Marin County · Sewer Specialists

Sewer Repipe & Trenchless
Marin County, CA

Sewer line replacement and trenchless CIPP lining across all 11 Marin County cities. Camera-inspected diagnosis. 30-year warranty. Septic-to-sewer conversions handled.

Get a Free Estimate Call (408) 295-4309

30-Year Warranty

0% APR Financing

Free Estimates

CSLB #1057926

4.9★ Google Rating

Sewer Repipe & Trenchless · Marin County

Marin County's
Sewer Line Specialists

Marin County has one of the most varied residential sewer infrastructure profiles in the Bay Area. Pre-1900 clay laterals run beneath Sausalito's historic Bridgeway corridor and hillside Victorians, beneath Mill Valley's Old Mill Park bungalows, and beneath Ross's estate blocks — many over 130 years old. Mid-century clay and Orangeburg sewer pipe spreads across the postwar tracts of San Rafael Terra Linda, central Novato, Corte Madera Madera Gardens, and Larkspur Heather Gardens. The 1990s–2000s redevelopment at Hamilton in Novato uses modern ABS and SDR-35 PVC throughout. Aging clay and ABS lines run through the West Marin towns of Bolinas, Stinson Beach, Point Reyes Station, Inverness, and Woodacre.

What unites these cities is age. The majority of Marin County's residential sewer laterals are made of materials with a 50- to 75-year service life, and most have already exceeded that window. Recurring backups, root intrusion (especially severe under Marin's redwood and oak canopies in Mill Valley, Fairfax, and Ross), sinkholes in front yards, and slow drains are not isolated incidents in Marin — they are predictable signs of a county-wide infrastructure end-of-life. Marin also has an active septic-to-sewer conversion program in West Marin, where parcels historically on private septic are being connected to municipal sewer as service extends.

Repipe Champions serves all eleven Marin County cities and unincorporated Marin with paid camera diagnostic inspections, written same-day estimates, and trenchless or full-replacement options assessed at every job. Every project is permitted, city-inspected, and backed by our 30-year parts and labor warranty. Historic-district properties in Sausalito, Mill Valley, Ross, Belvedere, and Tiburon's Old Town are routinely best served by trenchless CIPP lining to avoid disturbing protected exterior siding, mature landscaping, and historic stone walkways.

Our Marin County line is (408) 295-4309.

Schedule Inspection Call (408) 295-4309

Marin County

Cities Served11 Cities
Oldest PipeSausalito (1860s)
Most CommonClay & Cast Iron
MethodsRepipe & Trenchless CIPP
SpecialtyWest Marin Septic-to-Sewer
Warranty30 Years Parts & Labor
Phone(408) 295-4309

Sewer line diagnosis and written estimate for Marin County homeowners.

Call (408) 295-4309

Two Options

Sewer Repipe vs. Trenchless Sewer Lining

Marin County homes have two paths to a fully restored sewer line. We assess both options at every estimate and recommend the most cost-effective solution for your specific situation — especially relevant for historic-district and mature-landscape properties.

Full Replacement

Sewer Line Repipe

Full excavation and replacement of your existing sewer line with new Schedule 40 PVC pipe. The most durable, longest-lasting solution — particularly for severely deteriorated, root-collapsed, or back-pitched lines common under Marin's redwood and oak canopies.

Removes all old pipe — no future deterioration

Best option for severely damaged or collapsed lines

New pipe — full 50+ year service life

Required for septic-to-sewer conversions in West Marin

Best for: Severely damaged lines, redwood and oak root collapse, back-pitched mid-century Orangeburg, or West Marin septic-to-sewer conversions.

No-Dig Option

Trenchless Sewer Lining

A cured-in-place pipe (CIPP) liner is inserted and expanded inside your existing sewer line, creating a seamless new pipe within the old one — without digging up your yard, driveway, mature landscaping, or historic walkways.

No trenching — landscaping and driveway untouched

Completed in 1 day in most cases

50-year liner lifespan

Ideal for historic-district homes in Sausalito, Ross, Belvedere

Best for: Homes with mature landscaping, long concrete driveways, sewer lines under hardscape, or historic-district homes in Sausalito, Mill Valley, Ross, Belvedere, and Tiburon's Old Town where excavation is restricted.

Service Area

Cities We Serve in Marin County

Click any city for neighborhood-specific sewer information, pipe type details, permit requirements, and pricing.

San Rafael

1900s–1970s · Clay and cast iron

View Sewer Repipe Page →

Novato

1940s–1990s · Clay, Orangeburg and ABS

View Sewer Repipe Page →

Mill Valley

1900s–1980s · Clay and cast iron

View Sewer Repipe Page →

Larkspur

1900s–1990s · Clay and cast iron

View Sewer Repipe Page →

Tiburon

1900s–2000s · Clay, cast iron and ABS

View Sewer Repipe Page →

Sausalito

1860s–1980s · Clay and cast iron

View Sewer Repipe Page →

Corte Madera

1950s–1990s · Orangeburg and clay

View Sewer Repipe Page →

Fairfax

1900s–1980s · Clay and cast iron

View Sewer Repipe Page →

San Anselmo

1900s–1980s · Clay and cast iron

View Sewer Repipe Page →

Ross

1900s–1970s · Clay

View Sewer Repipe Page →

Belvedere

1900s–1990s · Clay and cast iron

View Sewer Repipe Page →

Why Repipe Champions

Why Marin County Homeowners
Choose Us

Camera

Diagnostic Inspection

We inspect your sewer line with a camera before quoting — so you see exactly what you have.

30yr

Parts & Labor Warranty

Every sewer project backed for 30 full years, parts and labor.

1–2

Days to Complete

Most sewer repipes complete in 1–2 days. Trenchless lining typically completes in 1 day.

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Two Options Quoted

We quote both full repipe and trenchless lining at every estimate so you choose the best solution.

💳

0% APR Financing

Don't let budget delay urgent sewer work. Qualified homeowners can finance at 0% interest.

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All Permits Included

We handle every permit filing across all 11 Marin County cities, including historic-preservation reviews.

Common Questions

Marin County Sewer Repipe FAQ

Answers to the questions Marin County homeowners ask most about sewer line replacement and trenchless lining.

How much does a sewer repipe cost in Marin County? +

Marin County sewer line replacement typically ranges from $4,800 to $16,500 depending on length, depth, soil type, and access. Trenchless CIPP lining ranges from $6,500 to $18,500. Older Sausalito, Mill Valley, Ross, and Belvedere properties with century-old original clay laterals routed under mature landscaping or historic walkways tend toward the higher end. West Marin septic-to-sewer conversions add $2,500–$6,000 for new connection and main extension. Repipe Champions provides a written, all-in estimate after a paid camera diagnostic inspection — no surprises.

Which Marin County cities do you serve for sewer repipe and trenchless lining? +

We serve all eleven Marin County incorporated cities: San Rafael, Novato, Mill Valley, Larkspur, Tiburon, Sausalito, Corte Madera, Fairfax, San Anselmo, Ross, and Belvedere. We also serve unincorporated Marin including Kentfield, Greenbrae, Strawberry, Tamalpais Valley, Marinwood, plus the West Marin towns of Bolinas, Stinson Beach, Point Reyes Station, Inverness, and Woodacre. Crews dispatch from the Bay Area daily.

What sewer pipe materials are most common in Marin County homes? +

Marin County's housing stock is unusually varied. Pre-1940 homes in Sausalito's historic core, Mill Valley's Old Mill Park, Ross's estate blocks, San Rafael's Canal District, and Fairfax and San Anselmo downtowns almost universally have original clay sewer laterals — often over a century old. Postwar tracts in Novato, San Rafael Terra Linda, Corte Madera, and Larkspur built between roughly 1950 and 1980 mix Orangeburg and clay pipe. Hamilton AFB redevelopment (1990s–2000s) and modern Larkspur Marina, Tiburon hillside, and Belvedere infill use ABS and SDR-35 PVC. West Marin homes mix clay, cast iron, and early ABS. A camera inspection confirms your specific pipe material.

Is trenchless sewer lining a good option for older Marin County homes? +

Yes — in many cases it is the preferred option. Trenchless CIPP lining is particularly valuable for Sausalito Hillside Victorians, Mill Valley Old Mill Park bungalows, Ross estate homes, Belvedere island estates, and Tiburon Old Town — properties where mature landscaping, historic walkways, hand-laid stone retaining walls, or strict preservation enforcement make excavation prohibitive or expensive. It avoids excavation entirely while creating a seamless new pipe inside the existing line. We assess trenchless feasibility at every estimate.

Do Marin County cities require permits for sewer line replacement? +

Yes. Every Marin County city requires a building or plumbing permit for sewer line replacement, and an additional encroachment permit when work extends into the public right-of-way (which is common for laterals reaching the city main). Permit costs typically range $280–$840 depending on city. Historic-district properties in Sausalito, Mill Valley, Ross, Belvedere, Tiburon Old Town, and downtown Larkspur, San Anselmo, and Fairfax also require preservation review. West Marin septic-to-sewer conversions require additional Marin County Environmental Health Services coordination. Repipe Champions handles every permit filing on your behalf and includes the cost in your written quote.