What should be included on a Canadian construction change order form?

A construction change order in Canada should include the Change Order number, date, project name, a detailed description of the added or deducted scope of work, the schedule impact in working days, the original contract sum, the sum of previous approved change orders, the net pre-tax amount of the current change order, the new revised contract value, applicable GST/HST, statutory holdback impact, and authorized signatures from both the contractor and the owner.

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Free Construction Change Order Generator PDF (Canada)

Document scope additions, site extras, or credits before work proceeds. Automatically recalculate revised contract value, statutory holdback impact, GST/HST, schedule extension days, and export a signature-ready Change Order PDF.

1. Change Order Scope & Contract Ledger

Change Order #

Issue Date

Schedule Impact (Days)

Contractor Legal Name

CRA GST/HST Registration #

Client / Owner Name

Project Name & Site

Reason / Title of Change

Detailed Description of Work, Materials & Labour Breakdown

Original Contract ($)

Previous COs Total ($)

This Change Order ($)

Provincial Tax Rate (%)

Holdback Rate (%)

Show Holdback Impact

CONSTRUCTION CHANGE ORDER AUTHORIZATION

Apex Structural & General Contracting Ltd.

CRA GST/HST No: 84920 1142 RT0001

CO-2026-003

Date: 2026-10-29

Schedule Impact: +3 Working Days

Project / SiteBow Valley Commercial Centre — Bldg B

Owner / ClientBow Valley Holdings Inc.

Scope of Change: Owner-Requested Scope Addition & Unforeseen Subgrade Rock

1. Excavate and remove 42 m³ of unforeseen sandstone bedrock along West foundation grid B1–B5 (+ $4,800.00). 2. Supply and install 4 additional structural precast wall embeds and weld plates per Structural Revision S-04 (+ $3,650.00). 3. Includes crane standby, labour, and engineering field inspection.

Contract Value Summary (Pre-Tax CAD)

Original Base Contract Sum	$320,000.00 CAD
Net Change by Previously Authorized Change Orders	$14,500.00 CAD
Contract Value Prior to This Change Order	$334,500.00 CAD
Amount of This Change Order (CO-2026-003) — Pre-Tax	+ $8,450.00 CAD
NEW REVISED CONTRACT VALUE (PRE-TAX)	$342,950.00 CAD

Tax on This CO (5%)$422.50 CAD

This CO Total (Incl. Tax)$8,872.50 CAD

Holdback (10%) / Net Draw$845.00 CAD / $7,605.00 CAD

Authorized by Contractor (Apex Structural & General Contracting Ltd.)

Signature, Name & Date

Accepted & Approved by Owner/Client (Bow Valley Holdings Inc.)

Signature, Name & Date

Generated by Alberta Studio — Free Tools · albertastudio.devFor informational purposes only · Retain signed copy

Export Change Order PDF for Client Signature

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Disclaimer: Provided for informational purposes only and does not constitute legal advice. Ensure change order notice procedures comply with your prime contract (e.g., CCDC 2) and provincial prompt payment laws.