Why Every Bay Area Homeowner Needs an Annual Plumbing Inspection

Most homeowners don’t think about plumbing until something breaks. Here’s why an annual inspection is one of the smartest investments you can make in your home.

You take your car in for service every year. You see your doctor for an annual checkup. But when was the last time anyone looked at your plumbing?

For most Bay Area homeowners, the answer is never — until something goes wrong.

Water damage and plumbing failures are among the largest unexpected expenses a homeowner can face. The good news: most of them are preventable.

What Can Go Wrong — And Why It Happens

Plumbing problems rarely appear out of nowhere. They build slowly, quietly, behind walls and under floors where no one’s looking. By the time you notice something, the damage is already done.

The most common issues we find during inspections:

Leaking and running toilets — the single largest source of water waste in the home. A constantly running toilet can waste up to 200 gallons a day. In a state already facing chronic water shortages, it’s both an environmental and financial problem most homeowners don’t even know they have.
Slow leaks under sinks and behind fixtures that have been dripping for months.
Corroded supply lines that are one pressure spike away from failing.
Over-pressurized or unregulated cold water supply — high water pressure silently stresses every pipe, fixture, and appliance in the home. It’s one of the most overlooked causes of premature failure and one of the easiest to fix.
Water heaters running inefficiently or past their safe service life.
Main sewer laterals with root intrusion or buildup that will eventually back up.

The Bay Area Has Unique Challenges

San Francisco and the broader Bay Area present specific plumbing challenges that make annual inspections even more important:

Older housing stock — many homes have original galvanized or cast iron pipes that are decades past their expected lifespan.
Hard water — mineral buildup accelerates fixture and water heater wear.
Seismic activity — even minor earthquakes can stress joints and connections over time.
Hillside homes and steep lots — drainage and lateral lines take more abuse than flat-grade properties.

What the Numbers Say

Water damage is not a rare event. About 1 in 60 California homes files a water damage claim every year — and the average payout runs between $11,605 and $13,954 per claim. California ranks first in the nation for non-weather water damage claim costs.

Nationwide, water damage accounts for 27.6% of all homeowner insurance claims. There are roughly 14,000 water damage incidents per day across the country. These aren’t freak accidents — they’re the predictable result of deferred maintenance.

A sewer lateral replacement in San Francisco typically runs $8,000–$15,000. A water heater failure that floods a utility room can easily reach $10,000 once remediation is included. An annual inspection costs a fraction of either.

The Insurance Problem Bay Area Homeowners Can’t Ignore

California’s homeowner insurance market is under serious stress. Between 2019 and 2024, more than 100,000 California homeowners lost their coverage as major insurers canceled or declined to renew policies. State Farm, Allstate, Farmers, and Safeco have all pulled back or limited new policies in the state. Premiums for those who still have coverage have risen 20% or more since 2023.

Insurers are not just looking at wildfire risk. Water damage claims — burst pipes, appliance failures, sewer backups — are a significant driver of non-renewals. Filing a water damage claim can make your policy harder to renew, more expensive to keep, or impossible to replace if you lose it.

An annual inspection is one of the most practical things a homeowner can do to reduce the likelihood of ever filing that claim in the first place.

What a 100-Point Plumbing Inspection Covers

A thorough inspection isn’t a quick walkthrough. At Nigel Mulgrew Plumbing, our 100-point inspection covers every system in your home — fixtures, supply lines, drain lines, water heater, shutoff valves, water pressure, and a camera inspection of your main sewer lateral.

You get a written report with everything we find, prioritized by urgency. No surprises, no pressure — just a clear picture of where your home stands.

How to Stay Ahead of It

The easiest way to make sure your home gets inspected every year is to make it automatic.

Our Home Protection Plans include an annual 100-point inspection with camera, priority scheduling, and discounts on every service call — starting at $449/year. It’s the same logic as any other maintenance plan: pay a little now, avoid paying a lot later.

If you’d prefer to start with a standalone inspection, we can schedule that too.