingWhen the repair becomes the moment to redo the house.

Questions

Palo Alto questions we hear