A foundation is the one piece of concrete on a property you never get to redo. We pour footings, stem walls and slabs for new homes, additions, garages and commercial buildings across Marietta, and we treat each one as structural work first. The forms are set to the plan. The reinforcement sits where the drawings put it, and the concrete goes in as one continuous pour wherever the design calls for it. The median home here was built in 1986, so a good share of our foundation work is additions that have to tie cleanly into a slab that has been in place for decades.
Most foundation trouble starts before the truck arrives. Cobb County is hilly, with 199 feet of local relief within a few miles, and the ground changes from one block to the next. The dominant soil is Gwinnett, which drains well, but it is not the same everywhere, so we test every site on its own before a single form goes down. Water matters too. The area sees about 59 inches of rain a year, and a footing that sits where runoff collects will show it eventually. We grade for that, we handle the permit, and we pour once.
What moves the number on a slab is mostly what sits under it. A 4-inch slab on a flat, well-drained pad is simple work. Cobb County has 199 feet of local relief within a few miles, so many lots need cut, fill and compacted gravel before any concrete arrives. Thickness, rebar or wire mesh, pump access and the finish all change the price. We walk the site, test it, and put each of those items in the estimate.
Most driveway failures start in the base, not the concrete. We remove the old surface, compact a gravel base, and set rebar on chairs so it sits mid-slab instead of lying in the dirt. Cars get a 4-inch pour; where a truck or trailer parks, we go thicker. Control joints are cut so cracks land where we put them. With about 59 inches of rain a year, every driveway is sloped to carry water away from the garage.
Garages, basements, workshops and commercial floor space all get the same groundwork: a compacted base, a poly vapor barrier, and reinforcement sized to the load. The finish depends on use. A steel-troweled floor suits a garage or shop, while polished, stained or sealed surfaces work for living space and the retail frontage around Marietta Square. Moisture is what ruins a floor covering, so we let the slab cure properly and test it before anything goes down.
Not every cracked slab needs tearing out. Hairline shrinkage cracks can be routed and sealed, and some settled sections can be lifted back to level. When a slab has broken into pieces, heaved, or lost its base to washout, patching only buys time, so we cut out the bad section and pour new. The median home here was built in 1986, which means many slabs we see have been down for decades. We check what is underneath before recommending either.
Before anything gets dug, we walk the lot, shoot grades and test the soil where the footings will sit. Cobb County is hilly, with 199 feet of relief within a few miles, and the ground changes from one block to the next. Gwinnett soil drains well and is the most common type here, but we never assume we have it. The test tells us how wide the footings run, where water will go, and whether the plan holds. Nothing gets ordered until it does.
Excavation goes down to undisturbed soil. Anything soft, organic or loosely filled comes out, since a footing is only as good as the ground under it. On a sloped lot we step the footings instead of piling fill on the low side. We compact the base in lifts, lay gravel under slab areas, and set a vapor barrier so ground moisture stays out of the concrete. With about 59 inches of rain a year, runoff gets a planned path before the forms go up.
Forms are set to string lines and checked for level and square, because every error here gets poured in permanently. Rebar runs continuous through the footings, lapped at splices and tied at corners, and sits on chairs or dobies so the concrete wraps it completely. Steel lying in the dirt rusts and does nothing. Vertical dowels tie footing to wall, and anchor bolts are placed for the sill plate. We handle the permit, and the steel is inspected before any truck is called.
One continuous pour is the goal, so we schedule trucks close together and have enough hands on site before the first chute swings. Stopping midway leaves a cold joint, a weak seam where fresh concrete meets concrete that has already set. We place the mix, then vibrate it to drive out air pockets and settle it around the steel. Water is not added at the truck to make it easier to spread. That weakens the concrete, and it is the most common shortcut we see.
Tops of footings and walls get struck off level so the framing sits true. Slabs are screeded, floated to bring cream to the surface, then troweled once the bleed water has gone. Troweling too early traps water under the top layer, and that surface flakes later. Garage floors get a broom finish for grip. Interior slabs are troweled smooth for flooring. Control joints are cut at planned spacing so the shrinkage cracks every slab gets run where we want them.
Concrete gains strength by hydrating, not by drying, so the days after the pour matter as much as the pour itself. We keep the surface wet, or covered with curing compound or blankets, so it does not lose moisture too fast. Hot, windy afternoons pull water out of the top and cause surface cracking. Heavy rain on a fresh slab washes out the finish, so we cover it. Framing loads wait until the concrete is ready to carry them.
Below grade, foundation walls get a damp-proofing coat on the outside before backfill, plus a drainage mat where the site calls for it. Footing drains go in at the base, wrapped in fabric and bedded in gravel, carrying water away from the house. On exposed slabs, a penetrating sealer goes on once the concrete has cured, which slows water and stains from working into the surface. Backfill goes in last, compacted in lifts and graded away from the walls.
Most foundations we pour in Marietta fall into one of three types. A monolithic slab places the footing and floor together in one pour, which suits garages, additions and level lots. A stem wall foundation sets poured walls on a continuous footing and lifts the floor off the ground, leaving a crawlspace or letting a house sit level on a slope. Full basement walls go deepest and carry the most reinforcement, because they hold back soil as well as the weight of the structure above. The concrete itself stays much the same across all three. What changes is footing depth, the steel, and how much wall sits below grade.
The lot usually decides which one makes sense. Cobb County is hilly, with 199 feet of local relief within a few miles, and a yard that looks flat from the street can fall away at the back corner. On a slope, a stem wall or a walkout basement often takes less dirt work than cutting a level pad for a slab. The dominant soil here is well-drained Gwinnett soil, but it varies across the county, so we test every site before recommending a foundation type. With about 59 inches of rain a year, drainage around the footing matters as much as the pour. We grade the property, read the conditions, and tell you which option fits.
Foundation pours rarely cost the same from one lot to the next, because the ground and the access set the price more than the concrete does. We walk the site, test it, and price what we find. Most of what moves the number is something you can check from your own yard.
| What changes the price | Which way | Why |
|---|---|---|
| Old slab, footings or stumps where the new foundation goes | costs more | Anything already in the ground has to be broken out and hauled off before we dig. |
| A clear path for the truck to back up to the forms | costs less | Concrete goes straight down the chute, with no pump and fewer hands. |
| A fence, tight side yard or soft lawn between the street and the work | costs more | We bring in a pump or pour in stages, and both add equipment and time. |
| A lot that slopes across the footprint | costs more | Cobb County is hilly, and a sloped site needs cutting, fill or stepped footings before forms go in. |
| Water that pools or runs toward the house after a storm | costs more | With about 59 inches of rain a year, drainage gets fixed first (gravel base, drain tile or regrading) or the foundation inherits the problem. |
| Plans that call for deeper footings, thicker walls or heavier reinforcement | costs more | More concrete and more rebar per foot, and every piece is placed and checked before the pour. |
| Utility lines crossing the dig | costs more | Lines get located and worked around by hand, which slows excavation. |
| Open, level ground with nothing in the way | costs less | Excavation and forming go quickly when the site is clear. |
When you compare bids, line up the scope before the totals. Check that each one covers excavation and haul-off, base material, footing depth, wall thickness, rebar size and spacing, a pump if the site needs one, and the permit. A lower number often leaves one of those out. Ask each contractor what they found on your site and how they plan to handle it.
It depends on the footprint, the depth of the footings, how much reinforcement the design calls for, and what the ground does between the stakes. Two foundations with the same square footage can price very differently. One sits on a flat lot with easy truck access. The other needs cut and fill before a single form goes up. We walk the site, measure it, and price that job. Call for a free estimate.
Formwork is the part people tend to underestimate. On a level lot the forms go up quickly and hold a straight line with little fuss. The ground here is hilly, with about 199 feet of local relief within a few miles, and it changes from block to block. Plenty of Marietta sites need stepped footings or taller forms on the low side, which means more lumber, more bracing and more labor. That is why we grade and test each site before we put a number on it.
Nearly every new foundation needs a building permit, and footings are normally inspected before any concrete goes in. We handle the permit. That covers the application, the drawings it asks for, and lining up inspections with the pour. Smaller flatwork, like a patio slab, can carry different requirements. We sort that out while planning the project, so it is not something you have to chase down yourself.
What you are pouring for moves the number more than anything else. A slab for a detached garage, footings for an addition and a full foundation for a new house are three different jobs. The median home in Marietta was built in 1986, so a lot of our residential work ties new concrete into an existing structure. Getting that joint right takes careful layout and the correct reinforcement. We price each project on its own after seeing it.
Nobody can price a foundation honestly without seeing the ground. The dominant local soil is well drained, but it varies across the area, so every site is tested before we settle on a footing design. Access matters as well: whether a truck can reach the forms directly or the concrete has to be pumped. Excavation, forming, steel and finishing are separate pieces of the work. We price them separately, so you can see what drives the total.
We pour foundations and slabs for retail buildings, restaurants and office space, along with the sidewalks, curbs, pads and entries that go around them. Decorative and stamped surfaces are an option where the finish is part of the frontage. When the property sits among the retail and restaurant frontage around Marietta Square, we plan staging and pour timing around the businesses that stay open next door. Structural or flatwork, the job gets the same site testing first.