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    featured on forbes
    best of houzz service award 2020
    best of houzz service award 2021
    Winner ARDA Awards
    Design & Engineering Firm

    About Golden State

    Welcome to Golden State Design & Engineering (GSDE), we are a full-service design & engineering firm based in Sacramento, California providing services for the residential & commercial sector throughout California.


    Our mission is to deliver comprehensive and exceptional design and engineering services tailored to the commercial & residential sector. Through a collaborative and client-centered approach, we strive to exceed expectations, providing cost-effective, sustainable, and aesthetically pleasing solutions. We are committed to continuous learning, innovation, and enhancing the well-being of communities we serve.

    • Over 10 years of collected experience
    • 100+ successfully executed projects
    • Exceptional work quality
    What We Do

    Our Services

    How We Work

    Our Process

    "Unlocking your vision begins with understanding your unique needs and aspirations. Through a collaborative and iterative design process, we transform ideas into inspiring spaces tailored just for you."

    Project On-boarding
    Design Programming
    Schematic Design
    Design Development
    Construction Documentation
    Permitting & Bidding
    Project Close-Out
    Construction Administration
    Unique Firm

    Why Choose Us?

    • Full-Service Design

      You no longer have to worry about locating and coordinating collaboration between multiple firms to complete the requirement for your project.

    • Maintain Schedule & Transparency

      Adhering to timelines ensures that milestones are met in a timely manner and preventing delays.

    • Fixed Project Cost

      A fixed project cost is a predetermined financial estimate established at the outset of a project, ensuring clarity and stability in budgeting.

    • Innovative Design

      Innovative design transcends the boundaries of convention, paving the way for groundbreaking solutions.

    • Client Centered Approach

      We allocate lots of meeting time for our client’s project so we can take the time need to understand our client needs and objectives.

    • Value Engineering

      Make the most out of your budget with our exceptional programming approach to reduce construction cost and meet clients budget.








    Project Types We Do!

    New Construction
    Custom Home(s)
    (Accessory Dwelling Unit(s))
    Residential Multi-Family
    Commercial Sector(s)

    Office(s), Hotel(s), Retail, Mixed Use, Industrial Spaces, Parking Facilities

    Street Improvements

    Subdividing, Lot Mergers & Lot Line Adjustments, SB9 Urban Lot Split(s)

    State & Federal Government
    Latest News

    Our Blog

    What Client Says

    Customer Reviews

    VlaDi P.
    VlaDi P.
    Very detail oriented group of guys designing and engineering homes. Had my addition and an ADU as well as my customers projects engineered by Golden State Design & Engineering, great experience.
    Semir Avdic
    Semir Avdic
    Golden state design did the design and engineering for my custom home. From the start William and his team were beyond helpful. The plans were well thought out and easy to read. Throughout the project any questions I had, William made himself available to answer very promptly. In addition to this, Golden State took on several other projects for us, and the results were just as great. William prepared all of the paperwork, filed with the county and did any revisions the county needed. I am beyond happy with their service and would recommend them to anyone. I will be doing an ADU in the near future and I can’t wait to see what golden state design can help us come up with.
    Angel Raya Soto
    Angel Raya Soto
    Golden State Design and Engineering did a great job with the design and with the permit process for my ADU, I highly recommend this firm, very knowledgeable!
    Ilia Gotisan
    Ilia Gotisan
    It was an absolute great pleasure working with Golden State Design & Engineering on our custom home. Even though we were working in different states, their professionalism, quick responsiveness, and attention to every detail exceeded my expectations. William and his team took their quality time and effort to bring all of our dream home expectations into reality. Their envision is highly unique and impressive. Thank you to the Golden State Design & Engineering team for your service.
    Nicholas Beliy
    Nicholas Beliy
    Recently had the pleasure of working with Golden State on a restoration project, and I must say, they surpassed all my expectations. We hired them to handle the design, drafting, engineering, and permit acquisition, and their expertise and professionalism were truly outstanding. From the moment we brought Golden State on board, it was clear that we had made the right choice. Their team, led by William, displayed an impressive level of knowledge and skill throughout the entire project. Their attention to detail and commitment to excellence were evident in every aspect of their work. They took the time to understand the unique requirements of the restoration project and delivered a design that perfectly balanced modern functionality with the preservation of historical elements. Their ability to capture the vision of the project and translate it into a comprehensive plan set was truly impressive. They paid meticulous attention to every detail, ensuring that all specifications were accurately represented in the drawings. As well as addressing the structural challenges. One of the greatest advantages of working with Golden State was their ability to handle the often time-consuming and frustrating process of obtaining permits. They took charge of the permit acquisition process, liaising with the necessary authorities and ensuring that all documentation was submitted promptly and accurately. This saved us a significant amount of time and allowed us to focus on other aspects of the project. Throughout the project, William and Yasir were reliable and responsive points of contact. They maintained open lines of communication, keeping us informed of progress, addressing any concerns promptly, and providing valuable guidance and expert advice when needed. Their professionalism and dedication to client satisfaction were truly commendable. Thank you, Golden State Design and Engineering Firm, for your exceptional services!
    Jing Zhou
    Jing Zhou
    I hired William to design my ADU for me! They are very responsive and efficient! After we got the permit from the county, they are still willing to follow up if I need to make some changes to the permitted plans. And when my contractors have questions about the plans, they are willing to spend the time to discuss with my contractors. I really appreciate their help!!!
    stepan gorodnyy
    stepan gorodnyy
    I had the most incredible experience working with William and his team at (Golden State Design & Engineering), on our custom home. From their responsiveness and professional approach to their design and engineering skills, every aspect of the process exceeded my expectations. Their team's understanding and kindness made the collaboration smooth and enjoyable. There informative guidance and attention to detail truly set them apart, and I most definitely would recommend their services to anyone in need of residential design and engineering expertise.
    Alek Davis
    Alek Davis
    William built an ADU in my backyard. He handled everything from planning and getting permits to construction (only the original home plan was my idea). Some jobs (foundation, roof, HVAC, electrical, stucco, etc.) were done by subcontractors, but William was closely monitoring the work during all phases and his team did a lot of hands on jobs (site preparation, framing, insulation, interior, cabinets, painting, etc.) as well. In a few instances, William came up with the solutions that saved me thousands (he figured out how to set up electrical without having to add a new panel, chose the optimal option for solar, etc.). I'm very happy with the end result and would not hesitate to recommend William and his company for any type of construction or remodeling jobs.
    Elite Auto Imports Inc.
    Elite Auto Imports Inc.
    William was easy to work with. He knows his trade well. Till next project guys! Thanks again.

    Project Gallery

    • 541310 Architectural Services &
    • 541330 Engineering Services
    DUNS NO:
    • 119132267
    • 8712 Architectural Services &
    • 8711 Engineering Services
    Cage #
    • 9R4L5
    • 81101500, 81101502, 81101505, 81101508, 81101526, 81101533, 81101522