ADU construction in Galt moves faster today than it did a year ago. A new state law gives your city only 15 business days to tell you whether your application is complete, and Galt publishes pre-approved plans that skip most of the design stage. So if a backyard unit has been sitting on your someday list, the timeline math has changed.

The slow part was never the building. It was the waiting.

Why ADU Approvals Move Faster in 2026

Approvals move faster because of Senate Bill 543, which took effect January 1, 2026. Your city now has 15 business days to review your ADU application and tell you in writing whether it is complete.

Here is how the clock works now:

• Within 15 business days, the city must send written notice saying your application is complete or listing exactly what is missing.
• If the city misses that deadline, your application is treated as complete automatically.
• Once complete, the city has 60 days to approve or deny it. Miss that, and the permit is deemed approved.
• Every resubmittal restarts a fresh 15-business-day window.

Before this, homeowners often waited months just to find out a single document was missing. Now delays surface early, which means your contractor can book crews and order materials with real confidence.

You are also far from alone in considering this. California issued roughly 41,000 ADU permits in 2025, about 52 for every 100 conventional residential permits, according to a Cotality analysis of national building permit data. If you are still deciding whether a backyard unit suits your property, our guide to what an accessory dwelling unit is walks through the basics first.

Galt's Pre-Approved ADU Plans: A Real Shortcut

Galt offers three standardized ADU plans that have already passed building review, so the only thing you supply is a site plan for your specific lot. That removes the slowest and most expensive step in a typical build.

You can view the plan sets and submittal checklist on the City of Galt's ADU page.

There is one important catch. These plans cannot be changed. Any modification pushes you into a full plan review with the fees that come with it. In exchange, state law requires cities to decide on pre-approved plan applications within 30 days, which is half the standard window.

Your ADU builder still prepares the site-specific drawings covering grading, utility hookups, and setbacks. But starting from a vetted template means concrete and framing can begin weeks earlier than a custom design allows.

What Happens on Your Lot, Step by Step

Once your permit clears, the build follows a predictable order. Knowing it helps you plan around the noise and the dust.

1. Site Prep and Grading: Crews clear the footprint, solve drainage, and level the pad. Thorough site preparation prevents settling later, which matters on older Galt lots with uneven soil.
2. Foundation and Concrete: A properly poured slab or footing carries everything above it.
3. Framing: Walls, roof structure, and rough openings go up, and your unit finally looks like a building. Good framing in Galt keeps every later trade on schedule.
4. Insulation and Energy Compliance: This is where the updated energy code gets inspected.
5. Interior Finishes: Drywall, cabinets, tile, and trim bring the space to move-in condition.

Title 24 Energy Rules Now Apply to Your ADU

Yes, the new energy code covers accessory dwelling units. The 2025 California Energy Code, Title 24 Part 6, took effect January 1, 2026 and applies to any permit filed on or after that date.

For your project, the practical change is the building envelope. Prescriptive standards now lean on high-performance insulation to cut thermal bridging, which often means pairing cavity insulation with a continuous layer. Many builders handle this with spray foam insulation in Galt, though loose-fill and continuous fiberglass both work when specified correctly.

Your permit package must include a compliance form showing your materials hit the new R-value targets. Assuming older methods still qualify is one of the quickest ways to stall at the counter. A contractor who builds compliance into the drawings on day one saves you from tearing out work after framing.

What to Ask Before You Hire

Ask how the trades are sequenced, because an ADU is a small building where every handoff costs time. Units under 1,000 square feet lose weeks whenever a separate sub has to be scheduled in and out.

Bring these five questions to any walkthrough:

• Which trades do you self-perform, and which get subbed out?
• Have you submitted under Galt's pre-approved plan program before?
• Who prepares and signs the Title 24 compliance documents?
• Will you walk the lot and check grading and utilities before we file?
• What happens to the schedule if the city returns a correction list?

The answers tell you more than a portfolio does. A general contractor serving Galt who has run this process locally can flag a drainage or setback problem before your application reaches the counter, which is where most of the savings actually live.

One seasonal note. Fall here stays mild and dry, so it suits foundation pours and framing. Filing now generally keeps the outdoor work ahead of winter rain.

FAQs About ADU Construction

Start Your Galt ADU Project

Ready to see what fits in your backyard? Learn more about ADU design and construction with TDK Construction, or call (209) 210-7434 and we will walk your lot, review the plan options, and map a timeline around the new approval windows.