An ADU (Accessory Dwelling Unit) is a second, independent residential unit on your property. In California, ADUs go by many names: casitas, granny flats, in-law suites, back houses, and guest cottages. Southern California embraced ADU legalization earlier and more aggressively than other regions.For homeowners, ADUs unlock significant value: rental income potential, property appreciation, and flexible living arrangements for family. Studio Home helps homeowners capture that value with minimal hassle. Learn more and design your ADU.

Start with your primary goal: rental income, family housing, home office, or guest space. Next, evaluate your lot size, setback constraints, and utility access. Consider your local jurisdiction's ADU rules. Some cities allow larger units, others are restrictive. Budget matters too; Studio Home offers models at different price points to fit your financial plan. Finally, think long-term: will this prefab ADU work with your future plans for the property? Our consultation process walks through all these factors, so you choose the right model for your specific situation. Explore our full collection of ADU and tiny home models or use our Design Center to get instant pricing.

Permit requirements depend on your city and county. Most Southern California jurisdictions require: building permits (structural, electrical, plumbing), planning permits (zoning compliance), and potentially separate permits for mechanical systems. Some cities have consolidated ADU permits that streamline the process; others require multiple submitals. Your local jurisdiction's planning department can provide the full checklist. Studio Home handles permit coordination. We know exactly what your city requires and submit proper documentation from day one, eliminating back-and-forth delays. Start with a free consultation to clarify your specific requirements.

Total project cost depends on your design choice, site conditions, local permitting fees, foundation requirements, and finishing selections. An ADU project starts around $17k with our Signature Series ADU, but your specific cost depends entirely on your situation. Our Design Center gives you an instant estimate based on your selections. From there, you'll have a clear, fixed price for your ADU structure:no surprise change orders mid-construction.

Yes, and that's actually one of Studio Home's biggest advantages. Prefab ADUs are designed for tight spaces. If your lot has minimal square footage or challenging setback requirements, a compact ADU can still work. We assess your exact lot dimensions, setbacks, and utilities before proposing a design. Many Southern California homeowners are surprised that their 'too small' lots can actually accommodate a prefab ADU. Browse our compact tiny home models to see what fits your space.

Yes. Most homeowners finance their ADU project through home equity lines, construction loans, or cash-out refinances. Studio Home's transparent, fixed pricing makes it much easier for lenders to approve and fund your project. We can point you toward lender options and help you present your project plan to banks in your area. Explore financing options with our team to find what works for your budget.

In virtually every case, yes. Orange and San Diego County real estate market is competitive, and an ADU is a tangible asset. An ADU increases your property's market value, provides immediate rental income, and gives you flexibility for future living arrangements.Property appraisers value rental income streams, and according to a 2025 Federal Housing Finance Agency (FHFA) study, properties with ADUs had a median appraise value of 22% more than properties without ADUs from 2013 to 2023. So, your ADU could add $100K–$200K+to your property's assessed value.Learn more about our projects.

For California residents, ADUs offer independence, affordability, and flexibility. You get your own space, separate from the primary home, with privacy and autonomy. ADUs are significantly cheaper than renting a traditional apartment in Southern California. This makes them ideal for young professionals, students, or anyone seeking affordable housing. For property owners, ADUs generate rental income, increase property value, provide housing for family members, and offer use flexibility. A Studio Home ADU can be many things throughout its life:guest space, rental unit, office, pool house or home office. Check out ourADU collection or explore office sheds.

Yes, and this is increasingly popular in Southern California, Los Angeles, San Diego, Oceanside, Costa Mesa and surrounding areas. With proper permits and local approval, you can dedicate your ADU to a home gym, art studio, yoga space, or photography studio. Some cities allow this with minimal zoning changes; others require specific permits. Studio Home can help you explore whether your jurisdiction allows non-residential use or help you design a hybrid space that serves both purposes. The key is obtaining local approval before you build. Browse our creative art and studio designs or gym and wellness studios to see flexible options.

On-site assembly typically takes 1 to 2 weeks, depending on ADU size and site conditions. Our crews arrive with prefabricated panels and modules, unload, connect utilities, and finish out the interior. The real timeline driver isn't assembly. It's permitting and site prep. Permitting can take 2 to 4 months depending on your jurisdiction; site prep (foundation, utilities) another 2 to 4 weeks. So your total project timeline is typically 3 to 6 months from permit approval to move-in. That's still dramatically faster than traditional construction, which often takes 9 to 12 months or longer. Learn about our complete process. Ready to start? Use our Design Center for instant estimates and explore financing options.