California General Manufactured Housing (C-47) Contractor Licensing Exam Prep Book Reference Package

California General Manufactured Housing (C-47) Contractor Licensing Exam Prep Book Reference Package

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California General Manufactured Housing (C-47) Contractor Licensing Exam Prep Book Reference Package

Prepare for the California General Manufactured Housing (C-47) contractor licensing examination with a focused book reference package covering manufactured home installation, site preparation, support and foundation systems, utility connections, accessory structures, repairs, transportation considerations, planning, estimating, and job-site safety. This package brings together technical references that can help candidates strengthen their understanding of the major trade areas associated with the C-47 examination.

The California C-47 General Manufactured Housing classification covers contractors who install, alter, repair, or prepare manufactured homes, mobilehomes, and multifamily manufactured homes for moving. The classification also includes accessory buildings or structures and foundations associated with those homes. Recreational vehicles, commercial coaches, and factory-built housing are not included in the C-47 manufactured housing classification.

A C-47 contractor may also provide utility services on a single-family individual site placement. For this classification, utility services include connecting gas, water, sewer, and electrical utilities to the home. This makes the C-47 trade broad in scope, combining site work, foundations, structural setup, utility coordination, accessory construction, repair, and safety.

The California General Manufactured Housing (C-47) trade examination is a closed-book examination. Candidates cannot use reference materials during the test, so the books in this package are intended for preparation before exam day. Candidates should use the references to build practical understanding of manufactured housing standards, installation procedures, site conditions, support systems, transportation requirements, repairs, and safety, then work toward recalling and applying that information without the books.

This reference package can be useful for candidates with different types of manufactured housing experience. Someone experienced in home setup and blocking may need more preparation involving accessory structures, federal construction standards, transportation rules, or repairs. A contractor with strong site-development experience may need additional review of joining manufactured home sections, utility connections, foundations, or manufactured housing regulations.

What You Get

  • 2025 California Building Code, California Code of Regulations, Title 24 — a California construction code reference supporting study of building requirements, foundations, accessory structures, site conditions, and construction principles that can affect manufactured housing work.
  • California Vehicle Code — a state reference supporting preparation involving transportation, roadway conditions, vehicle requirements, and movement considerations associated with manufactured homes.
  • Code of Federal Regulations, Title 24, Housing and Urban Development, Part 3280 — a federal manufactured housing reference covering construction and safety standards applicable to manufactured homes.
  • Manufactured Home Installation Training Manual — a specialized training reference supporting study of manufactured home setup, foundations, supports, anchoring, joining sections, utility connections, and installation procedures.
  • California Code of Regulations, Title 25, Housing and Community Development, Chapter 2 — a California manufactured housing reference supporting preparation involving installation, alteration, repair, accessory structures, and related state requirements.
  • Cal/OSHA General Industry & Electrical Safety Orders — a California safety reference supporting review of employee protection, electrical hazards, tools, equipment, and workplace safety.
  • Cal/OSHA Construction & Electrical Safety Orders — a construction safety reference supporting preparation involving excavation, lifting, electrical hazards, access, personal protective equipment, and job-site safety.

Exam Details

The California Contractors State License Board divides the General Manufactured Housing (C-47) trade examination into six major sections. The approximate percentages provide a useful structure for organizing study time.

  • Planning and Estimating — 15%
    This section includes project scope planning, lot evaluation, and calculating costs and materials for manufactured housing projects.
  • Site Preparation — 17%
    This area covers lot development and preparation associated with transporting and placing manufactured homes.
  • Manufactured Home Installation — 22%
    This section includes support and foundation systems, maneuvering and joining manufactured home sections, and connecting and sealing procedures.
  • Accessory Installation — 12%
    This area includes installing home accessories and building accessory structures associated with manufactured homes.
  • Repairs — 13%
    This section includes troubleshooting and repairing manufactured homes and related systems.
  • Safety — 21%
    Safety topics include employee safety, job-site and equipment safety, and recognition of job-site hazards.

The C-47 trade examination uses a multiple-choice format with four choices for each question and one best answer. Some questions require mathematical computation, and a calculator is provided during the examination.

There is no penalty for guessing. Candidates should attempt every question and carefully read all answer choices before selecting the best response. Manufactured Home Installation represents approximately 22% of the examination, making it the largest individual technical section, while Safety represents approximately 21%.

Closed Book Test

The California General Manufactured Housing (C-47) trade examination is a closed-book examination. Reference materials cannot be used during the test.

The listed California, federal, installation, transportation, and safety references should therefore be used during preparation rather than relied upon during the examination. Candidates should work toward understanding installation sequences, support systems, utility connections, regulations, repair methods, and safety practices well enough to apply them without searching through a manual.

Active recall can be especially useful for manufactured housing preparation. After reviewing a home installation procedure, close the reference and describe the process from site preparation through placement, support, leveling, joining sections, anchoring, sealing, utility connections, and final checks.

The same method can be used for repairs and accessory structures. Study the relevant procedure, put the book aside, and explain the problem, likely causes, required work, and safety considerations from memory.

Licensing Steps

The California Contractors State License Board administers contractor licensing and the C-47 General Manufactured Housing classification. Applicants generally move through qualification, application, required training, examination, and license-issuance requirements.

  1. Meet the qualifying experience requirement. The qualifying individual generally needs at least four years of qualifying trade experience within the applicable period established by CSLB.
  2. Complete federally approved installer training. Before obtaining an original C-47 classification, the applicant must complete federally approved initial installer training and submit a Certificate of Completion from a qualified trainer approved by the U.S. Department of Housing and Urban Development. Existing C-47 license holders are exempt from this training requirement.
  3. Submit the appropriate CSLB application. Applicants who are required to take examinations must complete the applicable contractor license examination application and provide the requested experience and training documentation.
  4. Complete applicable fingerprint requirements. Applicants subject to fingerprinting must complete the required background-check process according to CSLB instructions.
  5. Complete required examinations. Unless an applicable examination waiver applies, the qualifying individual generally must pass the C-47 General Manufactured Housing trade examination and the California Law and Business examination.
  6. Complete license-issuance requirements. Applicants must satisfy applicable bonding, workers' compensation, documentation, fees, and other CSLB requirements before an active contractor license can be issued.

Individual licensing circumstances can vary according to business structure, qualifying individual, prior California licensing history, and examination waiver eligibility.

State Requirements

The C-47 classification covers work on manufactured homes, mobilehomes, and multifamily manufactured homes, including associated accessory buildings or structures and foundations. It also includes preparing manufactured homes for moving.

The classification does not include recreational vehicles, commercial coaches, or factory-built housing. Candidates should understand these scope boundaries when preparing for licensing and trade questions.

For a single-family individual site placement, a C-47 contractor may provide utility services. These utility services include connecting gas, water, sewer, and electrical utilities to the manufactured home.

California generally requires the qualifying individual to document four years of qualifying experience. Eligible education, apprenticeship training, or technical instruction may receive credit toward part of the experience requirement under CSLB rules, while practical trade experience remains an important component of qualification.

A special requirement applies to applicants seeking an original C-47 classification. Before obtaining the classification, the applicant must complete federally approved initial installer training. A Certificate of Completion from a qualified HUD-approved trainer must be submitted with the application. Existing C-47 license holders are exempt from the initial training requirement.

Applicants who are required to take examinations generally must complete both the C-47 General Manufactured Housing trade examination and the California Law and Business examination unless an applicable examination waiver is available.

California contractor licensing also includes applicable bonding and workers' compensation requirements. Applicants must complete the license-issuance requirements that apply to their business structure and employment circumstances before operating under an active license.

Reference Books

The following references support preparation for the California C-47 General Manufactured Housing trade examination. Because the examination is closed book, these materials are intended for preparation before test day.

  • 2025 California Building Code, California Code of Regulations, Title 24
    A California construction code reference supporting review of building requirements, foundations, accessory structures, structural considerations, and related construction principles.
  • California Vehicle Code
    A state transportation reference supporting preparation involving manufactured home movement, vehicles, roadway operations, transportation considerations, and related safety requirements.
  • Code of Federal Regulations, Title 24, Housing and Urban Development, Part 3280
    A federal reference containing manufactured home construction and safety standards. It supports preparation involving the construction, performance, and safety requirements applicable to manufactured housing.
  • Manufactured Home Installation Training Manual
    A specialized installation resource supporting study of site preparation, support systems, foundations, anchoring, leveling, joining sections, utility connections, weatherproofing, and final installation procedures.
  • California Code of Regulations, Title 25, Housing and Community Development, Chapter 2
    A California manufactured housing reference supporting preparation involving installation, alteration, repair, accessory structures, foundations, and state housing requirements.
  • Cal/OSHA General Industry & Electrical Safety Orders
    A California workplace safety reference supporting review of electrical hazards, tools, employee protection, equipment, and occupational safety requirements.
  • Cal/OSHA Construction & Electrical Safety Orders
    A construction safety reference useful for studying equipment, lifting operations, electrical hazards, access, personal protective equipment, excavation, and general job-site safety.

Test Information and Study Materials

For Planning and Estimating, candidates should review project scope, lot conditions, home dimensions, foundation or support requirements, accessory structures, utility locations, equipment needs, materials, labor, and transportation considerations.

Lot evaluation is especially important because the condition of the site can affect installation methods. Review access, grade, drainage, available working space, utility locations, support conditions, home placement, equipment access, and surrounding structures.

Estimating preparation should include support materials, foundation components, anchors, utility connection materials, sealing materials, accessory structures, labor, equipment, and other project needs. Practice working with dimensions, quantities, areas, lengths, and basic job-cost calculations.

For Site Preparation, review how a lot is prepared before a manufactured home arrives. Candidates should understand access, grading, drainage, utilities, foundation or support locations, equipment staging, and safe movement of the home onto the site.

Preparing for transport is also part of the examination content. Review the conditions that affect moving manufactured homes, including site access, roadway considerations, preparation of the home, transportation safety, and coordination of equipment.

For Manufactured Home Installation, study support and foundation systems carefully. Candidates should understand how the home is supported, leveled, stabilized, and secured once it reaches the site.

Maneuvering and joining sections are also major topics. Multifamily or multi-section manufactured homes require accurate alignment and connection. Review how individual sections are positioned, joined, sealed, and integrated into the completed home.

Connecting and sealing procedures should receive focused study. Weather protection, structural connection, alignment, utility continuity, and protection of interior spaces can all depend on correct joining and sealing.

Utility connections are also important because a C-47 contractor may connect gas, water, sewer, and electrical utilities on a single-family individual site placement. Candidates should understand the role of each connection within the complete installation and recognize the safety concerns associated with utility work.

For Accessory Installation, review home accessories and accessory structures associated with manufactured housing. Depending on the project, this can include structural or site components installed after the home is placed.

Accessory work should be coordinated with the manufactured home, foundation, site conditions, drainage, access, and applicable construction requirements. Candidates should understand that accessory structures can create additional loads, attachment conditions, and safety considerations.

For Repairs, develop a logical troubleshooting process. Manufactured home problems may involve structural movement, supports, seals, utility connections, exterior components, accessory structures, or other parts of the installation.

Instead of replacing components immediately, candidates should identify the symptom, evaluate likely causes, inspect the relevant systems, and select a corrective action that addresses the underlying problem.

Repairs may also involve alterations to existing manufactured homes. Use the California and federal manufactured housing references to strengthen understanding of the standards and procedures affecting repair and alteration work.

For Safety, study employee safety, job-site safety, equipment safety, and site hazards. Manufactured housing projects can involve heavy sections, lifting equipment, transportation vehicles, electrical utilities, gas connections, excavation, elevated work, and changing site conditions.

Equipment movement deserves particular attention. Workers may operate around trucks, jacks, lifting systems, cranes, towing equipment, or other machinery used to position the home. Safe communication, equipment setup, work-zone control, and worker positioning are important.

Electrical and utility hazards should also be included in preparation. Connecting or working near electrical service, gas systems, water lines, and sewer connections requires attention to safe procedures and protection of workers and occupants.

Personal protective equipment should be appropriate for the task being performed. Manufactured housing work can expose workers to sharp materials, lifting hazards, falling objects, electrical hazards, equipment movement, and other construction risks.

Use the Manufactured Home Installation Training Manual as a core technical resource for installation procedures. The federal Part 3280 standards can strengthen understanding of manufactured home construction and safety requirements, while California Title 25 can support preparation involving state-specific manufactured housing rules.

The California Building Code can help reinforce construction principles affecting foundations and accessory structures, while the California Vehicle Code supports transportation-related preparation. The Cal/OSHA references can strengthen workplace and electrical safety study.

Because the C-47 examination is closed book, active recall should be part of every study session. After reviewing a procedure, close the reference and explain the sequence in your own words. Work through site preparation, support installation, section joining, utility connections, repairs, and safety scenarios without immediately returning to the book.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep helps candidates prepare for the California General Manufactured Housing (C-47) contractor examination through organized study guidance, trade-focused review, and structured reference preparation. The package brings together resources covering manufactured home installation, site preparation, foundations, utility connections, accessory structures, repairs, transportation, and safety.

Reference navigation can help candidates concentrate on weaker subjects. Someone who needs more preparation involving manufactured home construction standards can focus on the federal HUD material, while candidates needing additional installation review can spend more time with the Manufactured Home Installation Training Manual and California Title 25 requirements.

Trade-focused preparation also helps candidates understand the entire installation process. A manufactured housing project begins with planning and site evaluation, continues through transportation and placement, moves into foundations, supports, joining, sealing, and utility connections, and may later involve accessory structures, alterations, maintenance, or repair.

Practice-oriented preparation can help candidates apply technical knowledge instead of simply memorizing terminology. C-47 questions may involve lot evaluation, material calculations, foundation systems, joining manufactured home sections, accessory installation, troubleshooting, transportation, or safety.

The reference package can also help candidates whose field experience is concentrated in one part of the trade. An installer may need more review of federal standards or transportation requirements, while someone experienced with site work may need additional preparation involving home joining, sealing, utility connections, or repairs.

The objective is to support consistent preparation through organized reference study, trade knowledge, calculations, active recall, and safety review. No exam preparation package can guarantee a passing result or contractor license approval, but disciplined study can help candidates approach the California C-47 examination with stronger familiarity with the material.

FAQ Section

What does the California C-47 General Manufactured Housing classification cover?

The C-47 classification covers installation, alteration, repair, and preparation for moving manufactured homes, mobilehomes, and multifamily manufactured homes, including accessory buildings or structures and foundations.

Does the C-47 classification include recreational vehicles?

No. Recreational vehicles, commercial coaches, and factory-built housing are not included within the C-47 General Manufactured Housing classification.

Is the California C-47 trade examination open book?

No. The California General Manufactured Housing (C-47) trade examination is closed book. Reference materials cannot be used during the test.

What subjects are covered on the C-47 examination?

The examination covers Planning and Estimating, Site Preparation, Manufactured Home Installation, Accessory Installation, Repairs, and Safety.

What is the largest section of the C-47 examination?

Manufactured Home Installation is the largest individual technical section at approximately 22% of the examination, followed closely by Safety at approximately 21%.

Does the C-47 exam cover foundations and support systems?

Yes. Support and foundation systems are included in the Manufactured Home Installation section of the examination.

Does the C-47 exam include accessory structures?

Yes. Accessory Installation includes installing home accessories and building accessory structures associated with manufactured housing.

Can a C-47 contractor connect utilities?

Yes. On a single-family individual site placement, a C-47 contractor may connect gas, water, sewer, and electrical utilities to the manufactured home.

Is special installer training required for a new C-47 classification?

Yes. Before obtaining an original C-47 classification, the applicant must complete federally approved initial installer training and submit a Certificate of Completion from a qualified HUD-approved trainer. Existing C-47 license holders are exempt from this initial training requirement.

Does the C-47 examination include repairs?

Yes. Repairs represent approximately 13% of the examination and include troubleshooting and repairing manufactured homes and related systems.

Do C-47 applicants also take the California Law and Business examination?

Applicants who are required to take examinations generally must pass both the C-47 General Manufactured Housing trade examination and the California Law and Business examination unless an applicable examination waiver applies.

How should I use the C-47 reference package?

Organize your preparation around planning, site preparation, manufactured home installation, accessory structures, repairs, and safety. Use the federal, California, installation, transportation, and Cal/OSHA references for deeper study, then practice recalling procedures, calculations, and safety concepts without using the books.