Service · ADUs & Conversions
An ADU adds living space, rental income, or room for family without buying more land. We draft detached ADUs, garage conversions, and JADUs into complete, permit-ready plan sets - with stamped structural engineering and Title 24 included.
What we do
Whether you're building a new unit in the backyard or converting a garage you already have, every ADU starts with a complete, permit-ready set of plans. You bring the project; we handle the drawing side - full architectural plans, structural engineering, and Title 24 - packaged and ready to submit to your city or county.
We work with homeowners adding rental income, families creating space for relatives, and builders who need clean, dependable sets that clear plan check the first time. You get a flat fee quoted up front, revisions included, and a finished set in about two to four weeks.
Every kind of unit
A standalone unit in your backyard - the most flexible option for rental income or multigenerational living.
Turn an existing garage into a legal, livable unit - often the fastest and most affordable path to an ADU.
Up to 500 sq ft carved out of your existing home - a budget-friendly way to add a rentable unit.
A new unit built onto your existing house - added square footage that shares a wall but lives independently.
What's in your set
Your ADU plans come complete and submittal-ready:
The rules, in plain terms
California has steadily made ADUs easier to build. In most cases a complete application is approved ministerially - by-right, without a public hearing. The general framework:
*ADU laws change frequently and every city applies its own development standards (setbacks, height, lot coverage). Confirming what your property allows is the owner's or contractor's call - our job is turning your project into precise, permit-ready drawings.
From idea to permit
We talk through your goals, lot, and budget - and what your property can support.
We measure existing conditions and start your custom ADU or conversion plans.
Full plans with structural and Title 24, revised until everything is right.
You receive the complete, stamped set, ready to submit. Permit handling is an optional add-on.
Why Michael's Drafting
One quote up front before any work begins - you always know what's included.
Licensed-engineer wet stamps and energy reports built into the set.
Deep familiarity with building departments across San Bernardino, Riverside & LA counties.
ADU plans by city
We design ADUs and garage conversions throughout the Inland Empire and beyond. Choose your city for local permit details:
Don't see your city? Reach out - we serve communities across San Bernardino, Riverside & Los Angeles counties.
ADU FAQ
An ADU is a full secondary home - detached, attached, or converted - with its own kitchen and bath. A JADU (junior ADU) is up to 500 sq ft created within the walls of your existing home and may share some facilities. We design both.
Every ADU project gets a flat fee, quoted up front before any work begins - so you know exactly what your plan set will cost.
Most ADU and garage-conversion sets are completed in about 2-4 weeks, depending on size and complexity. Structural engineering and Title 24, if your project needs them, are done by consultants after your approval and add time beyond that.
Yes - garage-to-ADU and JADU conversions are among the most common projects we draw. We design within your existing footprint and prepare a permit-ready set for your city or county.
When your project needs them, we coordinate stamped structural engineering and a Title 24 energy report so your set is complete for plan check. Those consultant items are billed separately from the drafting fee, so you only pay for what your project requires.
Permit handling is an optional premium add-on. Your package comes permit-ready to submit yourself - or we can submit to your local building department and manage plan-check corrections for you.
Related services
Get started
Tell us about your property and we'll get back to you with next steps - and a flat-fee quote before any work begins.
Or reach us directly at info@michaelsdrafting.com or 909-486-3789.