Collateral warranty

A separate contract in which you promise a third party, such as a funder or a tenant, that you have met your contract duties.

by Jack Butler-Kettle · About 2 min readShare

Further detail

A collateral warranty creates a contractual relationship with someone outside the original contract, such as a tenant or funder. It may cover design or workmanship duties, assignment and other rights. Its wording can affect the duration and extent of exposure, so it should be read with the subcontract.

Check consistency, liability limits and insurance with appropriate advisers. A Construction contract review before signing can identify commercial differences requiring specialist legal attention.

Contract and security document register

Obtain authorised documents from the publisher or relevant party. Use the register to track them; it does not reproduce or supply a standard contract.

Download blank Excel workbook

Free blank template for your own project. The completed example is shown below. No email address required.

View the completed example

Completed fictional example

Westhaven refurbishment · 14 October 2026 · Version 1.0

Contract and security document register

Scroll across if needed to read the whole record. A dash means no value has been entered.

Contract and security document register: completed fictional example
Document	Form / edition	Parties / beneficiary	Execution / expiry	Review question	Source / status
Main contract	Selected JCT form and edition to be confirmed	Employer / contractor	Signed copy required	Check particulars, amendments and incorporated documents	Obtain licensed copy from JCT
Collateral warranty	Project-specific agreed draft	Subcontractor / named beneficiary	Execution pending	Check duty, liability limit, assignment and step-in provisions	Obtain agreed draft from project team
Performance bond	Bond provider draft	Contractor / employer	Expiry and claim conditions to be verified	Check trigger, amount and required demand documents	Obtain provider-issued instrument

The download is an original document-control register. Copyright standard contracts, warranties and bonds must be obtained through authorised sources and reviewed for the project.

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