ADUs & Garage Conversion
What Are ADUs?
Accessory dwelling units (ADUs) are additional, self-contained structures. They typically are a single room structure, designed either to function as a full living space or for another purpose. Maybe you want to increase your passive income, or you need a new office suite. The flexibility of ADUs allows you to craft a space entirely suited to your goals.
- Recreational use (e.g., yoga studio, entertainment space)
- Home office or art studio
- In-laws suite or guest house
- Rentable multi-use living space
What Is a Garage Conversion?
- Fully functional living space
- Additional bedroom
- Home office
- Playroom
- Redesigned recreational space
ADU & Garage Conversion Design & Build
- Color scheme
- Flooring
- Materials
- Layout
- Budget
- Timeframe
Evaluation & Consultation
We start with an on-site visit and evaluation. We need to see the space we will work with so we can begin visualizing your project. The consultation process is deeply involved, allowing us to grasp your vision and then distill it into functional designs. We go over elements like budget, deadlines, and any other details.
Design & Planning
Ordering Materials
Build Phase
Final Handover
With the project finished, the keys are yours. We do a walk-through of the project, highlighting key elements along the way. Our goal is 100% client satisfaction, so we are prepared to make adjustments as needed if any element steps out of line with your vision.
ADU & Garage Conversion FAQs
ADU and garage conversion timelines will vary by project. For a garage conversion, the process can take as little as 3 to 5 months, while ADUs typically take 6+ months. Timelines largely depend on several key variables, including:
- Project type (attached ADU, detached ADU, or garage conversion)
- Permitting and city approvals (we manage this entire process)
- Site conditions (grading, access, utilities, and existing structure condition)
- Design complexity and customization
- Lead times for windows, doors, cabinetry, and specialty finishes
Sharon’s experience with Silicon Valley jurisdictions means any scheduling and expectations are clear and accurate from the outset.
Yes, most of our clients can (and do) remain in their primary residence during construction. ADUs and garage conversions are typically separate from the main living space, so day-to-day disruption is often manageable.
However, some realistic factors at play include:
- Construction noise during working hours
- Temporary driveway or yard access limitations
- Occasional (brief) utility shutoffs, which we always schedule in advance
We provide a clear construction schedule so you know when higher-impact phases will start up. Usually, these include steps like laying foundation work or setting up utilities.
Costs are as varied as the projects themselves, with final prices depending on details like size, scope, and site conditions. Sharon provides clear, no-commitment estimates based on the consultation and the outline of your project details. Though costs vary, general starting ranges often include:
- Garage Conversions: Starting at $150,000–$220,000+
Detached ADUs: Starting at $275,000–$400,000+
Permitting is a major part of ADU projects, and drafting plans requires local knowledge to align with regulations. That’s where we come in. We handle the entire permitting process, using our local expertise to avoid delays in obtaining approvals.
Energy performance is especially significant in smaller living spaces like ADUs or garage conversions. During the consultation phase, Sharon can recommend features that reduce long-term utility costs, such as:
- High-performance insulation and air sealing
- Energy-efficient windows
- Heat pump HVAC systems
- Tankless or heat pump water heaters
- LED lighting throughout
- Energy-efficient appliances
Our design approach always aims to meet or exceed California energy standards without compromising on comfort and livability.
As a local, family-owned business, long-term relationships are the foundation of our success. Even after project completion, Sharon and her team remain available to
- Address any punch-list items
- Assist with manufacturer warranty questions (e.g., for appliances, fixtures, and materials)
Provide guidance on maintenance for finishes and systems
Sharon Stone Design brings a unique fusion of care and expertise to every project. We ensure every client receives a boutique, bespoke experience for each ADU or garage conversion project. Contact us today to take the first steps toward realizing your home improvement vision.