Foundations & Excavation in Maricopa County
Engineered footings, stem walls and site prep for new commercial and residential construction.
Foundations are where every dollar of finish work either holds — or fails. EL Construction excavates, forms, ties rebar, and pours engineered footings, stem walls, and grade beams sized for Phoenix-area soils: caliche near the foothills, expansive clay in east Tempe and Mesa, alluvial fill across the central basin, and decomposed granite in Scottsdale and Paradise Valley.
Common problems
- ✗One-size-fits-all footings on soils that move with seasonal moisture
- ✗Excavation crews that don't coordinate with the concrete sub
- ✗Rebar schedules that don't match what the engineer drew
- ✗Surprise change orders when caliche or rock shows up
How EL Construction solves them
- ✓Geotech-aware footing depth and rebar grade per site
- ✓Single contract for excavation, formwork, rebar and pour
- ✓Inspector meets us with rebar exposed — no second trips
- ✓Caliche / rock contingency priced upfront, not as a surprise
From quote to warranty
- 1
Site Visit & Soils Review
We walk the site, check elevations, and review any geotech report on file.
- 2
Excavation & Formwork
Trenching, forming, and grade beams set to the engineered drawing.
- 3
Rebar Tie-In
#4 / #5 rebar tied to schedule with proper chair height and lap length.
- 4
Pour & Inspection
Pour with vibration, finish, and stand-by for the inspection callout.
- 5
Backfill & Handoff
Cleanup, backfill, and ready-for-frame walkthrough.
What it typically costs
Itemized written quote in 1–3 business days from your site visit.
| Item | Range |
|---|---|
Residential foundation excavation Footing trench plus haul-off. | $8 – $18 / linear ft |
Commercial spread footings | Quoted per engineered drawing |
Stem wall + grade beam package Typical 1,800 sq ft slab footprint. | from $14,000 |
Quick answers
How much does a foundation cost in Arizona?
Residential foundation excavation in Maricopa County typically runs $8 to $18 per linear foot for the footing trench, plus the pour. A complete stem wall and grade beam package for a typical 1,800 square foot home starts around $14,000 — soils, rebar, and engineering drive the final number.
How long does a foundation take?
Most residential foundations from excavation to ready-for-frame take 7 to 14 working days. Commercial spread footings depend on inspections and engineering complexity but usually run 2 to 4 weeks.
Foundations FAQ
How deep do foundations go in Maricopa County?+
Frost depth isn't a factor in the valley, but Maricopa County code requires footings to bear on undisturbed soil at minimum 12 inches below grade for residential. Commercial and structural footings are sized by engineer per soil bearing capacity — typically 18–36 inches.
Do you handle expansive soil?+
Yes. Expansive clay shows up in pockets across east Tempe, Mesa and parts of Chandler. We mitigate with deeper footings, post-tension slabs, moisture barriers, and engineered fill — all priced into the quote, not as a change order.
Can you remove caliche?+
Yes. We bring rock buckets, hammers, and saws as needed. We price caliche / rock contingency upfront so you know the worst-case before we dig.
Do you pour in monsoon season?+
We schedule around storm windows. July through September we pour early morning and protect with curing blankets and tarps. We won't pour into a forecast that risks washout.
Foundations across Maricopa County
Related services
Commercial Concrete
Slabs, pads, ADA ramps and site concrete for commercial builds across Maricopa County.
Flatwork & Driveways
Smooth-finish driveways, sidewalks, patios and warehouse floors poured to last through Arizona summers.
Concrete Demolition
Saw-cut, break-out and haul-off for slabs, footings, walls, and ADA cuts.
Ready for a foundations quote?
Same-week site visits across Maricopa County. Direct crews, written warranty, no surprise change orders.
Tempe HQ · Serving all Maricopa County · Licensed AZ ROC