How a New Zealand Sale and Purchase Agreement Works
A Sale and Purchase Agreement (often shortened to an S&P Agreement) is the written legal contract used to buy and sell residential property in New Zealand, most commonly prepared on the standard form published jointly by the Real Estate Institute of New Zealand (REINZ) and The Law Association of New Zealand (TLANZ, formerly ADLS).
Unlike putting in a casual verbal expression of interest, signing a Sale and Purchase Agreement is a formal legal step. Once both you (the purchaser) and the seller (the vendor) have signed the document, you have a legally binding contract. From that moment, you can only cancel the purchase if one of the written conditions included in your offer (such as finance, a building inspection, a council LIM check, or a custom due-diligence clause) genuinely cannot be satisfied by its due date.
Before you sign an offer, use the interactive walkthrough above alongside our Borrowing Power Calculator and NZ Mortgage & Property Glossary to prepare your questions for your property solicitor and mortgage adviser.
How Your Offer Changes Across NZ Sale Methods
While the core clauses stay largely the same, how you structure your conditions, deposit, and price depends on how the property is being sold:
Price by Negotiation or Asking Price
You can submit a conditional offer at any time. The vendor can accept your offer, decline it, or send it back as a counter-offer with changes to the price, settlement date, or condition timeframes crossed out and initialled until both sides agree on the exact same terms.
Deadline Sale
All buyers submit their offers on or before a set deadline date (unless the listing states "unless sold prior", meaning the vendor can accept an early offer). Because Deadline Sales frequently turn into multi-offer situations, talk to your mortgage adviser early so we can check the property disclosures and confirm the shortest safe finance timeframe for your situation without removing vital protections.
Sale by Tender
Tenders use a formal Tender contract pack rather than the standard private-treaty front page. Offers are submitted in confidence by a strict closing time, and tender rules vary on how and when the contract deposit must be paid. Always send tender documents to your solicitor well ahead of tender day so any amendments or KiwiSaver deposit-timing clauses are drafted properly.
Multi-Offer Situations
If another buyer submits an offer on a house at the same time as you, the real estate agent must run a formal multi-offer process and ask every buyer to sign a Multi-Offer Acknowledgement form. Because the seller can pick one offer outright without negotiating back and forth, you need to put forward your strongest realistic price and cleanest safe conditions upfront. Read our guide on how to work out what a house is worth when there is no asking price before setting your walk-away limit.
Buying at Auction
Auction contracts are unconditional the moment the auctioneer's hammer falls. You cannot add finance, building inspection, LIM, or KiwiSaver timing conditions after winning an auction, and a 10% cash deposit is normally payable immediately on auction day unless your solicitor arranges a signed variation with the vendor beforehand. Every legal check, building inspection, insurance confirmation, and property-specific bank approval must be finished before you bid. Read our full guide on buying at auction and preparing your finances for the hammer.
Who Checks What Before You Sign?
Buying safely in New Zealand is a three-way team effort, and knowing who handles each part saves delays once your working-day clock starts ticking:
- Your NZ Property Solicitor or Licensed Conveyancer: Reviews the actual contract wording before you sign, checks the LINZ Record of Title (freehold, cross-lease, unit title, or leasehold), reviews easements, covenants, and the council LIM, drafts custom Further Terms (such as a 10-working-day KiwiSaver stakeholder deposit clause or a broad due-diligence clause), and sends formal condition notices to the vendor's lawyer.
- Your Mortgage Adviser (Home Loan Factory): Verifies your borrowing limit, checks how much accessible cash versus KiwiSaver you hold for the upfront contract deposit, submits agent disclosures, LIMs, and builder's reports to your lender, orders any required Registered Panel Valuation through the bank's portal, and confirms in writing when your finance condition is unconditionally approved.
- You (The Buyer): Check that all movable items you expect to stay with the house (curtains, blinds, dishwasher, stove, heat pump remotes, garage openers) are written into the Chattels schedule, line up full-replacement house insurance from settlement day, and complete a pre-settlement walk-through inspection with the real estate agent two to three working days before settlement.