Semmes & Co. Builders, Inc., located on the Central Coast of California since 1978, constructs unique and creatively styled, environmentally-friendly custom homes and remodels.  We are a leader in building science technology and the county’s green building pioneer. In addition to a diverse portfolio, Semmes & Co. has built a reputation for quality standards, reliability, and technical expertise.  Our clients are assured of a healthy, energy efficient home that’s a joyful living experience.


Signup For Our Newsletter


Watch Educational VideosLinkedInFacebookRemodeling and Home Design

Remodeling and Home Design Remodeling and Home Design

"Quality work, super nice people, they offered good ideas and they had the knowledge to help with site management projects (eg. solar, water, road, gate, etc.), above and beyond general remodel construction work."

P & M Nichter, Harmony, CA

"Each member of the Semmes & Company team brings with them a positive energy and a passion which makes them all a genuine pleasure to work with."

Jim Duffy, Architect , Jim Duffy Architecture

"Semmes & Co Builders did an excellent job. We are very happy!"

A & S Everett, Templeton, CA

“One of the main reasons for the success of Semmes & Co. is respect, for the customer, the architect, the workers, even the subcontractor. It all adds up to a good working relationship, something I am proud to be a part of.”

Michael G. Petersen , Margarita Electric

"We love our new addition!"

D Chafin, Atascadero, CA

"...if you are interested in building a project that is complicated, highly detailed and unconventional there really exists no other choice on the central coast for a contractor than Semmes & Co. Builders."

Ben Korman , d2b Design

"My interest in Semmes and Co is the true honesty, integrity, and team work displayed on a day to day basis."

Scott Beavers , Harvey Plumbing
Semmes & Co Builders has new custom-home clients looking for the perfect property. If you or someone you know, has land in San Luis Obispo, Southern Monterey, or Northern Santa Barbara Counties - we would love to hear from you. Please contact Jessica Steely •