ADU Construction in Simi Valley & Ventura County
Safeway Construction is your full-service ADU builder in Simi Valley and Ventura County. We design, permit, and build accessory dwelling units that add living space, rental income, and long-term value to your property. From detached guest houses to garage conversions, our team manages every step of the process so you don't have to.
Licensed ADU Builders in Ventura County
Safeway Construction specializes in building accessory dwelling units throughout Simi Valley and Ventura County. Whether you want a standalone guest house in your backyard, a unit attached to your existing home, or a full garage conversion, we have the expertise to deliver a high-quality ADU that meets your goals and your budget. Our design-build approach means you work with one team from the initial concept through move-in day.
California's ADU regulations have evolved significantly in recent years, making it easier than ever for homeowners to add secondary units to their properties. However, navigating the permitting process still requires in-depth knowledge of state laws, local zoning codes, and building requirements. Our team stays current on every regulation so we can guide you through the process with confidence and handle all permitting on your behalf.
With over 20 years of experience in residential construction and a 5.0-star rating on Google with 17 reviews, Safeway Construction has earned the trust of homeowners across Ventura County. We bring that same commitment to quality, transparency, and customer satisfaction to every ADU project we take on. From foundation work to finish carpentry, every detail is handled by our experienced team.
Types of ADUs We Build
Detached ADUs
A standalone structure built separately from your main home, perfect for a guest house, rental unit, or multigenerational living space. Detached ADUs can be built up to 1,200 square feet and offer complete privacy for occupants.
Attached ADUs
An addition connected directly to your existing home, sharing at least one wall. Attached ADUs are an efficient way to add living space without building an entirely separate structure. They integrate seamlessly with your home's existing architecture and utilities.
Garage Conversions
Transform your existing garage into a fully functional living space. Garage conversions are one of the most cost-effective ADU options because the basic structure is already in place. We handle structural upgrades, insulation, plumbing, electrical, and finishing.
Junior ADUs
Built within the existing footprint of your home, junior ADUs are capped at 500 square feet and must include a separate entrance and a small cooking facility. They are an affordable way to create an independent living space without expanding your home's footprint.
Why Choose Safeway for Your ADU
Full Permit Management
We handle every aspect of the ADU permitting process, from preparing architectural plans and engineering documents to filing applications and coordinating inspections. You never have to set foot in a planning office or chase down approvals.
Local Code Expertise
ADU regulations vary by city and county, and they change frequently. Our team maintains up-to-date knowledge of Simi Valley and Ventura County building codes, zoning requirements, and California state ADU laws so your project stays fully compliant.
Design-Build Under One Roof
From initial design concepts and 3D renderings to construction and final walkthrough, everything is managed by one team. This eliminates miscommunication between designers and builders, keeps your project on budget, and streamlines the entire timeline.
On-Time Completion
We provide a detailed project schedule before construction begins and hold ourselves accountable to that timeline. Our local presence in Simi Valley means no wasted travel time and faster response to any issues that arise during the build process.
ADU Construction Cost Ranges
ADU costs depend on the type, size, finishes, and site conditions. Here are typical price ranges for ADU projects in the Simi Valley and Ventura County area. Get a personalized estimate in 2 minutes at SafewayQuickQuote.com.
Garage Conversion
$80,000 - $150,000
Attached ADU
$150,000 - $250,000
Detached ADU
$200,000 - $350,000+
ADU Regulations in Simi Valley
Understanding local ADU regulations is essential before starting your project. Here are some key rules that apply to ADU construction in Simi Valley and Ventura County.
Maximum Size
ADUs in Simi Valley can be between 800 and 1,200 square feet depending on lot size. Junior ADUs are capped at 500 square feet. Detached ADUs on most standard residential lots are allowed up to the full 1,200 square foot maximum.
Setback Requirements
ADUs must maintain a minimum 4-foot setback from side and rear property lines. Front setback requirements follow standard zoning rules for your lot. Garage conversions that use the existing footprint may be exempt from some setback requirements.
No Owner-Occupancy Requirement
Under current California state law, there is no owner-occupancy requirement for most ADUs. This means you do not have to live on the property in order to rent out your ADU, making it a flexible investment option for property owners.
Short-Term Rentals
Short-term rentals such as Airbnb or VRBO may be allowed for your ADU depending on local rules. The City of Simi Valley has specific regulations regarding short-term rental permits, so it is important to check the latest guidelines before listing your unit.
CalHFA ADU Grant Program
The California Housing Finance Agency offers the CalHFA ADU Grant Program, which provides up to $40,000 for pre-development costs such as site preparation, architectural designs, permits, soil tests, and impact fees. This grant can significantly reduce your upfront costs when building an ADU.
Frequently Asked Questions About ADU Construction
How much does it cost to build an ADU in Simi Valley?
ADU construction costs in Simi Valley vary depending on the type and size of the unit. Garage conversions typically range from $80,000 to $150,000. Attached ADUs generally cost between $150,000 and $250,000. Detached ADUs, which involve building an entirely new structure, usually range from $200,000 to $350,000 or more. Factors that affect the final price include the size of the unit, the quality of finishes, site conditions, and whether utility connections need to be extended. We provide free personalized estimates through SafewayQuickQuote.com so you can get an accurate price range for your specific project in just 2 minutes.
How long does ADU construction take?
Most ADU construction projects in Simi Valley take between 3 and 6 months to build once permits are approved. The permitting process itself typically takes an additional 2 to 4 months depending on the complexity of the project and the city review timeline. Garage conversions tend to be on the shorter end of the construction timeline, while detached ADUs with full foundations and utility connections take longer. We manage the entire timeline from initial design through final inspection, keeping you informed at every stage so there are no surprises.
Do I need a permit to build an ADU in Ventura County?
Yes, a building permit is always required to construct an ADU in Ventura County, including in the City of Simi Valley. This applies to all ADU types -- detached units, attached units, garage conversions, and junior ADUs. The permit process involves submitting plans for review, obtaining approval from the building department, and passing inspections during and after construction. Safeway Construction handles the entire permit process for you, from preparing architectural plans to filing applications and coordinating all required inspections. We take the complexity out of permitting so you can focus on the exciting parts of your project.
Can I rent out my ADU in Simi Valley?
Yes, California state law allows homeowners to rent out their ADUs as long-term rentals. Under current regulations, there is no owner-occupancy requirement for most ADUs, meaning you do not have to live on the property to rent out the unit. This makes ADUs an excellent investment for generating rental income. Short-term rentals such as Airbnb may also be permitted depending on local regulations, so it is important to check the latest City of Simi Valley rules regarding short-term rental permits. Our team can help you understand the current regulations and design your ADU to maximize its rental potential.
What is the maximum ADU size allowed in Simi Valley?
The maximum size for an ADU in Simi Valley ranges from 800 to 1,200 square feet depending on your lot size and the type of ADU you are building. Detached ADUs are generally allowed up to 1,200 square feet on most residential lots. Attached ADUs may be limited to 50 percent of the existing living area or 1,200 square feet, whichever is less. Junior ADUs, which are built within the existing footprint of the home, are capped at 500 square feet. Setback requirements include a minimum of 4 feet from side and rear property lines. We evaluate your specific lot and help you design the largest, most functional ADU that your property allows under current regulations.
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