How to Compare Demolition Bids That Do Not Match

Owners regularly receive demolition bids that differ by a wide margin for what looks like the same building. The instinct is to assume the low number is a bargain or the high number is padded. Usually neither is true. The bids are for different jobs, because each contractor made different assumptions about the things the owner did not specify. Here is how to line them up.

Start with what is excluded

The most useful part of a demolition bid is the exclusions list. That is where the scope actually lives. Read every bid's exclusions before looking at any total, and build a simple grid: for each item, does the bid include it, exclude it, or say nothing?

The items that swing totals the most:

Slab and foundations. In or out? Down to what depth? Footers included? This one item can be the largest single difference between bids.

Asbestos abatement. Included, excluded, or "by others." A bid that includes abatement without a survey in hand is guessing. A bid that excludes it is cleaner but leaves you to carry that scope.

Permits and fees. Who applies, who pays the fee, and whose name is on it.

Utility disconnects. Who coordinates with the power, gas, and water providers, and who pays any disconnect and capping fees.

Pavement, curbs, and site features. Is the parking lot in the scope? The fence? The pylon sign? The pool?

Backfill and final grade. Does the site get left as an open hole, a rough grade, or a compacted pad ready for the next contractor?

Equipment and scrap. Does the contractor keep the scrap and equipment value, credit it to you, or leave it for you to sell separately?

Ask for the tonnage assumptions

Haul-off and disposal is one of the largest components of a demolition price, and it is driven by weight. A bid that states the tonnage it assumes by material type, and the rate per ton, is one you can check and hold someone to. A lump sum with nothing behind it is a number that can change once the trucks start weighing in. We go into the mechanics in demolition debris hauling: how cost per ton really works.

Understand how equipment value is handled

On an industrial building, the chillers, generators, transformers, switchgear, and process equipment inside can be worth a meaningful amount. Some contractors ignore it. Some quietly keep it and bid lower to win. Some appraise it and credit it to the owner explicitly.

We do the last one. Because we buy used industrial equipment directly, we appraise what is inside before we price the demolition, and the credit is a visible line on the quote. When comparing bids, ask each contractor how they handle equipment and scrap, and add or subtract accordingly so the totals reflect the same arrangement.

Normalize, then compare

Once the grid is filled in, adjust each bid to a common scope. If bid A includes the slab and bid B excludes it, either add a slab allowance to B or ask A for a price without it. If one bid includes permit fees and another does not, add them. When every bid describes the same job, the totals become comparable and the spread usually narrows dramatically.

If a bid is still far below the others after normalizing, look harder. Common reasons are an unrealistic tonnage assumption, a plan to leave material on site, or a contractor without the insurance or licensing the job requires. That last one is worth verifying directly, and we cover what to check in demolition insurance and bonding.

Give every bidder the same scope

The simplest fix is to prevent the mismatch. Before soliciting bids, write a one-page scope that answers the questions above: slab in or out, abatement by whom, pavement in or out, final site condition, equipment handling, permit responsibility. Attach the asbestos survey if you have it. Every contractor prices the same job, and you spend your time comparing contractors instead of decoding proposals. A template for that document is in what a demolition scope of work should actually contain.

Frequently Asked Questions

Why do demolition bids vary so much?

Because unstated scope items like slab removal, abatement, and pavement are assumed differently by each contractor. Normalize the scope and the spread shrinks.

Should I always take the lowest bid?

Take the lowest bid for the same scope from a contractor who is properly licensed and insured. A low bid for a smaller scope is not a lower price.

What if the contractor will not provide tonnage assumptions?

That is a reason to be cautious. Tonnage is how disposal is priced, and a contractor who has not estimated it has not really estimated the job.

How is equipment inside the building handled in a bid?

It varies. Ask directly whether the contractor keeps it, credits it, or leaves it to you. We appraise it and credit it on the quote.

Demo Dynasty provides itemized demolition and plant cleanup quotes across Florida and the Southeast from Auburndale, FL. Call (689) 323-4676 or request a quote.