Berkeley Backyard Detached ADU
Berkeley, CA
- Project Type
- ADU Foundation
- Project Year
- 2026
- Structure
- Detached backyard ADU
- Finish
- Steel-troweled slab
New Edge Concrete built the foundation for this detached backyard ADU in Berkeley in 2026, working with general contractor GR Innovative Builders. It is a classic Berkeley infill lot — neighbors on three sides and the only way in is down the side of the existing house — so the footprint was excavated and the spoils moved out through that narrow side yard before any concrete work began. We set the perimeter forms, laid a compacted base and vapor barrier under a full two-way rebar mat, and worked the underslab plumbing and electrical stub-ups in with the GC ahead of the pour. The slab went in by pump in a single day and was steel-troweled flat, with a thickened perimeter, anchor bolts set wet, and a stepped bump-out and short stem wall at the back corner for the ADU’s utility wall.
General ContractorGR Innovative BuildersScope of work
- Tight-access backyard excavation
- Compacted base & vapor barrier
- Full two-way rebar mat
- Underslab plumbing & electrical coordination
- Formed slab with thickened perimeter
- Pumped pour & steel-trowel finish
The finished result
During the build
Excavation, forming, reinforcement, and the pour — the work behind the finish.