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Timeline Expectations: How Long Does It Take to Build an ADU with Hall Builders Inc.?

Writer: Hall Builders Inc.Hall Builders Inc.

Considering an Accessory Dwelling Unit (ADU) to enhance your property or create additional rental income? Understanding the timeline involved is an essential first step. At Hall Builders Inc., transparency, craftsmanship, and personalized service define every project. Led by a dedicated husband-and-wife duo and their experienced crew, you can expect exceptional quality without compromising efficiency.

kitchen view with white cabinets and black countertops.

Let’s break down what your ADU building process typically involves:

Step 1: Detailed Planning & Design (Typically 4-8 Weeks)

Your ADU journey begins with comprehensive planning and design. You'll collaborate closely with our experts to capture your vision, preferences, and practical requirements, translating these into precise designs and detailed plans. This initial stage includes site visits, consultations, blueprint creation, and strategic preparation, typically spanning four to eight weeks based on project complexity.


Step 2: Permitting & San Luis Obispo County Regulations (Typically 4-8 Weeks)

With finalized designs, your project moves into the permitting phase. ADU regulations in San Luis Obispo County, informed by California's evolving ADU laws, vary based on location and scope. Our specialists navigate these regulations efficiently, ensuring streamlined approvals and full compliance. For detailed insights into current ADU laws and financing, review our previous blog: Navigating California's 2025 ADU Laws. Permit approval typically ranges from four to eight weeks.


Step 3: Construction Phase (Typically 3-5 Months)

The construction phase brings your ADU to life! With a focus on quality craftsmanship and clear communication, our experienced crew diligently builds your unit within an average timeline of three to five months. Project specifics such as site conditions, design complexity, and seasonal factors can affect this timeframe, but consistent updates keep you informed every step of the way.



Project Highlight: Hope Street ADU

A shining example of smart design and thoughtful planning, the Hope Street ADU showcases open, spacious living. This four-bedroom, two-bath unit features an expansive living area seamlessly integrated with a versatile and compact kitchen. The beautifully updated bathroom combines style and function, while practical storage solutions optimize the entryway, creating an ideal living space for potential renters or guests.


ADU floor plans

Final Inspection & Move-In Ready

Before handing over the keys, our founders personally oversee a thorough final inspection, ensuring everything aligns with high-quality standards and your personal expectations. Your completed ADU will be fully move-in ready, thoughtfully designed for immediate comfort and practical use.


Overall Timeline

From initial consultation to move-in readiness, the entire ADU process typically takes approximately seven to ten months. Timelines can vary based on your project's details, but clear communication and transparency ensure you remain informed throughout.

Ready to embark on your ADU journey?

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Contact us today, and discover how efficiently your project can become a reality!



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