— ADU builder in Modesto, CA
Build a backyard home on the Modesto lot you own.
Detached ADUs, garage conversions, attached units and junior ADUs for owners in Modesto, Ceres, Turlock, Riverbank and Oakdale. Plans, permits and construction under one contract. Licensed and insured.

How much does an ADU cost in Modesto?
No published survey prices Modesto ADUs alone as of October 2026. The nearest 2026 benchmark, Block Renovation's Sacramento guide, lists garage conversions at $80,000 to $150,000 and new detached units from $150,000 to beyond $300,000. Free regional plans cut design spending; site work and utilities still vary.
Build types
State law lets most single-family lots pair a converted unit, a new detached unit and a junior ADU, as of October 2026. Your yard and garage decide which of these make sense.
From address to move-in
- Lot checkZoning, setbacks, easements and which agency holds your parcel.
- VisitMeasurements, the electrical panel and the sewer path.
- Plan and permitA free regional plan or a custom set, filed and tracked.
- BuildConstruction, inspections and final approval.
Where we build
Modesto
The city rewrote its ADU code in late 2024 to match state law.Modesto notesCeres
Five named pre-drawn plans, from a 260 sq ft studio up.ADUs in CeresTurlock
A published shortcut list for owners who build a pre-drawn plan.ADUs in TurlockRiverbank
One of the original partners in the free regional plan set.ADUs in RiverbankOakdale
Also a founding partner, with state rules setting the baseline.ADUs in OakdaleFind out what your lot allows
Share the address and what you have in mind. We check the parcel and reply with the build types that fit.
Modesto, Ceres, Turlock, Riverbank and Oakdale.