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Capture and manage every variation from contract start to contract end

Reduce disputes, protect margins, and keep projects on schedule with one simple portal.

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Construction variation management
made simple.

Cost & Build-up

Start by building your cost breakdown in Excel. Then, add substantiation: drawings, specs, quotes, and more, directly into the claim. Finally, send your message via email using the built-in chat bar. No switching tools. No lost context. Just one seamless workflow, with every new revision and response logged.

Clients Assessment

Clients receive a secure link to the VO. No login, no friction. Every detail is laid out in one clean screen: pricing, substantiation, and program impact. Download the full package instantly. Upload your own documents to support your response and reply directly via the message bar, with every action logged for a full audit trail.

Approve and updates

Track every variation across your project in one clean view: status, value, client position, and action owner. Spot gaps, flag issues, and export reports in seconds.

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Reports

Track live variation totals, agreed values, and forecasted final accounts across all projects. Instantly spot exposure, progress, and outliers.It’s your commercial position, visualized so you can act fast and stay on top of your accounts.

Variation management for both
subcontractors and main contractors.
Two versions, one workflow.

Subcontractor and Main Contractor experiences tailored around the same single workflow - build, export, upstream and track - with all evidence and line‑item detail carried across.

Sub Contractor

Build up your bill, add substantiation and export a client‑ready package

Attach evidence: photos,
drawings and timestamps.

Line‑item build‑up in excel from
bespoke bill; quantities,
unit rates and notes.

Send-Message: Send a message as
part of the submission. All in one
place for the client.

Main Contractor

Everything Subcontractor has plus:

Import Excel descriptions and
line items into the MC build‑up
automatically.

Receive subcontractor exports
directly in the portal. Assess
directly in system.

Push accepted line items into your
valuation, edit as required and
upstream to the client.

Inter Communication Between

Sub Contractor

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Main Contractor

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Sinq Mobile Application

With the Sinq app, your operatives are able to provide feedback, changes or delays in real-time to the QS dashboard in the form of an RFI.

Sinq Mobile App

Works best for

Commercial Managers Icon

Commercial Managers - See dashboards of open variation value, time‑to‑approval, and recovered margin.

Benefit - Make faster, data-driven decisions and protect profitability.

Project Managers Icon

Quantity Surveyors - Review RFI’s from project team, build up variations, attach, substantiation and export to client. All neat and tidy ready for monthly valuation export.

Benefit - Reduce admin time and maintain a clear audit trail.

Quantity Surveyors Icon

Project Managers - Track variation status, approvals and risk in real time. Ensure site and commercial team are connected with clean flows of information.

Benefit - Keep schedules intact and avoid costly surprises.

Site Teams Icon

Site Teams - Raise queries or flag items directly to the dashboard with your phone.

Benefit - This insurers any unexpected items are immediately flagged to the office.

Programmes

Ensuring any additional time requirements are accounted for and tracked clearly against each project with every impactful variation accounted for. Avoid non compensated prelim costs through slippages by using SINQ.

Programmes Dashboard
Contract Value Dashboard
Variation Value Label

Contract Value / Variation Value

Sinq enables customers to have full visibility of the proportions of variations against the agreed contract value. Effective management of these values ensures transparency, accurate budgeting, and alignment with project objectives.