Trusted by construction teams across the UK
Why variation management breaks down on most projects
These are not edge cases. They happen on almost every project managed without a structured process.
Unstructured subcontractor claims
Subcontractor variation submissions arrive with no consistent format, no supporting evidence and figures that bear no relation to the subcontract scope.
Without a structured process, every claim becomes a negotiation that takes hours to resolve.
Client variations missed in valuations
Client variations are tracked across 20 or 30 live packages in spreadsheets. Approved variations miss the next valuation and the revenue is not recovered until the final account.
By then it is a dispute rather than an admin fix.
Margin leaking between cost and recovery
The link between subcontractor cost and client recovery is managed manually, if at all. Markup calculations are done in spreadsheets.
When the connection breaks, margin leaks out and nobody notices until the final account.
How StoneRise handles variation management
A structured process on both sides of the contract, linked so every downstream cost has an upstream recovery.
Structured subcontractor submission portal
Subcontractors submit variations through a guided form that requires supporting evidence, subcontract reference and pricing breakdown. Invalid claims are filtered out before a QS reviews them.
- Mandatory supporting evidence on every submission
- Subcontract reference required before submission proceeds
- Structured pricing breakdown stops vague claims
- Filtered queue so commercial time goes on valid claims only
Subcontract reference
SC-047 — Groundworks Package
Variation description
Additional excavation depth 600mm
Supporting evidence
Drawing Rev C attached
Pricing breakdown
Labour 16hrs + plant 1 day
Outside subcontract scope
Clause 4.2 limits groundworks to original formation level. Additional excavation is a client instruction, not a subcontractor entitlement.
Pricing above agreed rates
Plant rate submitted at £380/day. Schedule of rates shows agreed rate of £290/day.
Labour hours validated
16 hours consistent with scope and schedule of rates. Approved at agreed rate.
AI variation assessment
StoneRise reviews each subcontractor submission against the subcontract documents and spec, identifies claims outside scope and flags overpriced items before commercial time is spent on them.
- Reviews claims against subcontract terms and scope
- Cross-references pricing against agreed schedule of rates
- Flags items outside entitlement with referenced reasons
- Reduces time spent on invalid claims before QS review
Upstream variation link
When a subcontractor variation is approved, StoneRise automatically generates the corresponding client variation with the correct markup applied. Every downstream cost has an upstream recovery.
- Approved downstream variation triggers upstream creation automatically
- Markup calculated and applied per contract terms
- Downstream and upstream variations linked for full audit trail
- Margin visibility on every variation, not just at final account
Downstream (Subcontractor)
VAR-SC-047-012
Additional excavation depth 600mm
Upstream (Client)
VAR-MC-012
Additional excavation depth 600mm
Complete variation register
Every variation on both sides of the contract is logged, tracked and auditable from instruction to final decision. Commercial teams have a clear position at any point in the project.
- Single register for all upstream and downstream variations
- Status tracked from instruction through to final agreement
- Full audit trail on every decision and assessment
- Clear commercial position at any point in the project
Purpose-Built for Construction
Built by QSs who ran construction businesses. Not generic software adapted for construction.
Stelios Ioannou and Michael Loizias are qualified quantity surveyors with 10 years running construction businesses before building StoneRise. StoneRise is not a generic platform with construction terminology added on top. It is built around the way commercial teams actually work.
JCT and NEC terminology built in
Contract language is native to the system. No translation needed between the software and how your team describes the work.
Variation workflows from both sides
Downstream and upstream variation workflows designed around the main contractor position. Not a generic change management tool.
AI trained on construction data
Not plug-and-play ChatGPT. A bespoke model trained on subcontract documents, specifications and construction pricing.
Qualifying main contractors get 3 months free
We are confident enough in the product to let you run it on live projects before you commit.
See StoneRise manage variations on both sides of your contracts
Qualifying main contractors get 3 months free to prove it works. Book a demo and we will show you exactly how StoneRise handles subcontractor and client variations.
- What you will see in your demo:
- Subcontractor variation submission and AI assessment
- Upstream variation generation with markup applied
- Variation register across all packages
- Audit trail from instruction to final decision
- Pricing and implementation with no surprises
Book a Free Demo
Takes 30 seconds. Confirmed within one working day.