A C-15 Flooring and Floor Covering contractor license is the CSLB specialty classification required to prepare surfaces for, and install, carpet, resilient sheet and tile flooring (including vinyl and LVP), laminate flooring, wood flooring, and rubber or synthetic sports flooring in California — covering essentially every flooring material except ceramic, porcelain, and stone tile, which fall under the separate C-54 classification. Anyone contracting for flooring work where labor and materials exceed the state’s small-job threshold must hold this license, pass two CSLB exams, and meet the board’s bonding, fee, and insurance requirements described below.
What a C-15 License Covers
California Code of Regulations, Title 16, Division 8, Article 3, Section 832.15 defines the classification in a single sentence: a C-15 contractor “prepares any surface for the installation of flooring and floor coverings, and installs carpet, resilient sheet goods, resilient tile, wood floors and flooring (including the finishing and repairing thereof), and any other materials established as flooring and floor covering material, except ceramic tile.” That wording authorizes surface prep even when no flooring goes down the same day, and it draws a hard exclusion line at ceramic tile.
In day-to-day practice, a working C-15 contractor’s job list looks like:
- Hardwood floor installation and refinishing — installing solid or engineered wood flooring, then sanding, filling gaps, staining, and applying urethane or other finishes during a whole-house renovation or a pre-sale refresh.
- Carpet installation — laying tack strip and cushion, seaming and power-stretching broadloom carpet in a single-family home or an apartment turnover.
- Resilient, LVP, and vinyl flooring — cutting and adhering luxury vinyl plank, sheet vinyl, or resilient tile in a kitchen or bathroom remodel, including transitions and trim pieces.
- Commercial carpet tile — installing modular carpet tile across an office tenant-improvement buildout, including the subfloor moisture testing CSLB requires before installation.
- Subfloor leveling and prep — grinding high spots out of a concrete slab, applying self-leveling underlayment, and mitigating moisture before any finish flooring goes down — work that is C-15 scope even on a stand-alone prep contract with no visible flooring installed.
- Rubber and sports flooring — installing rolled rubber or synthetic athletic flooring in a gym or multi-purpose room, including adhesive application and seam sealing.
The C-15 Exam: What CSLB Actually Tests
Unlike some classifications where CSLB doesn’t publish topic weighting at all, the official C-15 examination study guide (for exams scheduled on or after January 1, 2026) lays out an exact eight-section content outline. We’re citing it directly rather than estimating:
- Planning and Estimating — 21%
- Subfloor Evaluation, Preparation, and Material Acclimation — 20%
- Safety — 13%
- Carpet Installation — 12%
- Resilient and Rubber Flooring Installation — 12%
- Wood Flooring Installation — 10%
- Laminate Flooring Installation — 8%
- Concrete Treatment and Synthetic Application — 4%
CSLB notes these percentages are approximate, but the ordering is informative: planning/estimating and subfloor prep together account for 41% of the trade exam — more than all four installation-method sections (carpet, resilient, wood, laminate) combined. CSLB is testing whether a candidate can evaluate plans, calculate quantities, and prepare a subfloor correctly at least as heavily as it tests any single installation technique. The exam is closed-book, multiple choice with four options per question, and a calculator is provided for the math-heavy estimating questions. Every C-15 applicant also sits for the separate Law and Business exam required across all classifications.
C-15 License Requirements
- Experience: four years of journey-level flooring experience within the past 10 years. Up to three of those years may come from directly related education or apprenticeship training, but at least one year must be documented, hands-on practical experience.
- Contractor license bond: $25,000, per Senate Bill 607, effective January 1, 2023 (increased from $15,000).
- Bond of Qualifying Individual (BQI): a separate $25,000 bond is required when the qualifying individual (RMO or RME) does not own at least 10% of the licensed business.
- Fees: a $450 nonrefundable application fee, plus a $200 initial license fee for a sole owner or $350 for a non-sole-owner entity, due after passing both exams.
- Live Scan: a fingerprint-based background check is required of every applicant.
- Workers’ compensation: C-15 is not one of the classifications CSLB bars from self-certifying an exemption — that mandatory-coverage list is limited to C-8, C-20, C-22, C-39, and D-49. A C-15 contractor with no employees can currently file for exemption. That window is closing, though: Senate Bill 1455 requires every CSLB licensee, regardless of classification or employee count, to carry workers’ compensation insurance starting January 1, 2028.
- Unlicensed small-job threshold: Assembly Bill 2622 raised the exemption for unlicensed work from $500 to $1,000, effective January 1, 2025. That exemption evaporates the moment a project needs a building permit or the person doing the work hires help — it is not a workaround for anyone regularly contracting flooring jobs.
Where C-15 Ends: C-54, C-6, and B General Building
C-15 vs. C-54 Ceramic and Mosaic Tile
The boundary is written directly into the regulation: C-15 covers “any… flooring and floor covering material, except ceramic tile.” Ceramic, porcelain, natural stone, glass, and mosaic tile — on floors, walls, or countertops — falls under C-54, including the backerboard and waterproofing that go with tile work. A contractor installing an LVP kitchen floor holds C-15; the same floor in porcelain tile requires C-54. Many renovation companies hold both, since residential jobs often mix flooring materials room to room.
C-15 vs. C-6 Cabinet, Millwork and Finish Carpentry
Wood flooring is the real collision point with C-6. Installing, sanding, and finishing hardwood flooring is explicitly C-15 scope — Section 832.15 names “wood floors and flooring…including the finishing and repairing thereof” directly. Baseboard, shoe molding, and stair-tread carpentry that isn’t the floor surface itself leans toward C-6 finish carpentry. Many C-15 contractors install their own transition moldings as incidental to a flooring job, while finish carpenters generally stay out of wood floor sanding and refinishing, which calls for a different skill set — abrasives, staining, and finish chemistry.
B General Building
A B General Building contractor can perform or subcontract flooring work when it’s genuinely part of a larger project involving framing and at least one other unrelated trade. CSLB restricts B licensees from using that classification to run a flooring-only business or bid flooring-only contracts; a project that’s exclusively flooring replacement, with no structural or multi-trade component, calls for a C-15 (or C-54) specialty license instead.
Who Needs a C-15 License?
The C-15 license shows up most often behind flooring retailers that run their own installation crews rather than subcontracting the work out, commercial tenant-improvement subcontractors bidding office and retail buildouts, hardwood refinishing specialists working heavily in resale and pre-listing prep, and multi-family renovation contractors who turn over apartment units between tenants and need to move fast on carpet and LVP replacement. It’s also common among flooring showroom owners who want to sell installed product directly rather than referring installation out to a third party.
Frequently Asked Questions
Does a C-15 license cover ceramic tile flooring?
No. 16 CCR §832.15 excludes ceramic tile by name. Tile floors, walls, and countertops fall under the separate C-54 Ceramic and Mosaic Tile classification.
Can a C-15 contractor legally do subfloor leveling without installing any flooring the same day?
Yes. Section 832.15 explicitly authorizes “preparing any surface for the installation of flooring,” so subfloor grinding, self-leveling underlayment, and moisture mitigation are within scope even as a stand-alone prep contract.
Does CSLB publish exact percentages for the C-15 trade exam?
Yes. CSLB’s official C-15 study guide, for exams scheduled on or after January 1, 2026, publishes an eight-section outline with percentage weights (listed above), while noting the figures are approximate.
How much experience do I need, and can schooling substitute for it?
Four years of journey-level experience in flooring work within the past 10 years. Up to three of those years can be substituted with directly related education or apprenticeship training, but CSLB requires at least one full year of actual hands-on practical experience regardless of your education.
Do I need workers’ compensation insurance for a C-15 license?
Not automatically today. C-15 is not on CSLB’s mandatory-coverage list (C-8, C-20, C-22, C-39, D-49), so a C-15 contractor with no employees can currently self-certify an exemption. That changes under Senate Bill 1455: every CSLB licensee, in every classification, must carry workers’ compensation coverage starting January 1, 2028.
What’s the license bond amount for a C-15 license?
$25,000 — the statewide contractor license bond amount CSLB set under Senate Bill 607, effective January 1, 2023. A separate $25,000 Bond of Qualifying Individual applies if your RMO or RME doesn’t own at least 10% of the business.
Can I do a small flooring job without a license at all?
Assembly Bill 2622 raised California’s unlicensed-work threshold from $500 to $1,000, effective January 1, 2025, for total labor-and-materials cost. That exemption only applies when no permit is required and no workers are hired — it isn’t a path around licensing for anyone running an ongoing flooring business.
Is laminate flooring installation tested the same as resilient flooring?
They’re both C-15 scope, but CSLB tests them separately: Resilient and Rubber Flooring Installation (12%) and Laminate Flooring Installation (8%) are distinct sections in the current study guide, reflecting real differences in method — adhesive or heat-welded sheet goods versus click-lock laminate planks.
If you’re not yet sure C-15 is the right classification for the work you actually do, start with our classification finder before committing to an exam date. Once you’ve confirmed it, Contractor Pathway’s C-15 exam prep course is built around this exact eight-section CSLB outline — not a generic flooring overview — so your study time matches how CSLB actually weights planning, subfloor prep, and each installation method. See how the course works, check pricing, or contact us with questions about documenting your specific experience before you apply.