Trusted Design + Build Experts in Napa & Sonoma Valleys
JS Design + Build, we simplify remodels and additions by bringing every part of your project under one roof — from initial design drafts to the final construction walkthrough.
We are full-service design + build firm based in Napa serving St. Helena, Calistoga as well as our neighbors in Sonoma, through Solano and Green Valley. We specialize in managing every detail of your home renovation or new build with a streamlined, stress-free process. Our in-house team of designers, builders, and project managers ensures seamless communication, consistent quality, and projects delivered on time and on budget.
Whether you’re creating your dream home, adding more space, or undertaking a major remodel, we provide the expertise and accountability you need for a successful result.
Why Choose Us For Design Build Projects in Napa Valley?
Accountability
Our team takes ownership of the project from day one of the design process to the final construction clean up. No excuses, no finger pointing - just accountability.
Expertise
Designing for over 45 years and building for over 20, we have always maintained focus on a high level of craftsmanship. Having solid experience in-house allows us to recognize and solve potential issues before they start.
Integrity
Earning our good reputation did not come easily. We take your trust seriously and do the right thing when no one is looking.
Our Design + Build Process
Let's get acquainted. Are we a fit?
Aligning your scope of work with your budget.
Phone interview to discuss your project. Is a design and build firm the right choice for you and your needs?
Meet on site to further discuss your project and start honing in on a specific scope of work. Have you established an investment amount for your home?
Meet at our office present and discuss a rough budget range based on similar, recent projects. If agreeable, we will present our hourly Design and Budget Contract and send for e-signatures.
Phase 1
Let's get designing!
Design development and budget feasibility.
The design team will come to your home to document existing conditions and measure your home to begin the drawings. We work with you until the floor plan is exactly right.
Together we review and compare against out initial rough budget.
Based on the accepted floor plan, and any new knowledge from due diligence, together we compare against our initial rough budget. We pay attention and respect your budget!
Phase 2
Dial in the details!
Finalize the design. All selections complete.
We present detailed elevations of all cabinetry and tile walls. We work with you to select all finish materials to hone in the design specifics for your new dream home!
Winding up design and budgeting.
With most specifications made, it's time for one final look at the numbers. To do this we have a walk-through with our full team, including our trusted trade partners. We present that budget to you for any final adjustments for the Home Improvement Contract.
Phase 3
Construction begins!
Professionally produce the project as designed and per contract.
Relax, we got this! Due to all the selections and design decisions made during the robust Design and Budget Contract, the smooth transition to a fixed fee Home Improvement Contract quickly becomes apparent. Our project management software and assigned project manager, keeps you in the loop and up to date on progress.
Phase 4
Design + Build FAQs
Why choose Design + Build?
Our design-build approach streamlines your remodeling project by combining expert design and skilled construction under one roof. With a single point of contact, we ensure seamless communication, cost efficiency, and faster project completion—delivering high-quality results that match your vision and budget. Experience a stress-free remodel with a team that brings your dream space to life, from concept to completion.
Do you work on smaller projects?
We focus on large-scale projects such as whole-home renovations, additions, and ADUs. Smaller projects are typically part of a larger remodel.
Do you handle both design and construction?
Yes — our in-house team manages both design and build for a cohesive, streamlined experience. Some design-build companies outsource design. We believe in-house design-build is better.
Will you help with permits?
Absolutely. We manage all permitting and code compliance for Napa, Sonoma, and other counties as well as the respective city jurisdictions.
Why Hire a Design-Build Firm Over a General Contractor?
While a general contractor focuses solely on the construction phase, a like JS Design + Build manages your project from the very first idea through the final walkthrough — all under one roof. This integrated approach delivers better communication, fewer delays, and more accurate budgeting.
Why choose our Design + Build approach over hiring an architect for remodels?
It makes sense to hire our Napa Design + Build team over an architect when you’re looking for:
- Full-Service Design – We create high-quality construction plans that meet permit requirements include material selections (a step usually handled by an interior designer).
- Budget Accuracy – Designs are created with real construction costs in mind, so your estimate reflects the actual build. There are also budget checkpoints within the design phase.
- Streamlined Process – No passing your project between separate architect, designer, and contractor teams, nor the lead times usually associated with that back and forth.
- Best for Larger Projects– We’re ideal for whole-home renovations, ADUs, and multi-space remodels, but not single-room projects.
Think of it this way – all General Contractors need a design to provide an accurate quote. Coming to us first means your design is tailored to your vision andyour budget, saving time, money, and stress.
What Are The Key Advantages of Design + Build vs General Contractor Only Projects?
- Single Point of Contact – One team is responsible for design, permitting, and construction.
- Accurate Estimates from the Start – Costs are based on real construction data, not separate “ballpark” guesses from multiple parties.Estimates without plans are simply inaccurate.
- Fewer Delays – No waiting for an architect to hand off plans or for a GC to interpret them.
- Better Design Alignment – Your plans are created with your vision, budget, and build feasibility in mind from day one.
- Coordinated Selections – We handle both construction plans and the material/finish selections, ensuring the final result matches the design intent.
With design-build, you get a smoother process, higher quality control, and the confidence that your project is designed to be built — not just drawn.