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C-53 Swimming Pool Contractor License in California

C-53 is CSLB's Swimming Pool Contractor classification (16 CCR §832.53). Builds swimming pools, spas and hot tubs, including pool solar heating. Applicants take the Swimming Pool (C-53) Examination as well as the Law and Business exam. CSLB's Data Portal lists 2,842 active licenses in this class (read November 7, 2026). CSLB Swimming Pool (C-53) Trade Examination — Questions: Not published by CSLB · 210 minutes · Passing score: Not published by CSLB. PrepPass also publishes a complete study guide for this exam as a downloadable book (218 pages, 216 practice questions inside, $24.99).

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PrepPass Course: CSLB Law and Business

This license also needs the Law and Business exam (CSLB can waive an exam in some cases). 110 lessons, 732 practice questions.

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Seven sections, weighted like this

Weights published by California Contractors State License Board (CSLB) in the CSLB License Examination Study Guide: Swimming Pool (C-53), form 13E-53 (03-2026), checked November 8, 2026. Under each: how many of our free questions cover it.

Swimming Pool/Spa Shell Construction32%107 free questions · practice this section →

Planning and Estimating21%69 free questions · practice this section →

Safety18%57 free questions · practice this section →

Pool/Spa Systems Installation11%40 free questions · practice this section →

Pool/Spa Deck and Shell Finish9%27 free questions · practice this section →

Pool/Spa Repair, Renovation, Removal, and Maintenance6%22 free questions · practice this section →

Commercial Swimming Pools/Spas3%18 free questions · practice this section →

Exam inside two weeks?

A printable colour cheat sheet for the exam: the format, the content areas and the figures it turns on, each checked against a named source and dated.

CSLB C-53 Swimming Pool cheat sheet PDF — $9.99 →

6 pages · US Letter · printable PDF · yours to keep

The C-53 license, from CSLB's own pages

What the C-53 license covers and what CSLB requires

Swimming Pool Contractor (16 CCR §832.53). Builds swimming pools, spas and hot tubs, including pool solar heating.

Trade exam: Yes. Applicants take CSLB's Swimming Pool (C-53) Examination as well as the Law and Business exam.
Exam topics and weights: Planning and Estimating21%
Swimming Pool/Spa Shell Construction32%
Pool/Spa Systems Installation11%
Pool/Spa Deck and Shell Finish9%
Commercial Swimming Pools/Spas3%
Pool/Spa Repair, Renovation, Removal, and Maintenance6%
Safety18%
As published in CSLB's study guide, form 13E-53 (03-2026), for examinations scheduled on or after June 1, 2023.
Experience: At least 4 years journey-level/foreman/supervisor/contractor/owner-builder experience in the class within the last 10 years; up to 3 years credit for education/apprenticeship, at least 1 year must be practical. Source: 16 CCR §825 (2026 CSLB Law Book); CSLB Step 3 Qualifying Experience page.
Active licenses: 2,842 active licenses (CSLB Data Portal, read November 7, 2026)

CSLB's official C-53 study guide (PDF)CSLB's C-53 classification page

Free C-53 practice questions Free C-53 study guide C-53 study guide book, $24.99 CSLB C-53 Swimming Pool cheat sheet PDF Bundle: $30.99 for 4 items All California license classes

Facts as of November 7, 2026; check CSLB for current rules. PrepPass is independent of CSLB.

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Practice finds the gaps. Reading closes them. The seven chapters below are free to read online. The study guide book is a separate download, sold on its own page.

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340

questions, each explained — finds what you don't know yet

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218

pages in the study guide book, section by section

The seven sections, as chapters

free to read online

1Planning and Estimating21% of the examRead free →
2Swimming Pool/Spa Shell Construction32% — the largest sectionRead free →
3Pool/Spa Systems Installation11%Read free →
4Pool/Spa Deck and Shell Finish9%Read free →
5Commercial Swimming Pools/Spas3%Read free →
6Pool/Spa Repair, Renovation, Removal, and Maintenance6%Read free →
7Safety18%Read free →

Study guide · PDF + EPUB

CSLB C-53 Swimming Pool Study Guide — 2026 Edition

218 pages · 216 practice questions inside · updated 2026-11-08

$24.99 one-time · yours to keep

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216 original CSLB swimming pool trade-exam practice questions, each with a worked explanation, in one PDF + EPUB you keep

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Free study guideEvery section, online Topics by weightWhat to study first How hard is it?Honest answer, with numbers Scores & retakesWhat the board publishes One-page cheat sheetNight-before facts

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Real items, with the answer marked and the reason written out — the same format as all 340.

Swimming Pool/Spa Shell Construction

An excavation for a pool is 5 feet 6 inches deep in firm clay. What must protect the workers inside?

AA warning tape placed around the top edge
BA protective system, such as slopingCorrect
CA spotter watching from the top of the hole
DA ladder provided for each worker entering

Why: Excavations 5 feet or deeper need a protective system such as sloping, benching, shoring or a shield unless in stable rock. Tape marks the area, a spotter cannot stop a collapse, and a ladder gives egress but no cave-in protection.Title 8 §1541.1(a)

Planning and Estimating

On a plan drawn at 1/4 inch = 1 foot, a patio measures 5-1/2 inches. How long is the patio?

A5-1/2 feet
B22 feetCorrect
C11 feet
D44 feet

Why: At 1/4 inch to the foot each paper inch is 4 feet, so 5.5 × 4 = 22 feet. Eleven feet uses 1/2 inch = 1 foot, 44 feet uses 1/8 inch = 1 foot, and 5-1/2 feet ignores the scale.CSLB C-53 study guide 13E-53 (computation questions)

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The exam itself

CSLB C-53 Swimming Pool (Trade Exam), by the numbers.

Questions	Not published by CSLBCSLB says only that “All trade examinations consist of multiple-choice questions.” No count appears in the study guide, the Examinations FAQ, or PSI's candidate bulletin.
Time	210 minutesCSLB: “You will be given 3-1/2 hours to complete each examination.” It is per examination, not per sitting — a candidate taking Law and Business plus a trade exam gets 3-1/2 hours for each.
Sections	Planning and Estimating · Swimming Pool/Spa Shell Construction · Pool/Spa Systems Installation · Pool/Spa Deck and Shell Finish · Commercial Swimming Pools/Spas · Pool/Spa Repair, Renovation, Removal, and Maintenance · Safety
Passing score	Not published by CSLBCSLB: “You will be informed at the test site about the percentage of correct answers needed to pass each examination,” and, in Get Licensed to Build Q14, that the percentage “varies for each exam”. Passing candidates are never shown their own score. PrepPass states no passing score for this exam.
Our bank	340 questions · updated November 2026Written from California Contractors State License Board (CSLB)
Languages	English
Source	California Contractors State License Board (CSLB)Verified 2026-11-08

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Questions

Asked before starting.

What is the C-53 license in California?

C-53 is CSLB's Swimming Pool Contractor classification (16 CCR §832.53). Builds swimming pools, spas and hot tubs, including pool solar heating.

Do I need a trade exam for the C-53 license?

Yes. CSLB requires the Swimming Pool (C-53) Examination in addition to the Law and Business exam.

How many years of experience does the C-53 license need?

As CSLB states it: At least 4 years journey-level/foreman/supervisor/contractor/owner-builder experience in the class within the last 10 years; up to 3 years credit for education/apprenticeship, at least 1 year must be practical. Source: 16 CCR §825 (2026 CSLB Law Book); CSLB Step 3 Qualifying Experience page.

Where is CSLB's official study guide for C-53?

CSLB publishes the C-53 study guide (form 13E-53 (03-2026)) as a free PDF at https://www.cslb.ca.gov/Resources/StudyGuides/C53StudyGuide.pdf. It lists the exam's content areas and their percentages.

Is the practice really free, or does it stop after a few questions?

All 340 questions, the timed mock and the report are free with no sign-up. A free account only adds saving your progress. The study guide book is sold separately, $24.99 one-time; nothing in the practice requires it.

Is your mock the same as the real CSLB C-53 Swimming Pool (Trade Exam)?

No. Ours is 100 questions in 210 minutes; the real exam is 210 minutes long. Use the mock for stamina and section timing, not as a score predictor.

What score do I need?

Not published by CSLB. CSLB: “You will be informed at the test site about the percentage of correct answers needed to pass each examination,” and, in Get Licensed to Build Q14, that the percentage “varies for each exam”. Passing candidates are never shown their own score. PrepPass states no passing score for this exam.

Is there a study guide for the CSLB C-53 Swimming Pool (Trade Exam)?

Yes. PrepPass sells CSLB C-53 Swimming Pool Study Guide — 2026 Edition, a PDF + EPUB download, $24.99 one-time; the practice on this page stays free without it. See the study guide →