DOHENYCONCRETE CONSTRUCTION, INC.
Finished ADU slab with framing going up behind
Recent jobADU foundation
StageAfter the pour
AreaLos Angeles

New construction

Foundations for new homes, ADUs and SB 9 projects

Building on your lot? We pour the footings, stem walls and slabs that everything else sits on, working from your architect's and engineer's plans and through each city inspection.

2007Licensed and building in Los Angeles
238Permitted projects on public record, from retrofits to ADUs
4.9★From 60+ reviews online
B + C-8One CSLB license: general building, C-8 concrete and public works

New home foundations

Footings, stem walls and slab-on-grade for new houses and rebuilds, with rebar placed and ready for the city's pre-pour inspection.

From a recent job · ADU foundation

Before the pour
Anchor bolts and hold-downs cast into the slab

What goes into a new slab foundation

A section through a slab-on-grade foundation. Tap a part in the key to highlight it.

Section drawing of a new slab-on-grade foundation: stud wall, pressure-treated sill plate, cast-in anchor bolt, concrete slab, vapor barrier over gravel, thickened perimeter footing and rebar. FINISH GRADE A B C D E F G INTERIOR EXTERIOR
Detail 2New slab-on-grade foundation
Ref.Per structural plans
ScaleNTS

Recent project

Two-story ADU, Mar Vista, 2025. A detached garage converted and expanded into a two-story accessory dwelling unit, built per engineering. City permit closed out after final inspection.

See the project photos →

ADU foundations

Slab or raised foundations for detached ADUs, garage conversions and additions. When a conversion needs it, we strengthen the existing structure too.

SB 9 lot splits and two-unit builds

SB 9 is a California law, in effect since 2022, that lets owners of most single-family lots split the lot in two or build a second home. Some lots are excluded, such as historic districts and very high fire hazard zones, so check your lot with LADBS or your city first. Once you have plans, we build the foundations for the new units, plus the new driveway approach from the street.

How we work with your team

  1. Send us your approved plans or the structural sheets, and we'll price the foundation.
  2. Still in design? We can walk the lot with you and your engineer.
  3. We excavate, set forms, tie rebar and place anchor bolts and hold-downs to the plans.
  4. The city inspects before the pour; then we pour and the framing can start.

Questions

Can you pour the foundation for my ADU or new house?

Yes. Send us your approved plans or the structural sheets and we'll price the footings, stem walls and slab.

What is SB 9, and does it apply to my lot?

SB 9 is a California law, in effect since 2022, that lets owners of most single-family lots split the lot into two or build two homes on it. Some lots are excluded, such as historic districts and very high fire hazard zones. Check your lot with LADBS or your city first.

Do you build the driveway approach too?

Yes. Public works is on our license, so we can build the new driveway approach from the street.

Related services

Not sure what your house needs? Start with an inspection.

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