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 the highest quality standards, reliability, and technical expertise.  Our clients can be assured of a healthy, energy efficient home which is a joy to live in.

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“Our dreams surround us, wrapped with a beautiful earth clay ribbon. All this comfort and ambiance we owe to the Semmes & Co. people.”

Mike, 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

"...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

"Semmes & Company took what could have been a nightmarish experience for my husband and myself and turned it into a wonderful part of our lives that we will always be grateful for."

Marla, Paso Robles, 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

"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

"... borrowing from the old lawyer joke, Semmes & Co. better be careful - they may give contractors a good reputation! Seriously, we could not have been happier with our project and recommend Turko and his staff to anyone."

Jim & Elaine, San Luis Obispo, CA

Client Homes for Sale

Insulated Concrete Forms, Atascadero, CA
Southwest Territorial, Atascadero, CA
Semmes & Co also has several 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 at