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Interior Decorating Classes

Career Diploma in
Interior Decorating

Make your good taste and sense of style work for you with Interior Decorating classes. Learn how to create color schemes, arrange furniture, choose fabrics and flooring and create beautiful rooms. Graduates will receive the online C.I.D. Certification Review Course and Entrance Exam. Upon passing the exam, membership credentials as a "Certified Interior Decorator" will be issued by Certified Interior Decorators International.

  • Prerequisite: None
  • Study Method: Online, with textbooks
  • Program Length: As few as 4 Months

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  What You'll Learn

Our Interior Decorating classes consist of 18 easy-to-follow lessons. Each comprehensive lesson introduces an essential skill, followed by in-depth instruction in how it applies in the real world. You’ll also complete challenging practice exercises that reinforce key concepts such as…

  • Creating the furniture plan
  • Working with suppliers
  • Supervising the completion of a project
  • The measuring and scale-drawing process
  • Drawing the floor plan

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View Interior Decorating Curriculum Details  

Lesson Group 1: Orientation: Ashworth College Career Program

Learning at Ashworth  

The goals and values of Ashworth College; time management; creating a realistic weekly and monthly study schedule; the nature and purpose of assessments; how to study effectively to prepare for and take an online examination; developing the skill sets necessary for success in the twenty-first century.

Concepts in Small Business and Self-Employment  

Evaluating your business idea; setting yourself apart from the competition; market testing; investment funding and donation funding; qualities of an entrepreneur; crowdfunding and angel investors.

Lesson Group 2: Interior Decorating Basics

A Day in the Life of an Interior Decorator  

Characteristics of an interior decorator; furniture showrooms and home studios; allied professionals; working with clients; client files and purchase orders.

Measuring a Room  

Measuring tools; wall terminology; the measuring and scale-drawing process; widths, depths, and heights; considering electricity and heating; drawing the floor plan.

Placing Furniture in a Plan  

Using an architect’s scale; placing furniture; using furniture templates; creating a presentation plan; measuring a floor plan and explaining its contents to clients.

“To the Trade Only”  

Businesses and markets available to the trade; vendor pricing methods; gaining access to resources; creating a resource library.

Lesson Group 3: Design Fundamentals

Understanding Interior Decorating and Design  

Roles and responsibilities of decorators and designers; relationships of allied professionals; history of the decorating profession; understanding the design process and scope of services.

The Value of Interior Decorating and Design  

Decorating and design theories from both a physical and psychological perspective; universal design; special populations; evidence-based design; environmental responsibility.

Elements and Principles of Design  

Structural versus decorative design; understanding space, line, shape, mass, texture, light, color, and pattern; applying scale, proportion, balance, rhythm, emphasis, and harmony; attributes of Egyptian, Greek, and Roman styles.


Color properties, dimensions, theories, and schemes; psychological and physiological effects; influence of color on design principles and elements; color in finishes, fabrics, and furnishings; using the standard color wheel.

Lesson Group 4: Building Systems and Space Planning

Construction Components, Systems, and Codes  

Construction processes and components; structural classifications and terms; major building codes and federal regulations; sustainable construction alternatives.

Lighting, Electrical, and Communications  

Lighting goals, regulations, and LEED opportunities; light quantity versus quality; natural and artificial light sources; lighting fixtures and luminaries; selecting lighting fixtures for function, aesthetics, and economics; identifying visual communication plans and symbols related to lighting, electrical, and communication systems.

Space Planning: Furnishings to Rooms  

Spatial relationships and furniture scale; furnishing sizes and clearance requirements; negative space requirements; determining square footage.

Space Planning: Rooms to Buildings  

Requirements of residential and commercial public and private zones; guidelines pertaining to design principles, traffic flow, and site orientation; sustainable solutions for space planning; organization systems related to alignment and manipulation; functional and economic benefits of residential and commercial floor plans.

Lesson Group 5: Materials, Furnishings, and Fabrics


Design characteristics of non-resilient, wood, and resilient flooring; carpet and rug design characteristics based on content and construction; sustainable flooring alternatives; handmade rug styles; characteristics of carpet padding; estimating carpet quantities; using floor coverings to solve a design problem.

Ceilings and Walls  

Ceiling construction; design characteristics of ceiling materials, wall materials, paint, and finishes; wall, baseboard, and ceiling molding; estimating wallcovering quantities.


Furniture and accessories available in today’s market; identifying quality craftsmanship in furniture construction; types of wood appropriate for furniture construction; construction techniques of upholstered furniture.


Natural and manufactured fibers; principal uses and characteristics of fibers; fabric construction and testing methods; dyeing and finishing methods; common fabrics used in residential interiors; solving decorating problems using textiles.

Window Treatments, Accessories, and Art  

Window treatment styles, hardware, and design requirements; various types of home accessories and art mediums; selecting and placing art and accessories.

Interior Decorating and Design as a Career  

Job opportunities in interior decorating; requirements for starting a decorating business; basic components of a letter of agreement; ethical standards for interior decorators; specialty areas and emerging opportunities in residential interior decorating.

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  What You Get

Unlike other online interior decorator courses, the Ashworth College course is 100% self-paced. Study on your terms when and where it fits your schedule. We’ve removed the obstacles so you can move ahead fast!

Carefully selected content ensures our online Interior Decorating classes include a balance of useful theory and practical application. Your tuition covers:

  • Beautifully illustrated interior decorating lesson book
  • Drawing supply kit
  • Online lessons and exams
  • Certified Interior Decorators InternationalOne-year membership in Certified Interior Decorators International ($295 value). Benefits include access to trade discounts, continuing education and more.
  • Online C.I.D. Certification Review Course and
    Entrance Exam ($215 value)
  • Certified Interior Decorator designation when passed

Graduates of our Interior Decorating classes receive a personalized diploma and may attend our annual graduation ceremony. Online interior decorator courses set the stage for success in a creative career where your flair for color, space and design can come alive for a fulfilling future.

  • Interior Decorating Classes Books


  • Interior Decorating Classes Diploma


  • Graduation Video


Design a new career. Start your Interior Decorating classes today. Speak with an Admissions Advisor at 1-800-957-5412 or enroll online now.