ADU & Junior ADU Construction

Whether creating a sanctuary for family or an independent guest retreat, we design & build ADU's that offer the perfect balance of luxury, privacy, & architectural continuity.

Refined Independent Living

An ADU should be a seamless reflection of your primary residence, offering the same level of luxury and comfort in a more focused footprint. We approach these projects with a "small-scale, high-impact" mindset, ensuring every square foot is optimized for light, flow, and functionality. Whether it is a detached guest house or a Junior ADU within your home’s existing walls, we coordinate the design and construction to feel like a natural, intentional part of your estate.

Architectural Harmony

We ensure your ADU complements the main house perfectly, using matching materials and design motifs to create a unified property aesthetic.

Turnkey Management

From navigating complex local zoning laws and permits to final utility hookups, we handle every technical detail for a stress-free experience.

Why Trust Bay Craft with Your ADU

Building an independent living unit requires a balance of privacy and design continuity. We approach every ADU with architectural rigor, ensuring the structure enhances your property. Our team manages the nuances of local regulations while protecting your family’s privacy during construction.

Our Work Process

Step 1

Discovery & understanding family needs

Step 2

Design & budget alignment

Step 3

Planning, permits & details

Step 4

Construction with dedicated oversight

Step 5

Final walkthrough & long-term care

Refined Spaces

Designed for life.

The Heritage Remodel

The Mid-Century Addition

Hillside Family Sanctuary

The Peninsula Restoration

Monte Sereno, CA

Before
After

Our Commitment

We stand behind every beam, finish, and structural detail we place on your property. Our work is rooted in the belief that luxury is only as good as the reliability that supports it.

We treat your property with the highest level of respect, focusing on structural excellence and long-term durability. By prioritizing premium materials and precise craftsmanship, we ensure that your ADU is not just a temporary fix, but a permanent investment in your family’s comfort and future.

Our responsibility extends beyond the final walkthrough as a dedicated partner in your home’s care. By managing every phase, our design-build team offers a level of accountability and ongoing support that ensures your new space remains seamless and structurally sound for years to come.

Transforming your property starts with a conversation. We invite you to schedule a private consultation to explore the possibilities.

Common Inquiries

What is the difference between an ADU and a Junior ADU?

An ADU is a detached or attached accessory dwelling up to 1,200 square feet with its own kitchen and bathroom. A Junior ADU (JADU) is smaller, created within the walls of your existing home (like a garage or spare wing), and can share a bathroom with the main house while having its own kitchenette and entrance.

In most cases, yes. Local zoning laws have become more flexible, allowing ADUs even on smaller lots as long as specific setback requirements are met. During our initial feasibility study, we analyze your property’s dimensions to design a unit that maximizes your available space without making your yard feel crowded.

They can, but it is not always required. You can choose to have separate meters for a completely independent setup—ideal for long-term guests—or you can tie the unit’s utilities into your main home’s existing systems. We handle all the plumbing and electrical engineering to ensure both structures have consistent, reliable power and water.

An ADU is a significant investment that typically increases your property’s market value by adding functional square footage and potential rental versatility. While it may lead to a modest reassessment of your property taxes based on the value of the new construction, it does not trigger a full reassessment of your entire home’s original value.

Privacy is a cornerstone of our design process. We strategically place windows, entrances, and outdoor living areas to prevent direct lines of sight between the two dwellings. We also use professional landscaping and sound-dampening materials to ensure both spaces feel private, quiet, and entirely independent.

Absolutely. ADU regulations can be complex and vary significantly by neighborhood. As a design-build firm, we take full responsibility for the entire permitting process, ensuring your unit is fully compliant with local height restrictions, fire safety codes, and structural mandates before construction ever begins.

Testimonials

Honest reflections from the families who have trusted us with their homes.

“Bay Craft transformed our kitchen while we lived in the home. The respect they showed for our daily routine was just as impressive as the final craftsmanship.”

The Miller Family

Homeowner

“The design-build approach saved us from many headaches. Having one point of contact for the architecture and construction made the process feel effortless.”

Sarah

Homeowner

“I have never worked with a team so dedicated to the small things. They treated our renovation with the same care they would their own family home.”

The Henderson Family

Homeowner

“The budget stayed on track and the communication was constant. It is rare to find a professional team that delivers exactly what they promise with such grace.”

Elena

Homeowner

“They took our vague ideas and turned them into a stunning reality. Our home finally feels like a reflection of how we actually live and grow as a family.”

The Thompson Family

Homeowner

“From the first consultation to the final walkthrough, the process was calm. We truly felt like our home was in the best possible hands from start to finish.”

Jessica Lee

Homeowner