- CASp Exam Domains Overview
- Domain 1: General Knowledge and Skills
- Domain 2: Prescriptive Requirements of Accessibility Codes
- Domain 3: Review of Accessible Features
- Domain 4: Field Investigations
- Domain 5: Project Scoping and Design Awareness
- Exam Structure and Format
- Study Strategies by Domain
- Practice and Preparation Tips
- Frequently Asked Questions
CASp Exam Domains Overview
The California Certified Access Specialist (CASp) examination is structured around five comprehensive content domains that test your knowledge and skills in accessibility compliance, building codes, and field investigation techniques. Understanding these domains is crucial for exam success and professional competency as a CASp certified professional.
The California Division of the State Architect (DSA) has carefully crafted these domains to reflect the real-world responsibilities of accessibility specialists. Each domain carries specific weight on the examination, and mastering all five areas is essential for passing both parts of the assessment.
Beginning with the February 2026 administration, the CASp examination tests to the 2025 California Building Code. This represents a significant update that affects content across all five domains, particularly Domain 2 which focuses heavily on prescriptive requirements.
The examination format consists of two distinct parts: Part 1 is an open-book plan review exam lasting approximately 2 hours, while Part 2 is a closed-book examination taking about 1.5 hours. This dual format means that different domains may be emphasized in each part, requiring varied preparation strategies.
Domain 1: General Knowledge and Skills
Domain 1 serves as the foundation for all other domains, testing your fundamental understanding of accessibility principles, legal frameworks, and professional responsibilities. This domain encompasses the broadest range of topics and requires comprehensive knowledge of disability rights legislation, accessibility standards history, and professional ethics.
Core Components of Domain 1
The general knowledge component covers the Americans with Disabilities Act (ADA), California Building Code accessibility requirements, and the interplay between federal and state regulations. You'll need to understand the historical context of accessibility legislation, including the evolution of standards and the reasoning behind specific requirements.
Professional skills within this domain include report writing, communication with clients and stakeholders, and understanding the legal implications of accessibility assessments. The examination tests your ability to interpret complex regulations and communicate findings effectively to various audiences.
Domain 1 requires detailed understanding of legal precedents, enforcement mechanisms, and liability issues. This isn't just about memorizing code sections-you need to understand how accessibility law applies in real-world scenarios.
For comprehensive coverage of this domain's requirements and study strategies, review our detailed CASp Domain 1 study guide which provides specific examples and practice scenarios.
Study Focus Areas
- Federal accessibility legislation (ADA, Section 504, Fair Housing Act)
- California state accessibility requirements and enforcement
- Professional ethics and standards of practice
- Report writing and documentation standards
- Client communication and consultation skills
- Understanding of construction and design processes
Domain 2: Prescriptive Requirements of Accessibility Codes
Domain 2 represents the technical heart of the CASp examination, focusing on specific measurable requirements within accessibility codes and standards. This domain requires precise knowledge of dimensions, percentages, tolerances, and technical specifications found in the California Building Code Chapter 11A and related standards.
The prescriptive requirements cover everything from door width specifications to parking space dimensions, ramp slopes to accessible route requirements. This domain emphasizes exact measurements and technical compliance rather than general principles.
Technical Specifications Mastery
Success in Domain 2 requires memorization of hundreds of specific measurements and requirements. You'll need to know not just the standard requirements, but also exceptions, alternatives, and special conditions that modify basic rules.
| Element Type | Key Measurements | Common Exceptions |
|---|---|---|
| Door Openings | 32" minimum clear width | Existing buildings, closets |
| Ramp Slopes | 1:20 maximum running slope | Curb ramps, existing conditions |
| Parking Spaces | 8' wide, 20' long minimum | Van spaces, parallel spaces |
| Counter Heights | 28" - 34" maximum | Different occupancy types |
The complete Domain 2 study guide provides detailed coverage of all technical requirements, including memory techniques for retaining complex specifications.
Domain 2 questions often hinge on precise measurements. A difference of half an inch can determine whether a feature complies with accessibility requirements. Practice with exact specifications, not rounded numbers.
Code Organization and Navigation
Understanding how accessibility codes are organized helps you locate information quickly during the open-book portion of the exam. The California Building Code Chapter 11A follows a logical structure, but knowing the organization helps you find specific requirements efficiently.
Domain 3: Review of Accessible Features in Design and Construction Documents
Domain 3 tests your ability to analyze architectural plans, construction drawings, and specifications to identify accessibility compliance issues. This practical domain requires visual interpretation skills and the ability to mentally translate two-dimensional drawings into three-dimensional accessible spaces.
Plan review skills form a critical component of CASp work, as you'll frequently need to evaluate proposed designs before construction begins. This proactive approach prevents costly modifications later in the construction process.
Drawing Interpretation Skills
Successful plan review requires understanding architectural drawing conventions, symbols, and notation systems. You must be able to identify potential accessibility barriers that may not be obvious from drawings alone, considering how spaces will function for people with various types of disabilities.
The examination includes actual construction drawings and plans, testing your ability to identify compliance issues and suggest appropriate modifications. This requires both technical knowledge from Domain 2 and practical application skills unique to Domain 3.
Plans show two-dimensional representations, but accessibility compliance occurs in three-dimensional space. You must visualize how someone using a wheelchair, walker, or other assistive device will navigate the actual built environment.
Our comprehensive Domain 3 preparation guide includes sample plans and detailed analysis techniques for identifying common compliance issues.
Common Plan Review Challenges
- Identifying accessible routes through complex floor plans
- Calculating actual clear widths considering door swings and obstacles
- Evaluating toilet room layouts for maneuvering clearances
- Assessing parking lot designs for accessible space distribution
- Reviewing elevation changes and ramp configurations
- Analyzing signage placement and visibility
Domain 4: Field Investigations
Domain 4 focuses on hands-on assessment techniques for evaluating existing buildings and facilities. This practical domain tests your ability to conduct thorough accessibility audits, use measuring tools effectively, and identify barriers that may not be apparent from drawings alone.
Field investigation skills distinguish experienced CASp professionals from those with only theoretical knowledge. Real-world conditions often differ from construction documents, requiring adaptive assessment techniques and practical problem-solving abilities.
Investigation Methodology
Systematic field investigations follow established protocols to ensure comprehensive coverage of all accessibility elements. The examination tests your knowledge of proper investigation sequences, documentation techniques, and measurement procedures.
Effective field investigations require understanding how different disabilities affect building use. You must evaluate facilities from multiple perspectives, considering mobility impairments, vision limitations, hearing disabilities, and cognitive considerations.
Field investigations often involve accessing areas under construction, around equipment, or in potentially hazardous conditions. Domain 4 includes safety protocols and risk assessment procedures that protect both investigators and building occupants.
The detailed Domain 4 study resource covers investigation techniques, measurement tools, and documentation standards used by professional CASp practitioners.
Measurement Tools and Techniques
Accurate measurements form the foundation of reliable field investigations. You'll need to know how to properly use various measuring devices and understand the limitations and appropriate applications of different tools.
- Digital levels for slope measurements
- Tape measures for clear width and reach range assessments
- Pressure gauges for door opening force evaluation
- Sound level meters for assistive listening system verification
- Light meters for illumination level assessment
- Mobile apps and digital tools for field documentation
Domain 5: Project Scoping and Accessibility Design Awareness
Domain 5 addresses the business and project management aspects of accessibility consulting. This domain tests your understanding of how to scope projects appropriately, estimate time and resource requirements, and integrate accessibility considerations into larger design and construction processes.
Project scoping requires understanding the relationship between different project phases and how accessibility requirements apply differently during new construction, alterations, and renovations. The examination tests your ability to identify when accessibility upgrades are triggered and to what extent compliance is required.
Alteration and Addition Requirements
California accessibility law includes specific provisions for alterations and additions that differ significantly from new construction requirements. Understanding these nuanced requirements is essential for proper project scoping and cost estimation.
The path of travel requirements, 20% rule, and disproportionality provisions create complex scenarios that require careful analysis. Domain 5 tests your ability to navigate these requirements and provide accurate guidance to clients.
Domain 5 recognizes that CASp professionals operate in a business environment. You need to understand project economics, client relationships, and how accessibility requirements affect project timelines and budgets.
For comprehensive coverage of project scoping principles and design integration strategies, consult our Domain 5 detailed guide which includes real-world project examples and case studies.
Exam Structure and Format
Understanding how the five domains are distributed across the two-part examination format helps guide your preparation strategy. Part 1's open-book format allows reference to codes and standards, while Part 2's closed-book format requires memorization of key facts and procedures.
The modified Angoff method used to set passing scores means that the examination difficulty is calibrated to professional competency standards rather than arbitrary percentage scores. This competency-based approach emphasizes thorough understanding over test-taking strategies.
If you're wondering about the overall challenge level, our analysis of CASp exam difficulty provides realistic expectations and preparation recommendations based on the domain structure.
Domain Distribution Strategy
While DSA doesn't publish exact domain weightings, understanding the examination structure helps prioritize study time effectively. Domains 2 and 3 typically receive heavy emphasis due to their technical nature and practical application requirements.
The comprehensive CASp preparation strategy outlines how to balance study time across all five domains while focusing on your individual strengths and weaknesses.
Study Strategies by Domain
Each domain requires different preparation approaches based on the type of knowledge tested. Technical domains benefit from repetitive practice, while conceptual domains require deep understanding and application skills.
Successful candidates typically spend 3-6 months preparing for the examination, with study time distributed across all domains. The current pass rate data shows that thorough preparation across all domains significantly improves success probability.
While studying domains separately is useful for organization, the examination tests integrated knowledge. Real-world scenarios combine elements from multiple domains, requiring comprehensive understanding rather than compartmentalized knowledge.
Domain-Specific Study Techniques
Domain 1: Focus on understanding legal principles and professional standards through case studies and regulatory analysis.
Domain 2: Create measurement flashcards and practice with actual building elements to reinforce technical specifications.
Domain 3: Practice plan review using actual construction drawings and develop systematic evaluation checklists.
Domain 4: Gain hands-on experience with measurement tools and practice field investigation techniques in real buildings.
Domain 5: Study project case studies and develop understanding of construction project phases and accessibility trigger points.
Practice and Preparation Tips
Effective preparation combines theoretical study with practical application across all five domains. The examination tests real-world competency, so hands-on experience with accessibility assessments provides valuable preparation.
Practice tests help identify knowledge gaps and build familiarity with examination question formats. Our practice test platform includes questions covering all five domains with detailed explanations linking back to specific code requirements and professional standards.
Consider the total investment required for CASp certification, including study materials, examination fees, and continuing education requirements. This investment perspective helps maintain motivation during intensive preparation periods.
The most effective preparation involves applying domain knowledge to actual buildings and projects. Volunteer for accessibility assessments or shadow experienced CASp professionals to see how domain concepts apply in practice.
Regular practice with realistic exam questions helps build confidence and identifies areas needing additional study. Focus on questions that integrate multiple domains, as these reflect the examination's emphasis on comprehensive competency.
Review our comprehensive practice questions to test your knowledge across all five domains and identify specific areas requiring additional preparation time.
While DSA doesn't publish exact weightings, Domains 2 and 3 typically receive significant emphasis due to their technical nature and direct application to CASp professional responsibilities. However, all five domains are important for passing the examination.
Part 1 (open-book) tends to emphasize Domains 2, 3, and 5 where code reference is valuable. Part 2 (closed-book) focuses more on Domains 1 and 4 which require memorized knowledge of procedures and principles. However, all domains may appear in both parts.
While field experience isn't strictly required, Domain 4 tests practical investigation skills that are difficult to master without hands-on practice. Many successful candidates gain experience through volunteer work or shadowing experienced professionals.
Domain content evolves with building code updates. The 2025 California Building Code implementation affects all domains but particularly impacts Domain 2's technical requirements. Stay current with DSA announcements regarding examination content updates.
While balanced preparation is important, focus additional study time on domains where you have less background knowledge. Most candidates need extra time on Domain 2 due to its technical complexity and memorization requirements.
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