We provide custom interior design solutions including: Space planning, CAD drawings for building and design implementation, project managment, architectural detailing and material specifications, custom furniture, window treatments and lighting, redesign with existing furniture, home organization, custom painting and murals, art, lighting, antiques and accessories.

Highlights, Specialties & Features

  • Approchable Innovative Design

Professional Associations & Certifications

  • ASID
  • CCIDC

Serviced Areas

  • San Francisco Bay Area, Costra Costa County, Alameda County, Marin County

Payment Options

  • Money Orders, PayPal, Personal Checks, Debit Cards, MasterCard, VISA

Contact Details

  Person Thomas Design Group
  City Martinez , CA

Business Representative

Thomas Design Group

Thomas Design Group serves clients in all aspects of interior design, from the design and transformation of a newly constructed home into a comfortable and functional environment to the renovation of an individual room. We are as accustomed to working with architects, engineers, contractors and landscapers as we are to helping individual clients make the right choices for furnishings, window treatments, lighting, fabric and paint/ finishes. Our commitment and passion is to make each project a unique expression of our client's individual tastes and preferences.

Michelle R. Thomas, Principal designer brings over 16 years of professional interior design experience to the firm. After graduating with her degree in Interior Design and becoming a member of ASID she worked throughout the country gaining knowledge and expertise in all aspects of Residential and Commercial design.

Promotions & Discounts

Call us today for a 15% discount on design services or purchases with an approved design agreement until December 1st.

  • I would recommend this business
  • Creative design, organized, attention to detail
  • None

Working with Michelle at Thomas Design Group has been an amazing experience. She has helped me with numerous projects and my guest bath remodel completed last year turned out great. From start to finish she drafted, designed, managed and completed my remodel in the agreed time frame which was very important to me because I had out of town guests coming to visit.

Her sense of space and color was perfect and her attention to detail was much appreciated. Having never worked with a Interior Designer before I really didn't know what to expect but she listed to all of my likes dislikes and concerns making me feel comfortable with the process.

I am working with her again to refresh and update my Family and Dining room decor and then it's on to remodeling the Kitchen. Needless to say I would highly recommend Michelle and Thomas Design Group for all of your design and decorating needs.

Value for moneyExcellent Value
Service & supportExcellent customer service and easy to work with
QualityUnsurpassed
LocationClose to my home
Overall ratingExcellent

Customer Testimonials

I have worked with Michelle or over ten years and found her to be a very talented designer. Having witnessed her interact with many clients over the years they always seem very happy with her attention to detail, creativity and positive personality. I would highly recommend her for any size interior or exterior design project.


Working with Michelle at Thomas Design Group has been an amazing experience. She has helped me with numerous projects and my guest bath remodel completed last year turned out great. From start to finish she drafted, designed, managed and completed my remodel in the agreed time frame which was very important to me because I had out of town guests coming to visit.

Her sense of space and color was perfect and her attention to detail was much appreciated. Having never worked with a Interior Designer before I really didn't know what to expect but she listed to all of my likes dislikes and concerns making me feel comfortable with the process.

I am working with her again to refresh and update my Family and Dining room decor and then it's on to remodeling the Kitchen. Needless to say I would highly recommend Michelle and Thomas Design Group for all of your design and decorating needs!


Michelle was wonderful to work with. She was very creative and really brought all of the aspects of the remodeling of our bathroom into a awesome design. I wouldn't think to hire anyone else but Michelle on my next remodeling project.