Questions to Ask a Demolition Contractor
For owners taking bids to have a house, a garage, a pool or the inside of a building knocked down, usually with a rebuild or a remodel waiting behind it. The questions run in the order the decision does: the company, permits and hazards, price and scope, method and neighbors, salvage and debris, then the schedule and what you are handed at the end. The few that fit only an interior strip-out, an attached garage or a pool say so in their first words.
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The questions
Each question, and why to ask it
The company
Are you licensed for demolition where this property is, and which license class covers a job this size?
Why ask it
Some places license demolition as its own trade, some fold it into a general contractor's license, and some set limits by building height or contract value, so ask how it works there and write the number down. Look it up with the agency that issued it before the next conversation.
Does your liability policy cover demolition work specifically, and can your agent send me the certificate?
Why ask it
A general liability policy can exclude demolition, or work close to a neighboring structure, so a certificate with current dates does not settle it by itself. Have the agent confirm in an email that wrecking is a covered operation and what the limit is per claim. Workers' compensation is the second thing to check: find out whether it covers every person who will be on the lot, the truck drivers included.
How much of your work is demolition, and what were the last three jobs like mine?
Why ask it
An excavation or landscaping company that knocks down a garage now and then is a different hire from a firm that wrecks buildings every week. 'Like mine' means the same kind of job: a whole house, a pool, an interior strip-out. Three recent ones with addresses tell you more than a count of years in business.
Who does each part of the job: your own crew, or subcontractors for the abatement, the hauling and the backfill?
Why ask it
Subcontracting parts of a teardown is ordinary, and abatement in particular is often a separate licensed firm. What you need is the name of each company, proof that each one is insured, and one person who answers for all of them.
Who will be on the excavator, and who is in charge of the site when you are not there?
Why ask it
The person who sells the job and the person who runs the machine are often not the same, and the second one makes the decisions that matter: which wall goes first, when to stop for a wire or a neighbor's fence. Get the name, how many years they have been taking buildings down, and a phone number that is answered at seven in the morning.
Which builders use you to clear their lots, and may I call one?
Why ask it
The builder who dug the next foundation knows things an owner does not: whether chunks of the old basement were buried, whether the fill held, whether the lines were capped where the paperwork said. One such call is worth several to homeowners. For an interior strip-out, the remodeler who followed the crew in is the equivalent call.
Have you ever damaged a neighbor's property or hit a live line, and how was it put right?
Why ask it
Anyone who has wrecked buildings for years has a story, and the useful part is the hour after: who they called, who paid and what they do differently now. Be slower to believe a long career with no incident at all than one with an incident that is explained.
Has the company been cited or shut down on a job by a safety or environmental agency, and what was it for?
Why ask it
In many places these records are public, so the answer can be checked, and that is the reason to ask it plainly. A citation they explain, along with what changed afterward, is not a reason to walk away. An answer that does not match what you find later is.
Permits and hazards
Who pulls the demolition permit, whose name goes on it, and is the fee in your price?
Why ask it
Whether a permit is needed at all is decided locally: a whole house nearly always, a shed or an interior strip-out sometimes not. The usual arrangement is that the contractor applies in the company's name and lists the fee on the bid. If you are asked to pull it as the owner, call the building department first and find out what that would make you responsible for.
What does the building department want before it will issue the permit?
Why ask it
Depending on the place, the list can include an asbestos survey, letters from each utility confirming disconnection, a pest inspection, an erosion plan, a tree review or a notice period for neighbors. A contractor who works in your town regularly can recite it, and the ones who cannot will learn it on your schedule.
Does this building need an asbestos survey before you can start, and who should do it?
Why ask it
Many jurisdictions want a survey by an accredited inspector before a building is wrecked or gutted, whatever its age, so find out the rule where you are. An inspector who is independent of the company that would do the removal has no reason to find more or less than is there. Old flooring, pipe wrap, siding, roofing and textured ceilings are the usual places it turns up.
If the survey finds asbestos, who removes it, and is that inside your price or a separate contract?
Why ask it
Removal is commonly done by a separately licensed abatement firm before the wrecking starts, and it can add days and a real share of the cost. The thing to pin down is whether the bid assumes a clean building, and what the number becomes if it is not. Some kind of clearance or completion document normally follows the removal; ask what it is called there and who hands it to you.
How do you handle lead paint, in the teardown and in the debris?
Why ask it
On a house old enough to have it, the questions are dust and disposal: how the material is kept wet, and whether the landfill wants painted debris tested or handled apart. Rules differ by place and by whether people are living in the building, so have the contractor say which ones apply to this job.
What else do you look for before you start: a buried oil tank, a septic tank, a well, refrigerant in the air conditioner?
Why ask it
Each of these has its own way of being closed out, and several need a specialist or a sign-off from an agency. Tell the contractor what you know about the property's history, including an old fill pipe by the foundation or a patch of lawn that never grows. Settle now who pays if one is found after the machine arrives.
Who arranges the gas, electric, water and sewer disconnects, and what proof do you need before a machine touches the building?
Why ask it
In some places only the owner can request a disconnect from the utility, and in others the contractor does all of it, so settle who makes each call. The proof to expect is written confirmation from every utility, not a meter that happens to be missing.
How long do the disconnects take around here, and which utility is slowest?
Why ask it
The wait for a gas or electric crew is often the longest single item before a teardown, and it sits outside the contractor's control. Someone local will name the slow one without thinking. Put the requests in the day you choose a contractor, or earlier if the utility lets an owner apply.
Who has the underground lines marked, and what about the private ones the locating service does not cover?
Why ask it
The public locating service (811 in the United States) generally marks what the utilities own, up to the meter. A sprinkler system, a gas line to a grill, power to a detached garage or a septic line is yours, and nobody marks those unless a private locator is hired. Hand over any drawings you have, and walk the yard together.
Which inspections happen along the way, and does work stop until each one passes?
Why ask it
Common ones are a check before work begins, a look at the open hole or the capped sewer before backfill, and a final visit to close the permit. The order matters, because filling the hole before an inspector has seen it can mean digging it out again. Being copied on each result costs the contractor nothing and gives you the dates.
Price and scope
Will you walk the property before you price it, and what will you be looking at?
Why ask it
A number given from photos or from the curb is a guess that gets corrected later with change orders. On a walk you should see them check the foundation type, how a truck gets in and out, the overhead wires, the distance to the neighbors and what is stored inside. Bring the survey or plot plan if you have one.
Is your number a fixed price for the scope we walked, or an estimate, and how long does it hold?
Why ask it
A fixed price leaves the cost of a slow week or a misjudged building with the contractor; an estimate leaves it with you. Permits and utility disconnects can run long enough that a bid expires before the work can begin, so the date it holds until matters as much as the figure.
What exactly comes out under this price: the building, the foundation, the slab, the driveway, the walks, the trees?
Why ask it
Bids for the same house differ mostly in where they stop. Have each item written as included or excluded, and add the ones nobody mentioned: the shed, the fence, the deck footings, the stumps. A line reading 'demolish structure' with nothing after it leaves the foundation open to argument.
Are the footings and basement walls removed completely, or broken up and buried on site?
Why ask it
Burying broken concrete is cheaper, and where it is allowed it can be fine under a lawn. Under a new house it is a different matter, so ask your builder or engineer what they need and whether local rules permit it at all. Whatever is agreed, have the bid say 'full removal' or name the depth to which things come out.
What will you fill the hole with, how is it compacted, and does anyone test it?
Why ask it
Loose fill settles for years, which matters little under grass and a great deal under a slab or a driveway. The details that decide it are where the fill comes from, whether it goes in as layers and what machine packs it down. If you are rebuilding, your engineer may want a compaction test, and your builder may prefer the hole left open.
How will you leave the grade, and is seed, straw or erosion control part of the job?
Why ask it
'Rough grade' can mean a tidy, gently sloped lot or a field of ruts that holds water against the neighbor's fence, so ask which way the water will run when they are done. A bare lot may also need silt fence or ground cover under local rules, and someone has to look after it until building starts.
Are hauling and dump fees a fixed part of the price, or billed by the load or the ton?
Why ask it
Disposal is one of the largest costs in a teardown, and a bid that bills it by weight has no ceiling. If they insist on billing per ton, get their estimate of the tonnage in writing and a cap on the total.
What would trigger a change order, and what do you charge for the usual surprises?
Why ask it
The standard ones are a tank nobody knew about, a second slab under the first, more asbestos than the survey found, and rock or old fill below the foundation. A unit price for each is easiest to get now, while you still have other bidders. Any change should be priced in writing before the extra work is done, not at the end.
For an interior job: where exactly does your work stop and the remodeler's begin?
Why ask it
'Down to the studs' leaves a lot undecided: the subfloor, the ceiling, the insulation, the nails and staples, the old ductwork. Capping the plumbing and making the wiring safe is its own line, since in many places that takes a licensed trade. A walk-through with your remodeler before the strip-out settles most of it.
For a pool: are you quoting full removal or a partial fill-in, and what does each mean for that part of the yard?
Why ask it
A partial removal breaks holes in the bottom, knocks down the top of the walls and buries the rest; a full removal takes everything out. The cheaper one may limit what can be built there later and may have to be disclosed when you sell, depending on local rules. Ask the building department which methods it permits before you compare prices.
How much do you want before the machine arrives, and what is each later payment tied to?
Why ask it
A teardown is short and needs few materials, so there is less reason for a large payment before work than on a building job. Milestones that can be seen work well: permit issued, structure down, hole filled, permit closed.
If your hauler or abatement firm goes unpaid, can they make a claim against my property, and what do you give me to prevent it?
Why ask it
In many places an unpaid subcontractor can make a claim against the property even after the owner has paid the contractor in full. Signed releases with each payment are the usual protection, under a name that varies locally. If the sums are large, a lawyer who handles construction can tell you what to collect.
Method and neighbors
How will you take the building down, and why that method on this lot?
Why ask it
An excavator with a thumb is the usual tool for a detached house, with hand work where a neighbor, a wire or a shared wall is close. The reasoning is what you are listening for: which side they start from, which way things fall and where the machine sits. A plan that would be the same on any lot is not a plan for yours.
The closest neighboring building is only a few feet away. What changes on that side?
Why ask it
Measure the gap before the meeting so the conversation is about a real number. Expect to hear about taking that wall down by hand or in small bites, pulling debris inward, and possibly screens or plywood over the neighbor's windows.
For a garage or addition attached to a house that stays: where do you cut, and who closes up the wall left behind?
Why ask it
The cut line decides everything after it: which studs, roof framing and wiring belong to the part that goes, and what is holding up the part that remains. Some demolition crews stop at a tarp and leave the framing, siding and roofing to a carpenter, so get the handoff in writing. If the two share a foundation or a roof line, ask whether an engineer should look first.
For an interior job: how do you know which walls are carrying load, and who designs the temporary support?
Why ask it
Skip this for a full teardown. For a gut or a wall removal, the answer you want involves drawings or an engineer, not a knock on the wall. Two follow-ups: who pays for the engineer, and whether the permit covers the structural part.
For an interior job in a house we are living in: how is the work area sealed off, and which way does the debris leave?
Why ask it
Plastic walls, a covered path to the door, closed-off ductwork and a fan pulling air out of the work area are the kinds of things to hear about. The route matters as much as the seal: a chute from a window or a short carry to the dumpster keeps rubble out of the rooms you sleep in. Where old paint or plaster is being broken up, ask which lead-safe training or certification the crew holds, since the requirement varies by place.
Will you photograph the neighbors' houses, fences and driveways before work begins?
Why ask it
A dated set of photos or a video of existing cracks protects everyone, the contractor included, when a neighbor notices one a week later. It is worth taking your own as well, with the neighbor's permission and ideally with them standing beside you.
How do you keep the dust down, and where does the water come from once my service is shut off?
Why ask it
Wetting the building as it comes apart is the normal method, and it needs a steady supply at a point when the house has none. The answers you might hear are a hydrant meter from the water utility, a water truck, or a neighbor's spigot by arrangement. No answer at all means nobody has planned for the dust.
What vibration should the houses nearby expect, and is anything close by fragile?
Why ask it
Breaking a foundation or a pool shell with a hydraulic hammer is the part neighbors feel. Point out old stone foundations, retaining walls, plaster ceilings next door and anything on a slope. There is often a gentler method for the stretch nearest those, and it is better to learn its price now than after a complaint.
How is the site kept safe overnight and over a weekend?
Why ask it
A half-wrecked building and an open basement hole draw children and the curious. The specifics to get are the fencing, whether the hole is ever left open, and where the machine is parked and locked. Some permits set fencing rules of their own.
What will the trucks do to the street, the curb, the sidewalk and my driveway, and who repairs the damage?
Why ask it
Loaded dump trucks crack sidewalks and crush curbs, and the town may hold the owner or the permit holder responsible. Mats or steel plates are the usual protection; a bond or deposit to the town is sometimes part of the permit, so find out whose money that is. Photograph the curb and the walk before the first truck arrives.
Which trees, fences and structures are staying, and how will you mark and protect them?
Why ask it
Walk the lot together and tag everything that stays, because an operator cannot guess that the old maple matters to you. Roots are damaged by a machine driving over them long before a branch is touched, so ask where the fence around each tree will go. Put the list of things to keep in the contract.
What hours will the crew work, which way will the trucks come, and who tells the neighbors?
Why ask it
Some towns require written notice a set number of days ahead and limit the hours of noisy work; elsewhere both are simply good manners. A knock on the door from you, with the dates, the hours and the supervisor's phone number, heads off most complaints.
Salvage and debris
Before you start, can I or a salvage company take out what is worth keeping, and how many days do I get?
Why ask it
Doors, mantels, old flooring, light fixtures, appliances and cabinets are the things people most often want back. Agree a window on the calendar and who is allowed inside, since some contractors will not have others in the building once it is theirs. Anything left after that date goes in the truck.
Do you offer deconstruction, or work with a company that does, and how do cost and time compare?
Why ask it
Taking a house apart by hand for reuse takes far longer than a machine and costs more in labor. Some owners donate the materials; whether that brings any tax benefit is a question for a tax professional, not the contractor. A few places require deconstruction for older houses, so check whether yours is one.
Who owns the salvage, and is its value reflected in your bid?
Why ask it
Copper pipe, wiring, steel beams, old brick and big timbers have resale value, and many contracts give all of it to the contractor unless they say otherwise. That is reasonable if the price already accounts for it. Anything specific you want to keep needs to be named in writing.
Where does the debris go, and how much of it is recycled?
Why ask it
Concrete, metal and clean wood can often be separated and recycled, and some jurisdictions set a minimum share for demolition waste. The answer should come with names: which landfill, which recycling yard. Vagueness here deserves a second ask, because dumped debris can sometimes be traced to the property it came from.
Can I have the dump tickets or weigh slips when the job is done?
Why ask it
The tickets show that the loads went to a licensed facility and, if you paid by weight, that the tonnage is real. Some permits will not close without them. Write the request into the contract, since they are easy to hand over when it is expected and hard to reconstruct afterward.
What should I clear out of the building first, and what do you charge for contents left behind?
Why ask it
Furniture and household junk add weight to every load, and things like paint, chemicals, tires, propane cylinders and electronics usually cannot go to the landfill with the rubble. Get the list of what must be gone and the price per load for the rest. Emptying the house yourself is often the easiest money to save on the whole job.
Schedule and handover
Once the permit and disconnects are in hand, when can you start and how many working days will it take?
Why ask it
The wrecking itself is usually the short part, and the weeks before it are where the time goes. Get the two numbers apart: the wait to start and the days on site. What else they have booked that month, and what a week of rain does to the plan, tells you how firm either number is.
My builder needs the lot by a set date. What do you need from me, and by when, to hit it?
Why ask it
Work backward with the contractor from that date through backfill, the teardown, abatement, the permit and the disconnects. You will probably come out with two or three things only you can do, such as signing utility forms or emptying the house. Then find out whether the contract can carry the date, and what happens if it is missed for reasons within their control.
What will the lot look like on the day you leave?
Why ask it
Have them describe it as a picture: level or sloped, bare soil or seeded, fenced or open, a pile of fill left for the builder or nothing at all. Include the small debris, the glass, nails and bits of brick that sit in the top few inches. That description, written down, becomes the standard for the final walk.
Will you record where the water and sewer lines were capped, for whoever builds next?
Why ask it
The next crew has to find those caps to reconnect, and a capped pipe under several feet of fill is hard to locate from memory. A stake on site, measurements from two fixed points and a photo taken before the cap is covered are enough. Check whether the utility or the town wants to witness the cap.
Which documents do you hand me when the job is closed out?
Why ask it
A complete file might hold the closed permit, the asbestos survey and clearance, the utility disconnect letters, the dump tickets, any tank or well closure records and a compaction report if one was done. Your builder, your lender or a future buyer may ask for any of them. List the documents in the contract and tie the last payment to receiving them.
If the fill settles, or the next excavation turns up buried debris, will you come back?
Why ask it
What they stand behind, and for how long, belongs in the contract as a sentence. Buried rubble that the new builder digs up is a familiar dispute after a teardown, and it is far easier to settle when the bid said 'full removal'.
Before the last payment, will you walk the lot with me and my builder?
Why ask it
Three people looking at the same ground at the same time ends most arguments before they begin. Bring the written scope and check it off: what came out, what stayed, the grade, the caps, the neighbor's fence. Pay the balance once the list is clear and the permit is closed.
How to hire a demolition contractor
Practical guidance for the conversation itself
Before you ask for bids
Write the scope as two lists
One list for everything that goes: the house, the foundation, the detached garage, the driveway, the oil tank if there is one. One for everything that stays: trees, a fence, a well, the neighbor's retaining wall. Hand the same two lists to every bidder, so the prices describe one job.
Ask your builder what the ground should be like
If something new is going up, the builder or engineer decides whether the hole is filled or left open, how deep the old footings must come out and whether the fill needs testing. Get that in an email and attach it to the bid request. Demolition priced without it is often priced twice.
Call the building department yourself
A short call tells you whether a permit is needed, what has to be filed with it and how long approval is running. You will then know whether each contractor's account of the local rules is accurate. Find out too whether an owner may apply or only a licensed contractor.
Start the slow items early
Utility disconnects and an asbestos survey can often be requested by the owner before any contractor is chosen; ask each utility and the building department whether that is so where you are. Both commonly take longer than the wrecking. A survey in hand also lets every bidder price the same hazards.
At the site walk
Have every bidder walk it
Meet each contractor on the property and go around the outside, through the building and down to the basement. Notice what they measure and what they ask about. The ones who look up at the wires and over at the neighbor's wall are pricing the job in front of them.
Show them the edges
Point out the property lines, the shared driveway, the fence that is yours and the one that is not. Bring the survey if you have it. The few feet nearest someone else's property are where a teardown can do harm that is costly to put right, and careful contractors spend their questions there.
Ask for the first morning in order
'What happens on day one, from when the truck arrives?' draws out the real sequence: fence up, utilities checked, water for dust, where the machine starts. A contractor who has done it many times answers in order and without effort. Gaps in the story are gaps in the plan.
Keep the paperwork for email
License numbers, insurance certificates, references and the payment schedule are easier to check in writing than to hear across a yard. Send those questions the same evening and see how quickly and how completely they come back.
Lining up the bids
Give each exclusion its own row
Make a table with a row for the permit, the survey, abatement, disconnects, the foundation, backfill, grading, hauling, dump fees and street repair. Mark each bid included, excluded or silent. Go back to every contractor about the silent rows before you compare totals.
When one bid is far below the others
Look first at the foundation and the disposal. A low number often leaves footings in the ground, bills the dump by the ton or assumes a building with no asbestos. Once the missing rows are priced the gap usually has an explanation, and if it does not, ask the bidder directly how they get there.
A house, a pool, a garage and an interior are different bids
For a whole building the weight is on utilities, foundation and fill. For a pool it is full against partial removal and what the yard can be used for afterward. For an attached garage it is the cut line and the wall that is left. For an interior it is structure, dust and the line between the demolition crew and the remodeler. Leave out the questions that belong to the other kinds of job.
Machine or by hand
If you are weighing deconstruction against a conventional teardown, ask both companies for a price, a duration and a list of what is saved. Put your builder's start date next to the two durations. The calendar often makes the choice before the price does.
Reasons to pass on a bidder
A price without a visit
Nobody can see a basement, a buried tank or the gap to the neighbor from a photo. A figure given that way will be revised, and the revision comes after you have signed.
Permits waved away
'Nobody bothers with a permit for this' saves the contractor a fee and a wait, and leaves the owner with the consequences, which you can ask the building department to describe. The same goes for a suggestion that the asbestos survey can be skipped because the house looks fine.
Ready to start before the utilities confirm
A contractor who will begin on the strength of a missing meter or a neighbor's word is taking a risk with a gas line on your property. Written confirmation from each utility comes first, however hard the schedule is pressing.
Cash, a large advance, no contract
A teardown needs little bought in advance, so a request for most of the money before the machine arrives deserves a direct question about why. A one-line invoice in place of a contract leaves the foundation, the fill and the paperwork undefined.