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An Accessory Dwelling Unit (ADU) is a secondary housing unit on a residential lot. California ADU laws, including AB 68, SB 13, and subsequent legislation, have expanded where ADUs can be built, though specific eligibility depends on your lot size, zoning, setback distances, and local jurisdiction requirements. Most single-family lots in California can accommodate an ADU. Use our Site Eligibility tool to check your property.

An ADU is a fully permitted, independent dwelling unit with its own kitchen, bathroom, entrance, and utility connections. A guest house typically does not include a full kitchen and may not meet building code requirements for independent habitation. ADUs are legal dwelling units that can be rented, used for family housing, or used as independent living space. They add appraised value to your property and appear on your property records.

California law (AB 1033 and related legislation) generally prevents HOAs from outright prohibiting ADUs, though they may impose reasonable design and aesthetic standards. If your HOA has restrictions, we recommend reviewing your CC&Rs and consulting with your HOA board. In most cases, state law takes precedence over HOA rules when it comes to ADU construction on single-family lots.

Your ADU is a fully permitted dwelling unit that can be used for long-term rental income, housing for aging parents or adult children, a home office or studio, guest quarters, or your own private living space. Some areas also permit short-term rentals, though local regulations vary. Your ADU is your property — you decide how to use it.

A prefab (factory-built) ADU is constructed indoors in a controlled manufacturing facility, then delivered to your property as a complete or near-complete unit. This approach offers faster construction timelines, more consistent quality, predictable pricing, and minimal on-site disruption compared to traditional site-built construction, which takes place entirely on your property over several months. Both types require the same permits and meet the same building codes.

EVO ADU offers five models: the Compact (350 sq ft studio), Studio (430 sq ft with office), One (530 sq ft one-bedroom), Two (660 sq ft two-bedroom), and Two Plus (800 sq ft two-bedroom, two-bath). Each model is pre-engineered for California building codes and comes with premium finishes, full-size appliances, and energy-efficient systems included.

EVO ADUs are designed with a curated selection of finishes and configurations to maintain quality and keep costs predictable. You can choose from exterior cladding styles (vertical panel or tile pattern), exterior colors (Arctic White, Forest Green, Warm Bronze, or custom), interior flooring (Natural Oak or Dark Oak), cabinetry finish (Antique White or Natural Oak), and optional upgrades. Our online Configuration tool lets you build and price your ideal unit.

Every EVO ADU includes premium interior finishes, full-size kitchen appliances (refrigerator, range, dishwasher, microwave), quartz or stone countertops, frameless glass shower enclosures, LED lighting throughout, mini-split HVAC system, tankless water heater, dual-pane vinyl windows, standing-seam metal roof, fiber cement exterior cladding, and all electrical and plumbing systems. The base price covers the complete factory-built unit plus installation on your prepared foundation.

Site work, foundation construction, utility connections (water, sewer, electrical trenching to your existing service), permits and fees, and any required upgrades to your existing electrical panel or utility services are quoted separately based on your property conditions. These costs vary significantly by location and site — a flat, accessible lot with nearby utility connections will cost less than a sloped lot requiring extensive grading.

EVO ADUs feature 9-foot ceilings throughout, which creates a sense of spaciousness that exceeds many traditional homes. The generous ceiling height combined with large windows and open floor plans makes even our smallest model feel significantly larger than its square footage suggests.

Most EVO ADU projects are completed within 4 to 6 months from contract to occupancy. This includes site evaluation (1–2 weeks), permitting (4–8 weeks), factory production (6–8 weeks, concurrent with permitting and site prep), site preparation and foundation (2–4 weeks), delivery and installation (1–2 weeks), and final inspection (1–2 weeks). Timelines vary by jurisdiction and site conditions.

Yes, ADUs require building permits from your local jurisdiction. Our units come with a state-approved plan set that has been pre-certified for structural, mechanical, electrical, and plumbing compliance. This dramatically simplifies the permitting process. We handle all permit submissions, plan review responses, and building department communications on your behalf. California law requires cities to process ADU permits within 60 days.

Our team reviews your property using satellite imagery and city records, then conducts an on-site visit. We verify zoning compliance, measure setback distances from property lines and existing structures, assess utility connection points, evaluate delivery truck and crane access, check soil conditions for foundation requirements, and confirm that your lot can accommodate your chosen model. The site evaluation determines the scope and cost of site work needed.

Your ADU is built entirely off-site in our factory, so there is no on-site construction activity until the site preparation and delivery phases. During site prep (2–4 weeks) and installation (1–2 weeks), you do not need to be present but should be available for questions. Our team coordinates directly with your local building department for all inspections.

We assess delivery access during the site evaluation phase. EVO ADUs are delivered on standard flatbed trucks and placed by crane. We need a minimum clear path for the delivery truck and adequate crane reach to your placement location. If your property has limited access, we will identify this early and discuss solutions. In some cases, temporary fence removal, neighbor coordination, or alternative placement strategies are needed.

EVO ADU prices start at $135,800 for the Compact model and go up to $228,000 for the Two Plus. These prices include the complete factory-built unit with all finishes, appliances, and systems, plus installation on your prepared foundation. Site work, foundation, utility connections, and permits are quoted separately based on your property. Total all-in project costs typically range from $180,000 to $320,000 depending on model and site conditions.

We partner with ADU-specialized lenders offering HELOCs, construction loans, cash-out refinancing, and government-backed renovation loans (FHA 203k, Fannie Mae HomeStyle). Most options allow you to keep your existing mortgage in place. Monthly payments start from approximately $1,053. Low and zero down payment options are available for qualified borrowers. Visit our Financing page for detailed information on each option.

No. Our unit pricing is fixed at the time of contract — no change orders or surprise markups. Site work costs are quoted separately after our site evaluation because they vary significantly by property. We provide a detailed, itemized site work quote before you commit, so you know the full project cost upfront. The only variables are permit fees (set by your local jurisdiction) and any unforeseen conditions discovered during excavation.

Adding an ADU will likely result in an increase in your assessed property value and therefore your property taxes. The amount depends on your county assessor and the value assigned to the ADU. However, California Proposition 13 protections mean that only the new construction (the ADU) is assessed at current market value — your existing home assessment is not affected. The rental income from your ADU typically far exceeds any property tax increase.

Yes. Our payment structure is tied to project milestones — typically a deposit at contract, a payment at the start of factory production, and a final payment upon delivery and installation. This ensures you are paying as work is completed. Specific payment terms are outlined in your contract. If you are using a construction loan, your lender will coordinate disbursements with our milestone schedule.

EVO ADUs are manufactured in our California-based factory. Building locally means shorter delivery distances, familiarity with California building codes, and the ability to support installation and warranty service across the state. Our factory uses precision CNC cutting, controlled-environment assembly, and multi-point quality inspections at every stage of production.

Every EVO ADU is designed and built to meet the California Building Code (CBC), California Residential Code (CRC), California Energy Code (Title 24), and all applicable state and local regulations. Our units carry a state-approved insignia certifying compliance. This pre-certification significantly simplifies local permitting, as the structural, mechanical, electrical, and plumbing systems have already been reviewed and approved at the state level.

EVO ADUs exceed California Title 24 energy requirements. Features include high-performance wall insulation (R-21), roof insulation (R-38), floor insulation (R-19), dual-pane vinyl windows, LED lighting throughout, a high-efficiency mini-split HVAC system, and a tankless water heater. The tight construction tolerances achieved in factory production further improve energy performance by minimizing air leakage. Many homeowners report utility costs under $100 per month.

EVO ADUs are typically installed on a concrete slab or raised foundation, depending on your site conditions and local requirements. The foundation is built on-site during the site preparation phase, while your unit is being manufactured in the factory. Foundation design is engineered for your specific site conditions including soil type, slope, and seismic requirements. Foundation costs are included in the site work quote.

EVO ADUs come with a comprehensive warranty covering structural components, mechanical systems, appliances, and finishes. Individual component warranties vary by manufacturer. We provide all warranty documentation, maintenance guides, and manufacturer contact information at your move-in walkthrough. Our team is available to coordinate any warranty claims on your behalf.

ADU rental income varies by location, size, and finishes. Typical ranges across California markets: Inland Empire $1,600–$2,500/month, Los Angeles $2,200–$3,500/month, Orange County $2,400–$3,800/month, San Diego $2,000–$3,200/month, Santa Barbara $2,500–$4,000/month, and Bay Area $2,800–$4,500/month. Premium finishes and larger models command higher rents. In most markets, ADU rental income exceeds the monthly financing payment.

A permitted, quality ADU typically adds 20 to 35 percent to your property value. The exact amount depends on your local market, the size and quality of the ADU, and current rental rates. In many California markets, the appraised value increase exceeds the total project cost. This means you build equity immediately upon completion. The value increase is recognized by appraisers, lenders, and buyers.

Short-term rental regulations vary significantly by city and county. Some jurisdictions allow short-term rentals in ADUs, others restrict them to the primary residence only, and some prohibit them entirely. Check your local ordinances before planning to use your ADU for short-term rental purposes. Long-term rental demand is consistently strong throughout California, providing reliable income regardless of short-term rental regulations.

An ADU is one of the highest-ROI home improvements you can make because it is the only improvement that generates monthly income. A kitchen remodel, bathroom renovation, or landscaping project adds value but produces no income. An ADU generates rental income from day one while adding comparable or greater value to your property. Over a 10-year period, cumulative rental income plus property value increase typically far exceeds the total project investment.