Placer County · California
Loomis ADU guide: local rules, permits & property planning
Loomis uses a Town residential-structure application with an ADU supplemental form. Its published intake instructions call for digital submission by email, so preparing the complete package matters before arranging payment.
Local planning guide · Reviewed October 2, 2026
What matters for an ADU in Loomis
Permitting authority: Town of Loomis — residential structure permits
Official local guidanceLocal rules and design checks
| Topic | Local guidance |
|---|---|
| ADU supplement | Include the Town’s ADU Supplemental Application with the residential structure materials. |
| Waste diversion | The Town’s list includes a Pre-Construction Diversion Plan. |
| Drawing set | Use the Town’s Submittal Requirements Worksheet to assemble a complete set of plans. |
Selected local requirements, not a complete zoning determination. Confirm the current rules for your address with the responsible agency.
Fees and budget checks
Loomis bases building-permit fees on building valuation. The Town asks applicants to contact Town Hall for the amount due before using its online payment system; do not submit an assumed flat fee.
Loomis building feesHow to start the permit process
Complete the residential checklist, ADU supplement and required plan set, then submit digitally to the Town’s listed building-permit email. Obtain the assessed fee amount before paying through the online system.
Municipal application resource
Loomis ADU supplemental application
The residential-structure page identifies the ADU supplement separately from ordinary remodel materials, providing a concrete package to prepare for Town review.
View the original sourceLoomis ADU questions
- Should I use Placer County’s permit application inside Loomis?
- Begin with the Town’s residential-structure process for a parcel within Town jurisdiction.
- Can I pay before the Town calculates my permit fee?
- The Town directs applicants to obtain the amount due from Town Hall before paying online.
Sources for this guide
- Town of Loomis — residential structure permits
- Loomis building fees
- Loomis building permit applications
Local sources reviewed October 2, 2026. Historical examples retain their stated dates. Contact ADU California to confirm project availability; this guide does not establish an office location or property approval.
A useful first review
Separate what is available from what still needs verification.
01
Confirm the property
Start with a complete address and review the available parcel, building, and map context.
02
Identify the unknowns
Keep missing setbacks, easements, utilities, access, hazards, and local requirements visible.
03
Choose the next review
Use the preliminary result to prepare a focused conversation with the required professionals and agencies.
Explore project types
Compare the scope before choosing a solution.
These pages explain the questions each project type introduces. They do not assert that a particular scope is permitted or suitable for your address.
Compare planning footprints
See common ADU sizes before choosing a design.
These model pages are planning references only. They are not a statement that a particular size is allowed or buildable at a Loomis address.
California directory
Explore more city guides.
The next useful action
Put your address at the center of the conversation.
The online review is preliminary and is not a permit decision, survey, engineering opinion, construction document, final price, or guaranteed schedule.