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Studio

A Million Decisions Simplified

Landmark Interior Design Co. is a full-service interior design studio in Treasure Valley, Idaho, with our home base business located in San Luis Obispo County, California. Our residential projects range from remodels and renovations to custom homes. We also specialize in boutique-style commercial spaces. Our studio assists with all aspects of a project from start to finish, including collaborating with architects and builders, selecting all architectural details and finishes, and expertly decorating in a style that is all your own.

From initial concept to completion, we use our professional point of view, knowledge of local resources, and understanding of your individual taste to give each project its own unique “wow factor”.

With every project, we strive to create spaces that inspire: spaces that you never want to leave.

Remodel + Renovation
Custom Homes
Boutique Commercial Spaces

We redesign a space to change the appearance, structure or function while increasing the value and aesthetic of the overall structure or space.

From the starting line of the home-building journey, we carry you through the entire process of designing and building your dream home from the ground up.

A well thought out commercial space not only provides the perfect balance between function and aesthetics, but it will also maximize profits.

Remodel + Renovation
Custom Homes

We redesign a space to change the appearance, structure or function while increasing the value and aesthetic of the overall structure or space.

From the starting line of the home-building journey, we carry you through the entire process of designing and building your dream home from the ground up.

Remodel + Renovation

We redesign a space to change the appearance, structure or function while increasing the value and aesthetic of the overall structure or space.

Custom Homes

From the starting line of the home-building journey, we carry you through the entire process of designing and building your dream home from the ground up.

Boutique Commercial Spaces

A well thought out commercial space not only provides the perfect balance between function and aesthetics, but it will also maximize profits.

Designer

Marci Adargo

As the lead designer at Landmark Interior Design Co., Marci’s goal is for every project to become a genuinely loved space that is authentic and meaningful to her clients. With over 20 years of experience, she is known for her laid-back style, thinking outside the box, and finding inspiration everywhere. Marci craves a design challenge, and no matter what style she is asked to create, each space expertly reflects her client’s personal tastes and tells their unique story.

Marci loves her work, and she enjoys her downtime too. When she isn’t designing or daydreaming about projects, she can be found soaking up the sun with friends and family or rolling up her sleeves to embrace her inner child with her boys.

Marci Adargo

As the lead designer at Landmark Interior Design Co., Marci’s goal is for every project to become a genuinely loved space that is authentic and meaningful to her clients. With over 20 years of experience, she is known for her laid-back style, thinking outside the box, and finding inspiration everywhere. Marci craves a design challenge, and no matter what style she is asked to create, each space expertly reflects her client’s personal tastes and tells their unique story.

Marci loves her work, and she enjoys her downtime too. When she isn’t designing or daydreaming about projects, she can be found soaking up the sun with friends and family or rolling up her sleeves to embrace her inner child with her boys.

Projects

A sampling of our current projects with a story yet to be told..

Remodel + Addition

Arroyo Grande

Kitchen Remodel

Orcutt

Custom Home

CayucOs

ADU Addition

Atascadero

kind words from our people
Artistic and gifted professional. Marci was able to turn my outdated kitchen into a beautiful reality.

~ San Luis Obispo

Professional, approachable and definitely worth the investment.

~ Arroyo Grande

She’s amazing! I just love her!

~ Nipomo

Marci is like a drug I couldn’t live without while decorating and remodeling my home.

~ Arroyo Grande

I couldn’t have asked for a more amazing experience.

~ Arroyo Grande

I would recommend her in a second.

~ Shell Beach

She has a great eye for design and details.

~ San Luis Obispo

Our home is now our favorite place to be.

~ Shell Beach

We’ve remodeled homes before but have never enjoyed the process as much as we did with Marci.

~ Cayucus

Marci's energy and passion for her work are incredible.

~ San Luis Obispo

We will always be grateful for all that Marci's done with our home. Working with her made all the difference.

~ Arroyo Grande