What Is a Permit-Ready ADU Plan and How Does It Speed Up ADU Permits? 2025

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Categories: Architecture

Quick Answer: A permit-ready ADU plan is a pre-approved or pre-designed ADU floor plan that has been reviewed and approved by a local building department in advance. These “pre-approved” or “standard plan” programs reduce ADU permit review time from 3–6 months to 2–8 weeks in participating cities. California Senate Bill 9 (2021) and local ADU ordinances have pushed many Bay Area cities to create permit-ready programs. Cities with active permit-ready ADU programs include Los Angeles, San Jose, Santa Cruz, and Fresno, among others.

How Permit-Ready ADU Plans Work in California

Helpful Resources:

Pre-approved design library: The city (or a program like California’s CalHFA pre-approved plan program) approves a catalog of ADU designs in advance. Homeowners choose a design from the catalog.
Faster review: Because the structural, energy, and architectural plans are already approved, the city only needs to review site-specific items (setbacks, utilities, grading) — reducing review from months to weeks.
Fixed scope: Permit-ready plans have fixed footprints and features. Customization is limited — you choose the plan, select interior finishes, and provide site information. Significant layout changes require custom plan-check.
Cost savings: Pre-approved plans typically cost less than custom architectural plans ($500–$2,500 for a plan set vs. $8,000–$20,000 for custom architecture).

Bay Area Cities with Permit-Ready ADU Programs

City	Program Name	Review Time Estimate
San Jose	Standard Plan Program (ADU)	4–8 weeks (vs. 3–5 months custom)
Santa Cruz	Ready to Build ADU Plans	2–6 weeks
Stockton	ADU Standard Plans	2–4 weeks
Los Angeles	Pre-Approved ADU Plan Library	4–8 weeks
CalHFA (statewide)	ADU Grant + Pre-Approved Plans	Varies by city reviewer

Does San Jose have a permit-ready ADU plan program? Yes — San Jose offers a Standard Plan Program for ADUs that allows builders and homeowners to use pre-reviewed standard plans, reducing permit review time. Contact San Jose’s Department of Planning, Building, and Code Enforcement for the current list of approved standard ADU plans. The program has expanded significantly since 2021 as the city works to meet California’s ADU production goals.

Can I customize a permit-ready ADU plan in California? Minor customizations (interior finishes, cabinet layout, fixture selections) are generally allowed without triggering full plan re-review. Major changes — moving exterior walls, changing roof pitch, relocating kitchen or bathroom — typically require the plans to go through full custom plan check, losing the time savings. If you have specific layout needs, discuss them with your contractor before committing to a permit-ready plan.

Quartz Construction & Remodeling (CSLB #1003436) builds ADUs throughout San Jose and the Bay Area using both custom-designed plans and permit-ready programs. Call (650) 749-7436 for a free ADU feasibility consultation.

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 Trustindex verifies that the original source of the review is Google. We’re so happy with the work Hila and her team did on our home addition. The new space flows beautifully with the existing structure, and the quality is clear in every finish. Finished on schedule and stress-free.
  
 
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 Trustindex verifies that the original source of the review is Google. Working with Ohad on our full home remodel was an incredible experience. He helped us through every decision and made sure everything turned out exactly how we envisioned. The team was easy to communicate with and super detail-focused. We still can’t believe how beautiful our home looks!
  
 
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   Ajay Mukhopadhyay 
 
 
 
 Trustindex verifies that the original source of the review is Google. We recently worked with Quartz Construction (Owner: Ohad) for a construction project to remodel our Bathroom and we couldn’t be more pleased with the results. From start to finish, their team demonstrated professionalism, and exceptional craftsmanship. They maintained clear communication throughout the project, kept us informed of progress and any potential changes, and delivered everything on time and within budget. Their quality of work is outstanding — every detail was handled with care and precision. What stood out most was their commitment to customer satisfaction. They were responsive to our questions, respectful of our space, and ensured that the final outcome matched our vision perfectly. If you're looking for a reliable, skilled, and trustworthy construction contractor, I wholeheartedly recommend Quartz Construction ( Ohad and his team) .They exceeded our expectations in every way. Ajay
  
 
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   debbie curley 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had a fantastic experience working with Quartz Construction And Remodeling. Ohad Maloul the owner was professional communicative and a pleasure to work with from start to finish. His team repaired and painted my backyard pergola and the quality of their work was truly excellent. They were always on time, friendly and responsive to any questions I had throughout the process. I appreciated the clear communication and attention to detail. I’m excited to work with Ohad and his team on future projects and highly recommend them to anyone looking for reliable, high-quality construction or remodeling services.
  
 
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   Harry Lewis 
 
 
 
 Trustindex verifies that the original source of the review is Google. Hila managed our balcony addition project with care and precision. The design complements our home perfectly, and the build quality is outstanding. She communicated every step and made the whole process easy. We’re thrilled with the result!
  
 
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   Qi Lei 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had the chance to work with Ohad and his construction team on a recent home project, and I was really impressed. Ohad is professional, easy to communicate with, and genuinely cares about the quality of the work. The crew showed up on time, kept the work area clean, and finished the job on schedule. It’s hard to find contractors who are reliable and transparent these days, but Ohad delivered on everything he promised. Would definitely recommend if you’re looking for someone who takes pride in their work and keeps things straightforward.
  
 
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   Boris Tyron 
 
 
 
 Trustindex verifies that the original source of the review is Google. We’re so happy with the work Quartz Construction did on our backyard. Ohad’s team designed and built a gorgeous deck and patio that turned the area into a dream space. The quality and detail are fantastic. Highly recommend!
  
 
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   Gloria Collin 
 
 
 
 Trustindex verifies that the original source of the review is Google. Quartz Construction built the most beautiful pergola in our backyard, thanks to Ohad. He was easy to work with, listened to our needs, and delivered a structure that’s both stylish and durable. We now have a shaded space where we can relax and entertain guests.
  
 
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   Dustin Walsh 
 
 
 
 Trustindex verifies that the original source of the review is Google. They built a beautiful, durable pergola that fits our outdoor space perfectly. Hila paid close attention to both style and quality. We now have the perfect spot for lounging, gatherings, and enjoying every season.
  
 
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   Paul Wilins 
 
 
 
 Trustindex verifies that the original source of the review is Google. We feel incredibly lucky to have worked with Hila. She made the ADU process simple and stress-free, handling everything with care and professionalism. The final space is perfect—efficient, elegant, and exactly what we hoped for. Big thanks to her and the whole crew!
  
 
  
  
 
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