Drawing Revision Intelligence

Every drawing revision is a financial event. The ones you miss cost you money.

SmartOverlay compares any two construction drawings and highlights every change in seconds—so you catch every variation, claim what you’re entitled to, and never build changes for free.

✓ No credit card required✓ 60-second setup✓ PDF drawing support
SmartOverlay compares old and new drawing revisions, highlighting removed, added, and changed elements
I am a...
SubcontractorBuilderProject ManagerQuantity SurveyorCertifierConsultant
The Hidden Cost

What happens when a drawing change goes unnoticed?

Every undetected revision creates a cascade of financial, contractual, and operational failures that compound across the project.

$5K–$50K
per missed variation
Uncompensated Work
You build the change without claiming it. Your margin absorbs the cost.
$0
recovery once time-barred
Time-Barred Claims
You miss the notification window. The variation becomes unclaimable—regardless of merit.
3–5×
original cost
Rework on Site
The site team builds to the old revision. Rework costs 3–5× the original scope.
Weeks
of delay
Procurement Waste
Materials ordered to the old drawing. Returns, re-orders, and storage compound the loss.
How It Works

Three steps. Every change found.

1
Upload your PDF drawings
Drag and drop the original and revised PDF versions. Supports individual sheets or full drawing packs.
2
SmartOverlay compares them
Drawings are greyscaled for clarity, then every element is analysed across both revisions to identify all differences.
3
See every change highlighted
Changes are colour-coded and numbered. Export or share the comparison instantly.
7 changes detected in 4.2 seconds
Built For Your Role

How SmartOverlay helps you

Your expertise tells you what the changes mean. SmartOverlay ensures you see them all.

Subcontractor
“How many drawing changes did you build for free last year?”
Catch every variation. Claim what you’re entitled to.
Learn how SmartOverlay helps subcontractor →
Builder
“The last time a drawing change went unnoticed on site, what did the rework cost?”
Ensure your site team builds the right scope the first time.
Learn how SmartOverlay helps builder →
Project Manager
“Your client expects you to know what changed. Do you?”
Instant visibility of design changes for confident client advisory.
Learn how SmartOverlay helps project manager →
Quantity Surveyor
“How long does the manual comparison take per variation claim?”
Verified scope changes for faster, more accurate cost assessments.
Learn how SmartOverlay helps quantity surveyor →
Certifier
“Are you certain you’re reviewing the actual changes between revisions?”
Focus your compliance review on what actually changed.
Learn how SmartOverlay helps certifier →
Consultant
“Updated drawings just arrived from the architect. What actually changed?”
See exactly what changed in seconds. Focus on coordinating the areas that matter.
Learn how SmartOverlay helps consultant →
Your Trade, Your Drawings

SmartOverlay works on your drawings.

Structural Steel
“Catch the steel change before it hits the fabrication shop.”
Member sizes revised, connection locations moved
Mechanical / HVAC
“One duct route change you miss creates three coordination clashes.”
Duct routes adjusted, plant locations relocated
Electrical
“12 extra downlights across 4 floors. Would your team catch that in a manual scan?”
Lighting layouts changed, switching reconfigured
Hydraulics
“The fixture moved 200mm. Your rough-in didn’t.”
Pipe routes adjusted, fixture locations revised
Ceilings & Partitions
“Three walls added, two removed. That’s a variation—are you claiming it?”
Wall layouts changed, bulkheads revised
Tiling
“The wet area layout changed. Your tile order didn’t.”
Tile layouts adjusted, wet area extents revised
Joinery
“The kitchen layout changed between Rev C and Rev D. Did your joiner know?”
Cabinet locations moved, configurations changed
The Comparison

Manual overlay catches some changes. SmartOverlay catches all of them.

DimensionManual ProcessSmartOverlay
Time per drawing30–60 minutesSeconds
AccuracyVaries by person and fatigueEvery change detected
ConsistencyDepends on who does itIdentical every time
ScalabilityOne drawing at a timeEntire revision set at once
Audit trailNonePermanent colour-coded record

One missed variation can cost more than a year of SmartOverlay.

A single undetected scope change on a typical construction project costs between $5,000 and $50,000 in uncompensated work. SmartOverlay costs a fraction of that. The question is not whether you can afford SmartOverlay—it’s whether you can afford to keep missing changes.

$5K–$50K
Typical cost of a single missed variation on a construction project
1
The number of caught variations it takes for SmartOverlay to pay for itself
Seconds
Time to compare two drawings and see every change highlighted
Plans & Pricing

Simple, transparent pricing

One missed variation costs more than a year of SmartOverlay. Start with a 14-day free trial — no credit card required.

Pro

For individuals managing a handful of active projects.
$59/mo
~150 sheets/month, fair use
Start free trial
  • ✓~150 sheets per month, fair use
  • ✓Colour-coded PDF overlays
  • ✓Email delivery
  • ✓Bulk pack upload
  • ✓6-month file retention
Most popular

Max

For project managers and QS teams running multiple projects.
$99/mo
~300 sheets/month, fair use
Start free trial
  • ✓~300 sheets per month, fair use
  • ✓Everything in Pro
  • ✓Priority processing
  • ✓6-month file retention
  • ✓Download packs (ZIP)

Team / Enterprise

Custom volume, API access, dedicated support, and SLA for large firms.

Let's talk

Stop leaving money on the table.
Start your free trial today.

The next drawing revision is coming. Will you catch every change?

✓ No credit card required✓ 60-second setup✓ Cancel anytime