IDEX California Practice Test 2026 — Free IDEX California Exam Prep Questions
The IDEX California is the exam interior designers take to become a Certified Interior Designer (CID) in California. It focuses on the California Building Standards Code (Title 24), California accessibility rules, and the business, legal and ethical rules that apply to designers in the state. Our original scenario questions follow CCIDC's domain classification system, and every answer choice is explained.
A new single-story retail building has four public entrances, all at grade. Under CBC Chapter 11B, how many of these entrances must be accessible?
IDEX California format, scoring & key facts
Secure internet-based computer testing through Meazure Learning/ProctorU, at test centers in California and other locations, or by live remote proctoring from home. Closed book: no code books are allowed, and calculators and watches are prohibited. Based on the most recently adopted California Building Code.
| Questions | 150 multiple-choice, four choices each |
|---|---|
| Time | 3 hours |
| Code basis | Most recently adopted California Building Code (2025 Title 24, effective January 1, 2026) |
| References | Closed book; needed code tables and drawings are shown on screen |
| Calculator | Not allowed |
| Scoring | One point per question, no guessing penalty; pass/fail by modified Angoff |
| Results | Immediate, starting with the Fall 2026 window |
| Windows | May 1–31 and October 1–31 |
| Fee | $800 (Paths 1–2) or $700 (Paths 3–4); retake $400 |
| Delivery | Meazure Learning/ProctorU test centers or live remote proctoring |
Facts last verified Oct 18, 2026. Source: ccidc.org/wp-content/uploads/2026/03/2026-IDEX-Study-Guide.pdf. Always confirm details with CCIDC before your exam.
When can you take the IDEX California?
Two 31-day windows a year: Spring (May 1–31) and Fall (October 1–31). Application deadlines are March 1 for Spring and August 1 for Fall; after approval you schedule a date through the Notice to Schedule, at least 7 days ahead.
What the IDEX California covers
Every PrepBanq IDEX California test covers the official content areas; the test owner does not publish weights.
| Content domain | Our practice questions |
|---|---|
Legal Requirements and ResponsibilitiesDispute resolution, B&P Code 5800–5812 and 5537/5538, contractor licensing and mechanic's liens, the right of rescission, sales tax, design-services contracts and business administration. | 14 questions → |
Professional Practice and EthicsCCIDC Code of Ethics, copyright and plagiarism, conflicts of interest, professional conduct, nonstructural/nonseismic submittals, allied professionals and research sources. | 12 questions → |
Design StandardsElements and principles of design, ergonomics and universal design, design phases, construction documents and bidding, contract administration and environmental topics. | 22 questions → |
AdministrationCode adoption, permits, inspections and appeals, essential service buildings, field changes, code definitions and structural components. | 12 questions → |
Occupancy ClassificationsUse and occupancy classification and separated vs nonseparated occupancies. | 6 questions → |
Types of ConstructionConstruction types, allowable heights and areas, and allowable materials by type. | 7 questions → |
Fire Protection RequirementsFlammability of materials, hazardous storage, fire-resistance design, flammability tests, flame-resistant finishes, flame spread, ceilings and sprinkler coordination, and fireplaces. | 15 questions → |
Interior FinishWall and ceiling finish classes by occupancy and location, trim and decorative materials. | 7 questions → |
Means of EgressEgress terminology, occupant load, exit location and sizing, exit signs and illumination, sprinklered vs nonsprinklered rules, and emergency escape openings. | 15 questions → |
AccessibilityCalifornia accessibility scoping and technical requirements, path of travel, unreasonable hardship, alterations, residential accessibility and ADA Titles I and III. | 18 questions → |
Building SystemsPlumbing fixtures and water conservation, mechanical, electrical and lighting requirements, energy code forms and mandatory measures, and when to engage consultants. | 14 questions → |
Miscellaneous Code ProvisionsNatural light and ventilation, glazing and safety glazing, sound transmission, and smoke and carbon monoxide alarms. | 8 questions → |
How to register for the IDEX California
Eligibility
Path 1 (sit now, certify later): 40 semester core units, or more than 5 but less than 8 years of diversified design experience. Path 2 (certified on passing): 80+ units plus 2 years, 60–79 units plus 3 years, 40–59 units plus 4 years, or 8 years of experience. Paths 3 and 4: proof of passing a national exam such as NCIDQ, ARE, NKBA or LEED AP. Every candidate must pass the IDEX California to be certified.
Retake policy
Candidates who do not pass pay a $400 re-testing fee before the registration deadline for the next exam window.
Score release
Beginning with the Fall 2026 window, results are given immediately when you submit the exam (previously 10–12 weeks).
Credential renewal
Certification as a Certified Interior Designer is renewable every two years.
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IDEX California FAQ
How many questions are on the IDEX California?
The IDEX California has 150 questions and you have 3 hours to finish. Question types: Multiple choice, one correct answer from four choices (a–d). Some questions include reference drawings or code tables shown on screen..
How long is the IDEX California exam?
Testing time for the IDEX California is 3 hours.
What is the passing score for the IDEX California?
IDEX California passing standard: Pass/fail. Each question is worth one point with no penalty for wrong answers; the passing score is set in advance by a modified Angoff standard-setting study, not a fixed percentage. Score range: Pass/fail.
How much does the IDEX California cost?
The IDEX California registration fee is $800 for Path 1 and Path 2 candidates, $700 for Path 3 and Path 4, due with the application and non-refundable. Retake $400; reschedule within a window $50; no-show $500. Check the official site for current fees before you register.
What is on the IDEX California?
The IDEX California covers Legal Requirements and Responsibilities, Professional Practice and Ethics, Design Standards, Administration, Occupancy Classifications, Types of Construction, Fire Protection Requirements, Interior Finish, Means of Egress, Accessibility, Building Systems, Miscellaneous Code Provisions.
Who administers the IDEX California?
The IDEX California Interior Design Exam is administered by CCIDC. Delivery: Secure internet-based computer testing through Meazure Learning/ProctorU, at test centers in California and other locations, or by live remote proctoring from home. Closed book: no code books are allowed, and calculators and watches are prohibited. Based on the most recently adopted California Building Code..
Can you retake the IDEX California?
Candidates who do not pass pay a $400 re-testing fee before the registration deadline for the next exam window.
Is there a free IDEX California practice test?
Yes. PrepBanq has 15 free IDEX California practice tests with 150 exam-style questions in the real IDEX California formats, and every answer is explained. No credit card is needed.
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