Concrete · Service

Concrete demolition, priced by weight, not by area

Two slabs of identical size can differ by half again in price. What changes it is how much steel is in them and whether a machine can reach them.

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In short

What is concrete demolition?

Concrete demolition is the breaking out, loading and disposal of an existing slab, footing, wall or steps. Unlike most concrete work it is priced by weight and access rather than by area: heavily reinforced or unusually thick concrete takes far longer to break and cut, and a back garden a machine cannot reach turns a one-day job into several. Utility locates come before any of it.

Triggers

Signs you need concrete demolition

A driveway, patio or walkway is being replaced and the existing slab cannot stay
The slab has broken up beyond any sensible repair or lifting
You are converting hardscape back to lawn, planting beds or a different surface
A structure is being removed — steps, a stoop, an old shed pad, a redundant footing
A service line, drain or foundation repair needs access through concrete
An old slab is sitting where an addition or a garage is going
A pool surround or deck is being removed as part of a larger project

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The job

How concrete demolition actually works

Utility locates, before anything else

Buried services are located and marked before breaking starts. Gas, water, sewer, electric and communications lines run under and beside driveways and patios more often than people expect.

Watch for: A crew arriving to break concrete with no marks on the ground. Locates take time to arrange and are not optional. A contractor treating them as a formality is a contractor you do not want operating a breaker over your gas service.
Assessing thickness, reinforcement and what is underneath

A core or an edge inspection tells the crew how thick the slab is and whether it holds mesh, rebar or, in older work, nothing at all. Reinforcement is the single biggest driver of how long breakout takes.

Watch for: A price quoted purely on square footage with no one having looked at an edge. Heavily reinforced concrete has to be cut as well as broken, and that difference is where change orders come from.
Planning access and protection

The route for the machine and for the debris is planned, and lawn, driveway edges, fences and services along it are protected. Where a machine cannot reach, the work becomes hand-breaking and barrowing.

Watch for: No plan for the route across the lawn. A tracked machine and loaded barrows leave ruts and compact soil, and repairing that afterwards is a cost nobody quoted.
Saw cutting the boundary

Where only part of a slab is coming out, the line is saw cut first so the concrete that stays has a clean, square edge rather than a ragged broken one.

Watch for: Breaking to a line without cutting it. The break wanders under the remaining slab, undermines it, and the new pour then has a poor edge to butt against.
Breaking out

A hydraulic breaker on an excavator, or handheld breakers on smaller or access-restricted work, reduces the slab to liftable pieces. Reinforcement is cut as it is exposed.

Watch for: Dry cutting and breaking with no water suppression or extraction. Concrete dust contains crystalline silica, and this is the dustiest operation in the trade.
Loading, hauling and disposal

Material is loaded into a truck or container. Clean concrete can often go to a recycling facility to be crushed for aggregate, which is usually cheaper than landfill and better than it.

Watch for: Container weight limits. Concrete fills a container by weight long before it fills it by volume, and an overweight container is either refused or charged as an overage.
Grading and handover

The exposed subgrade is graded and, where a new slab is coming, left ready for base material. Where the area is going back to lawn, it needs topsoil rather than the compacted fill left behind.

Watch for: A hole left full of broken fragments and compacted rubble under future planting. Nothing grows in that, and removing it later is a second job.

Money

What does concrete demolition cost?

Demolition is normally quoted per square foot plus disposal, but reinforcement, slab thickness and machine access move the number more than area does. Recycling clean concrete is often cheaper than landfill. Hand demolition in an inaccessible yard costs considerably more. See the Cost Guide.

See the full concrete demolition cost guide — by material, size and region →

Straight answer

When concrete demolition is the wrong call

Everyone else ranking for this is paid when you say yes. Here's when you shouldn't.

The slab is sound and has only sunk. Lifting a structurally good slab back into place costs a fraction of demolishing and replacing it, and it keeps the material out of a truck entirely.
The new surface can go over the top. Some overlays and some paver systems can be built over a sound existing slab. That only works if the existing concrete is genuinely stable and the added height is acceptable — but where it is, it skips the whole job.
You have not confirmed what runs underneath. Services under a driveway or patio are common. Demolition before locates is how a project becomes an emergency, and no saving is worth that.
The concrete may be structural. A slab that is bearing on or supporting part of a structure, a retaining element, or a footing is not flatwork. It needs an assessment before it is broken, not after.
Nothing is scheduled to replace it. A bare, ungraded subgrade erodes, ponds water and becomes a mud problem. Coordinate the demolition with whatever is going in, rather than clearing the site months ahead.
Access will not take a machine and the area is large. Hand demolition of a big slab is slow, punishing work and the price reflects that. It is worth pricing alternative access, even temporary fence removal, before accepting it.

Straight answer

Can I do this myself?

Breaking and cutting concrete generates crystalline silica dust, a well-established respiratory hazard requiring water suppression or extraction plus respiratory protection. Buried utilities are the other serious risk, and locating them before any breaking begins is not a step to compress.

Reasonable to DIY

Removing small, thin, unreinforced slabs — a shed pad or a short path — with a rented breaker and time
Hauling broken material to a recycling facility yourself if you have the vehicle capacity
Clearing and protecting the area before a crew arrives
Arranging the utility locate yourself, which is a call you can make regardless of who does the work

Call a licensed pro

Anything reinforced, which needs cutting as well as breaking
Anything near or attached to a foundation, a retaining wall or a structure
Anything over or near located services
Large areas, where the disposal logistics alone exceed what a homeowner can practically manage
Any breaking indoors or in an enclosed space, where dust control is a serious undertaking

Before you sign

What to check when hiring for concrete demolition

Who arranges the utility locate, and when?

It has to happen before breaking, and it takes lead time. Establish ownership of it before you agree a start date.
Have you checked thickness and reinforcement, and how?

This is the number that drives the price. A quote made without looking at an edge is an estimate waiting to be revised.
Is disposal included, and is there a weight cap?

Concrete hits container weight limits fast. Overage charges are the most common surprise on this job.
Will clean concrete be recycled?

Often cheaper than landfill as well as better. Worth asking, because it is not always the default.
How will the machine reach the area, and what gets protected on the route?

Lawn damage, driveway edges and fences. Establish who repairs what before tracks cross the garden.
Are you saw cutting the boundary where the slab stays?

Straight cut edges protect the remaining concrete and give the new pour something square to work to.
What condition is the ground left in?

Graded and ready for base is a different handover from a hole full of rubble, and both get called "cleared".

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Local pros

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Related work

Often done at the same time

Concrete Installation

What usually follows demolition

Driveway Installation

The most commonly demolished slab

Concrete Leveling

The alternative when the slab is sound

Concrete Repair

Partial fixes before full removal

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FAQ

Concrete Demolition — questions people ask

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What drives the price of concrete demolition?

Weight and access, more than area. Reinforcement is the biggest single factor — mesh or rebar has to be cut as the concrete comes apart, which slows everything down. Thickness, whether a machine can reach the slab, and how far material has to be carried to the truck all matter more than the square footage, which is why two identically sized slabs can be priced very differently.

Can broken concrete be recycled?

Clean concrete without contamination is widely accepted at recycling facilities, where it is crushed and reused as aggregate. It is frequently cheaper to dispose of that way than to landfill it. Contamination — soil, rebar left in, asphalt mixed through, or general demolition waste — is what usually pushes a load to landfill instead, so it is worth asking how the crew will keep it separated.

Do I need to call before digging if I am only removing a slab?

Yes. Utility locates are about what is under and around the concrete, not about how deep you intend to go, and a hydraulic breaker reaches further than people expect. Services routinely run beneath driveways and along the edges of patios. Arranging the locate takes lead time, so it should be booked before the work is scheduled rather than the morning of.

How long does it take to remove a driveway?

With machine access and typical residential reinforcement, breaking out and hauling a driveway is often a day or two. Hand demolition in a yard a machine cannot reach can take several times longer. Waiting on utility locates, and container swaps when the first one hits its weight limit, are the two things most likely to extend the schedule.

Does the whole slab have to come out?

Not necessarily. Partial removal is routine — saw cutting a clean line and taking out only the failed section, or only the area a new structure needs. It saves both breakout and disposal. The condition is that the concrete left behind has to be sound and well supported, otherwise you are building a new pour against an edge that is on its way out.