Property joint ventures in New Zealand: agree the risks before you buy

Before entering a property joint venture in New Zealand, agree the ownership structure, contributions, funding shortfalls, decision-making, guarantees and exit process in writing. A “50/50” understanding does not resolve those risks. Coordinate legal and tax advice before signing the purchase contract or committing to borrowing for the project.

What legal structure should a property joint venture use?

A New Zealand property project might involve co-ownership, a company, a partnership or another contractual arrangement. The structure affects ownership, authority, obligations and how the venture ends.

The Partnership Law Act 2019 defines a partnership by reference to carrying on business in common with a view to profit. Co-owning property does not, by itself, create a partnership. Equally, describing an arrangement as a joint venture does not settle every question about its legal effect. Advice needs to consider the agreement and how the parties actually operate.

Start with the planned activity: a shared long-term investment, a subdivision, a renovation for sale or an operating development business may call for different arrangements. Our commercial property and development lawyers can help assess the structure.

How should each participant’s contribution be recorded?

Cash, land, labour, professional services and guarantees are different contributions. A useful agreement explains what each participant must provide, when it is due and what they receive in return.

For example, two investors might both describe their venture as “50/50”, while one expects their deposit to be repaid before profits are split and the other expects equal repayment from the outset. Neither assumption should remain unspoken.

• Identify capital contributions, loans and any fees separately.
• Agree whether contributed work is paid for, earns an ownership interest or is included in the profit share.
• Explain how borrowing costs, holding costs and losses are allocated.
• Set a clear order for repaying debt, returning capital and distributing any surplus.

What happens if the project needs more money?

A budget should include a process for overruns and delays. Can further contributions be required? Is there a limit? What happens if one participant cannot or will not contribute?

Possible solutions need careful drafting. A further loan, a change to interests or a sale may have different commercial and legal consequences. A default provision should give the parties a workable process, rather than a surprise penalty nobody discussed.

Can a guarantee expose you beyond your ownership share?

The parties’ internal agreement does not rewrite a lender’s documents. Someone who signs a guarantee may take on exposure that is not limited to their expected share of the venture. The actual guarantee and security terms need review.

Before signing, discuss the extent of liability, whether independent advice is needed, any indemnities between participants and what is required to obtain a release. Our finance, securities and guarantees services can help clarify those obligations.

Who makes decisions and how are deadlocks resolved?

Separate everyday management from major decisions such as increasing borrowing, appointing a related-party contractor, changing the development plan or accepting a sale offer. Set spending limits and reporting requirements.

A 50/50 ownership split also needs a process for disagreement. Consider negotiation, mediation, independent determination where appropriate, and a defined exit process. Specify how values will be established and how long a buyout can take. “We will work it out later” offers little guidance once the relationship is under pressure.

What tax and ownership advice do you need before signing?

Inland Revenue treats ownership structure as important to who returns property income. Land-sale and GST rules also need specific consideration; a venture should not assume that a profit is tax-free or that every property transaction has the same GST treatment.

Coordinate legal and accounting advice before the acquisition contract is signed. If personal relationships, trusts or family contributions are involved, include those arrangements in the review as well.

How should you agree an exit from the joint venture?

The agreement should address a sale, refinancing, a participant’s death or incapacity, default and an earlier-than-expected departure. Consider information rights, valuation, sale authority and how guarantees are released. A person leaving the project may still have obligations unless the relevant parties agree otherwise.

Canterbury Legal can assist with commercial agreements and, if a disagreement has already developed, business-owner disputes. Contact our Christchurch team with the proposed project, budget, ownership details and finance terms before you commit.

What other questions do people ask?

Does co-owning property automatically create a partnership?

No. Co-ownership alone does not create a partnership. The agreement and actual activities matter, including whether the parties carry on business in common with a view to profit.

Does a 50/50 split limit my guarantee liability to half?

Not necessarily. Your internal ownership split does not rewrite a lender’s guarantee or security documents. Review the actual terms and any indemnities before signing.

Does leaving the venture release a guarantee?

Not automatically. A participant may retain obligations after leaving unless the relevant parties agree to a release. Address lender consent and guarantee releases in the exit process.

Which official sources explain these rules?

• Partnership Law Act 2019, including sections 8–14
• Inland Revenue: property ownership types
• Inland Revenue: GST when buying or selling property

Information checked on 27 October 2026. This article provides general information about New Zealand law and is not a substitute for advice about your circumstances.