Contract variations in New South Wales

What the Home Building Act 1989 (NSW) asks of a variation, and a form that follows it. Fill it in below — the document uses the NSW wording.

What the law says

Any agreement to vary a home building contract must be in writing, signed by or on behalf of each party (Schedule 2, Part 1, clause 1(2)).
That term applies to every contract covered by section 7 or 7AAA — any job over $5,000 including GST — with the exceptions in section 7AA(1A), such as a contract with a developer (Schedule 2, Part 1, clause 1(3); Home Building Regulation 2014, clause 5).
The full written-contract rules apply to contracts over $20,000 (section 7); jobs over $5,000 have their own shorter rules (section 7AAA).
The variation clause does not state when the owner gets a copy; a copy of the contract itself is due within 5 clear business days (section 7B).

Source: Home Building Act 1989 (NSW), read 27/09/2026. A summary, not legal advice.

What the document prints for NSW

This variation to the parties' building contract is put in writing and signed by or on behalf of each party, as clause 1(2) of Part 1 of Schedule 2 to the Home Building Act 1989 (NSW) requires.

The form asks for what every VaryPro document needs: the parties, the site, a description and the priced lines.

Who is sending it

State or territory of the site

Your details — the builder

Business nameABN (optional)Contractor licence no. (optional)Person signing (optional)Who signs for the business. Their name is filled in when you sign.EmailYour copy and the signed PDF come here.Phone (optional)Address (optional)

The owner — who signs it

Owner's name, or all the owners' namesPerson signing (optional)If one owner signs for all of them. It goes on the document, and their name is filled in when they sign.EmailThe signing link goes here. It must be different from yours.Phone (optional)Address (optional)

Site and contract

Project name (optional)What you both call the job. It goes first on the document.Site addressContract date (optional)Contract reference (optional)Original contract price, inc GST (optional)The price in the signed contract.Contract price before this variation, inc GST (optional)The original plus the variations signed before this one. On Variation 1 you can leave it blank.

It is a cost-plus contract

The variation

Variation numberAsked for byDate it was asked for (optional)What changes — the work added or taken outWhy it is needed (optional)

It adjusts a prime cost item or provisional sum (an allowance in the contract)

Price — amounts ex GST

Margin on the work added, % (optional)Worked out on the lines marked Add, before GST, and printed as its own line.

Net change ex GST: $0.00
GST 10%: $0.00
Total inc GST: $0.00

Payment, time and permits

When the extra is paidNever before the varied work starts.

It changes the completion dateIt needs an amended building permit, approval or plans

Substantiation

Optional. Photos of the work, quotes, dockets or drawings that back the variation — up to 10, 20 MB in all. Each goes in after the signatures as a numbered annexure: an image fitted to its page, a PDF listed with its link.

Add photos or PDFs0 of 10 · 0 KB of 20 MB

Files upload as you add them and are kept privately. If the variation isn't sent, they're deleted after a day.

Before it can be sent

Your name (the builder)
Your email address
The owner's name
The owner's email address — the signing link goes there
The site address
A description of the work added or taken out
At least one priced line

The preview is free and marked PREVIEW. Nothing is sent or stored until you sign and send it.

Sign and send

Still to fill in: Your name (the builder), and 6 more listed above.

VARYPRO

Contract variationVariation 1

Contract variation

Variation 1 to the parties' contractPreview — not sent

Builder

Name

Owner

Name

Site

Site address

State

NSW

The variation

Requested by the owner

Describe the work added or taken out

Price

Work added (+) or taken out (−)	Amount ex GST
No priced lines yet

When the change in price is paid

With the next progress claim after the varied work starts

Never before the varied work starts.

Time

No change to the completion date.

Permits and approvals

No amended building permit, approval or plans needed.

Net change (ex GST)	$0.00
GST 10%	$0.00
Total change (inc GST)	$0.00

New South Wales — the law this document follows

This variation to the parties' building contract is put in writing and signed by or on behalf of each party, as clause 1(2) of Part 1 of Schedule 2 to the Home Building Act 1989 (NSW) requires.

This records an agreement between the parties under their own contract. VaryPro prepares and delivers the document; it is not a party to it and does not give legal advice.

Signed by the builder

Signed when the document is sent

Signed by the owner

Signed when the document is sent