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I need a comprehensive design engineering plan for a 400-foot bedroom and bathroom addition to my home in San Lorenzo, California. The project requires: Architectural Design: - Creating detailed floor plans - Developing elevation drawings Structural Engineering: Assessing and ensuring the structural integrity of the addition. Interior Design: Designing the interior layout and aesthetics. Ideal skills and experience: - Proven experience in residential design and engineering - Strong portfolio with similar projects - Knowledge of California building codes and regulations - Good communication skills for collaboration Please provide a detailed proposal with your experience and approach.
Project ID: 40546307
29 proposals
Active 2 days ago
Location: San Lorenzo, United States
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29 freelancers are bidding on average $3,308 USD for this job

Hi, I have worked on similar residential addition projects where bedrooms, bathrooms, floor plans, elevations, interior layouts, and structural coordination had to be developed for permit review. I have also helped prepare California residential design packages with architectural drawings, structural coordination, code notes, and practical interior planning for bedroom and bathroom additions. I'd love to share my experiences with you. Best regards, Epa
$3,000 USD in 7 days
5.8
5.8

Hello, I can assist with the design engineering plan for your 400 sq ft bedroom and bathroom addition in San Lorenzo, California. I have experience with residential additions, including architectural design, structural coordination, and permit-ready documentation. I can develop detailed floor plans, elevations, and interior layouts while coordinating the structural design to ensure the addition meets California building code requirements. My approach: Review existing home conditions and available drawings Develop architectural plans and elevations Coordinate structural requirements for the addition Create a functional interior layout and design Prepare documents suitable for permit review I understand the importance of communication and coordination throughout the project and can work through revisions as needed. I would be happy to review your project details and discuss the next steps. Thank you.
$3,000 USD in 7 days
4.6
4.6

Hi there, I can provide a complete design package for your 400 sq ft home addition, including architectural floor plans, elevations, structural engineering, and interior layout, all tailored to California building codes. I work with California-licensed professionals to deliver permit-ready drawings and provide support throughout the review process to ensure a smooth approval. Best Regards
$3,000 USD in 5 days
3.4
3.4

Hello, As a seasoned Licensed Professional Civil Structural Engineer, I am confident that my skills and experience align seamlessly with your needs for your home addition project. I have an impressive 9-year record in residential building structural engineering design, working on and successfully completing numerous projects similar in complexity and scope to yours. A notable charm I bring to the table is my wide geographical licensure base, which includes your location - California. My strong command of Architectural Engineering, AutoCAD, and Building Design coupled with an expansive understanding of local codes and regulations makes me an ideal fit for your project. Your complete satisfaction with the work done is my utmost priority, thus I intend to adopt a highly collaborative approach throughout the project, ensuring that you are involved every step of the way. In addition to my technical abilities, my extensive knowledgebase allows me to troubleshoot any potential challenges that may arise during the project. With me on board, you can rest assured knowing you have a diligent professional committed to delivering meticulously-detailed and structurally-sound plans for your home addition. Please let's discuss further how we can get your dream home expansion off on a solid footing. Thanks!
$4,440 USD in 6 days
0.0
0.0

Hi I understand you need a complete design engineering plan for a 400 square foot bedroom and bathroom addition in San Lorenzo California including architectural drawings structural engineering and interior design with full compliance to California building codes and local permitting requirements. I have experience in residential additions and integrated architectural and structural design for California projects including detailed floor plans elevations structural analysis and permit ready documentation. I am a California licensed structural engineer and ensure all designs meet local seismic and building code requirements. Deliverables will include detailed floor plans elevation drawings structural engineering analysis interior layout design and a coordinated construction ready drawing set suitable for permit submission and execution. Thank you, James.
$4,000 USD in 7 days
0.0
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✅ Ready to jump in and get this done the right way—clean, fast, and reliable. ✅ Hi there, I’ve reviewed your project for a home addition design, and I understand you’re looking for someone who can develop practical, code-compliant plans that clearly integrate the new addition with your existing structure while keeping construction feasibility and budget in mind. I have experience working on residential additions and structural coordination projects where the key focus is making sure the new space blends properly with the existing home—both structurally and architecturally. I understand how important it is to balance design intent with real-world constraints like load paths, foundation tie-ins, and local building code requirements. You’ll receive clean, well-organized design drawings along with revisions if anything needs adjustment during the process. Looking forward to working with you on this.
$3,000 USD in 7 days
0.0
0.0

Hi how are you doing well? I can prepare a comprehensive design and engineering plan for your 400 sq ft bedroom and bathroom addition in San Lorenzo, California, including architectural floor plans, elevations, structural coordination, interior layout, and permit-focused documentation. I lead a strong residential architecture and engineering team with solid experience in home additions, California building code coordination, AutoCAD/BIM drafting, architectural design, structural review, interior planning, bathroom layouts, bedroom additions, and construction-ready drawing packages. My method will be organized and code-focused. First, I will review your existing house plans, site conditions, desired addition location, room requirements, foundation/framing conditions, utility connections, local zoning/setbacks, and any Alameda County or San Lorenzo permit requirements. Then I will develop the floor plan, elevations, interior layout, structural notes/calculations coordination, material notes, and a clear drawing set suitable for review and contractor pricing. For final permit submission, a California licensed architect/engineer should review and seal the drawings if required by the local authority. One important question before starting: do you already have an existing house plan or site survey showing property lines and the proposed addition location? I can communicate clearly and would be glad to become your long-term residential design and engineering partner.
$3,000 USD in 2 days
0.0
0.0

Hello, I have proven experience delivering comprehensive residential design and engineering packages for home additions in California, with a strong working knowledge of California Building Code, Title 24 energy compliance, and the specific permitting expectations of Alameda County jurisdictions like San Lorenzo. I will handle the full scope of your 400 sq ft bedroom and bathroom addition from end to end — producing detailed architectural floor plans and elevation drawings, conducting a thorough structural integrity assessment of the existing home and new addition, and developing an interior layout and aesthetic design that integrates seamlessly with your current living space. Every deliverable, from stamped structural drawings and permit-ready architectural sheets to interior finish selections and material specifications, will be packaged into a cohesive, code-compliant design engineering plan that moves smoothly through Alameda County permitting and gives your contractor everything needed to build with confidence I am ready to starrt. Best regards, James
$3,000 USD in 10 days
0.0
0.0

Hello, I can provide a complete design engineering package for your 400 sq ft bedroom and bathroom addition in San Lorenzo, California, including architectural floor plans, elevation drawings, structural coordination, and interior layout planning. My approach will begin with reviewing your existing house layout, site conditions, proposed addition location, foundation/framing conditions, utility constraints, setbacks, and local permitting requirements so the new space integrates properly with the existing home. I will then develop a clear, code-conscious drawing set that balances architectural function, structural integrity, constructability, and the desired interior feel for the bedroom and bathroom. The package can include floor plans, exterior elevations, structural notes/details, material notes, interior layout guidance, and revisions based on your feedback or plan-check comments. I have strong experience with residential additions, structural design coordination, AutoCAD/BIM drafting, and permit-oriented construction documentation. Please share any existing drawings, site survey, photos, and your preferred bedroom/bathroom layout goals, and I can start with a practical concept and move it toward a complete design package. Regards.
$3,000 USD in 7 days
0.0
0.0

Hello, I am proficient in residential architectural design, structural engineering, interior design, and permit-ready construction documentation, and have over 10 years of experience in this field. The most important part of this project is creating a well-integrated bedroom and bathroom addition that is structurally sound, visually consistent with the existing home, and fully compliant with California building codes. I will complete this project in the following steps to ensure its successful completion. * Review your existing home, project requirements, and site information, then prepare detailed architectural floor plans and exterior elevation drawings. * Perform the structural assessment and design the required framing and foundation to ensure the addition is safe, durable, and code-compliant. * Develop an efficient interior layout with practical design solutions and deliver a coordinated construction-ready drawing package after incorporating your feedback. I have previously worked on similar residential additions and remodeling projects, including architectural design, structural engineering, and permit documentation for California projects, so I believe I am well-suited for this project. I would like to chat with you to discuss the project further. Thank you.
$3,000 USD in 7 days
0.0
0.0

Hello, I can help you develop a clear and permit-ready design package for your 400 sq ft bedroom and bathroom addition in San Lorenzo. I have experience with residential additions, architectural drafting, structural coordination, and code-conscious construction documents, so I can make sure the new space ties properly into the existing home while remaining practical to build. My work would include reviewing the existing layout, site conditions, roof/framing connection, foundation needs, setbacks, utility locations, and California residential code requirements before preparing the floor plan, elevations, structural notes, and construction details. I will focus on creating a functional bedroom and bathroom layout with good circulation, natural light, clean exterior integration, and a design that supports the permitting process. I can also revise the drawings based on your feedback or plan-check comments to help move the project forward smoothly. Please share any existing drawings, site survey, photos, and your preferred layout ideas, and I can begin with a coordinated concept package. Regards.
$3,000 USD in 2 days
0.0
0.0

⭐⭐⭐Hello, how are you? I would be happy to assist with the design of your 400 sq ft bedroom and bathroom addition in San Lorenzo, California. I have experience delivering residential additions that combine thoughtful architectural planning, structural coordination, and functional interior design while meeting local building code requirements. My approach begins with reviewing your existing home and project goals, followed by developing detailed floor plans, exterior elevations, and a structurally sound addition that integrates seamlessly with the existing residence. I will also prepare an efficient interior layout that maximizes comfort, functionality, and aesthetics while coordinating all design elements for a permit-ready package. Please note that any required architectural or engineering stamps must be provided by professionals licensed in California. I look forward to reviewing your existing plans and discussing your vision for the project. Best regards,
$3,000 USD in 3 days
0.0
0.0

Hi, I’m James, a licensed architect and engineer based in California. I saw your post for a 400 sqft bedroom and bathroom addition in San Lorenzo, CA, and would be happy to assist. You’re looking to expand your home by adding a new bedroom and bathroom to create more comfortable and functional living space. I'll provide a complete design solution covering architectural layout, structural engineering, and interior design from concept through permit-ready submission. • Detailed existing and proposed floor plans • Exterior elevation drawings • Structural framing and foundation support design • Interior layout and space planning design • Support for plan check revisions if required To get started, please share any existing drawings, site survey information, and your ideas or preferences for the new bedroom and bathroom layout. I’ll take full responsibility for your project from start to finish and work closely with you. Best regards, James
$3,000 USD in 7 days
0.0
0.0

Hi, Thank you for sharing your project. I understand you’re looking for a comprehensive design and engineering solution for a 400-square-foot bedroom and bathroom addition to your home in San Lorenzo, California. I’m confident I can deliver exactly what you need—seamlessly integrating architectural design, structural engineering, and interior planning while ensuring adherence to all California building codes. With over 10 years of experience in residential architectural and engineering projects, I have completed similar home additions in the Bay Area. For example, I recently led the design and engineering for a 500-square-foot master suite expansion in Oakland, handling everything from initial concept through construction documents and city approvals. My familiarity with local regulations and attention to client collaboration ensures a smooth process from start to finish. Here’s how I can support your project: - Detailed architectural floor plans and elevation drawings tailored to your vision and property. - Structural engineering assessment and calculations to guarantee safety and compliance. - Custom interior design layouts and finishes for a cohesive, comfortable space. - Building permit-ready documentation, including BIM models and coordination with local requirements. I am confident that my approach and experience make me an excellent fit for your addition. I look forward to collaborating closely with you to bring your project to life. Best Regards, David
$3,000 USD in 4 days
0.0
0.0

Hello, I have 15+ years of experience in residential architectural and engineering projects, and as a licensed architect, I’m well-equipped to handle all aspects of your home addition in San Lorenzo, CA. I understand you’re seeking a comprehensive design and engineering plan for a 400 sq. ft. bedroom and bathroom addition, including floor plans, elevation drawings, and interior layout, while ensuring compliance with California building codes. > I will create detailed architectural floor plans and elevations tailored to your needs. > I’ll provide structural assessments and drawings to guarantee the addition’s integrity and safety. > I’ll design an inviting, functional interior layout and offer expert guidance on finishes and aesthetics. > I’ll ensure all plans comply with San Lorenzo and California regulations, making permitting smooth. I’ve recently completed a similar bedroom and bathroom addition in the Bay Area, successfully navigating local codes and delivering a seamless design. Could you please share any inspiration images or preferred styles for the new addition? Please contact me. Best Regards, Ronald
$3,000 USD in 10 days
0.0
0.0

Hello, I'd be excited to help design your 400 sq ft bedroom and bathroom addition. My experience includes residential additions where architectural planning, structural coordination, and interior functionality all need to work together seamlessly. I'll develop detailed floor plans, elevations, and a practical interior layout while ensuring the addition integrates naturally with your existing home. Structural considerations and California code compliance will be incorporated from the beginning to help streamline permitting and construction. I believe successful home additions should feel like they were always part of the original house, and that's the standard I strive for. I'd be happy to review your existing home plans and discuss the best approach for your project. Best Regards Richard
$3,000 USD in 3 days
0.0
0.0

Hi, Your project is exactly the type of residential design work I enjoy. Adding a new bedroom and bathroom isn't just about increasing square footage—it's about improving the way you live in your home. Here's what I can provide: • Detailed architectural floor plans • Exterior elevations • Structural design coordination • Functional interior layout • California code-conscious design • Revision support throughout the project I work closely with homeowners to ensure every design decision reflects both their vision and practical construction requirements. Once I review your existing plans and site information, I'll outline the most efficient path from concept to permit-ready drawings. I'd love the opportunity to work together. Thanks James
$3,000 USD in 5 days
0.0
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Greetings, A home addition should look intentional rather than added on, and that's exactly the philosophy I bring to residential design. Your bedroom and bathroom expansion presents an opportunity to enhance both the appearance and functionality of your property while maintaining architectural continuity. My approach begins with understanding the existing structure before developing a coordinated design package that includes architectural layouts, exterior elevations, structural integration, and thoughtfully planned interior spaces. Throughout the process, I carefully consider circulation, natural lighting, privacy, structural feasibility, and California building requirements to create a design that is both attractive and practical. Communication is a priority for me, and I enjoy collaborating with clients as ideas evolve. I would be pleased to review your current home, discuss your goals, and provide examples of similar residential addition projects. Thanks Robert
$4,000 USD in 7 days
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? Hello ? Thank you for the opportunity to support your 400 sq. ft. bedroom and bathroom addition in San Lorenzo, California. We understand you need a complete design package including architectural design, structural engineering, and interior planning, fully compliant with California building codes. I lead a high-performing civil engineering team composed of talented young professionals with world-class expertise across architecture, structural engineering, MEP (Mechanical, Electrical, and Plumbing), and design. Backed by global experience and government certification, we deliver coordinated, practical, code-compliant solutions. Guided by our motto, "More beautiful and More youthful!", we also prioritize green building practices, integrating energy-efficient and sustainable design solutions. Scope of Services: ◆ Architectural floor plans and space optimization ◆ Exterior elevations integrated with existing home ◆ Structural engineering with California seismic compliance ◆ Interior design layout (finishes, lighting, materials) ◆ Coordination of architectural, structural, and MEP systems ◆ Permit-ready drawings per CBC and local regulations We focus on delivering a design that is functional, visually refined, structurally sound, and fully approvable for permitting. We are ready to begin upon your approval. Sincerely
$4,000 USD in 7 days
0.0
0.0

Hello, I can help with the full design and engineering package for your bedroom and bathroom addition in San Lorenzo, California. I have experience in residential additions, including architectural layout development, structural coordination, and permit-ready construction documents. I’m familiar with California residential code requirements and the typical review process for additions of this size. My approach: Review your existing home plans and site conditions Develop architectural floor plans and elevations for the addition Coordinate structural design for framing, foundation, and load paths Refine interior layout for functionality and code compliance Prepare a coordinated set suitable for permit submission Deliverables: Architectural drawings (floor plans, elevations) Structural engineering coordination and details Interior layout planning Permit-ready drawing set in PDF (and CAD if required) I would be happy to review your existing conditions and discuss timeline and next steps. Thank you.
$3,000 USD in 7 days
0.0
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