ADU Design & Permitting in San Mateo, CA
Complete design and permit management — plans, plan check, and approvals.
About Our ADU Design & Permitting Service
Design and permitting is where most ADU projects stall. Our in-house design and permit service produces the full construction drawing set — floor plans, elevations, structural, and Title 24 energy calcs — and manages the entire submittal to the City of San Mateo or San Mateo County. We know local setback, height, and fire-separation rules and design for California's ministerial (by-right) ADU approval, which requires cities to approve compliant applications within 60 days. Whether you plan to build with us or hand the permitted plans to another contractor, we get you an approved, shovel-ready ADU permit.
What's Included
Our Process
Consultation
We review your goals, budget, and lot to define the right ADU type, size, and layout.
Design Development
We produce floor plans and elevations for your approval, refining the layout to fit your needs and budget.
Construction Documents
We complete structural, electrical, plumbing, and energy documents required for a full permit set.
Permit Submittal
We submit to the jurisdiction, respond to every plan-check comment, and deliver your approved permit.
Why ADU Design & Permitting Matters
- Avoids costly plan-check delays
- Designed for by-right approval
- Shovel-ready permitted plans
- Local knowledge of San Mateo rules
- Design fee credited toward the build
Frequently Asked Questions
How long does ADU permitting take in San Mateo?
Can I use your plans with another builder?
What is ministerial ADU approval?
ADU Design & Permitting Service Areas
We provide adu design & permitting across San Mateo and the Peninsula, including:
Get a Free Quote
Free on-site estimate
Starting at
$6,500
Design and permit package, credited toward construction if we build.
Duration
6 - 12 weeks
Warranty
Approval-backed plan set
Other Services
Why Choose Us
- Licensed & Insured
- Satisfaction Guaranteed
- Free Estimates
- San Mateo Local
- Design-Permit-Build
- 1-Year Workmanship Warranty