Principal Builders, Inc.

Tenant Improvement General Contractor headquartered in San Francisco. We specialize in high-end comm Corporate Interior Specialists

Principal Builders Inc.

is a customer-focused, team-oriented, collaborative general contracting company specializing in corporate interiors for the Fortune 1000. Founded in 2003 by a group with a vision to change the construction industry and a combined 150 years of experience, Principal Builders is a Bay Area general contractor specializing in tenant improvements. With offices in San Francisco and San Jose, our Fortune

Photos from Principal Builders, Inc.'s post 05/17/2024

Still pinching ourselves! A big thank you to the for this honor and to our amazing partners for their seamless collaboration. Head over to our bio to read the full article!

Client: Greylock Partners
Architect:
Photographer: Eric Laignel

Photos from Principal Builders, Inc.'s post 04/19/2024

Reflecting on this year’s IIDA Honor Awards, we were thrilled when four of our projects were selected as finalists. It was an honor collaborating with creative minds on these endeavors, and we’re immensely proud of the final results!


Client: Greylock Partners
Architect:
Photographer: Eric Laignel


Client: Confidential Client
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Client: Norwest Venture Partners
Architect:
Photographer: Eric Laignel


Client: Confidential Client
Architect:
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Photos from Principal Builders, Inc.'s post 03/29/2024

Crafting spaces to let minds ignite.
We love how Argonaut’s new office turned out!

Client: Argonaut
Architect:
Photographer:

Photos from Principal Builders, Inc.'s post 02/02/2024

Closing the week on a stylish note with finishing touches that make a bold impact.

Client: Emergence Capital
Architect:
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Client: Confidential Client
Architect:
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Client: Norwest Venture Partners
Architect:
Photographer: Eric Laignel

Photos from Principal Builders, Inc.'s post 01/19/2024

Craving a cozy corner to work from with this weather! ☕️Where’s your dream workspace?


Client: Confidential Client
Architect: .sky
Photographer:

Client: Emergence Capital
Architect:
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Client: Argonaut
Architect:
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Photos from Principal Builders, Inc.'s post 01/05/2024

Happy New Year! We are excited for all the upcoming projects that this year will bring. Here is a look back at some of our favorites in 2023.


Client: Norwest Venture Partners
Architect:
Photographer: Eric Laignel

Client: Argonaut
Architect:
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Client: Emergence Capital
Architect:
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Client: Confidential Client
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Client: Confidential Client
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Client: Confidential Client
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Client: Farella Braun + Martel
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Photos from Principal Builders, Inc.'s post 01/05/2024

Happy New Year! We are excited for all the upcoming projects that this year will bring. Here is a look back at some of our favorites in 2023.


Client: Norwest Venture Partners
Architect:
Photographer: Eric Laignel


Client: Argonaut
Architect:
Photographer:


Client: Emergence Capital
Architect:
Photographer:


Client: Confidential Client
Architect:
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Client: Confidential Client
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Client: Confidential Client
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Client: Farella Braun + Martel
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Photos from Principal Builders, Inc.'s post 12/13/2023

While we love seeing our clients settle into their new space, saying goodbye is never easy. Thank you to our incredible client and project team for making this journey memorable.


Photos from Principal Builders, Inc.'s post 12/01/2023

Imagining a Friday happy hour at one of these beautiful offices! If you had to pick, which spot would you choose?



Client: Confidential Client
Architect:
Photographer:



Client: Argonaut
Architect:
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Client: Emergence Capital
Architect:
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Client: 8VC
Architect:
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11/17/2023

When you see your project at night and it’s so beautiful that it stops you in your tracks.



Client: Baker Pacific Group
Architect:
Living Wall Contractor: horticulture



Photos from Principal Builders, Inc.'s post 11/02/2023

Wallpaper: The perfect pop of character that can transform any space!



Client: Confidential
Architect:
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Client: 8VC
Architect:
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Client: Asana
Architect:
Photographer:


Photos from Principal Builders, Inc.'s post 10/19/2023

Keep finding ourselves coming back to this one. Kudos to the project team.



Client: Confidential
Architect:
Photographer:


10/13/2023

Thank you for joining in our landmark 20th anniversary celebration!

As we reflect on the past 20 years, we are filled with gratitude for our clients, team members, trade partners, and friends who have played an indispensable role in our growth and success. Thank you for joining us on this journey!


Photos from Principal Builders, Inc.'s post 10/02/2023

Exciting News Alert! 📢 Our project has made it on the longlist for the Awards in the Workplace Interiors Category! Sharing this fantastic achievement with our amazing project partners, & !



Photographer: .giammarco

Photos from Principal Builders, Inc.'s post 08/23/2023

Highly recommend embracing your inner tourist! 🚌🌉 Huge shoutout to the team for joining us on this fun adventure!


Photos from Principal Builders, Inc.'s post 08/09/2023

Shoutout to for the invite to level up our golf game! We had a blast while mastering some fresh new skills. 🏌🏻‍♀️⛳️

Photos from Principal Builders, Inc.'s post 07/31/2023

It’s days like today when we wish we had a rooftop space to work from! 🌞



Client: Confidential Client
Architect:
Photographer:

Mission Bell Mfg, Inc. on LinkedIn: #jasonorearphotography 06/29/2023

https://www.linkedin.com/feed/update/urn:li:activity:7034561866387341312?utm_source=share&utm_medium=member_desktop

Mission Bell Mfg, Inc. on LinkedIn: #jasonorearphotography The sleek black steel in this electric vehicle showroom contrasts beautifully with the wood slats that line both stories in this project completed last year in…

Principal Builders Inc. on LinkedIn: Bay Area Research Company by SkB Architects 06/29/2023

https://www.linkedin.com/posts/principal-builders_bay-area-research-company-by-skb-architects-activity-7080313048732733440-n6sE?utm_source=share&utm_medium=member_desktop

Principal Builders Inc. on LinkedIn: Bay Area Research Company by SkB Architects Another big win for our team! We are thrilled to have received both Architizer's jury vote and the popular vote. Celebrating this win with our partners, Raise…

Photos from Principal Builders, Inc.'s post 06/05/2023

Appreciation post for exposed brick and beams.

Their natural beauty and rich tones add a unique focal point, emphasizing the architectural integrity of a building while creating a cozy and inviting atmosphere.



Client: 8VC
Architect:
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Client: Emergence Capital
Architect:
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Client: Confidential Client
Architect:



Client: Norwest Venture Capital
Architect:
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Client: Gusto
Architect:
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Photos from Principal Builders, Inc.'s post 05/01/2023

We are thrilled to announce the opening of our new home, designed and built by our skilled team. Our new space provides a welcoming and functional environment for our clients and employees. We can’t wait to have you all stop by for a visit!

Photos from Principal Builders, Inc.'s post 03/03/2023

Friday fun with the Team! We love getting the chance to tour each others projects in different phases so we can share lessons learned and our different approaches. Bonus is the Team lunch at the end of it!


03/02/2023

Thank you for hosting a fun evening at ! •

Photos from Principal Builders, Inc.'s post 02/16/2023

Asana’s office checks all the boxes!
Functional and colorful design ☑️
Collaboration spaces ☑️
Coffee bar ☑️
Full kitchen ☑️



Client: Asana
Architect:
Photographer:

Photos from Principal Builders, Inc.'s post 01/30/2023

Meet Kenji! When he isn’t managing projects, you can find him traveling to new spots within US or around the world! •

Photos from Principal Builders, Inc.'s post 01/24/2023

Staircases that you’ll want to climb.



Client: Gusto
Architect:
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Client: Nixon Peabody
Architect:
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Client: Confidential Client
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Client: Dropbox
Architect: &
Photographer: .ansidei


Photos from Principal Builders, Inc.'s post 01/24/2023

Staircases that you’ll want to climb.



Client: Gusto
Architect:
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Client: Nixon Peabody
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Client: Confidential Client
Architect:
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Client: Dropbox
Architect: &
Photographer: .ansidei


Photos from Principal Builders, Inc.'s post 12/30/2022

Taking a moment to look back on a few of favorite projects in 2022. Which one is your favorite!?



Client: Confidential
Architect:
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Client: Asana
Architect:
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Client: Latham & Watkins
Architect:
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Client: WestBridge Capital
Architect:
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Client: Confidential
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Client: Dropbox
Architect:
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We are honored to be recognized as one of the Bay Area’s Best Places to Work! Many aspects contribute to building a grea...
We're pretty excited for winning #1 Best Small Company to Work for in the Bay Area for the second year in a row!!! ❤☝🏆
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Happy Friday, everyone!!

Telephone

Address


320 Ritch Street
San Francisco, CA
94107

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

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