An Accessory Dwelling Unit (ADU) is a secondary housing unit on a single-family residential lot. It can be detached, attached, or a conversion of existing space like a garage.

How much does it cost to build an ADU?

Costs vary by location and type, but generally range from $100,000 to $300,000+ depending on size, design complexity, and materials selected.

How long does it take to build an ADU?

Typically 6 to 12 months, including design, permitting, and construction phases. Our streamlined process helps minimize delays.

Do I need a permit to build an ADU?

Yes, all ADUs require building permits. California law has recently streamlined this process, and our team handles every permit application on your behalf.

Can I convert my garage into an ADU?

Absolutely. Garage conversions are one of the most popular and cost-effective ways to add an ADU, typically at a lower cost than new construction.

Will an ADU increase my property value?

Yes. Studies show that ADUs can significantly increase property value while also generating rental income — often enough to offset construction costs over time.

What types of ADUs can be built?

We build Detached ADUs, Attached ADUs, Junior ADUs (JADUs), and Garage Conversions — tailored to your lot size, budget, and goals.

Do you handle the entire ADU process?

Yes. We provide full-service solutions — from initial site evaluation and design through permitting, construction, and final handover.

What remodeling services do you offer?

Beyond ADUs, we specialize in kitchen and bathroom remodeling, home additions, and complete interior renovations throughout Southern California.

How can I get a quote for my ADU project?

Fill out our contact form or call us at (714) 927-9777 for a free, no-obligation consultation and quote.

ADU Costs & Financing - OcAduStudioOcAduStudio

Apr 24, 2026 9 min read

Before the First Nail: Budgeting for ADU Design & Permits

Before the First Nail: Budgeting for ADU Design & Permits A Complete Guide to Soft Costs for ADUs in California Get Your…

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Apr 13, 2026 15 min read

NEW Interest Rate Forecast 2026: Lock Now or Wait for ADU Loans?

A Complete Guide to the NEW Interest Rate Forecast 2026 for ADU Loans Fed outlook, HELOC predictions, fixed-rate forecasts, lock vs wait…

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Apr 10, 2026 15 min read

Grants & Subsidies: Free Money for California ADUs in 2026

Free Money? The 2026 Guide to California ADU Grants CalHFA grants up to $40k, city programs, energy rebates, and low-income subsidies Check…

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Apr 9, 2026 18 min read

Appraisal & Value Add: How Much Equity Does an ADU Create?

Instant Equity: How Much Value Does an ADU Really Add to Your House? The complete guide to ADU appraisal, rent multipliers, equity…

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Apr 8, 2026 16 min read

School Impact Fees: Why You Might Owe Thousands for Your ADU

A Complete Guide to School Impact Fees for ADUs in California The 750 sq ft rule, fee by district, exemption strategies, real…

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Apr 6, 2026 14 min read

Utility Connection Costs: Why the $10,000 Pipe Hits Your Budget

A Complete Guide to Utility Connection Costs for ADUs in California Sewer lateral, water meter, power meter, gas meter costs, trenching strategies,…

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Apr 6, 2026 14 min read

Construction Loans: Cash is King, But Loans are Queen for ADUs

A Complete Guide to Construction Loans for ADUs in California Construction-to-permanent, FHA 203(k), Fannie Mae Homestyle, credit union options, and qualification requirements…

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Apr 5, 2026 13 min read

ROI Analysis: Is an ADU the Million Dollar Investment of 2026?

A Complete ROI Analysis for Orange County ADUs Cash-on-cash returns, city-by-city rankings, tax benefits, payback periods, and 10-year projections Calculate Your ROI…

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Apr 5, 2026 14 min read

Property Tax Impact: Will the Taxman Cometh for Your ADU?

A Complete Guide to Property Tax Impact for ADUs in California Proposition 13 rules, city-by-city tax rates, tax deductibility, supplemental bills, and…

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