Structural Concrete

Built on Careful Preparation From the Ground Up

We construct and coordinate residential foundations, footings, and concrete slabs with close attention to site conditions, approved plans, reinforcement, drainage, moisture control, and the structural needs of the project.

What We Do

Expert Foundations & Slabs Work

New foundations, structural slabs, footings, slab replacement, and repair coordination completed with careful excavation, subgrade preparation, reinforcement, moisture planning, placement, and curing.

  • Slab foundations for ADUs, additions, garages, and detached structures
  • Continuous and isolated footings based on approved structural plans
  • Structural slabs, equipment pads, and project-specific concrete bases
  • Excavation, forming, subgrade preparation, and compaction coordination
  • Rebar, anchors, embeds, and reinforcement installed to plan
  • Vapor-barrier and moisture-control preparation where specified
  • Slab removal, replacement, and repair evaluation
  • Placement, finishing, joint planning, curing, and inspection coordination
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Why Choose Us

What Happens Below the Surface Matters

A durable slab or foundation depends on much more than the concrete visible at the end. We coordinate excavation, elevations, subgrade conditions, forming, reinforcement, moisture protection, placement, joints, and curing around the approved plans so the completed work is prepared to support the structure above it.

  • Construction aligned with approved architectural and structural requirements
  • Careful attention to subgrade preparation, elevations, forms, and reinforcement
  • Coordination of anchors, sleeves, embeds, utilities, and inspection milestones
  • Moisture, drainage, jointing, and curing considered before placement begins
  • Clear communication from site preparation through final cleanup
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Altadena General Contractors team on a project site

Altadena General Contractors Process

Our step-by-step journey from consultation to optional care

1

Consultation & Planning

  • Get In Touch - Reach out by phone, email, or form to schedule your free consultation.
  • On-Site Assessment - We review your property, goals, and project requirements in detail.
  • Custom Plan & Quote - We provide a tailored scope with clear, transparent pricing.
2

Design & Approval

  • Concept Development - We create a practical solution that balances style, function, and long-term performance.
  • Selections & Specifications - We finalize materials, finishes, and key project details.
  • Final Approval - We refine the plan with your feedback before work begins.
3

Installation & Construction

  • Project Kickoff - Our licensed team prepares the site and sets a clean, organized workflow.
  • Expert Execution - We complete the approved scope with quality craftsmanship and dependable communication.
  • Quality Control - We perform checks throughout the job and make adjustments as needed.
4

Final Walkthrough & Completion

  • Client Walkthrough - We review the completed work with you to confirm every detail meets expectations.
  • Final Touches - We address punch-list items and ensure the project is clean and complete.
  • Care Guidance - We share practical maintenance tips to protect your investment.

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Transform your property with dependable construction solutions.

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Other Services We Offer

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Architectural Design & Engineering

Planning, architectural design, engineering coordination, and permit support for additions, ADUs, remodels, rebuilds, and other residential construction projects.

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Grading & Demolition

Selective demolition, site clearing, excavation support, rough and finish grading, and debris removal handled with a controlled process that prepares the property for the next phase of work.

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Concrete & Masonry

Residential concrete and masonry services for driveways, patios, walkways, retaining walls, foundations, slabs, and decorative flatwork, with careful preparation and clean finishing.

Learn about Concrete & Masonry

Service FAQs

Common Questions About Foundations & Slabs

What types of foundations and slabs do you build?

We support residential projects such as slab-on-grade foundations, footings, garage slabs, ADU and addition foundations, detached-structure slabs, equipment pads, and other structural concrete scopes shown in approved plans.

Can you pour a foundation for an ADU, addition, or garage?

Yes. We can coordinate excavation, forming, reinforcement, required embeds, concrete placement, and related inspections for ADUs, additions, garages, and other permitted residential structures.

Do foundations and structural slabs require engineered plans?

Many structural foundation projects require approved plans and details prepared by the appropriate design professional. Requirements depend on the structure, loads, site conditions, jurisdiction, and scope. We build from the approved documents and coordinate questions or field conditions before proceeding.

What preparation happens before concrete is poured?

Preparation may include demolition, excavation, confirming elevations, preparing and compacting the subgrade or base, setting forms, installing reinforcement, coordinating utilities and sleeves, placing a vapor barrier where required, and completing pre-pour inspections.

Why are subgrade preparation and compaction important?

The soil and base beneath a slab influence how evenly it is supported. Soft areas, inconsistent moisture, or poorly prepared fill can contribute to movement and settlement. The required preparation depends on the plans, site conditions, and any soils recommendations.

Do you install rebar and other reinforcement?

Yes. Reinforcement, dowels, anchors, hold-downs, and embeds can be installed as required by the approved structural plans. The exact size, spacing, and placement are determined by the project documents rather than a one-size-fits-all approach.

What is a vapor barrier and when is one needed?

A vapor barrier is a moisture-resistant membrane installed below certain interior slabs to help limit moisture vapor from moving through the concrete and affecting flooring or interior finishes. Whether one is required depends on the slab use, plans, code requirements, and finish system.

How do you reduce the risk of slab cracking?

Concrete can develop cracks as it shrinks and responds to loads, soil movement, temperature, and moisture. Proper preparation, reinforcement where specified, suitable concrete placement, planned joints, and curing help manage those forces, but no responsible contractor should promise that concrete will never crack.

Do you repair or level existing slabs and foundations?

We can inspect visible conditions and help determine whether localized repair, replacement, leveling by a specialty provider, drainage correction, or structural evaluation is the appropriate next step. Significant settlement or structural movement may require an engineer or foundation specialist before a repair scope is selected.

Can you replace a damaged or poorly performing slab?

Yes. When repair is not practical, the scope may include demolition, haul-away, correcting the underlying preparation or drainage issue where possible, rebuilding the forms and reinforcement, and placing a replacement slab.

How long before a new slab can be built on or used?

Concrete begins hardening soon after placement but continues gaining strength as it cures. Access, loading, framing, flooring, and other follow-on work must be scheduled around the concrete mix, weather, structural requirements, and direction from the project team.

Do foundation and slab projects require permits and inspections?

Structural foundations and slabs commonly require permits and inspections. The sequence may include excavation, forms, reinforcement, underground utilities, vapor barrier, and other pre-pour checks before concrete placement. Exact requirements are determined by the local jurisdiction and approved plans.

Can you coordinate the foundation with plumbing and utilities?

Yes. Before placement, we coordinate required sleeves, penetrations, drains, plumbing locations, electrical or grounding items, anchors, and other embedded components shown on the plans so they are accounted for before the concrete is poured.

How long does a foundation or slab project take?

Timing depends on plan approval, demolition, excavation, soil and access conditions, inspection scheduling, reinforcement complexity, concrete availability, weather, and curing requirements. A project-specific schedule can be provided after the site and approved scope are reviewed.