Project Overview
Converting an attached front-facing garage gave the homeowners an easy path to add a small, income-generating apartment without touching their backyard.
Project Details
Converting an attached front-facing garage gave the homeowners an easy path to add a small, income-generating apartment without touching their backyard. The 20 × 20 ft space sat right off the driveway, so access, parking, and utilities were already close at hand. GatherADU turned this unused square footage into a bright one-bedroom, one-bath dwelling that now rents for about $2,000 a month.
Permitting ran a full four months. City reviewers focused on fire-separation details between the new unit and the main house, plus Title 24 energy notes. Two correction cycles later, the plans cleared. Because the ADU stayed under 750 sq ft, the owners avoided hefty impact fees, keeping soft costs in check.
Construction moved quickly—just over three months door-to-door. Crews first insulated the single-wall framing, then leveled and sealed the existing slab. An L-shaped kitchen went along the back wall to limit plumbing runs. Quartz counters, white shaker cabinets, and stainless-steel appliances give the small space a full-size feel. Luxury-vinyl-plank floors tie it all together and stand up to tenants. A mini-split unit heats and cools the flat efficiently, while new low-E windows bring in plenty of daylight and meet energy code.
All-in spending came in close to $110 k, covering design, permits, labor, and finishes. A post-completion appraisal estimated the ADU added about $150 k to the property’s value—an instant equity boost that outpaced the build cost. With steady rent now flowing, the owners expect the project to pay for itself in under five years.
This project shows how a front, attached garage can become a high-value living space with a clean design, modern finishes, and a tight construction schedule. For many Simi Valley homeowners, it’s a fast track to extra income and higher resale value without a major addition.
Our Approach
Discovery & Planning
We analyzed the property, zoning regulations, and homeowner goals to create a customized feasibility plan.
Design
Our designers created custom floor plans maximizing space while respecting the budget and aesthetic preferences.
Permitting
We navigated city requirements and handled all paperwork, securing permits efficiently.
Construction
Our licensed contractors brought the ADU to life with premium materials and meticulous attention to detail.
Understanding Garage Conversion ADUs
Converting an existing garage into a fully-functional living space, often the most cost-effective ADU option. This project in Simi Valley exemplifies the benefits and possibilities of this ADU type, demonstrating how homeowners can maximize their property's potential while creating valuable living space.
Key Benefits
Ideal For
Simi Valley ADU Market Insights
Simi Valley is located in Ventura County and represents one of the most dynamic ADU markets in the area. With a population of 127,000 and median home prices of $780,000, the demand for accessory dwelling units continues to grow as homeowners seek to maximize their property value and generate additional income.
Why Build an ADU in Simi Valley?
ADU Investment Potential in Simi Valley
Building an ADU in Simi Valley represents a significant investment opportunity. Based on current market conditions and rental rates in the Ventura County area, homeowners can expect strong returns on their ADU investment. The combination of high rental demand, favorable regulations, and property value appreciation makes this an attractive option for long-term wealth building.
Investment Note: ADUs in Simi Valley typically pay for themselves within 8-12 years through rental income alone, while also providing immediate property value appreciation. Many homeowners also benefit from tax advantages and depreciation deductions.
Typical ADU Building Timeline in Simi Valley
Understanding the ADU construction timeline helps homeowners plan effectively. Here's what to expect when building a garage conversion adu in the Ventura County area.
Feasibility & Design
2-4 WeeksSite analysis, zoning verification, initial design concepts, and cost estimation. We assess your property's ADU potential and create preliminary plans.
Architectural Plans
3-6 WeeksDetailed architectural drawings, structural engineering, Title 24 energy compliance, and complete permit-ready documentation.
Permitting
6-10 weeksPermit application submission, plan check review, and approval process. Simi Valley offers streamlined ministerial review for qualifying ADU projects.
Construction
3-6 monthsFoundation, framing, MEP rough-in, insulation, drywall, finishes, and final inspections. Our licensed contractors manage every phase with quality craftsmanship.
Final Inspection & Move-In
1-2 WeeksCertificate of occupancy, utility connections, final walkthrough, and handover. Your ADU is now ready for occupancy or rental.
Ready to Start Your ADU Project in Simi Valley?
Get expert guidance on designing and building your own accessory dwelling unit. Our team specializes in Ventura County ADU projects.
ADU Regulations in Simi Valley
Understanding local ADU regulations is crucial for a successful project. Simi Valley follows California state ADU laws while implementing local standards. Here are the key regulations that applied to this project and similar builds in the area.
Size Limits
- Detached ADU: Up to 1,200 sq ft
- Attached ADU: 50% of primary home
- JADU: Up to 500 sq ft
- No minimum size requirement
Setbacks
- Rear setback: 4 feet minimum
- Side setback: 4 feet minimum
- No front setback for JADUs
- Conversions: Existing setbacks apply
Height Limits
- Detached: 16-18 feet typical
- 2-story ADUs: Up to 25 feet
- Must not exceed primary dwelling
- Local variations may apply
Parking
- No parking within 1/2 mile of transit
- Garage conversions: No replacement
- JADUs: No parking required
- Tandem parking allowed
Pro Tip: California's ADU laws are updated regularly. Our team stays current on all local and state regulations in Simi Valley to ensure your project meets current requirements and takes advantage of all available streamlining provisions.
Frequently Asked Questions About ADUs in Simi Valley
How much does it cost to build an ADU in Simi Valley?
ADU costs in Simi Valley typically range from $80,000 for garage conversions to $350,000+ for larger detached units. Factors affecting cost include size, finishes, site conditions, and utility connections. Based on current market rates, a typical garage conversion adu like this project costs approximately $80,000-$180,000.
How long does it take to get ADU permits in Simi Valley?
Simi Valley currently processes ADU permits in approximately 6-10 weeks. California law requires cities to approve or deny ADU applications within 60 days. Many jurisdictions, including Simi Valley, offer expedited processing for standard designs and pre-approved plans.
What is the rental income potential for an ADU in Simi Valley?
Based on current market rates in Ventura County, a 1-bedroom ADU can rent for approximately $2,000/month, while 2-bedroom units command around $2,500/month. This translates to an estimated annual return of 4.8% on your investment.
Do I need to live on the property to build an ADU in Simi Valley?
California law prohibits cities from requiring owner-occupancy for ADU permits. You can build an ADU on your property regardless of whether you live there. However, some financing options may have occupancy requirements, and short-term rental rules vary by location.
Can I Airbnb my ADU in Simi Valley?
Short-term rental regulations vary by city and neighborhood. Simi Valley has specific rules governing vacation rentals that may require registration, permits, or occupancy requirements. We recommend consulting local regulations and our team can help you understand the options for your specific property.
ADU Services in Nearby Ventura County Areas
GatherADU provides comprehensive ADU design and construction services throughout Ventura County. We serve homeowners in Simi Valley and surrounding communities with the same expert guidance and quality craftsmanship demonstrated in this project.
Whether you're considering a garage conversion adu like this project or exploring other ADU options, our team understands the unique characteristics and regulations of each neighborhood in the Ventura County area. Contact us to discuss your specific property and goals.
Helpful ADU Resources
Explore our comprehensive ADU resources to learn more about the process, costs, regulations, and design options available to you.
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