Foundations, Footings & Retaining Walls

The structural concrete nobody sees and everything else depends on.

Footings and foundations are the part of a project where mistakes are permanent and expensive. Everything above them — framing, siding, cabinets, drywall — inherits whatever the concrete does over the next fifty years.

We form and pour footings, stem walls, monolithic slabs, garage and shop foundations, ADU and addition foundations, and short structural retaining walls. Work is built to the engineer’s drawings where one is involved, and staged so the inspector sees steel and forms before any truck arrives.

Footings & stem walls

Continuous and spread footings, formed to plan depth and width with the correct rebar schedule.

Garage & shop foundations

Monolithic or footing-and-stem foundations for detached structures, sized for the building above.

Addition & ADU foundations

New foundations tied into an existing house without compromising what is already there.

Short retaining walls

Poured structural walls with drainage behind them — the part most failed walls were missing.

Frost walls & thickened edges

Perimeter details that keep slabs from lifting in a cold snap.

Post & pier footings

Deck, pergola and carport footings with the right anchors cast in place.

Get a price on this

Free on-site measure, written itemized estimate, no pressure.

(360) 555-0142

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Hours: Mon–Fri 7:00 AM – 6:00 PM · Sat 8:00 AM – 2:00 PM

Excavation, steel and the inspection

We dig to undisturbed bearing soil — not to a convenient depth — and set forms true to the string line. Rebar is lapped, tied and chaired to the specified cover, with dowels where a wall keys into an existing structure. Anchor bolts, hold-downs and sleeves are placed before the pour, not drilled in afterwards.

On permitted work, the footing inspection happens with forms and steel in place. We book it, meet the inspector, and correct anything flagged the same day so the pour is not pushed a week.

Retaining walls that actually drain

Most retaining wall failures are drainage failures. Soil behind a wall holds water, water adds enormous hydrostatic pressure, and a wall designed for soil load alone leans or cracks. Every wall we build gets free-draining backfill, a perforated drain line at the base and an outlet to daylight.

There is also a height limit worth knowing: past roughly four feet of retained height, most local jurisdictions require an engineered design and a permit. We will tell you which side of that line your project falls on before you spend money on a plan you do not need — or skip one you do.

Working alongside your builder

We are comfortable as a concrete subcontractor on a larger project: we read plans, coordinate with framers and plumbers on sleeves and stub-ups, and hit the dates on the schedule so the trades behind us are not standing around.

For homeowners acting as their own general contractor, we will walk you through the sequence and tell you what needs to happen before we can pour.

What foundations & footings cost in Marysville

Real planning ranges for our market — not a national average.

Structural work is priced by the linear foot of wall or the square foot of footprint. Footings and stem walls typically run $45 to $90 per linear foot; engineering, permits and inspections are billed at cost.

WorkUnitTypical rangeWhat that includes
Continuous footing & stem wallper linear ft$45 – $90formed, rebar per plan
Monolithic slab, garage or shopper sq ft$12 – $20thickened edge, vapor barrier
Poured retaining wall, up to 4 ftper sq ft of face$55 – $110drain rock + drain line included
Post / pier footingeach$250 – $600with cast-in anchor
Excavation & spoils haul-offper cubic yard$60 – $140depends on access
Engineering & permit feesat costbilled as invoiced, no markup

Typical complete projects

Detached shop 24 × 30 ft

footing, stem wall & slab

$14,000 – $24,000

Addition footing, 40 linear ft

footing + stem wall

$2,800 – $4,500

Retaining wall 3 ft × 30 ft

poured, with drainage

$6,000 – $11,000

Ranges are for planning, not a quote. Your price depends on access, base condition, demolition, thickness and finish — we confirm it in writing after a site visit.

From this kind of job

Photos from our own projects around Snohomish County.

Questions we get about foundations & footings

Anything structural, anything on a slope, and most retaining walls over about four feet will need an engineered design and a permit. Simple shed or post footings usually do not. We will tell you which category you are in at the estimate.
Local frost depth typically puts residential footings at least 12 to 18 inches below finished grade, and often deeper depending on soil and the building department’s requirements. We dig to bearing soil and to the depth the plan or code calls for, whichever is deeper.
Rain during a pour is manageable; standing water in a footing trench is not. We pump out and re-check the base before concrete goes in, and reschedule when the ground will not hold.
We handle new foundation work, replacement sections and footing underpinning we can access. Structural leveling and pier systems are a specialty trade — if that is what your house needs, we will say so and point you to it.

Ready for a straight answer and a firm price?

Send a photo of the area and a rough size — we’ll come out, measure and give you a written estimate at no charge.