08/31/2026
7 weeks. 7 cities. One conclusion: Central Valley is one of the best regions in California to build an ADU.
Now β here's how you actually start:
Step 1: Assess your lot π
Most California single-family properties qualify. Key factors: lot size, setbacks, existing structures, and utility access.
Step 2: Choose your ADU type π
β’ Detached ADU β Standalone backyard structure (most value, most flexibility)
β’ Attached ADU β Addition connected to your main home
β’ Garage conversion β Often the most affordable path
β’ Junior ADU (JADU) β Up to 500 SF within your existing home
Step 3: Design and permit βοΈ
California requires permits for all ADUs. Most cities process in 30β60 days. A contractor who knows your local permit office saves you weeks.
Step 4: Build π¨
Average timeline: 4β8 months depending on size and complexity. Always use licensed, insured contractors.
Step 5: Earn or enjoy β
Rent it. House family. Increase your property value. Your ADU works for you.
At Merced County Builders, we handle the entire process β from design coordination and permits through construction and final inspection.
π Call or message us today to get started.
π Serving Los Banos Β· Merced Β· Atwater Β· Turlock Β· Modesto Β· Fresno and throughout Central Valley