ADU Permit Drawings
An ADU permit is three reviews in one: zoning confirms size and setbacks, building code checks construction and fire separation, and utilities confirm water, sewer and power capacity. Most ADU delays come from a mismatch between those three, so we coordinate all of them in one drawing set.
We draw detached backyard cottages, garage conversions, junior ADUs and attached units, following state ADU rules where they apply and your city's local standards.
- 3–7 days depending on ADU type
- 98% first-time approval
- PE stamp in all 50 states
What's in your drawing set
- Site plan with setbacks, lot coverage and separation from the main house
- Floor plan, elevations and building sections
- Fire-rated separation details where walls are shared
- Egress windows and ceiling-height compliance
- Foundation and framing plans, stamped where required
- Electrical, plumbing and mechanical layouts
- Utility connection and meter notes
- Energy compliance documentation (Title 24 / IECC)
ADU types we draw
- Detached backyard ADUs
- Garage conversions
- Junior ADUs inside the existing home
- Attached ADUs and additions
- Units above a garage
How it works
- 01
Send your project details
Address, a sketch or photos, and what you want to build. We confirm your city's requirements before drawing.
- 02
We draw and code-check
Your set is drafted to your jurisdiction's adopted code and checked the way a plan reviewer would check it.
- 03
You submit, we support
You get a permit-ready set, and we respond to any plan-check comments until it's approved.
Drawings delivered in 3–7 days depending on ADU type. City review time after submission depends on your jurisdiction.
Frequently asked questions
How long does ADU approval take?
Our drawings are ready in 3–7 days. City review depends on the jurisdiction. Some states set deadlines: California, for example, requires cities to act on a complete ADU application within 60 days.
Can my garage be converted into an ADU?
Usually, yes. It typically needs a raised or insulated floor, egress windows, fire separation and utility upgrades. We assess the existing structure and draw what's needed.
Do ADU plans need an engineer?
New detached ADUs and any structural changes generally need engineered framing and foundation design. Interior conversions sometimes don't. We include stamped structural work wherever it's required.
Will you check my zoning first?
Yes. We confirm the ADU size, height, setback and parking rules for your lot before drawing, so the design fits what your city will allow.
Already have drawings that just need a seal? See our PE stamp & seal review.
Guides for this project
- Residential Permits & AdditionsAccessory Dwelling Unit (ADU) Permitting: Simplifying the Approval ProcessRead guide
- Residential Permits & AdditionsGarage Conversions and Workshop Permits: Code Compliance EssentialsRead guide
- Building Codes & RegulationsUnderstanding Zoning Laws and Property Setbacks Before Submitting Permit DrawingsRead guide
Get your adu drawings started today
Permit-ready drawings in 3–7 days depending on ADU type, checked against your city's code.