Insurance Checks New Zealand Property Investors Should Make Before Buying Attached Homes

One of the more overlooked reasons a property deal can stall in 2026 is insurance, particularly where the property shares walls, roofing, or structural elements with another dwelling.

For years, many property investors have treated insurance as something to sort late in the process. The property stacks up, the lending is approved, legal checks are underway, and insurance gets left until just before settlement.

That is becoming harder to do.

Across New Zealand, insurers are taking a much closer look at attached homes, duplexes, cross lease properties, townhouses, and units that form part of a connected structure. What may have once been straightforward separate cover is now being assessed far more carefully where multiple dwellings rely on shared building elements.

For investors, especially in Auckland where attached housing is common, this now sits firmly inside due diligence.

Why insurers are tightening up

The reason is practical.

When two homes share a wall, roofline, foundation, or other key structural element, claims become harder to separate. One weather event, earthquake, fire, or water issue can affect more than one owner at once, and that becomes far more complex when different insurers, different policy terms, or different repair decisions are involved.

From late May 2026, updated underwriting approaches across parts of the market are making it harder for attached dwellings to remain on separate policies where structural elements are shared.

This is also influenced by how cover works through Natural Hazards Commission Toka Tū Ake, previously known as EQC, which still underpins natural hazard cover through private insurance policies.

The direction from insurers is becoming clear. If the building functions as one structure, they increasingly want it treated as one insurable risk.

Why Natural Hazards cover has sharpened insurer focus

Under the current framework, natural hazard cover still sits behind private insurance for residential property, but claims involving attached dwellings can become much harder to separate when more than one owner is affected.

Where two or more connected homes suffer damage in the same event, insurers need much clearer certainty around:

• how repair responsibility is split
• whether shared walls, roofs, or foundations are repaired consistently
• how claim costs are allocated
• whether neighbouring policies create conflicting repair outcomes

A simple example is a two unit attached property where both dwellings share one roofline. If one owner is insured separately and the other has different cover, repair decisions can quickly become uneven, even though the building itself still needs one coordinated solution.

That has pushed insurers to reduce situations where one connected building is fragmented across separate policies.

The more physically connected a property is, the more insurers now look for one practical insurance arrangement from the start.

Why this matters for investors

This is no longer just an insurance issue.

It can affect whether a deal proceeds smoothly at all.

Lenders still require full replacement insurance to be in place before settlement, and we are increasingly seeing lenders ask more questions where attached properties sit outside straightforward standalone insurance settings, particularly close to settlement.

That means buyers can get all the way through finance and legal checks, then discover cover is:

• harder to obtain
• subject to shared policy conditions
• dependent on neighbouring owners
• restricted around shared structures

That can slow settlement quickly.

Cross lease properties deserve extra attention

Cross lease remains one of the most common examples where this could catch buyers off guard.

A cross lease can look simple on title, but insurers are increasingly focused on how the building is physically configured, not just how ownership is recorded.

A two unit cross lease may still appear straightforward, but if both dwellings share one continuous roofline or a common wall, insurers may now expect a coordinated insurance approach.

That means checking:

• shared walls
• common roofing
• driveways
• retaining walls
• drainage
• neighbouring insurance arrangements

Even when ownership feels separate, the insurance risk may not be.

In practical terms, neighbour cooperation can become part of getting cover in place.

Body corporates carry their own insurance pressure

Body corporate properties have always required shared insurance, but underwriting pressure is increasing there too.

Insurers are looking more closely at:

• maintenance standards
• construction type
• previous claims
• earthquake exposure
• deferred repairs

For investors, this can mean:

• higher annual premiums
• rising body corporate levies
• unexpected special levies
• reduced buyer confidence at resale

A building that looks affordable on paper can quickly become expensive if insurance pressure is already building underneath it.

What smart investors should check before going unconditional

Before committing to any attached property, we recommend confirming:

• who currently insures the property
• whether separate cover is still available
• whether neighbouring owners are aligned on insurance
• whether there are shared structural responsibilities
• whether the title creates complications
• whether the flats plan is current for cross lease properties

This now deserves the same attention as rental yield, lending structure, and legal review.

The lending angle many buyers miss

Insurance delays often become lending delays.

Banks will not release funds without acceptable cover, and if insurance sits in a grey area, lender questions usually arrive late in the process.

Sometimes a property looks attractively priced because the insurance issue has already narrowed the buyer pool.

That can create opportunity, but only if the risk is properly understood.

The practical takeaway

In a market where lending, compliance, and insurance increasingly intersect, understanding how a property is insured is now just as important as understanding how it is valued.

For investors, especially those building or reshaping a portfolio, this check belongs right at the start.

Because if insurance becomes difficult after the offer is signed, it is often already too late to solve it easily.