ADU Guides
Everything you need to plan an ADU — real costs, state rules, financing and the trade-offs between unit types.
How Much Does an ADU Cost in 2026? Real Numbers by Type and State
What an ADU actually costs in 2026 — by construction type (detached, garage conversion, JADU, prefab) and by region, plus the hidden soft costs people forget.
2026-06-14 · 7 min read
Garage to ADU Conversion Cost: What You'll Actually Pay
Converting a garage is the cheapest way to add an ADU. Here's what a garage-to-ADU conversion really costs in 2026, what drives the price up, and when it beats a detached build.
2026-06-14 · 6 min read
California ADU Rules in 2026: Size, Setbacks & Parking
A plain-English guide to California's statewide ADU law in 2026 — the 800 sq ft guarantee, 4 ft setbacks, the transit parking exemption and the 60-day approval rule.
2026-06-14 · 8 min read
ADU vs JADU: Which Backyard Unit Should You Build?
ADU vs JADU explained — the size limits, cost difference, owner-occupancy rules and rental potential of a junior ADU versus a full accessory dwelling unit.
2026-06-14 · 5 min read
How to Finance an ADU: 6 Ways to Pay for a Backyard Home
Six ways to finance an ADU in 2026 — HELOC, cash-out refinance, renovation loans, construction loans, ADU-specific loans and contractor financing — with the pros and cons of each.
2026-06-14 · 7 min read
Prefab ADU Cost: Is a Modular Backyard Home Actually Cheaper?
What a prefab or modular ADU costs in 2026, how it compares to a site-built unit, and the site-work and delivery costs people forget to budget for.
2026-06-14 · 6 min read
The ADU Permit Process: A Step-by-Step Guide for 2026
How the ADU permit process actually works in 2026 — from feasibility and design through plan check, approval and inspections — and how long each stage takes.
2026-06-14 · 7 min read
ADU Rental Income & ROI: Do Backyard Units Actually Pay Off?
How much rental income an ADU generates, how to estimate payback period and ROI, and the factors that make a backyard unit a strong or weak investment.
2026-06-14 · 6 min read
How Long Does It Take to Build an ADU?
A realistic ADU timeline for 2026 — from feasibility and design through permitting and construction — and how prefab and garage conversions can cut months off the schedule.
2026-06-14 · 5 min read
Washington ADU Law (HB 1337): What Homeowners Need to Know
Washington's HB 1337 (2023) requires cities to allow two ADUs per lot. Here's what the law guarantees on size, parking and owner-occupancy — and what it means for your build.
2026-06-14 · 6 min read
Academy
ADU Cost Calculator: How to Get a Realistic Estimate in 2026
How an ADU cost calculator works, which inputs move the estimate most, and how to test its range against real builder quotes before you commit.
2026-10-08 · 7 min read
Washington State ADU Rules: What Homeowners Can Build in 2026
Washington's 2023 ADU law (HB 1337) requires cities statewide to allow ADUs on single-family lots. Here's what the law mandates and what you can actually build.
2026-06-14 · 5 min read
Oregon ADU Laws: Statewide Rules That Override Local Restrictions
Oregon's SB 1051 (2017) and HB 2001 (2019) make it one of the most ADU-friendly states. Here's what you can build, how large it can be, and what cities can no longer restrict.
2026-06-14 · 5 min read
ADU Regulations in Texas: A City-by-City Breakdown
Texas has no statewide ADU legislation, so the rules depend entirely on your city. Here is the ADU landscape in Austin, Houston, Dallas, San Antonio and other Texas markets.
2026-06-14 · 5 min read
ADU Setback Requirements: How Close to the Property Line?
ADU setbacks determine how close to the property line your unit can sit. California mandates a maximum 4-foot setback for most ADUs. Here is how other states and cities compare.
2026-06-14 · 4 min read
ADU Size Limits by State: Maximum Square Footage Rules Explained
State ADU laws set a floor for maximum allowed ADU size. California allows up to 1,200 sq ft; Oregon up to 900 sq ft on smaller lots. Here are the rules by state.
2026-06-14 · 5 min read
Container Home ADU: Is a Shipping Container ADU Cheaper or Legal?
Shipping container ADUs look striking — but are they actually cheaper to build, and are they legal in your jurisdiction? An honest look at the trade-offs.
2026-06-14 · 5 min read
ADU Building Codes: Key Requirements for Safety and Permitting
ADUs must meet the same building codes as primary homes — electrical, plumbing, structural, fire and energy. Here are the key requirements to plan around.
2026-06-14 · 5 min read
ADU Rules in Florida: What Homeowners Need to Know in 2026
Florida has no statewide ADU mandate — rules are set by your city or county. Here's how Florida ADU zoning works and what to check before you build.
2026-06-14 · 5 min read
ADU Parking Requirements: Are You Required to Add a Parking Space?
California dropped ADU parking requirements near transit, and many states followed. Here's how ADU parking rules work and how they affect your project's feasibility.
2026-06-14 · 4 min read
ADU Impact Fees: What They Are and How to Reduce Them
Impact fees are one-time charges on new construction. California exempts most ADUs under 750 sq ft. Here's how impact fees work for ADUs and how to reduce them.
2026-06-14 · 5 min read
Building an ADU for Aging Parents: The Complete Planning Guide
An ADU lets aging parents live nearby while maintaining independence. This guide covers planning for accessibility, permitting, cost and financing a family ADU project.
2026-06-14 · 6 min read
ADU Zoning Laws: How Zoning Affects What You Can Build on Your Lot
ADU zoning rules control where, how large and how dense ADUs can be on a given parcel. Understanding your zoning designation is the first step in any ADU project.
2026-06-14 · 5 min read
What Is an ADU? Accessory Dwelling Units Explained
What is an ADU? A plain-English guide to accessory dwelling units: the types, the size limits, how they differ from a JADU, and what one actually costs.
2026-09-10 · 8 min read
Academy
500 Sq Ft ADU Cost: A Realistic 2026 Budget
Plan a 500 sq ft ADU budget with practical cost ranges, the line items people miss and a smarter way to compare builder quotes.
2026-10-05 · 8 min read
Academy
800 Sq Ft ADU Cost: Budgeting for a One-Bed Home
Understand what changes at 800 sq ft: layout choices, build routes, utility costs and the questions that make an ADU quote comparable.
2026-10-05 · 8 min read
Academy
ADU Cost Per Square Foot: How to Use the Number
Cost per square foot can help you compare ADU quotes, but only when the scope matches. Learn what it includes, misses and how to use it well.
2026-10-04 · 7 min read
Academy
Detached ADU Cost: The Budget Behind a New Build
A detached ADU offers privacy and flexibility, but the site work matters. Build a realistic budget and avoid the most common quote gaps.
2026-10-04 · 8 min read
Reviews
Accessory Dwelling Unit Plans: From Brief to Permit
Choose an ADU plan that fits your lot, life and local rules. Learn the drawings you need and the decisions to lock before permit submission.
2026-10-03 · 8 min read
Academy
ADU Floor Plans: Choose a Layout That Lives Well
Compare studio, one-bedroom and two-bedroom ADU floor-plan priorities. Make a compact home feel useful, private and ready for real life.
2026-10-03 · 7 min read
Academy
ADU Requirements Checklist: What to Check First
Use this ADU requirements checklist before you buy plans or choose a builder: zoning, setbacks, utilities, permits, code and project scope.
2026-10-02 · 8 min read
Academy
ADU Building Permit: A Practical Submission Guide
Prepare an ADU building-permit application with the documents, decisions and review questions that help a project move from plans to inspections.
2026-10-01 · 8 min read
Academy
ADU Construction Loans: How Draw Funding Works
Understand ADU construction loans, draw schedules, lender checks and the questions to settle before your builder starts work.
2026-10-01 · 8 min read
Academy
ADU ROI Calculator: Model Returns Before You Build
Use an ADU ROI calculator with realistic rent, vacancy, operating costs and finance. Learn the simple maths and the assumptions worth testing.
2026-09-30 · 8 min read
Academy
Fannie Mae ADU Requirements: What Borrowers Should Know
A plain-English guide to Fannie Mae ADU requirements, appraisals and rental-income rules. Use it to prepare questions for a lender, not as loan advice.
2026-09-30 · 8 min read
Academy
ADU Design Ideas That Make Small Homes Work Harder
Use practical ADU design ideas for light, storage, privacy, accessibility and energy performance without adding expensive, unnecessary complexity.
2026-09-30 · 7 min read
Academy
Mother-in-Law Suite Cost: Plan a Family ADU
Plan the cost of a mother-in-law suite or family ADU. Compare conversion and new-build routes, accessibility decisions and financing questions.
2026-09-30 · 8 min read
News
California ADU Law 2026: What the New Handbook Says
The California HCD ADU Handbook was updated in 2026. Learn how to use current state guidance alongside your city’s permit process.
2026-10-05 · 7 min read
Reviews
Prefab vs Site-Built ADU: An Honest Comparison
Compare prefab and site-built ADUs on cost scope, programme, design freedom, site access and risk. Pick the route that fits your lot.
2026-10-04 · 8 min read