What Is a Certified Interior Designer (CID)?

• Certification established through a Title Act under California Business and Professions Code Sections 5800–5812 enacted in 1990.
• Certified Interior Designer and CID are the only legally protected titles for interior designers in California.
• Certification is administered by the California Council for Interior Design Certification (CCIDC).
• California law recognizes Certified Interior Designers as design professionals.

California Law Recognizes CIDs as Design Professionals

California Civil Code Section 8014 expressly includes Certified Interior Designers within the legal definition of a “design professional,” alongside licensed architects, landscape architects, professional engineers, and land surveyors.

This legal recognition:

• Establishes CIDs as qualified participants within California’s design and construction industry.
• Affirms the professional standing of CIDs who meet established education, experience, examination, and ethical standards.
• Strengthens the recognition of CIDs by consumers, building officials, contractors, and other design professionals.
• Provides CIDs with applicable rights under California law, including design professional lien rights when all statutory requirements are met.

Certified Interior Designers Are Qualified To:

• Prepare, stamp, and submit nonstructural, nonseismic interior construction documents to local building departments within their legally permitted scope.
• Demonstrate competency in California building codes, space planning, accessibility, means of egress, and life-safety requirements.
• Apply their education, experience, and examination-based qualifications to protect the health, safety, and welfare of the public.

Design Your Future: Become a Certified Interior Designer!
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Earning the title of Certified Interior Designer (CID) provides more than professional credibility. It demonstrates verified qualifications, provides legal recognition in California, and distinguishes CIDs within the design and construction industry.

• Legally Recognized Title
  • Certified Interior Designer and CID are the only titles for interior designers formally recognized under California law.
• Recognized as a Design Professional
  • California Civil Code Section 8014 includes CIDs within the legal definition of a design professional, alongside licensed architects, landscape architects, professional engineers, and land surveyors. This important recognition affirms the professional standing of CIDs within California’s design and construction industry.
• Design Professional Lien Rights
  • As recognized design professionals, CIDs may qualify for design professional lien rights when all applicable statutory requirements are met.
• Proven Qualifications
  • Certification requires a qualifying combination of interior design education and diversified experience, followed by passage of the IDEX® California Examination.
• California Code Knowledge
  • CIDs demonstrate knowledge of California building codes, accessibility, means of egress, fire and life safety, professional responsibilities, and other requirements applicable to interior design practice.
• Ethical and Professional Accountability
  • CIDs must agree to follow the CCIDC Code of Ethics and Conduct and comply with California requirements governing professional practice.
• Professional Recognition
  • Certification helps clients, employers, building officials, contractors, and other design professionals identify interior designers who have met established education, experience, examination, and ethical standards.
• Commitment to Public Protection
  • CIDs demonstrate the competency necessary to protect and enhance the health, safety, and welfare of the public.

Recognition as a design professional does not expand or change the legally defined scope of practice of a Certified Interior Designer or any other design profession.

Options to Qualify

Candidates must have a minimum of six years of combined interior design education and diversified interior design experience to apply for certification. Candidates qualifying through work experience alone must have at least eight years of diversified interior design experience.

Candidates using a combination of education and experience must complete at least 40 semester core units or 60 quarter core units, which is equivalent to approximately two years of interior design education.

Option	Interior Design Education	Required Diversified Interior Design Experience
A	80+ semester core units or 120+ quarter core units	2 years
B	60–79 semester core units or 90–119 quarter core units	3 years
C	40–59 semester core units or 60–89 quarter core units	4 years
D	No qualifying interior design education	8 years

Core units include qualifying coursework in interior design and related subject areas. General education courses are not included when calculating core units.

After satisfying the applicable education and experience requirements, candidates must pass the IDEX® California Examination to become certified.

IDEX® California Examination: What It Is

The IDEX® California Examination evaluates a candidate’s knowledge in three primary areas:

• California Codes and Regulations
• Business Practices and Ethics
• Design Standards

Topics include:

• Occupancy classifications
• Construction types
• Fire protection
• Means of egress
• Accessibility
• Building systems
• California legal requirements
• Professional responsibilities
• Ethics and administration
• Interior finishes and design standards

Why It Is Required

The IDEX® California Examination verifies that candidates understand the laws, codes, professional responsibilities, and design standards applicable to interior design practice in California.

It is the only interior design examination that specifically tests California codes and regulations.

Eligibility to Take the IDEX® California Examination

Applicants may qualify to take the examination through education or diversified interior design experience, including:

• Education Path: Completion of at least two years in an interior design certificate or degree program, or at least 40 semester core units or 60 quarter core units in qualifying interior design coursework.
• Experience Path: At least five years of diversified interior design experience, equivalent to approximately 9,000 hours.

Eligibility to take the examination does not, by itself, satisfy all requirements for certification. Applicants must complete the applicable education and experience pathway before becoming a Certified Interior Designer.

Who May Use “Certified Interior Designer” or “CID”?

Only individuals certified by CCIDC who maintain their certification in good standing may legally use the title Certified Interior Designer or the appellation CID in California.

Individuals who have not been certified by CCIDC may not represent themselves as Certified Interior Designers or use the CID appellation. Unauthorized use violates the California Certified Interior Designer Title Act.

Learn More

Visit www.ccidc.org for:

• Certification qualification requirements
• Application instructions
• IDEX® California Examination information
• The official IDEX® Study Guide
• IDEX® preparation resources

To be eligible for certification, all candidates must meet one of the following minimum qualification pathways:

• At least six years of combined qualifying interior design education and diversified interior design experience, or
• A minimum of eight years of qualifying interior design education only or diversified interior design experience only.

How Education and Experience Are Calculated

Interior design education is evaluated by the number of qualifying core semester units completed, not by the number of calendar years spent earning a degree. General education courses are not included.

The amount of diversified interior design experience required is based on the candidate’s total qualifying core units:

• 40–59 core semester units: 4 years of diversified interior design experience
• 60–79 core semester units: 3 years of diversified interior design experience
• 80 or more core semester units: 2 years of diversified interior design experience

Quarter units are converted to semester units for evaluation.

Diversified interior design experience is calculated based on full-time qualifying work of at least 36 hours per week. One year of full-time experience equals at least 1,872 hours.

Eligibility is determined by the candidate’s qualifying core units and documented diversified interior design experience.

There are Four Pathways to prove Qualification, Candidates must meet one of the following criteria (RIDQC Exam Candidates, please apply under Path 1 or 2):

Q: What is Certification?
A: Certification in California is a Title Act.

• The Certified Interior Designer Title Act is written into law.
• California Business and Professions Code 5800 – 5812
• Certification is not a license or registration (Practice Act).
• There is not Licensing or Registration for interior Designers in California.
• The Certified Interior Designer’s Title Act is the only thing recognized by the state.

Q: Who Can Apply for Certification?
A: Qualified Professionals From one of the Following:

• Interior Design
• Architecture
• Building Design

Q: What is an Accredited School or Educational Institution?
A: Requirements must come from an accredited institution approved by US Department of Education; CIDA or FIDER accreditation NOT required.

Q: What is the Definition of Core Units?
A: Total Combined Coursework Units in the Following Categories (Excluding General Education Courses):

Interior Design, Building Design, Interior Decoration, Drafting History Design Architectural History
Architecture, Graphic Design, Construction Documents, Art History Building Codes Green Building Practices
Computer Aided Design and Drafting (CADD), Business Practices as Related to the Practice of Design

Q: How are Core Units Calculated?
A: Core units are calculated by semester units. Quarter units will be converted into semester units.

Q: I don’t have a degree, will I qualify?
A: Total Core units determine eligibility, completion of a degree not required.

Q: How Much Education do I need?
A: Meet Minimum Qualifications to Take the IDEX California®

• Minimum of 40 Semester/60 Quarter Core Units from accredited design program
• Education requirements to complete certification vary.
• Option for experience-only candidates to apply is available, details to follow.

Q: What is the Definition of Diversified Design Experience?
A: Design Experience Including:

• Prepare complex nonstructural or non-seismic plans
• Instruction for the preparation of complex nonstructural or non-seismic plans
  • Complex nonstructural or non-seismic plans:
    • Require the skills of a licensed contractor to implement
    • Includes programming, planning, designing, and documenting construction
    • Installation of nonstructural or non-seismic elements, finishes and furnishings
    • Protect and enhance the health, safety, and welfare of the public.

Q: How is Diversified Design Experience Calculated?
A: Based on Full time work 36 hours or more per week, 52 weeks per year.

• Full-Time Diversified Design Experience Requirements:
  • 1 Year = 1,872 Hours+
  • 2 Years = 3,744 Hours+
  • 3 Years = 5,616 Hours+
  • 4 Years = 7,488 Hours+
  • 5 Years = 9,360 Hours+
  • 8 Years = 14,976 Hours+

Q: How is Proof of Diversified Design Experience Submitted?
A: Submit Proof of Diversified Design Experience in Two Ways:

1. IF YOU ARE SELF-EMPLOYED – Complete the Employment Verification Form and include Tax Returns that claims yourself as an Interior Designer in the occupation section going back the amount of years you are claiming experience for or letter from a CPA or Attorney. OR
2. IF YOU ARE NOT SELF-EMPLOYED – Fill out the Employment Verification Form must be signed by Candidate and Employer.
3. Completed and signed Employment Verification Forms cand be emailed to the Certification Coordinator.

• Proof for Self-Employment:
  • Complete the Employment Verification Form (Must be signed by CPA or Attorney).
  • Federal Tax Returns 1040/1040A/1040EZ (Page 2 Only)
  • Return for each year of experience
  • Letter from a CPA or Attorney confirming candidate’s profession, verifies knowledge required duration of occupation.
  • Résumés NOT accepted for self-employment
• Proof for Outside Employment:
  • Complete the Employment Verification Form (Must be signed by Employer/Supervisor or HR Manager).
    • Signature of Employer/Supervisor Required
    • Include a Separate Form for all Experience/Positions for Consideration

Q: Can International Candidates Apply?
A: All Candidates who Meet the Qualifications are Encouraged to Become Certified:

• International education allowed, provided:
  • International Education from Accredited Source
  • Accreditation by USDE International Equivalent accrediting agency
  • Provide translated/verified transcripts
  • International experience considered
  • Provide verifiable proof of diversified design experience

Q: How do I Know if I Meet the Qualifications?
A: You Must Qualify Under One of the Following Three Paths to Qualification:

Path 1 Candidates
Meet the minimum Qualifications to sit for the IDEX California® Exam, do not qualify to complete certification after passing the IDEX. CCIDC will keep application and test results on file until Candidate provides proof of completion of remaining qualifications to certify.

Candidates must meet one of the following minimum qualifications:

1. Minimum of 40 Semester Core Units from accredited design program (60 Quarter Units) – OR –
2. More than 5 but less than 8 years of diversified design experience.

Path 2 Candidates
Qualify to Become Certified Upon Passing the IDEX California®.

Candidates must meet one of the following minimum qualifications:

1. 80+ Semester Core Units from accredited design program (120+ Quarter Units)
   1. Plus two years of diversified design experience
2. 60 – 79 Semester Core Units from accredited design program (90+ Quarter Units)
   1. Plus three years of diversified design experience.
3. 40 – 59 Semester Core Units from accredited design program (60+ Quarter Units)
   1. Plus four years of diversified design experience.
4. Minimum eight years eight years of diversified design experience, interior design, or combination of both, which total eight years.

Path 3 Candidates
Streamlined path to take the IDEX California® for Candidates who have previously passed a national design exam and become certified.

Candidates provide proof of passing one of the following examinations, to qualify:
ARE | CASP | LEED-AP (+) | NCBDC | NCIDQ | NKBA-CKBD (+) | RIDQC Exam Candidates, please apply under Path 1 or 2

Path 4 Candidates
Streamlined path to take the IDEX California® for Candidates who would like to become certified with a commercial designation.

Candidates must meet all of the following minimum qualifications and provide proof of passing one of the following examinations.
ARE | CASP | LEED-AP (+) | NCBDC | NCIDQ | NKBA-CKBD (+) | RIDQC Exam Candidates, please apply under Path 1 or 2

Candidates must provide proof of passing these California Based International Codes Council (ICC) Courses
• Building 101: Building Department Overview
• California Building Code Essentials
• CBC/CFC Means of Egress
• California Building Code Title 24 Regulations
• CBC Chapter 11B: Accessibility in Public Buildings, Public Accommodations, Commercial Buildings

ALL Candidates MUST pass the IDEX California® to qualify for Certification in California

Q: How do I Apply?
A: Qualified Candidates apply online:

• Complete and submit the online application
• Email requested documents to the CCIDC Certification Coordinator
• Mail in corresponding documentation as instructed
• Pay Fees: Application/IDEX/Test Center
• All fees are due at the time of application.
• Corresponding documentation MUST be received prior to the registration deadline.
  • Registration Deadline for the Spring IDEX® California Examination is March 1st
  • Registration Deadline for the Fall IDEX® California Examination is August 1st
  • Incomplete applications deferred to future testing period, NO Exceptions.
• Candidates have 1 year from registration approval to sit for exam.
• Candidates retaking the IDEX®, must pay retest fees prior to respective registration deadline

Q: When is the IDEX California® Testing?
A: There are two testing periods per year:

• Spring: May 1 – 31st
• Fall: October 1 – 31st

Q: What Happens After I Submit my Application Packet?
A: The verification process takes time; CCIDC will contact you via email:

• Log in to see status updates on your application.
• Information provided verified by CCIDC Staff (duration varies).
• Notification of application approval provided, upon completion.
• Candidates have 1 year from registration approval to sit for exam.
• NOTICE TO SCHEDULE (NTS) email from Castle Worldwide Testing Center.
• Candidates receive the NTS email at the end of March (Spring)/August (Fall).
• NTS provides candidates testing center account login.
• Candidates log in to select the date, time and location/or online proctoring option for exam.
• Live Remote Proctoring (LRP) option available.
• Many testing centers throughout California, the US, even Worldwide.
• Study materials and courses found on CCIDC website.

Q: Are there study materials for the IDEX® California?
A: CCIDC Provides a Free Study Guide

• Booklet Includes:
  • Exam information, schedule, rules, exam format, content, sample questions and FAQ.
  • Information regarding study materials and classes, provided by third-party vendors.

Q: When will I know my test results?
A: For accuracy and fairness, a Matriculation expert reviews/qualifies each exam.

• Exams scheduled all 31 days, tests not verifiable until last exam submitted.
• Test results provided 3-5 weeks after last day of test month.
• Email sent with Pass/Fail status when results made available.
• Letter with specific scores sent USPS.
• IDEX Certificate mailed to passing candidates.
• Retakes scheduled as soon as next testing period.
  • Notice to retake and retest fee due: March 1st Spring IDEX or August 1st Fall IDEX.

Q: When I pass the IDEX® California, am I a Certified Interior Designer?
A: No, Passing the IDEX® California does NOT mean candidates are automatically Certified!

• Path 1 Candidates file held until Candidate provides proof of completion of qualifications.
• All other Candidates must complete the certification process and be given their CID number/stamp.

Q: What is the next step after passing the IDEX® California?
A: The Compliance Committee reviews and verifies information collected by CCIDC.

• Congratulations letter sent upon approval and prompt to pay the Bi-Annual Certification Fees.
• Candidates have 1 year from letter date to complete certification.

Q: When am I a Certified Interior Designer?
A: Candidates are Certified once the following have been completed.

• Bi-Annual Certification fees received
• Certification Number assigned.
  • Upon completion, New CIDs will be mailed:
    • CID Interior Designer Information Binder
    • CID Certificate
    • Verification Letter with CID#
    • CID ID-Card
    • Rubber or Digital Stamp (Only if Ordered – approximately 8 – 12 weeks later)***

Q: What does it cost?
A: There are generally two types of fees.

• Total Fees due with application (Includes Application Fee + IDEX Exam Fee + Testing Center Fee)*:
  • Path 1 & Path 2: $800 Total*
  • Path 3 & Path 4: $700 Total*
• Total Bi-Annual Certification Fees*
  • Due After Passing Exam and Compliance Approval:
  • ALL Candidates $300 – $400***

* Fee is nonrefundable
***Dependent on Option Selected

Before applying for certification as a Certified Interior Designer (CID) in California, please ensure you meet the minimum qualifications for education and experience. Only qualified candidates will be considered for certification.

What You’ll Need to Apply

To complete your certification application, please prepare the following:

• Completed Online Application
• Signed Code of Ethics
• Proof of Education
• Proof of Diversified Interior Design Experience
• Photocopy of Driver’s License or Government-Issued ID
• Payment (via credit card or check payable to CCIDC) for:
• • One-time, non-refundable application and processing fee
  • IDEX California® exam fee
  • Testing center fee

Note: All fees must be submitted at the time of application. Incomplete applications will not be processed.

Examination Requirement

Before certification can be conferred, all candidates must pass the IDEX® California exam.