Aging supply lines and slab leaks
Large parts of the region were built in the 1950s to 1970s. Original galvanized supply pipe and copper lines running through slab foundations are common sources of hidden leaks.
Long Beach has a large stock of older homes and apartments near the coast, with more than half built before 1960. This page covers what usually causes water damage here, what to do in the first hour, and how to reach an independent restoration company that serves your ZIP code.
We are a referral service, not a contractor. Your call is connected to an independent company that covers Long Beach. How it works
In Long Beach, about four in five homes were built before 1980, and about half before 1960. Houses of that age often still have galvanized steel supply pipe, which rusts from the inside until it starts to weep at the joints, along with cast-iron drain lines that crack with age.
One practical step: test the main shutoff valve now. In older homes it is often stiff or rusted open, which turns a small leak into a large one while someone hunts for a wrench.
On a slab foundation, spilled water has nowhere to go but out across the floor. It wicks up drywall and runs under flooring, which is why the damage is usually wider than the wet spot you can see.
About 40% of homes in Long Beach are in buildings with five or more units. In apartments and condos, water from one unit often reaches the unit below, so tell management or the HOA right away. The building's master policy and your own unit or renters policy may each cover a different part of the damage.
Corroded pipe, older drain lines and leaks between units are frequent causes of damage.
Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for ZIP codes 90802, 90803, 90804, 90805, 90806, 90807….
Large parts of the region were built in the 1950s to 1970s. Original galvanized supply pipe and copper lines running through slab foundations are common sources of hidden leaks.
See the full list of regional water risks, and every city we cover nearby, on our California page.
In Southern California the main shutoff is often a valve where the water line enters the house, typically on an exterior wall near the front hose bib, with the city meter in a box near the curb.
If the water came from a toilet, a sewer line or outside, treat it as contaminated: see sewage backup cleanup or flood water cleanup.
The oldest housing in the area we cover is in 90806, where the median home was built in 1951. The newest is in 90804, with a median of 1970. Older ZIP codes tend to see more corroded pipe and drain failures; newer ones more appliance and fitting leaks.
| ZIP | Homes | Median year built | Built before 1980 | Renters |
|---|---|---|---|---|
| 90806 | 13,362 | 1951 | 82% | 63% |
| 90807 | 13,100 | 1951 | 87% | 43% |
| 90808 | 14,796 | 1955 | 95% | 18% |
| 90810 | 10,446 | 1956 | 83% | 40% |
| 90815 | 15,875 | 1957 | 88% | 35% |
| 90805 | 29,023 | 1959 | 80% | 58% |
| 90803 | 18,261 | 1960 | 83% | 56% |
| 90814 | 9,725 | 1961 | 81% | 66% |
| 90813 | 18,776 | 1967 | 68% | 85% |
| 90802 | 25,169 | 1970 | 64% | 79% |
| 90804 | 16,068 | 1970 | 68% | 78% |
U.S. Census Bureau, ACS 2020–2024 5-year estimates.
California homeowners policies usually cover sudden and accidental water damage but exclude flooding and long-term seepage.
The California page covers state insurance rules in more detail, and our claims guide explains how to document a loss.
Each guide below explains one kind of water damage and how it is handled.
Independent restoration companies we connect callers with cover these Long Beach ZIP codes:
Start within 24 to 48 hours; the EPA says materials dried in that window are much less likely to grow mold. Hidden moisture inside walls and under floors needs meters and drying equipment to find and remove.
With about four in five homes in Long Beach built before 1980, a lot of original galvanized supply pipe and cast-iron drain line is still in service. Both corrode slowly and tend to leak at joints inside walls and under floors, where water spreads before anyone sees it.
Calls from 90802, 90803, 90804, 90805, 90806, 90807, 90808, 90810, 90813, 90814, 90815, 90822, 90831, 90840 are routed to independent restoration companies that serve those ZIP codes. We are a referral service and don't do the work ourselves.
Have the source, the affected rooms and when it started ready, and the call will go quickly.