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Committed to Excellence

Are you looking for a professional and friendly interior designer in Danville, CA? Whether you need a full-scale remodel or a room update, we can provide these services and much more.

Diablo Design Group

Principle Designers

Jan Galletly * Kelly Addington * Sandy Dudum-Bennet * Rachelle Cuny


Time to Relax

Elegant and Modern

Chic And Sophisticated



Interior Design Done Right

  • Space Planning and Layout

  • CAD Drawings

  • Drafting and Rendering

Space Planning


Residential / Commercial

  • Area Rugs

  • Lighting

  • Accessories

  • Flooring

  • Window Coverings

  • Kitchen and Bath Remodels

  • Custom Furniture

  • Art

  • Color Consults

  • Fabric

  • Custom Pillows


We work for residential and commercial clients who wish to update the look and feel of their living or working space. We start a consultation which enables us to capture your vision while providing ideas of our own. Through this collaboration, we will finalize a beautiful design plan.


I worked with DDG on my new construction home in Alamo. The entire process was so stress free. I was able to select beautiful furniture. Rugs, window coverings, and accessories for my new home. I especially loved that I was able to work within my budget. Shelly selected items that ranged in price and I was able to decide where I wanted to spend. They items in my home are unique and things you don’t see in every other house in the area. You will not be disappointed!

- Jill P.

6 amazing interior designers in one building to serve the customers, what more could you want! Diablo Design Group is a new interior design group that came together here in downtown Danville to serve the area. They really are great at what they do so if you are looking for a quality interior design firm look no further!

- Derek G.

Jan's expertise, knowledge, and willingness to share all of her trades with us has been wonderful.  She is an outstanding dedicated professional who takes the time to understand her clients' needs and then delivers above and beyond what is expected.  We could not have done this move without Jan's help, and I highly recommend her for your job.

- Rich S.

“DDG is fantastic and so is the staff. Glad to finally have a design studio that stands above the rest!”

Viviana M.



Jan Galletly

Principle Designer

Rachelle Cuny Head Shot.jpeg

Rachelle Cuny

Principle Designer


Sandy Dudum Bennett

Principle Designer

Meet the Team


154 E Prospect Ave, Danville, CA 94526, USA

(925) 309-4828

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Thanks for submitting!


Kelly Addington

Principle Designer

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