Garages, sheds, shops, pads

Garage & Shed Slabs in Manhattan, KS

Garage & Shed Slabs in Manhattan, Kansas, built flat, square and ready for the building that goes on top.

We measure on site before naming a price, and the quote arrives in writing, line by line
Every outdoor pour: compacted crushed rock underneath, air-entrained concrete, joints laid out ahead of time
Permit and right-of-way questions checked with the city or county before a date is booked

A Slab That Fits the Building on It

Garage & Shed Slabs are the foundation and floor in one for a detached garage, a backyard shed, a workshop or a carport in Manhattan, KS. The slab has to be flat, square and the right height, or the building on top will fight it for its whole life. It also has to suit what it carries: a lawn mower is not a pickup on a jack stand.

Lots around Manhattan vary a lot. Some yards near the hills hit limestone or chert gravel a short way down. Others, especially lower ground, have deeper clay that swells when wet and shrinks in dry spells. Before we quote a slab, we look at the site, where water goes in a storm, and how much digging and fill it will take to make a level pad.

Planning the slab

Footprint: we lay out from your plans or kit drawings so anchor bolts and door openings end up exactly where the framing needs them.
Thickness: HomeGuide's slab guide prices 4-inch slabs at $6 to $8 a square foot and 6-inch slabs at $8 to $10. Shed floors are often 4 inches; garages and shops carrying heavier loads usually go thicker.
Edges: detached garages and larger buildings often call for thickened edges or footings under the walls. We confirm the requirement with the City of Manhattan or the county before pouring.
Height and fall: the slab sits high enough to shed water, and a garage floor pitches slightly toward the door.

Get a Free Estimate

The build

Topsoil comes off, we dig to firm ground, then bring in crushed rock and compact it. HomeGuide prices a gravel base at $1 to $3 a square foot, and it pays for itself. Forms are checked for square by measuring both diagonals. Inside an enclosed garage or shop, a vapor barrier goes under the concrete to keep ground moisture from coming through. Steel sits on chairs, anchor bolts go in to match your layout, and the slab is poured, troweled smooth or lightly broomed, jointed and cured.

Replacing an old garage floor

An older detached garage may have a cracked, sunken floor with puddles that never drain. If the walls are sound, the old floor can often be broken out and replaced inside the building. Access is tighter and some work is done by hand, which affects the price, but the result is a dry, level floor you can use again.

Shed pads and small slabs

A shed pad is a small job, but the details still matter: a level, compacted base, a slab a bit larger than the shed footprint, and a top a few inches above the yard so the floor stays dry. HomeGuide lists shed slabs at $600 to $4,800 for sizes from 10 by 10 to 20 by 20.

Call (785) 509-7585 to talk about a garage, shop or shed slab.

Slab Projects

We pour slabs for these building types and uses.

Detached garage slabs

Floors with thickened edges or footings where required and anchor bolts placed to the plan.

Garage floor replacement

Old, cracked floors broken out and repoured inside an existing garage.

Shed pads

Level slabs for storage sheds and kit buildings.

Workshop and pole building floors

Thicker slabs for vehicles, lifts and heavy tools.

Carport, trailer and RV pads

Parking pads sized and thickened for the load.

Typical Slab Costs

Item	Published range
Concrete slab, per sq ft installed	$6 to $12
4-inch slab, per sq ft	$6 to $8
6-inch slab, per sq ft	$8 to $10
10' x 10' slab (100 sq ft)	$600 to $1,200
20' x 20' slab (400 sq ft)	$2,400 to $4,800
Two-car garage floor	$2,400 to $6,900
Shed slab, 10' x 10' to 20' x 20'	$600 to $4,800
Gravel base, per sq ft	$1 to $3

National ranges from HomeGuide's concrete slab cost guide. Prices in Manhattan, KS can differ, and access, slope, thickness and how much old concrete comes out all change the total. Your written estimate is the price.

Our Slab Process

1. Match the building

Plans, loads, access and any permit or footing rules reviewed together.

2. Dig and base

Topsoil removed, crushed rock packed, forms squared and set to height.

3. Steel and pour

Vapor barrier if needed, rebar or mesh, anchor bolts, then concrete.

4. Finish and cure

Surface finished, joints cut, slab cured before framing starts.

Concrete Repair & Replacement in Manhattan, KS

Garage & Shed Slabs Questions

How thick should a garage slab be?

Four inches is common for floors that carry cars, with thickened edges under the walls where required. Shops with lifts or heavy equipment often go to 5 or 6 inches. We size it to how you'll use it and to local rules.

Do I need a permit for a garage or shed slab?

Detached garages often need a building permit, and larger sheds can too. Manhattan, the counties and the surrounding towns each set their own rules, so we check before we pour.

How long before a building can go on the slab?

Framing can often start after several days, but concrete keeps gaining strength for about a month. We will give you a date based on the weather and the load.

Should the slab have a vapor barrier?

For an enclosed garage, shop or any floor you want dry, yes, because it blocks ground moisture from wicking up. Open carports and simple pads often go without.

Get a Garage & Shed Slabs Estimate

Send the building size and any plans. We'll look at the site and write up a slab quote.

Call (785) 509-7585 Free Estimate