A few years back, I sat down with an investor who’d just bought his first commercial building in Auckland. He was beaming — the numbers on the sale memorandum looked fantastic. Two months later, he called me, audibly confused. “Lo, my returns are nothing like what I expected. Where’s the money going?” Turns out, he’d bought a property on a gross lease without realising it. That one misunderstanding about his commercial lease agreement NZ structure cost him tens of thousands in unrecoverable outgoings. It’s a conversation I’ve had more times than I’d like to admit.

What Is the Difference Between Gross and Net Lease NZ?

This is probably the single most important question a commercial property investor can ask — and the one most people get wrong.

In simple terms, the lease type determines who pays the building’s operating expenses. Get this wrong, and your investment return is a fiction.

Here’s the short version:

Each structure has real implications for cash flow, property valuation, and how much admin you’re signing up for. Let me walk you through them properly.

Gross Lease vs Net Lease NZ: How They Actually Work

Gross Lease

Under a gross lease, the tenant pays a single, all-inclusive rent. The landlord absorbs every operating cost — council rates, building insurance, maintenance, property management fees, the lot.

Sounds simple, right? It is — for the tenant. For the landlord, it’s a different story.

If your insurance premium jumps 30% (which happened to plenty of building owners after the Christchurch earthquakes), that cost comes straight out of your pocket. Rates go up? Same deal. You’re carrying all the risk of cost increases, and your only remedy is the next rent review.

Gross leases are more common in smaller, single-tenancy properties — think a standalone retail shop in Hamilton or a small office in Tauranga. They’re less common in larger multi-tenanted commercial buildings, for good reason.

Net Lease

The net lease is the standard structure for most commercial property in New Zealand. Under the ADLS lease NZ — the Auckland District Law Society’s standard form of commercial lease — the default position is essentially a net lease arrangement.

The tenant pays a base rent, and then separately pays their proportionate share of the building’s operating expenses. That OPEX typically includes:

Here’s the thing most new investors miss: under a net lease, the landlord isn’t paying for property management out of their own pocket. Management fees are an OPEX cost recovered from tenants. That changes the maths significantly.

The net lease gives the landlord predictable returns because rising costs get passed through. It’s why most institutional and experienced private investors in New Zealand strongly prefer net lease structures.

Semi-Gross or Modified Gross Lease

This sits between the two. The tenant pays a fixed rental that bundles in some outgoings — often rates and insurance — while other costs like maintenance and management are charged separately.

You’ll see modified gross leases in some Wellington office buildings and older Auckland CBD properties. They can work well, but the detail matters. You need absolute clarity in the lease about which costs are included and which aren’t.

I’ve seen disputes blow up because a landlord assumed they could recover air conditioning maintenance on top of the rent, while the tenant assumed it was covered. All because the lease wording was ambiguous. Specifics matter.

The ADLS Lease NZ: The Standard You Need to Know

If you own or manage commercial property in New Zealand, you’ll almost certainly encounter the ADLS lease NZ at some point. It’s the Auckland District Law Society’s standard form Deed of Lease, and it’s the most widely used commercial lease agreement NZ template in the country.

A few things worth knowing:

If you’re buying an existing commercial property, one of the first things I’d do is check which version of the ADLS lease NZ your tenants are on — and read the further terms carefully. I’ve seen purchasers get caught out because they assumed the standard form applied unchanged.

How Lease Type Affects OPEX Recovery in Commercial Property NZ

The type of commercial lease agreement NZ you have directly determines how operating expenses flow.

Under a net lease, the landlord prepares an annual OPEX budget at the start of each financial year. Tenants pay their proportionate share monthly, based on the ratio of their leased area to the total net lettable area of the building. At year-end, there’s a reconciliation — a wash-up — to true up what was budgeted versus what was actually spent.

We manage this process for our clients using Re-Leased, which tracks every outgoing line by line and automates the reconciliation. When you’re managing a national portfolio — we look after $500M-plus in assets across 22 clients around the country — getting OPEX recovery right at scale is non-negotiable.

Under a gross lease, there’s no OPEX recovery mechanism. The landlord wears every cost. That means your annual budgeting needs to be razor-sharp, because every dollar of cost overrun reduces your return.

Under a semi-gross lease, the recovery mechanism depends entirely on what the lease says. There’s no standard — you’re relying on the specific wording of the further terms.

If you want a deeper dive on what’s included in OPEX and how recovery works, I’ve written a full guide on operating expenses in NZ commercial property that covers it in detail.

Key Clauses Every Landlord Should Understand in a Commercial Lease Agreement NZ

Regardless of whether you’re on a gross or net lease, there are several clauses in any commercial lease agreement NZ that directly affect your returns. Here are the ones I tell every investor to pay close attention to:

Rent Review Provisions

How and when the rent gets reviewed is arguably the most important clause after the rental amount itself. The main types are:

We track every rent review date across our clients’ portfolios in Re-Leased, so nothing gets missed. One late review notice and you’ve potentially lost a year’s increase.

Make Good

At lease expiry, the tenant is typically required to return the premises to their original condition. This can mean removing fitout, repainting, replacing carpet — and it applies even if the current tenant inherited the fitout from a previous assignee.

Make good disputes are one of the most common friction points between landlords and tenants. The best protection is a detailed premises condition report at lease commencement — photos, descriptions, the lot.

Assignment and Subletting

Most commercial leases require the landlord’s consent before a tenant can assign or sublet. This is your quality control. You want the right to vet any incoming tenant’s financial position before agreeing.

Under the ADLS lease, the landlord can’t unreasonably withhold consent — but “unreasonable” is doing a lot of heavy lifting in that sentence. Get good legal advice before refusing an assignment.

Maintenance Obligations

Who’s responsible for what maintenance is spelled out in the lease — but the split is often misunderstood. Generally:

The detail matters. Air conditioning, fire systems, lifts, gutter clearing, roof moss treatment — all of these need to be covered somewhere. At AssetPro, we proactively tender all maintenance contracts, appointing contractors on both price and agreed service levels, so our clients know exactly what they’re getting.

How Lease Structure Affects Property Value

Here’s something that’s easy to miss if you’re new to commercial property investment: the lease type directly affects how your property is valued.

A property on a net lease with strong OPEX recovery is valued differently from one on a gross lease. Valuers and purchasers look at the net income — what the landlord actually keeps after expenses. On a gross lease, you need to strip out all the operating costs to get there. On a net lease, the base rent is much closer to the true net income.

This is why two buildings with the same headline rent can have wildly different cap rates and investment returns. The lease structure is the hidden variable.

If you’re buying a commercial property in Auckland, Wellington, or anywhere in New Zealand, understanding the gross lease vs net lease NZ distinction isn’t academic. It’s the difference between a good investment and an expensive lesson.

Getting Your Lease Structure Right

I started this post with a story about an investor who didn’t understand his lease type. He’s not alone — I’ve seen seasoned property people trip up on the same issue.

The truth is, there’s no single “best” lease structure. A gross lease can work perfectly well for a single-tenancy property where the landlord has full control over costs. A net lease is usually better for multi-tenanted buildings where costs need to be shared fairly. And a modified gross lease can be a sensible middle ground when both parties want some simplicity with some cost pass-through.

What matters is that you understand exactly what you’ve agreed to — and that the lease documentation reflects it clearly.

If you’re looking at a new acquisition, negotiating a lease, or just trying to make sense of the one you’ve got, feel free to reach out. It’s the kind of conversation I genuinely enjoy having — and getting it right from the start saves everyone a lot of headaches down the track.

AssetPro provides commercial lease management in Auckland, Wellington and Christchurch.