Construction Rework Cost Calculator
CII (Construction Industry Institute) data shows rework equals 5–12% of total construction project cost. Calculate what change orders and errors are costing your projects.
5–12%
of total project cost
CII benchmarking data shows rework costs 5–12% of total construction value in the US. A $10M project wastes $500K–$1.2M on rework alone.
30%
from design errors
CII studies attribute approximately 30% of all construction rework to design errors and omissions — the most expensive category because corrections cascade through all trades.
3–5×
ROI on BIM investment
Building Information Modelling (BIM) typically delivers 3–5× return through reduced rework, fewer RFIs, and earlier clash detection.
Construction Rework Root Causes
Based on CII RT-105 research: "Causes and Effects of Change Orders on Construction Projects."
Construction Rework Cost Components
What "rework cost" actually includes on a construction project.
Demolition and removal
Cost to demolish, remove, and dispose of work that must be redone. Often the largest single component — particularly for structural changes.
Labour to redo
Craft hours to perform the work a second (or third) time. Productivity is typically lower on rework than original work due to access constraints.
Materials and waste
New materials to replace removed work, plus disposal cost of scrapped materials. Often 30–50% of the total rework cost for material-intensive trades.
Schedule delay costs
Knock-on delay costs for downstream trades waiting on the rework. Each delay shifts the critical path and can trigger liquidated damages.
Management and supervision
Project manager, superintendent, and QA/QC time spent planning, overseeing, and inspecting rework. Often under-counted in rework estimates.
Re-inspection and testing
Third-party inspections, structural testing, commissioning re-runs. Mandatory for many rework scenarios involving regulated systems.
Frequently Asked Questions
What percentage of construction cost is rework?
The Construction Industry Institute (CII) reports that rework typically accounts for 5–12% of total construction project cost in the US. In some project types and regions, this can reach 15% or higher. Poor design documentation, scope changes, and subcontractor errors are the leading causes.
What are the main causes of rework in construction?
CII research identifies the top causes as: design errors and omissions (30%), poor communication between parties (25%), scope changes and change orders (20%), subcontractor errors (15%), and materials issues (10%). Design-related rework is the most expensive because it ripples through all subsequent work.
How do change orders contribute to construction rework cost?
Change orders are one of the largest drivers of construction rework. Every change order after the design phase can trigger demolition, rework of completed elements, procurement of new materials, schedule extensions, and delay costs for downstream trades. A change that costs $10K in the design phase can cost $100K+ if made after concrete has been poured.
How can Building Information Modelling (BIM) reduce construction rework?
BIM reduces construction rework by enabling clash detection in the digital model before construction begins. Studies show BIM can reduce RFIs (Requests for Information) by 30–40% and reduce rework costs by 5–10% of project value. The upfront modelling investment typically delivers 3–5× ROI through reduced field rework.