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Castro Plumbing & Drain, Inc.

San Francisco's Drain & Pipe Specialists

Licensed plumbers serving the Mission District and surrounding neighborhoods — same-day appointments, clear pricing, no surprises.

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Verified Reviews

4.8 stars from 127 Google reviews. C-36 Licensed — CSLB #1058923. Fully insured.

127

Verified Reviews

Capabilities

Our Services

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Drain Clearing

Clogged drains cleared same day. Kitchen, bathroom, floor, and main line — we have the equipment for all of it.

Pipe Repair & Replacement

From a simple patch to full repipe. We work with copper, PEX, and ABS — whatever's right for your situation.

Water Heater Service

Tank and tankless water heater repair, replacement, and flush. We carry common parts and can often fix on the first visit.

Sewer Line Inspection

Camera inspection before you buy or if you're having chronic drain problems. Video report included.

Emergency Plumbing

Burst pipe, active leak, or sewage backup? We offer after-hours emergency response in San Francisco and Daly City.

Fixture Installation

New faucets, toilets, garbage disposals, and shut-off valves installed correctly with all proper permits.

Our Story

Castro Plumbing & Drain has served San Francisco families and small businesses since 2009. We're a crew of three licensed plumbers who grew up in the Mission and take pride in honest work at fair prices. When we show up, we explain what's wrong before we touch anything — and we clean up completely when we're done.

— Castro Plumbing & Drain, Inc., San Francisco

Client Voices

What Neighbors Say

Called at 8 AM for a backed-up kitchen drain and they were here by 11. Professional, efficient, and left the space cleaner than they found it.

Straight shooter. Told me exactly what was wrong with my water heater and what the fix would cost before doing anything. Rare in this industry.
★★★★★ Derrick T.
Good work on the repipe. Took two days as promised, no surprises on the bill. Would hire again.
★★★★★ Sun L.
Fast response for an emergency. Burst pipe at midnight — they were there within the hour and stopped the damage.
★★★★★ Brendan O.

Call First(415) 555-0183

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Coverage

Service Area

We serve San Francisco and the nearby peninsula cities. Most jobs are same-day or next-day.

San FranciscoDaly CitySouth San FranciscoBrisbaneColma

Need-To-Know

Frequently Asked Questions

Do you offer same-day drain clearing?

Yes, for most clogged drains we can have someone out the same day. Call before noon for the best chance at a morning slot.

Are you licensed and insured in California?

Yes. We hold an active C-36 Plumbing Contractor license with the California Contractors State License Board, and we carry full liability and workers' comp insurance.

Do you provide free estimates?

We provide free phone estimates for straightforward jobs and a $75 diagnostic fee for jobs that require us to come out and assess before quoting. The fee is waived when you proceed with the work.

What areas do you serve?

We serve San Francisco (all neighborhoods), Daly City, South San Francisco, Brisbane, and Colma.

Can you handle emergencies after business hours?

Yes. We offer emergency response for active leaks and sewer backups. After-hours rates apply — ask when you call.