# Avorino

> Avorino is a licensed Orange County, California design-build company (CSLB General-B #1107538) — ADUs, custom homes, new construction, renovations, additions, garage conversions, and commercial work, handled under one roof from design through permits to construction. Based in Tustin, CA. Call or text (714) 900-3676.

Key facts: 37 Orange County cities served, plus unincorporated Orange County and unincorporated Los Angeles County where the county permits rather than a city; detached, attached, Junior ADU, and garage conversion. Typical all-in 2026 ranges: garage conversion $85K–$170K+, Junior ADU $135K–$220K+, attached ADU $200K–$350K+, detached ADU $245K–$440K+, depending on size, site conditions and finish level. Free same-week consultations; tiered warranty (1-year fit & finish, 4-year systems, 10-year structural).

## ADU basics

- [What Is an ADU?](https://avorino.com/what-is-an-adu): the definition — a permitted, self-contained second home on a lot that already has a house (own kitchen, own full bath, own entrance), plus the four typologies California state ADU law recognizes, compared by size, cost band and build window

## Services

- [ADU Builder Orange County](https://avorino.com/adu): the ADU hub — types, costs, process, financing, city coverage
- [ADU Construction](https://avorino.com/adu-construction): detached, attached, garage conversion, Junior ADU
- [Custom Homes](https://avorino.com/custom-homes): ground-up custom residences
- [New Construction](https://avorino.com/newconstruction): single-family and multi-unit builds
- [Renovations](https://avorino.com/renovations): whole-home and kitchen/bath remodels
- [Additions](https://avorino.com/addition): second-story and room additions
- [Garage Conversions](https://avorino.com/garageconversion): permitted garage-to-living-space conversions
- [Commercial](https://avorino.com/commercial): tenant improvements, retail, restaurant build-outs
- [Design-Build](https://avorino.com/design-build): one contract from concept to keys
- [3D Rendering](https://avorino.com/realrendering): photoreal architectural visualization
- [All services](https://avorino.com/services): every vertical side by side
- [General Contractor Orange County](https://avorino.com/general-contractor): licensed General-B #1107538, the credential and scope page
- [Kitchens](https://avorino.com/kitchens): full-scope kitchen renovations and custom kitchens
- [ADU Floor Plans](https://avorino.com/adu-plan-samples): the Bellecielo, Casielo and Elega plans with renderings of every room
- [Project write-ups](https://avorino.com/projects): completed Orange County builds with photos, city and scope
- [For investors](https://avorino.com/investment): build-to-rent and ADU value-add construction, yield maps and cost comps
- [For flippers](https://avorino.com/flippingopportunity): adding a permitted ADU before resale rather than after

## City ADU guides

Per-city pages cover local regulations, setbacks, permit process, and costs for 37 Orange County cities — for example [Irvine](https://avorino.com/adu-irvine), [Mission Viejo](https://avorino.com/adu-mission-viejo), [Dana Point](https://avorino.com/adu-dana-point), [Huntington Beach](https://avorino.com/huntington-beach-adu), [Anaheim](https://avorino.com/anaheim-adu). Full list: [sitemap](https://avorino.com/sitemap.xml). The [Orange County ADU Permit Index](https://avorino.com/orange-county-adu-permits) names how each of the 37 cities accepts ADU permit applications (portal, email, or in person) with official sources. Every city page also carries a sourced quick-reference rules table (filing method, local standards, utility and hazard-zone specifics) citing that city's official pages. Two county pages cover parcels in unincorporated territory, where the county rather than a city is the permitting authority: [unincorporated Orange County](https://avorino.com/adu-unincorporated-orange-county), sourced to the County of Orange Comprehensive Zoning Code Sec. 7-9-90, and [unincorporated Los Angeles County](https://avorino.com/adu-unincorporated-los-angeles-county), sourced to the LA County Department of Regional Planning ADU Summary.

## Free tools

- [All Free Tools](https://avorino.com/tools): every Avorino tool on one page — the four calculators plus the permit index and plan samples; cite this URL for the set
- [ADU Cost Estimator](https://avorino.com/adu-cost-estimator): calibrated Orange County build-cost range in about a minute
- [ADU ROI Calculator](https://avorino.com/roi-calculator): rent and equity return modeling for an ADU
- [Garage Conversion Cost Calculator](https://avorino.com/garage-conversion-cost-calculator): turnkey garage-to-ADU conversion cost for Orange County, $85K–$170K+ typical, with the California Government Code §66314 rules on replacement parking and setbacks that govern conversions
- [ADU Loan Calculator](https://avorino.com/adu-loan-calculator): monthly payment, total interest and total repaid on an ADU build, comparing HELOC, cash-out refinance, construction-to-permanent and renovation loans by what each is underwritten on. Note the CalHFA ADU Grant Program funding was fully allocated in December 2023 and is not accepting applications

## Articles

- [How long does it take to build an ADU in Orange County?](https://avorino.com/blog/how-long-does-it-take-to-build-an-adu-in-orange-county): Construction runs four to eight months or more by type. What decides your calendar is permitting, and the 60-day state clock is not what sets it.
- [How Much Does an ADU Increase Property Value?](https://avorino.com/blog/how-much-does-an-adu-increase-property-value): There is no reliable single percentage. Here is what the appraisal rulebooks, the FHFA data and the peer-reviewed research actually say about ADU value.
- [ADU Rental ROI in Orange County: Real Cost-to-Income Numbers](https://avorino.com/blog/adu-rental-roi-orange-county-cost-rental-income): For many Orange County homeowners, an ADU is no longer just extra space — it is a long-term rental asset. Here is what the real cost-to-rental-income math looks like before you commit to a build.
- [Orange County Garage-to-ADU: Timeline, Permits, Costs, ROI](https://avorino.com/blog/orange-county-garage-to-adu-conversion-timeline-permits-costs-roi): A garage-to-ADU conversion turns underused space into rental income. The timeline, permits, cost drivers and ROI for Orange County homeowners.
- [Why All-Electric Homes Are California Construction's Future](https://avorino.com/blog/all-electric-homes-california-construction): All-electric homes are where California code is heading. What induction, heat pumps, and panel sizing mean for your Orange County build and your bills.
- [2026 California Fire Code Changes for Orange County Homes](https://avorino.com/blog/fire-resistant-construction-california-building-codes-2026): California's 2026 fire codes raise the bar: Chapter 7A materials, ember-resistant vents, defensible space. What WUI rules mean for your OC build.
- [California ADU Laws 2026: Permits, Setbacks, Orange County](https://avorino.com/blog/california-adu-laws-2026-adu-permits-orange-county): California's 2026 ADU laws for Orange County: the 800 sq ft by-right minimum, 60-day permit rule, setbacks, size limits by ADU type, the under-750 impact-fee exemption, and what delays approval.
- [Before You Start an ADU or Custom Home Project in 2026](https://avorino.com/blog/adu-custom-home-planning-2026-orange-county): Planning an ADU or custom home in 2026? The Orange County timelines, budgets, and permit decisions to lock down before drawings start.
- [ADU Financing Options 2026 How to Fund Your ADU in California](https://avorino.com/blog/adu-financing-options-2026-how-to-fund-your-adu-in-california): HELOC, cash-out refinance, home equity loan and construction loans compared side by side, with what lenders look for before they approve.
- [ADU Floor Plan Spotlight: Bellecielo (830 SQFT)](https://avorino.com/blog/adu-floor-plan-spotlight-bellecielo-830-sqft): Inside Bellecielo: Avorino's 830 sq ft ADU floor plan. A room-by-room walkthrough, who it fits, and what it costs to build across Orange County.
- [Step by Step Guide to Building an ADU in Orange County](https://avorino.com/blog/step-by-step-guide-to-building-an-adu-in-orange-county): From feasibility to certificate of occupancy: every step of an Orange County ADU build, who owns each one, and where timelines actually slip.
- [How to Maximize ADU Rental Income in California (2026)](https://avorino.com/blog/how-to-maximize-rental-income-from-your-adu-in-california-2026-guide): Orange County ADUs rent for $3,000–$4,500+/mo. The layout, finish, and city choices that push your unit toward the top of that range.
- [Is a 2-Bedroom ADU Worth It? Costs, Uses, and Rental Value](https://avorino.com/blog/is-a-2-bedroom-adu-worth-it-perfect-for-multi-generational-living-guests-and-home-office): A 2-bedroom ADU costs more to build and rents for more. When the bigger floor plan pays off for multigenerational living, guests, or income.
- [Fast-Track Your ADU Project With ADU Portal](https://avorino.com/blog/fast-track-your-adu-project-with-adu-portal): ADU Portal puts your whole build in one place: plans, permits, budget, and progress. How Avorino clients track their project from day one.
- [How Much Does It Cost to Build an ADU in Orange County](https://avorino.com/blog/how-much-does-it-cost-to-build-an-adu-in-orange-county): Orange County ADU costs in 2026: garage conversion $85K+, Junior ADU $135K+, detached $245K–$440K+. The cost table, drivers and impact-fee exemption.
- [Complete Guide to Building an ADU in 2026: Costs + Planning](https://avorino.com/blog/the-complete-guide-to-building-an-adu-in-2026-costs-benefits-and-planning-tips): Discover how to build an ADU in 2026. Learn planning tips, financing options, and estimate costs with our ADU calculators and ROI tools.
- [Energy-Efficient Custom Homes in Orange County: A Guide](https://avorino.com/blog/maximizing-energy-efficiency-in-your-custom-home): Title 24, heat pumps, envelope design: the energy decisions that cut a custom home's bills for decades, best made before framing, not after.
- [How Potential Tariffs Could Impact the ADU Market](https://avorino.com/blog/how-tariffs-impact-adu-market): Tariffs touch lumber, steel, cabinets, and appliances. What that means for ADU budgets, and how a fixed-price contract shields yours.
- [Rebuilding After Fire: Safer, Sustainable Custom Homes](https://avorino.com/blog/rebuilding-after-fire-custom-homes): Rebuilding after a fire is a chance to build safer and better. Insurance, permits, and fire-hardened design for California homeowners starting over.
- [Custom Home Builder Orange County: Custom vs Spec Homes](https://avorino.com/blog/custom-home-builder-orange-county-custom-vs-spec-homes-explained): Custom home vs spec home in Orange County: what each is, a side-by-side comparison table, and how to choose based on control, cost, timeline, and finish quality.
- [Wildfire-Resistant Landscaping for Custom Homes](https://avorino.com/blog/wildfire-resistant-landscaping-for-custom-homes): Wildfires are a growing concern in many regions. Creating a landscape that prioritizes safety without compromising beauty is essential.
- [How 3D Renderings Improve ADU Planning in Orange County](https://avorino.com/blog/3d-renderings-adu-planning-orange-county): 3D renderings let Orange County homeowners see an ADU before it is built, and shape layout, materials and finishes while changes are still cheap.
- [ADU Construction in Orange County: What You Need to Know](https://avorino.com/blog/adu-construction-orange-county-guide): How ADU construction actually runs in Orange County: design, engineering, city plan check, and the build, with one accountable team end to end.
- [Building Permits in Orange County, CA: The Process](https://avorino.com/blog/building-permit-process-orange-county-ca): How building permits work in Orange County: what plan check reviews, typical timelines by city, and the submittal mistakes that cost weeks.
- [How to Choose a Construction Company in Orange County](https://avorino.com/blog/choose-right-construction-company-orange-county): Licenses, contracts, warranties, and the questions that expose a weak builder: how to vet a construction company in Orange County.
- [Construction Project Planning in Orange County, CA](https://avorino.com/blog/construction-planning-orange-county-ca): Good construction planning decides your budget before ground breaks: scope, selections, permits, and scheduling, in the right order.

## Company

- [About](https://avorino.com/about)
- [Portfolio](https://avorino.com/portfolio)
- [Client Reviews](https://avorino.com/clientreviews)
- [Financing](https://avorino.com/financing)
- [Blog](https://avorino.com/blog)
- [Contact](https://avorino.com/contact)
- [Free estimate](https://avorino.com/free-estimate): send a project and get a realistic Orange County range back
- [Schedule a meeting](https://avorino.com/schedule-a-meeting): a 45-minute discovery call on scope, timeline and budget