Lamorinda · Moraga nearby
ADU Builders in Lafayette, CA
Lafayette approves every ADU ministerially, without a public hearing, and has cut development impact fees for new ADUs by 50% through 2026 (City of Lafayette). It also participates in the SD7 ADU Accelerator, which offers up to $15,000 per ADU while funds last.
Lafayette rules
What's different in Lafayette as of October 2026
| Item | Lafayette | Source |
|---|---|---|
| Approval | All ADUs ministerial, no public hearing | City |
| Impact fees | Reduced 50% for new ADUs through 2026 | City |
| Rebate | SD7 ADU Accelerator, up to $15,000 | City SD7 page |
| Pre-approved plans | County PADU vendor plans; city plan library in development | County |
| Building permits | Contra Costa County building inspection | County |
| Sewer | Central San rules for attached vs detached ADUs | Central San |
Site realities
Hillsides, oaks and fire maps
Many Lafayette lots slope and carry mature oaks, so the buildable spot is often decided by grade, root zones and access rather than by setbacks. A rear-corner detached unit may need stepped footings and drainage; a garage conversion or attached unit can sidestep much of that.
Parts of Lafayette fall in mapped fire hazard areas (Lafayette fire hazard maps); those lots need Chapter 7A wildfire-resistant construction.
Moraga next door also uses County PADU plans and is listed in the SD7 program; the Town has been developing permit-ready prototypes.
FAQ
Lafayette ADU questions
Does Lafayette require a public hearing for an ADU?
How much are ADU impact fees in Lafayette?
Who issues building permits in Lafayette?
Next step
Plan your Lafayette ADU
Share your lot and goals. A local ADU builder can review feasibility and give you a quote.