California Building Moving And Demolition (C-21) Contractor Licensing Exam Prep Book Reference Package

California Building Moving And Demolition (C-21) Contractor Licensing Exam Prep Book Reference Package

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California Building Moving And Demolition (C-21) Contractor Licensing Exam Prep Book Reference Package

Prepare for the California Building Moving and Demolition (C-21) contractor licensing examination with a focused Book Reference Package covering planning and estimating, project preparation, building moving, structural demolition, hazardous-material considerations, traffic control, transportation requirements, storm water responsibilities, and construction safety.

The California C-21 classification covers contractors who raise, lower, crib, underpin, demolish, move, or remove structures, including their foundations. The classification does not include alterations, additions, repairs, or rehabilitation of permanently retained portions of those structures.

C-21 work can involve a combination of structural evaluation, heavy equipment, site preparation, demolition sequencing, transportation, temporary support, traffic control, debris handling, recycling, hazardous-material coordination, and safety planning. Effective exam preparation therefore requires candidates to understand both demolition work and the specialized procedures associated with moving or supporting structures.

The current California C-21 examination is divided into five major areas: Planning and Estimating; Project Preparation; Building Moving; Structure Demolition; and Safety. This reference package brings together California code materials, transportation references, Cal/OSHA safety materials, storm water information, and permitting resources to support preparation across those subjects.

The California C-21 contractor licensing examination is a closed-book examination. The references in this package are intended for preparation before test day so candidates can build familiarity with technical requirements, site procedures, equipment considerations, transportation issues, and safety practices before transitioning toward independent recall.

What You Get

  • California Building Code Reference: Supports preparation involving structural, demolition, building, and construction requirements.
  • California Green Building Standards Code: Supports review of construction waste, recycling, and environmentally related project requirements.
  • California Commercial Driver Handbook: Supports preparation involving commercial vehicle operation and transportation considerations.
  • California Vehicle Code: Supports review of vehicle, roadway, movement, and transportation requirements relevant to building-moving operations.
  • Cal/OSHA Safety References: Supports preparation involving construction safety, electrical hazards, equipment, PPE, demolition hazards, and worker protection.
  • Storm Water Program: Supports preparation involving storm water responsibilities, site controls, and environmental considerations.
  • Transportation Permits Manual: Supports study of transportation permits and movement requirements associated with oversized or specialized loads.

Exam Details

The California Contractors State License Board C-21 Building Moving and Demolition study guide applies to examinations scheduled on or after July 1, 2024. The examination is divided into five major sections:

  • Planning and Estimating: 25%
  • Project Preparation: 20%
  • Building Moving: 13%
  • Structure Demolition: 21%
  • Safety: 21%

Planning and Estimating represents approximately 25 percent of the examination and is the largest published category. Topics include evaluating plans and specifications, evaluating hazardous-material surveys, evaluating job-site readiness, determining job methods and equipment, and estimating project costs.

Candidates should understand how project documents affect demolition and moving operations. Plans and specifications can identify structural conditions, limits of work, utilities, access restrictions, retained portions of structures, transportation constraints, environmental requirements, and sequencing expectations.

Hazardous-material surveys are also important. Demolition work can encounter materials requiring specialized handling or removal before structural demolition begins. Candidates should understand the importance of identifying hazardous-material conditions during planning and coordinating project methods appropriately.

Job-site readiness can include access, equipment staging, overhead and underground utilities, adjacent structures, public areas, traffic conditions, debris handling, temporary support, environmental controls, and other site-specific conditions. A site that is not properly prepared can create significant hazards and project delays.

Determining job methods and equipment requires candidates to match the project conditions with appropriate moving, lifting, supporting, demolition, hauling, and site-preparation methods. Equipment selection can affect production, safety, access, sequencing, and project costs.

Project Preparation represents approximately 20 percent of the examination. Published topics include permitting and notification, mobilizing labor, equipment, and materials, developing recycling plans, and removing hazardous materials.

Permits and notifications can be important before demolition or building-moving operations begin. Projects may involve local permits, utility coordination, transportation permits, traffic-control requirements, environmental obligations, and other notifications depending on the work.

Mobilization includes bringing the appropriate workforce, equipment, materials, temporary controls, and support systems to the project. Candidates should understand that demolition and building-moving operations require careful organization before physical work starts.

Recycling plans can be an important part of demolition work. Construction and demolition debris may need to be separated, handled, recycled, transported, or disposed of according to project and regulatory requirements. The California Green Building Standards Code supports preparation involving construction waste and recycling considerations.

Building Moving represents approximately 13 percent of the examination. Published topics include moving preparation, determining weight and structural integrity, building raising and lowering, and building support and transportation.

Building-moving preparation requires candidates to consider structural condition, load paths, dimensions, weight, clearances, access, route conditions, support points, lifting locations, utilities, temporary bracing, and transportation requirements.

Determining the weight and structural integrity of a structure is critical before lifting or moving operations. Candidates should understand that inadequate evaluation can affect cribbing, jacking, support systems, equipment selection, transportation, and overall safety.

Building raising and lowering can involve jacks, cribbing, temporary supports, beams, blocking, and carefully sequenced operations. Candidates should understand the importance of stable support, controlled movement, load distribution, and coordinated procedures.

Transportation preparation can include route review, vehicle requirements, permits, clearances, traffic control, load dimensions, and movement restrictions. The California Commercial Driver Handbook, California Vehicle Code, and Transportation Permits Manual support preparation involving these areas.

Structure Demolition represents approximately 21 percent of the examination. Published topics include pre-demolition site preparation, demolition of single- and multi-story structures, separating demolished materials, transporting materials and debris, and cleaning and backfilling job sites.

Pre-demolition preparation may include utility shutdowns, hazardous-material coordination, site security, equipment access, exclusion zones, temporary controls, protection of adjacent property, and identification of portions of the structure that must remain.

Demolition methods should be selected according to structural conditions, height, materials, surrounding property, equipment access, debris handling, and safety requirements. Candidates should understand the importance of controlled sequencing and avoiding conditions that can create unplanned collapse.

Separating demolished materials can support recycling, disposal, salvage, and site-cleanup requirements. Candidates should understand practical handling of concrete, metal, wood, and other demolition debris as applicable to project requirements.

Transportation of materials and debris requires safe loading, vehicle operation, route compliance, and coordination with applicable transportation requirements. Final site work can include debris removal, grading, cleaning, and backfilling.

Safety represents approximately 21 percent of the examination. Published topics include job-site safety, personnel safety, implementing traffic controls, and personal protective equipment.

C-21 work can involve unstable structures, falling debris, heavy equipment, suspended loads, vehicle traffic, utility hazards, dust, sharp materials, elevated work, excavations, and public exposure. Candidates should understand how safety planning applies throughout moving and demolition operations.

The C-21 examination is multiple choice with four choices per question and one best answer. Some questions require mathematical computation, and a calculator is provided for applicable calculations.

Closed Book Test

The California Building Moving and Demolition (C-21) contractor licensing examination is a closed-book examination. No reference materials may be used during testing.

The books and materials in this package are intended for study before examination day. Candidates should use them to learn project-planning requirements, demolition practices, structural-moving considerations, transportation responsibilities, storm water requirements, and safety procedures.

As preparation progresses, candidates should practice identifying correct procedures without immediately consulting the references. Closed-book preparation should focus on understanding how site conditions, structural conditions, transportation requirements, equipment selection, and safety decisions affect one another.

Planning and Estimating represents approximately 25 percent of the examination, making it the largest category. Candidates should spend substantial preparation time evaluating plans, hazardous-material surveys, job-site readiness, equipment choices, work methods, and project costs.

Structure Demolition and Safety each represent approximately 21 percent, while Project Preparation represents approximately 20 percent. Together, these categories make up most of the examination, so preparation should include both technical demolition procedures and strong job-site safety awareness.

Licensing Steps

The California Contractors State License Board administers the C-21 Building Moving and Demolition contractor classification. Applicants pursuing this license must complete the qualification, application, examination, and license-issuance requirements that apply to their circumstances.

  1. Confirm the C-21 classification. Determine that the building moving or demolition work you intend to perform falls within the California C-21 scope.
  2. Meet applicable qualification requirements. The qualifying individual must satisfy the experience and qualification requirements applicable to the requested classification.
  3. Document qualifying work experience. Prepare the work-history information required through the contractor license application process.
  4. Submit the contractor license application. Complete the required applicant, business, qualifier, classification, and supporting information.
  5. Complete CSLB application review. CSLB determines which examinations and additional licensing requirements apply.
  6. Prepare for the C-21 trade examination. Study planning, project preparation, building moving, demolition, transportation, debris handling, traffic control, environmental responsibilities, and safety.
  7. Prepare for California Law and Business. Applicants required to test generally also prepare for the California Law and Business examination.
  8. Complete required examinations. Applicants required to test generally complete the applicable trade examination and Law and Business examination unless a waiver applies.
  9. Complete license-issuance requirements. Finish applicable bonding, fingerprinting, workers' compensation documentation, fees, and other requirements associated with license issuance.

State Requirements

The California C-21 Building Moving and Demolition classification authorizes work involving raising, lowering, cribbing, underpinning, demolishing, moving, and removing structures, including their foundations.

The classification does not include alterations, additions, repairs, or rehabilitation of permanently retained portions of structures. Candidates should understand this distinction when reviewing the scope of C-21 work.

Building-moving operations can require coordination with transportation and roadway requirements. Route planning, clearances, vehicle operation, traffic control, permits, and load movement can all affect how a structure is transported.

Demolition work can also involve construction and demolition debris, recycling plans, storm water controls, hazardous-material coordination, and safe transportation of materials away from the site.

Candidates should understand that hazardous-material removal can involve requirements beyond ordinary structural demolition. Proper surveys, notifications, sequencing, and qualified handling may be necessary before demolition operations proceed.

Reference Books

  • 2025 California Building Code. California Code of Regulations, Title 24
    Supports preparation involving structural and building requirements, demolition conditions, site considerations, and construction requirements relevant to C-21 work.
  • 2025 California Green Building Standards Code. California Code of Regulations, Title 24
    Supports preparation involving construction and demolition waste, recycling, material diversion, and environmentally related project requirements.
  • California Commercial Driver Handbook
    Supports preparation involving commercial vehicle operation, roadway safety, vehicle handling, and transportation considerations relevant to building-moving and debris-hauling operations.
  • California Vehicle Code
    Supports study of vehicle operation, roadway requirements, transportation rules, movement restrictions, and other transportation topics relevant to C-21 work.
  • Cal/OSHA General Industry & Electrical Safety Orders
    Supports preparation involving workplace safety, electrical hazards, equipment, personal protective equipment, material handling, and employer safety responsibilities.
  • Cal/OSHA Construction & Electrical Safety Orders
    Supports construction-site safety involving demolition hazards, heavy equipment, elevated work, electrical exposure, PPE, material handling, access, and other job-site risks.
  • Storm Water Program
    Supports preparation involving storm water responsibilities, site controls, pollution prevention, runoff management, and environmental considerations associated with demolition and site work.
  • Transportation Permits Manual
    Supports study of transportation permits, oversized or specialized load movement, route requirements, and permit considerations associated with moving structures.

Test Information and Study Materials

Prioritize Planning and Estimating. At approximately 25 percent, it is the largest C-21 examination category. Practice evaluating plans, site conditions, hazardous-material surveys, methods, equipment, and project costs.

Study project preparation carefully. Permits, notifications, equipment mobilization, recycling plans, and hazardous-material removal can determine whether demolition or moving work begins safely and legally.

Understand building-moving fundamentals. Review structural integrity, estimated weight, lifting points, cribbing, support systems, raising, lowering, transportation, route conditions, and clearances.

Study demolition sequencing. Candidates should understand pre-demolition preparation and the importance of controlled demolition methods for single- and multi-story structures.

Review debris handling and recycling. Material separation, recycling, hauling, disposal, cleanup, and backfilling are part of structure-demolition preparation.

Include transportation requirements. Use the Commercial Driver Handbook, Vehicle Code, and Transportation Permits Manual to reinforce vehicle, route, permit, and roadway considerations.

Study traffic control as a safety subject. Moving structures and transporting demolition materials may affect public roads and job-site traffic. Candidates should understand the importance of protecting workers and the public.

Include storm water and site controls. Demolition and site work can expose soil and debris to runoff. Review environmental controls and storm water responsibilities as part of project preparation.

Build closed-book recall. Use the references to understand unfamiliar subjects, then practice identifying correct procedures without depending on the books.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep supports California C-21 contractor candidates through organized study guidance, trade-focused review, practice-oriented preparation, reference navigation when applicable, and a structured approach to Building Moving and Demolition exam topics.

The C-21 reference package helps candidates organize a specialized trade into manageable areas. Planning and Estimating, Project Preparation, Building Moving, Structure Demolition, and Safety can each receive focused study rather than being approached as one broad subject.

The California Building Code provides important construction and structural context, while the California Green Building Standards Code supports preparation involving construction and demolition waste and recycling requirements.

The California Commercial Driver Handbook, California Vehicle Code, and Transportation Permits Manual help candidates review the transportation side of C-21 work. This is particularly important when structures or oversized loads must move along public roads.

The Storm Water Program supports preparation involving site runoff and environmental controls. These topics can become important when demolition, debris removal, grading, or backfilling affects exposed site conditions.

The Cal/OSHA references support preparation involving demolition hazards, heavy equipment, PPE, electrical exposure, traffic, falling materials, unstable structures, and other construction safety concerns.

Practice-oriented preparation can include evaluating plans, selecting equipment, planning demolition sequences, identifying hazardous conditions, reviewing cribbing and support concepts, considering transport routes, separating debris, and selecting appropriate safety measures.

Because the C-21 examination is closed book, 1 Exam Prep encourages candidates to move from reference-supported learning toward independent recall and application. The goal is to develop an organized understanding of project planning, building moving, demolition, transportation, environmental responsibilities, and safety.

FAQ

Is the California C-21 examination closed book?

Yes. The California Building Moving and Demolition C-21 contractor licensing examination is a closed-book examination.

What is the largest C-21 examination category?

Planning and Estimating is the largest published category at approximately 25 percent.

How much of the C-21 examination covers project preparation?

Project Preparation represents approximately 20 percent and includes permitting and notification, mobilization, recycling plans, and hazardous-material removal.

Does the C-21 exam cover building moving?

Yes. Building Moving represents approximately 13 percent of the examination and includes moving preparation, structural integrity, weight, raising, lowering, support, and transportation.

How much of the C-21 exam covers demolition?

Structure Demolition represents approximately 21 percent and includes site preparation, demolition, material separation, transportation, cleanup, and backfilling.

How much of the C-21 exam covers safety?

Safety represents approximately 21 percent and includes job-site safety, personnel safety, traffic control, and personal protective equipment.

Does the C-21 exam include hazardous-material topics?

Yes. Planning and Estimating includes evaluating hazardous-material surveys, and Project Preparation includes hazardous-material removal.

Does the C-21 exam cover transportation permits?

Transportation is part of building-moving preparation, and the Transportation Permits Manual supports study of permit and movement considerations associated with specialized loads.

Why is the California Commercial Driver Handbook included?

It supports preparation involving commercial vehicle operation and roadway safety relevant to moving structures and transporting demolition materials.

Why is the California Vehicle Code included?

It supports study of vehicle and roadway requirements that can affect building-moving and debris-transport operations.

Does C-21 preparation include recycling and demolition debris?

Yes. Project Preparation includes recycling plans, while Structure Demolition includes separating and transporting demolished materials and debris.

Does the C-21 classification include foundations?

Yes. The C-21 scope includes moving, removing, or demolishing structures, including their foundations.

Does the C-21 classification include repairs to retained portions of a structure?

No. The C-21 classification does not include alterations, additions, repairs, or rehabilitation of permanently retained portions of structures.

Why are Cal/OSHA references important for C-21 preparation?

Building moving and demolition can involve unstable structures, heavy equipment, falling debris, electrical hazards, traffic, elevated work, and other serious job-site risks. The Cal/OSHA references support preparation for these safety subjects.

Why use reference materials for a closed-book examination?

The references help candidates build technical understanding before testing. Candidates can use them to learn project planning, demolition, transportation, structural-moving, environmental, and safety concepts before transitioning toward independent recall.