Amador County ADU Guidebook - A Complete Guide to Building an Accessory Dwelling Unit - Getting Started

Oct 29, 2026

Amador County ADU Guidebook provides a step-by-step process for residents to build an accessory dwelling unit (ADU), covering the full workflow from ADU 101 through move-in. It explains key concepts such as ADUs and alternative options like JADUs, outlines what the project must include (kitchen, bathroom, sleeping area), and supports planning with linked tools, exercises, worksheets, and references. The guidebook also identifies where rules apply (unincorporated county vs. cities) and lists department contacts for planning and building.

LanguageEnglish

CategoryLifestyle

FormatPDF

Pages83

Reading Time2 h 8 min

AccessFree to download

Getting Started

Introduction (ADU 101)

Process at a Glance

Learning the Rules

Property Details Worksheet

Staff Meeting Worksheet

Budgeting & Finance

Budgeting Exercise

Design

Initial Design Exercise

Design Ideas Exercise

Designer Considerations Exercise

Permitting

Staff Meeting Worksheet

Construction

Bonus: Move-in & Renting Your ADU

Frequently Asked Questions

AMADOR COUNTY ADU Guidebook [motherlodeadu.org](motherlodeadu.org) A COMPLETE GUIDE TO BUILDING AN ACCESSORY DWELLING UNIT GETTING STARTED |
LEARNING THE RULES |
BUDGETING |
DESIGN |
PERMITTING |
CONSTRUCTION | | --- | --- | --- | --- | --- | MOVE-IN WELCOME TO MOTHER LODE ADU Amador County This guide was created as a resource to help residents of Amador County through the entire process of building an accessory dwelling unit (ADU)—also known as granny flats, backyard cottages, in-law units, or basement/garage apartments. These pages include a step-by-step approach to your ADU project (from ADU 101 all the way to move-in) and provide links to helpful resources and tools along the way. Mother Lode ADU Online Our ADU website includes this Guidebook and the exercise worksheets that go along with it, plus a variety of other tools and resources to guide you through the ADU process. This includes an ADU Plans Gallery where you can compare and select pre-existing plans, saving both time and money. GUIDEBOOK & EXERCISES [motherlodeadu.org/guidebook](motherlodeadu.org/guidebook) COUNTY ADU [RULES](RULES motherlodeadu.org/rules)[ ](RULES motherlodeadu.org/rules)[motherlodeadu.org/rules](RULES motherlodeadu.org/rules)[ ](RULES motherlodeadu.org/rules)[ADU CALCULATOR](ADU CALCULATOR motherlodeadu.org/calculator)[ ](ADU CALCULATOR motherlodeadu.org/calculator)[motherlodeadu.org/calculator](ADU CALCULATOR motherlodeadu.org/calculator)[ ](ADU CALCULATOR motherlodeadu.org/calculator)[PLANS GALLERY](PLANS GALLERY motherlodeadu.org/plans)[ ](PLANS GALLERY motherlodeadu.org/plans)[motherlodeadu.org/plans](PLANS GALLERY motherlodeadu.org/plans)[ ](PLANS GALLERY motherlodeadu.org/plans)[ADU GLOSSARY](ADU GLOSSARY motherlodeadu.org/glossary)[ ](ADU GLOSSARY motherlodeadu.org/glossary)[motherlodeadu.org/glossary](ADU GLOSSARY motherlodeadu.org/glossary)[ ](ADU GLOSSARY motherlodeadu.org/glossary)[CAN I BUILD TOOL](CAN I BUILD TOOL motherlodeadu.org/can-i-build)[ ](CAN I BUILD TOOL motherlodeadu.org/can-i-build)[motherlodeadu.org/can-i-build](CAN I BUILD TOOL motherlodeadu.org/can-i-build)[ ](CAN I BUILD TOOL motherlodeadu.org/can-i-build)and much more! SEE ALL URLS in the Directory (final pages) . Amador County Planning Department 810 Court Street, Jackson Mon-Fri 8:00am – 5:00pm Planning and Zoning Info: 209-223-6380 planning@amadorgov.org Amador County Building Department 810 Court Street, Jackson Mon-Fri 8:00am – 4:30pm Building and Permitting Info: 209-223-6422 building@amadorgov.org MORE CONTACT INFO IN THE DIRECTORY, FINAL PAGES © Copyright 2023 Community Planning Collaborative All rights reserved. Version 1.0, September 2023 COVER PHOTO: RICHARD ADU STORY, PAGE 44 2 Table of Contents Content & Features 1 Getting Started 9 | 2 Learning the Rules | 17 | | --- | --- | | 3 Budgeting & Finance | 27 | | 4 Design | 33 | | 5 Permitting | 47 | | 6 Construction | 57 | BONUS Move-in & Renting Your ADU 63 INTRODUCTION ADU 101 4 PROCESS AT-A-GLANCE 8 REFERENCES GLOSSARY 80 DIRECTORY 81 URL DIRECTORY 82 PHOTO SOURCES 83 EXERCISES 68 This guidebook includes exercises to help you plan your ADU project. See the final pages of this Guidebook or download a separate PDF using the QR code. GETTING STARTED ¨ Identifying Goals & Concerns ¨ Recording Your ADU Goals ¨ Making a Rough Property Sketch LEARNING THE RULES ¨ Property Details Worksheet ¨ Staff Meeting Worksheet BUDGETING & FINANCE ¨ Budgeting Exercise DESIGN ¨ Initial Design Exercise ¨ Design Ideas Exercise ¨ Designer Considerations Exercise PERMITTING ¨ Staff Meeting Worksheet MOVE-IN ¨ What You Want in a Lease ~~ ~~ ADU STORIES Frequently Asked Questions How long does it take? 7 How do I get started? 10 Am I allowed to build an ADU? 21 What will it cost? 28 How will it affect my taxes? 32 How do I find an architect/designer? 41 How do I find a co

FAQs

How long does it take to build an ADU?

The guidebook includes a Frequently Asked Questions section with timing questions, such as “How long does it take?”

How do I get started with an ADU project in Amador County?

Begin with the guide’s step-by-step approach, starting from “ADU 101,” and use the listed exercises and worksheets to plan the project.

Am I allowed to build an ADU?

The guidebook’s FAQ section addresses eligibility, and it also clarifies that Learning the Rules and Permitting focus on unincorporated county areas while cities have separate local rules.

Oct 29, 2026

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