ADU Construction Across Ventura County & Los Angeles
Full-service ADU builder serving 20+ cities across Ventura County and the San Fernando Valley. We design, permit, and build accessory dwelling units — detached guest houses, garage conversions, junior ADUs, and SB9 lot splits. One team, one contract, from first sketch to final inspection.
Book a Free ADU Consultation
Tell us about your project — we'll call you back within 1 business day.
No spam. No obligation. We respond within 1 business day.
California ADU Grant: Up to $40,000 Available
California homeowners may qualify for up to $40,000 in ADU construction grants through the CalHFA ADU Grant Program. This funding covers pre-development costs including site prep, architectural plans, permits, soil tests, and impact fees. We help you navigate the application process from start to finish.
Start with a Free EstimateADU Construction by County
ADU regulations, permit processes, and costs differ between Ventura County and Los Angeles County. Choose your area for county-specific details.
Ventura County
Simi Valley, Thousand Oaks, Moorpark, Camarillo, Oxnard, Newbury Park & Oak Park. County-specific regulations, permit process, and pricing.
Los Angeles County
Calabasas, Woodland Hills, Sherman Oaks, Encino, Santa Clarita, Northridge, Agoura Hills & more. LA County rules, permits, and pricing.
California ADU Rules at a Glance
Key statewide development standards for building an ADU in California. Local city and county rules may add additional requirements.
1,200 sf
Max Size
4 ft side/rear
Setbacks
16 ft
Height
0-1 spaces
Parking
No minimum
Lot Size
1 ADU + 1 JADU
ADUs Per Lot
All residential
Zones
Yes
Rental Allowed
Most lots
SB9 Eligible
Licensed ADU Builders Across Southern California
Safeway Construction specializes in building accessory dwelling units across Ventura County and the San Fernando Valley. 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 initial concept through move-in day.
California's ADU regulations have evolved significantly in recent years, making it easier than ever to add secondary units. However, navigating permits still requires knowledge of state laws, local zoning codes, and building requirements — and those vary between Ventura County and LA County. Our team stays current on regulations in every city we serve so we can guide you through the process with confidence.
With over 20 years of residential construction experience and a 5.0-star rating on Google, Safeway Construction has earned the trust of homeowners from Simi Valley to Sherman Oaks. We bring that same commitment to quality, transparency, and customer satisfaction to every ADU project.
Types of ADUs We Build
We build every type of ADU allowed under California law. Each option has different costs, timelines, and benefits depending on your property and goals.
Detached ADU
A standalone structure built separately from your main home. Perfect for a guest house, rental unit, or multigenerational living space. Offers complete privacy with its own entrance, kitchen, bathroom, and living area.
Attached ADU
An addition connected directly to your existing home, sharing at least one wall. An efficient way to add living space without building a separate structure. Integrates seamlessly with your home’s existing architecture and utilities.
Garage Conversion
Transform your existing garage into a fully functional living space. 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 ADU (JADU)
Built within the existing footprint of your home with a separate entrance and small cooking facility. The most affordable way to create an independent living unit. Can be built alongside a standard ADU for maximum rental income.
SB9 Lot Split
California’s SB9 (HOME Act) allows you to split your single-family lot into two separate parcels. Each parcel can have up to two housing units — potentially four units on what was one lot. Eligibility varies by city and zone.
ADU + JADU Combo
California law allows both a standard ADU and a Junior ADU on the same single-family property. Your main home, a detached ADU in the backyard, and a JADU within the home — all on one lot. Maximizes rental income and property value.
Popular ADU Sizes & Pricing
Choose the ADU size that fits your property and budget. Prices reflect custom-built units across our Ventura County and Los Angeles service area, including design, permits, and construction.
Studio ADU
400 sq ft
1-Bedroom ADU
600 sq ft
$160K - $240K
Separate bedroom, full kitchen, living area, in-unit laundry hookup
Get Estimate2-Bedroom ADU
900 sq ft
$200K - $300K
Two bedrooms, full kitchen, living/dining area, storage, laundry
Get EstimateGarage Conversion
400 - 600 sq ft
$90K - $150K
Uses existing structure, most cost-effective, no new foundation needed
Get EstimateHow ADU Construction Works
From your first call to handing over the keys, here is exactly what to expect when you build an ADU with Safeway Construction.
Free Consultation
We visit your property, assess the site, discuss your goals, and evaluate what your lot allows under current California and local regulations.
Design & Plans
Our team creates architectural drawings and 3D renderings of your ADU. You approve the design before we move forward.
Permits
We prepare and submit all permit applications to your local building department — whether that’s in Ventura County or Los Angeles County. We handle plan check and revisions.
Construction
Foundation to finish, our crew builds your ADU. Regular progress updates, clean job site, and on-time completion.
Final Inspection & Handover
City inspector signs off. We do a final walkthrough with you, address any punch list items, and hand over the keys.
Why Choose Safeway for Your ADU
Full Permit Management
We handle every aspect of the ADU permitting process — from architectural plans and engineering documents to filing applications and coordinating inspections. You never have to set foot in a planning office.
Two-County Expertise
ADU regulations differ between Ventura County and LA County, and between individual cities. We maintain up-to-date knowledge of building codes, zoning, and permit processes across every city we serve.
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, keeps your project on budget, and streamlines the timeline.
On-Time Completion
We provide a detailed project schedule before construction begins and hold ourselves accountable to that timeline. Our regional presence means fast response times and no wasted travel days.
What Homeowners Say About Safeway
5.0 stars on Google · Real reviews from real remodel projects across Ventura County & LA
Aamir M.
Feb 20, 2025
If you're looking for a contractor who actually listens and delivers, this is the team. I had a vision for my space, and Adam and his crew made it hap...
Sue F.
May 27, 2024
We highly recommend Safeway Construction. Adam and Mo were great to work with every step of the way. Always available to help, return calls and comple...
Kim S.
Aug 21, 2022
I could not be any happier! Adam, Moh and the rest of the guys are fantastic! Price was good, service top notch! These guys came when they said they w...
Heather L.
Oct 11, 2023
Safeway has just completed a bathroom remodel for us. It included a tub-to-shower conversion, new vanity, flooring, shower surround and door, lighting...
Rena P.
Apr 11, 2022
We were so GLAD we hired Adam and Safeway Construction. During many delays with our insurance, they were helpful and positive. They had the BEST plan ...
Chris A.
Mar 4, 2024
The team was professional, timely, and very focused to get the work done immediately. I am very grateful for their efficiency and their excellent craf...
ADU Construction Cost Ranges
ADU costs depend on type, size, finishes, and site conditions. Here are typical price ranges for projects across our service area. Get a personalized estimate in 2 minutes at our free cost calculator.
Garage Conversion
Most cost-effective
$90K - $150K
Junior ADU
Within existing home
$60K - $100K
Attached ADU
Shares wall with home
$150K - $250K
Detached ADU
Standalone structure
$200K - $350K
Frequently Asked Questions About ADU Construction
How much does it cost to build an ADU in Southern California?
ADU construction costs in the Ventura County and Los Angeles area vary by type and size. Garage conversions typically range from $90,000 to $150,000. Junior ADUs built within existing homes cost $60,000 to $100,000. Attached ADUs generally run $150,000 to $250,000, and detached ADUs range from $200,000 to $350,000. Final pricing depends on unit size, finishes, site conditions, and local permit fees. Use our free cost calculator to get a personalized estimate for your property in 2 minutes.
How long does ADU construction take?
Most ADU projects take 3 to 6 months to build once permits are approved. The permitting timeline adds 2 to 4 months depending on the city — some municipalities like Simi Valley and Thousand Oaks process faster than others. Garage conversions tend to be quicker, while detached ADUs with full foundations take longer. We manage the entire timeline from design through final inspection.
Do I need a permit to build an ADU in California?
Yes, a building permit is always required. This applies to all ADU types — detached, attached, garage conversions, and junior ADUs. The permit process involves submitting architectural plans, obtaining building department approval, and passing inspections. Requirements vary by city and county. Safeway Construction handles the entire permit process for every city we serve, from plan preparation to filing and inspections.
Can I rent out my ADU in California?
Yes, California state law allows homeowners to rent out ADUs as long-term rentals. There is no owner-occupancy requirement for most ADUs, so you don't have to live on the property. Short-term rentals like Airbnb may also be allowed depending on your city's rules — regulations vary between Ventura County cities and LA County cities. Our team helps you understand what's permitted in your specific area.
What is the maximum ADU size allowed in California?
California law allows detached ADUs up to 1,200 square feet on most residential lots. Attached ADUs may be limited to 50 percent of the existing home or 1,200 square feet, whichever is less. Junior ADUs are capped at 500 square feet. Setback requirements are typically 4 feet from side and rear property lines. Specific maximums can vary by city — we evaluate your property and help you build the largest ADU your lot allows.
What is SB9 and can I split my lot?
SB9 (the California HOME Act) allows homeowners to split a single-family lot into two parcels. Each parcel can then have up to two units, potentially allowing four units on one lot. SB9 applies to most single-family zoned properties not in historic districts, fire hazard zones, or environmentally sensitive areas. Each new parcel must be at least 1,200 square feet. Eligibility varies by location — we can evaluate whether your property qualifies.
Can I build both an ADU and a Junior ADU on the same property?
Yes. California law allows one standard ADU and one Junior ADU on the same single-family property. That means your lot can have your main home, a detached ADU of up to 1,200 square feet, and a JADU of up to 500 square feet within the existing home — all on one lot. This combination maximizes rental income and property value.
How do I finance an ADU in California?
Common financing options include home equity loans and HELOCs, construction loans, and cash-out refinancing. The CalHFA ADU Grant Program provides up to $40,000 for pre-development costs like permits, plans, and site prep. Many homeowners combine multiple methods. We can connect you with local lenders who specialize in ADU financing across Ventura County and Los Angeles.
What is the ROI on building an ADU?
ADUs in the Ventura County and Los Angeles area generate strong returns. A well-built ADU can increase property value by $150,000 to $300,000 or more. Monthly rental income typically ranges from $1,800 to $2,800 for a one-bedroom and $2,200 to $3,500 for a two-bedroom. Many homeowners recoup their investment within 5 to 8 years through rental income alone, plus the added property value.
Do I need an architect to build an ADU?
You need architectural plans to obtain a building permit. These must include floor plans, elevations, structural details, electrical, plumbing, and HVAC layouts. Safeway Construction handles all design as part of our design-build process — you work with one team from concept through construction, eliminating the need to hire and coordinate a separate architect.
ADU Guides & Resources
Learn more about ADU construction, costs, regulations, and financing in California.
City-by-City ADU Guides
Detailed guides for ADU construction, costs, permits, and regulations specific to your city.
ADU Construction by City
Ventura County
View county guide →Ready to Start Your ADU?
Two ways to get started — pick what works for you.
Book a Free Consultation
Tell us what you need — we'll call you back.
No spam. No obligation. We respond within 1 business day.
Get an Instant Estimate
Use our AI tool to get a price range in 2 minutes. No phone call needed.
Answer 4 quick questions. Get your price range instantly.
Free. No sign-up required.