Modular or stick-built? A practical California guide to the costs, timelines, permitting and site-access tradeoffs of each way to build an ADU.

SB 1117 changes how ADU impact fees and San Diego school fees are calculated, which could save homeowners thousands of dollars starting January 1, 2027.

AB 956 requires cities to approve two detached ADUs on qualifying single-family lots. What the new law allows, its limits, and what it means for your property.

For the right property, SB 9 can allow larger primary homes and even split one lot into two. Here's how it compares with building an ADU.

California AB 2533 created a clearer path to legalize ADUs and JADUs built without permits before 2020, with protections from penalties and certain fees.

There are so many misconceptions about the definition of a JADU

Here is a guide to help you plan your project.

A boundary and topographic survey is one of the highest-value steps in an ADU project. Here's how it saves time and money before design even begins.

Garage conversion, detached new construction or an addition to your house? The pros and cons of the three main ADU paths, and what should drive your decision.

Sewer capacity, water meters, easements, property lines and more: the ten issues that most often derail ADU projects, and how to avoid them.

What you should know and how to budget for Fire hazards.

Overhead power lines, gas lines and utility upgrades can delay or even stop an ADU project. Here are the main SDGE issues to plan for before you start.

California Accessory Dwelling Unit (ADU) Setback Rules