Sewer line replacement permits in Hayward, CA
General California guidance last updated October 12, 2026 · Hayward data fully re-verified
What plumbing contractors need to know about pulling a sewer line replacement permit in Hayward (Alameda County).
Short answer
In California, replacing a sewer lateral or building drain needs a plumbing permit, pulled by a licensed C-36 (Plumbing) or C-42 (Sanitation) contractor under the California Plumbing Code (Title 24, Part 5). The work often coordinates with the city's wastewater utility, and an encroachment / right-of-way permit is generally required when work extends into the public right-of-way.
Hayward accepts submittal through the Hayward e-Permits Portal (Tyler EnerGov Citizen Self Service) and has adopted the 2025 California Building Standards Code (Title 24, with Hayward amendments). Fee details and sources are below.
Hayward permit data
Sourced from public City of Hayward documents — every field carries the source URL and verification date.
- Permit portal
- Hayward e-Permits Portal (Tyler EnerGov Citizen Self Service)
verified Aug 9, 2026 · source · Stable city shortlink; currently resolves to https://haywardca-energovpub.tylerhost.net/Apps/SelfService#/home. Used to submit permit applications, add contractors to a project, pay fees, download permits, and schedule inspections
- Adopted code edition
2025 California Building Standards Code (Title 24, with Hayward amendments)
verified Aug 9, 2026 · source · Ordinance No. 25-13 (adopted December 2, 2025) adopts the 2025 California Building Code by reference as the Building Code of the City of Hayward, with local amendments; effective January 1, 2026. Note: this ordinance URL responds to GET requests only (HEAD returns 404)
The general picture in California
A sewer-line replacement covers the building's drain from the foundation out to the city main (or septic). The permit covers pipe material (typically ABS, PVC SDR-35, or cast iron for certain conditions), slope, bedding, cleanouts, backwater valve (required by ordinance in many California cities on lateral replacements), and connection to the city main. Trenchless methods — pipe bursting and cured-in-place pipe (CIPP) lining — are common and have their own submittal requirements. Work in the public right-of-way (between the property line and the main) often requires a separate encroachment permit from public works on top of the building permit.
Cured-in-place pipe (CIPP) lining is still permitted work. The 2025 California Plumbing Code allows trenchless rehabilitation of an existing building sewer only where the AHJ permits it (Section 715.3). A resin-impregnated liner must be installed to ASTM F1216 (inverted liner), F2561 (one-piece main-and-lateral liner), F2599 (sectional repair liner), or F3240 (hydrophilic gaskets for a watertight liner) (Section 715.3.1), and polyethylene pipe used for pipe bursting must conform to ASTM F714 (Section 715.3.2). Those are the only lining standards the section names, so check with the building department before you quote a lining method that follows a different one.
Some cities spell out how they inspect lining. Los Angeles issues the sewer (S) permit for lining a house-connection lateral to a bonded sewer contractor, requires CCTV before and after, and has a Public Works inspector decide whether the lateral can be lined at all (BOE permit manual). Santa Barbara wants pre-lining video with the request, keeps a city representative on site while the liner goes in, requires post-lining video of the full lateral and the wye at the main, and makes the contractor fix a liner that protrudes into the city main (lateral liner guidelines). On styrene, the California Department of Public Health's CIPP safety alert asks permitting agencies to warn occupants, control vapors, and require a lateral cleanout so the line can be plugged, and Cal/OSHA's limit of 50 ppm averaged over 8 hours applies to your crew. Before you hire a lining sub, look up the license on CSLB and ask for the permit number.
For deeper background that isn't Hayward-specific, see the statewide sewer line replacement guide.
Code basis
2025 California Building Standards Code (Title 24), which applies to permit applications filed on or after per the California Building Standards Commission. Sections checked against the published code; cities may add local amendments.
California Plumbing Code (Title 24, Part 5) §104.1 — Permits Required: a plumbing permit before installing, altering, repairing, replacing or remodeling a plumbing system; §104.2 (Exempt Work) covers only minor repairs such as stopping leaks and clearing stoppages without replacing or rearranging pipes, valves or fixtures.
California Plumbing Code (Title 24, Part 5) §715.3 — Existing Sewers: trenchless rehabilitation only where the AHJ permits it; §715.3.1 (Sewer Pipe Lining) names ASTM F1216, F2561, F2599 and F3240, and §715.3.2 (Sewer Pipe Replacement) names ASTM F714 polyethylene pipe for pipe bursting.
California Plumbing Code (Title 24, Part 5) §718.1 / §719.1 — Slope of the building sewer (§718.1) and the required cleanout locations (§719.1).
California Plumbing Code (Title 24, Part 5) §710.6 — Backwater Valves, within §710.0 for fixtures located below the next upstream manhole or the main sewer level.
California Plumbing Code (Title 24, Part 5) §723.1 — Building Sewer Test: the new sewer is tested before backfill.
Typically needs a permit
Sewer line replacement itself triggers a permit in nearly every California jurisdiction, Hayward included. Hayward-specific variations are confirmed with the issuing department above.
Usually doesn't (general norm)
- Clearing a drain stoppage with a snake or hydro-jet
- Repairing a single broken section of accessible pipe with the same material
- Camera-inspecting an existing lateral for diagnostics
Documents & plans generally required
- Plumbing permit application (plus encroachment / right-of-way permit if work crosses the property line)
- Contractor license and city business registration
- Site/plot plan showing the lateral route, depth, slope, and tie-in point at the main
- Pipe material, diameter, and class (ABS, PVC SDR-35, lined CIPP, etc.)
- Cleanout locations — at the building, at the property line, and at directional changes per code
- Backwater-valve detail where required by ordinance or where a fixture is below the next upstream manhole rim
- Trenchless method detail for pipe-bursting or CIPP (bursting head, host-pipe condition, liner thickness, cure method)
- Bedding and backfill specs
Common reasons sewer line replacement applications get bounced
Code-rooted patterns across California — not a Hayward-specific rejection rate.
- Slope insufficient — CPC minimums are typically 1/4-inch per foot for 3-inch and smaller, 1/8-inch per foot for 4-inch and up
- Missing cleanout at required locations (base of stack, property line, every 100 feet, and at direction changes)
- No backwater valve where the ordinance requires one — common in flood-prone or older sewered areas
- Pipe class not appropriate for cover depth or loading conditions
- Tie-in at the city main not coordinated with public works / wastewater utility
- Trenchless application missing host-pipe condition or liner-thickness calculation
The inspection sequence
A typical order — the number of stops and exact sequence vary by jurisdiction and scope.
- 1Pre-cover inspection with the new pipe in place, sloped, supported, and air/pressure-tested
- 2Right-of-way / utility inspection at the connection to the city main (when applicable)
- 3Final inspection with backfill, restoration, and any required surface work complete
Licensing — who can pull it
Sewer-line replacement in California is generally performed by a C-36 (Plumbing) or C-42 (Sanitation) licensed contractor; a B (General Building) contractor may pull within a larger project under CSLB rules. The licensed contractor doing the work typically pulls the permit; work in the public right-of-way may also require a separate encroachment-permit filing.
Other verified Hayward notes
Permit Center: 777 B Street, 1st floor lobby, Hayward, CA 94541; permits (510) 583-4005, Building Division (510) 583-4140; Monday–Thursday 9 AM–1 PM walk-ins, 1–5 PM by appointment.
verified Aug 9, 2026 · source
An e-Permits account is required for all users applying online — including customers who held permits before the portal launched; contractors are added to projects inside the portal.
verified Aug 9, 2026 · source
The e-Permits Portal schedules inspections and shows live status — including the inspector's estimated time of arrival (ETA) and inspection results.
verified Aug 9, 2026 · source
City Hall — including the Permit Center — is closed to the public on Fridays; Friday service is by virtual appointment only.
verified Aug 9, 2026 · source
Frequently asked questions
Do I need a permit to replace a sewer lateral in California?
Yes — replacing the building lateral (from the foundation to the city main) is permitted plumbing work in every California jurisdiction. Work in the public right-of-way usually requires an additional encroachment / right-of-way permit from the city's public works department.
What is a backwater valve and when is it required?
A backwater valve prevents sewer backflow into the building during a main-line surcharge. The California Plumbing Code requires one when any fixture is below the next upstream manhole rim; many California cities require one on every lateral replacement regardless. Check the local ordinance.
Do trenchless methods (pipe bursting, CIPP) need a permit?
Yes. The 2025 California Plumbing Code allows trenchless rehabilitation of a building sewer only where the AHJ permits it (Section 715.3). CIPP liners must be installed to ASTM F1216, F2561, F2599, or F3240, and polyethylene pipe used for pipe bursting must conform to ASTM F714. Submittals add details specific to the method: host-pipe condition, bursting head size or liner thickness, and cure procedure. Some cities spell out video inspection: Los Angeles requires CCTV before and after lining a house-connection lateral, and Santa Barbara requires post-lining video of the full lateral and the wye connection at the main.
Who connects to the city main?
The contractor performs the tie-in, but the city's public works or wastewater utility typically inspects (or requires advance notice of) the connection. Encroachment permits cover the work in the right-of-way; some cities require their own crew to perform the actual tap.
Are there California rules on styrene from CIPP curing?
The plumbing code's lining section sets material standards, not emission rules. The California Department of Public Health says there are insufficient standards or regulations to protect the public from CIPP chemical releases, and its safety alert (October 2023 update) recommends that permitting agencies warn occupants before work begins, capture emissions near homes, schools, and workplaces, and require a lateral cleanout so the line can be plugged. It also warns that water in drains and P-traps does not keep vapors out. For your crew, Cal/OSHA's permissible exposure limit for styrene is 50 ppm averaged over an 8-hour shift.
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