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TL;DR: Demolition mobilization costs - crane rental, equipment transport, crew staging, hazmat survey - represent 25-35% of total job cost on structural demolition projects. GC-drafted SOVs assign 5-8% to mobilization. SPM negotiates mobilization at actual cost percentage before every contract execution. The billing structure fix on one $400,000 demolition job is worth $68,000-$108,000 in improved early-phase cash flow.

Demolition Cash Flow

Demolition Mobilization Is
Your Biggest Cash Flow Problem.

Crane setup, equipment mobilization, and crew staging represent 25-35% of demolition job cost. GC-drafted SOVs assign 5-8% to mobilization. You fund the gap from operating cash for 4-6 weeks on every job.

Published: May 2026 · Updated: May 2026

The Problem

Three Ways Demolition Contractors Lose Margin

GC-Drafted SOV Assigns 5-8% to Mobilization

On a $400,000 demolition job a GC SOV with 6% mobilization bills $24,000 at mobilization. Actual mobilization cost - crane, equipment transport, crew staging, hazmat survey, site setup - runs $100,000-$140,000. You fund the $76,000-$116,000 gap from operating cash for the first 4-6 weeks of every demolition job.

Hazmat Discovery Not Billed as Changed Condition

The pre-demolition hazmat survey identified 2,400 SF of floor tile with suspect ACM. During demolition you discover pipe insulation in the mechanical room not in the original survey. Abatement costs $44,000. The specification says contractor is responsible for hazardous materials encountered. SPM reviews the contract and notices the differing site conditions clause allows recovery if notice is filed within 72 hours of discovery.

Tipping Fee Variance Absorbed Without Tracking

Tipping fees at the receiving landfill increased 18% since bid date. Material volumes exceeded estimate by 12% due to debris discovered behind drop ceilings. Those two factors combined added $22,000 to the job cost. Neither was tracked to a change order because the cost code structure did not separate tipping fees by material stream.

The Fix

How SPM Fixes It in 60 Days

Negotiate mobilization at actual cost percentage before execution. SPM reviews every demolition subcontract SOV before signing. Mobilization is renegotiated to actual cost percentage - crane setup, equipment transport, crew staging, hazmat survey abatement setup, and site establishment. The GC-preferred 6% becomes 25-30% of contract value billed at mobilization. On a $400,000 job that is $100,000-$120,000 billed in week one instead of $24,000.

Hazmat discovery notice filed within contract period. When undisclosed hazardous materials are discovered SPM files written notice to the GC within the contract notice period - typically 72 hours. Photograph documentation, abatement scope definition, and cost proposal within 48 hours of notice. Most demolition contracts allow recovery for undisclosed hazardous materials if notice requirements are met.

Tipping fees tracked by material stream as direct costs. Tipping fees for each material category - concrete, metal, wood, drywall, mixed debris - allocated to the job as direct cost codes. When tipping fee rates increase or volume exceeds estimate the variance is visible and a change order is evaluated.

FAQ

Frequently Asked Questions

How should demolition contractors structure SOV billing?

Demolition SOVs should have separate lines for: heavy equipment mobilization and crane setup at actual cost percentage (25-35% of contract value), hazmat abatement setup, structural demo by building section as milestone events, debris removal by material type, and site restoration. Each line billed at milestone completion not spread evenly across the project duration.

What are the biggest cash flow problems for demolition contractors?

Three consistent problems: mobilization billed at 5-8% when actual cost is 25-35% of job cost, hazmat discoveries not documented and billed as changed conditions, and tipping fee increases absorbed without change orders. SPM fixes all three in the first 60 days through SOV review before every contract and cost code structure for all variable costs.

Can demolition contractors recover hazmat discovery costs?

Yes - if the discovery meets the differing site conditions requirements in the contract and notice is filed within the contract period. Most demolition contracts have a differing site conditions clause that entitles the contractor to additional compensation when conditions differ materially from what the contract documents described. Most contractors never file the notice because they do not know the deadline or do not track the discovery formally.

How does mobilization affect demolition cash flow?

Mobilization is the most cash-intensive phase of demolition work and the first to occur. When it is billed at GC-preferred rates the contractor funds 20-30 percent of total job cost from operating cash before receiving significant payment. SPM negotiates mobilization billing on every demolition contract to match actual cost occurrence with billing events.

Demolition Mobilization IsYour Biggest Cash Flow Problem.