Building Insurance

Commercial building insurance covers the complete physical structure including foundations and substructure (concrete slabs, piles, base supports), exterior walls (brick, timber, concrete panels, cladding, insulation, structural frames), roof and ceiling systems (roofing materials, trusses, ceiling structure, waterproofing), structural floors, and windows and doors with frames, glass and fittings.

Coverage extends to permanent fixtures and fittings such as built-in cabinetry and joinery, HVAC systems, electrical systems (wiring, switchboards, light fittings), plumbing systems (pipes, sinks, toilets, water heaters), lifts and escalators, and security and fire systems (alarm panels, sensors, sprinklers, detectors). Additional structures on the property are covered including separate garages or storage sheds, carports, boundary walls, fences and gates, paved areas, exterior signs, and outdoor lighting.

Rebuilding costs coverage includes complete rebuilding at current prices, professional fees for architects, engineers and surveyors, demolition and debris removal, and building code compliance. Natural disaster coverage specific to New Zealand includes earthquake damage (shaking damage, ground movement and liquefaction, post-quake fires), flood protection (river overflow, surface water flooding, storm surge, burst water mains), fire damage (flames, heat, smoke, firefighting damage, lightning strikes), storm and weather damage (wind, hail, snow loading), and volcanic activity damage.

The cost of commercial building insurance in New Zealand is affected by multiple factors:

• Building characteristics - Age (older buildings cost more due to higher risk and potential code upgrade costs), size (larger buildings mean higher premiums), construction type (fire-resistant concrete/steel usually cheaper than timber), quality and maintenance (well-maintained buildings seen as lower risk), and special features (heritage status or unique designs increase rebuild costs)

• Location factors - Earthquake zones (high-risk zones mean significantly higher premiums), flood zones (known flood risk adds premium loading), coastal exposure (storm surge or tsunami risk adds cost), fire service access (remote locations far from fire stations increase premiums), and local crime rates (higher vandalism/arson rates bump up costs)

• Building use and occupancy - Your industry (woodworking shops have higher fire risk than offices), occupancy patterns (frequently empty buildings increase risk), tenants and their activities (relevant for multi-tenancy buildings), and vacancy (empty buildings seen as higher risk)

• Security and risk mitigation - Fire protection (sprinklers, monitored alarms, fire-rated walls), security systems (monitored alarms, CCTV, quality locks, security patrols), building management (water leak detectors, automated monitoring), structural upgrades (documented seismic strengthening), and maintenance (proof of regular preventative maintenance)

• Claims history and market conditions - Your previous claims will impact future premiums, the current insurance market cycle affects pricing, and individual insurer appetite for certain building types or locations varies

What Is Commercial Building Insurance?

Commercial building insurance is a specialised form of property insurance that protects the physical structure of a business premises. Whether you own an office block, retail store, warehouse, industrial facility, or mixed-use building, commercial building insurance is designed to cover the cost of repairing or completely rebuilding your property following damage from an insured event.

Unlike residential building insurance, commercial building policies are tailored to the unique risks and regulatory requirements associated with business properties. They account for higher rebuild costs, more complex structures, stricter building code obligations, and the absence of any government-backed natural hazard protection for commercial properties in New Zealand.

At Gerrards Insurance Brokers, we help business owners and commercial property investors across New Zealand find the right building insurance policy from our panel of 30+ A-rated insurers. We work for you — not the insurer — ensuring your coverage is comprehensive, accurately valued, and competitively priced.

What Does Commercial Building Insurance Cover?

A quality commercial building insurance policy covers far more than just the walls and roof. Here is a breakdown of the key areas of protection you can expect:

• Structural foundations and substructure: Concrete slabs, piles, base supports and ground-level footings are all covered as part of the complete structural package.
• Exterior walls and cladding: Brick, timber, concrete panels, external insulation and cladding systems (EIFS), and the structural framing behind them are protected against damage.
• Roof and ceiling systems: Roofing materials, trusses, guttering, waterproofing membranes and ceiling structures are all included.
• Windows and doors: Frames, glazing, roller doors, automatic entry systems and other openings are covered as part of the building structure.
• Permanent fixtures and fittings: Built-in joinery, HVAC systems, electrical wiring and switchboards, plumbing systems, lifts, escalators, sprinkler systems and fire alarm panels are all considered part of the building.
• Additional structures: Separate garages, storage sheds, carports, boundary walls, fences, gates, paved areas, exterior signage and outdoor lighting on the property.
• Demolition, debris removal and professional fees: In the event of a major loss, the cost of demolishing damaged structures, removing debris, and engaging architects, engineers and quantity surveyors is typically covered.
• Building code compliance upgrades: If a rebuild triggers the requirement to upgrade to current building code standards, the additional cost is covered — this is particularly relevant for older buildings.

Natural Disaster Coverage in New Zealand

New Zealand is one of the most geologically active countries in the world. Sitting on the Pacific Ring of Fire, New Zealand experiences frequent earthquakes, volcanic activity, and is exposed to severe weather events including floods, storms and cyclones. For commercial property owners, this makes robust natural disaster coverage non-negotiable.

It is critical to understand that commercial buildings in New Zealand do not receive coverage from the Natural Hazards Commission (NHC), formerly EQC. The NHC safety net applies only to residential properties. This means that as a commercial property owner, you are entirely reliant on your private insurance policy to cover damage from earthquakes, floods, landslips and other natural disasters.

Key natural disaster coverages to look for in a commercial building policy include:

• Earthquake: Shaking damage, ground movement, liquefaction and lateral spreading, and fires that break out as a consequence of an earthquake.
• Flood: River overflow, surface water flooding, storm surge, and damage from burst water mains or municipal drainage failure.
• Storm and wind: Wind damage, hail, snow loading, falling trees and branches, and damage from other windborne debris.
• Fire and lightning: Direct fire damage, heat and smoke damage, firefighting water damage, and lightning strikes.
• Volcanic activity: Ash fall, lava flow, volcanic earthquake and tsunami arising from volcanic events.

Why Commercial Building Insurance Is Essential

For most business owners, a commercial building is the single largest asset on the balance sheet. It is the physical foundation that makes trading possible. Losing it to an uninsured event — or being severely underinsured — could mean the end of the business entirely.

Here are the core reasons why adequate commercial building insurance is essential for New Zealand property owners:

• No government safety net: As noted above, commercial buildings have no NHC coverage. Every dollar of rebuild cost comes from your own pocket or your insurance policy.
• Rising construction costs: New Zealand construction costs have risen dramatically in recent years, driven by material costs, labour shortages, and supply chain pressures. A building valued several years ago may now be significantly underinsured at that same sum insured.
• Mortgage and finance requirements: Most commercial lenders will require proof of building insurance as a condition of the mortgage. Failure to maintain adequate insurance may put your financing at risk.
• Body corporate obligations: If your property is a unit title within a body corporate, the body corporate rules will typically mandate that the building is insured to full replacement value.
• Lease obligations: Many commercial leases place the responsibility for insuring the building on the landlord and may specify minimum coverage requirements.
• Business continuity: Even if you are a tenant rather than an owner, a major loss to your landlord's uninsured building could leave you without premises, affecting your own operations and income.

The Underinsurance Risk

Underinsurance is one of the most significant and most common risks facing commercial property owners in New Zealand today. It occurs when the sum insured on your policy is less than the true cost of fully rebuilding your property at current prices.

The consequences can be devastating. Many commercial building policies contain an Average Clause (also known as a co-insurance clause). Under this clause, if you are insured for only 70% of the true rebuild cost, the insurer may only pay 70% of your claim — even if the claimed amount is well within your sum insured. You effectively become a co-insurer for the shortfall.

Consider a practical example: your building has a true rebuild cost of $3 million, but you have only insured it for $2.1 million (70% of actual value). You suffer a partial loss of $500,000. Under the Average Clause, you might only receive $350,000 — 70% of your claim — leaving you to fund the remaining $150,000 out of pocket.

To avoid underinsurance, Gerrards strongly recommends:

• Obtaining a professional insurance replacement valuation from a registered valuer every 3-5 years, or after any significant renovation or extension.
• Reviewing your sum insured annually against published construction cost indices.
• Ensuring your sum insured includes all associated costs: professional fees, demolition, debris removal and code compliance upgrades — not just the bare construction cost.
• Talking to your Gerrards broker about agreed value policies or inflation protection endorsements where available.

How Gerrards Helps You Get the Right Cover

As an independent insurance broker, Gerrards works for you — not for any insurer. Our role is to understand your specific property, its risks, and your business needs, and then find the policy that provides the best combination of coverage and value from our panel of 30+ A-rated insurers.

Here is what sets Gerrards apart when it comes to commercial building insurance:

• Independent advice: We are not tied to any insurer or product. Our recommendations are based entirely on what is right for your situation.
• Access to multiple markets: We approach multiple insurers simultaneously, creating competition for your business and giving you access to a wider range of products than you could find by approaching one insurer directly.
• Expert coverage review: We scrutinise policy wordings to identify gaps, sublimits, exclusions and conditions that could affect your ability to claim when you need to most.
• Valuation guidance: We help you understand your true replacement value exposure and connect you with professional valuers where needed.
• Claims support: When disaster strikes, our team advocates on your behalf throughout the claims process, helping you achieve the best possible outcome.
• Ongoing service: Your needs change over time. We review your cover at renewal to ensure it keeps pace with changes to your building, your business and market conditions.

Commercial Building Insurance vs. Other Property Coverages

It is important to understand where commercial building insurance fits within a broader commercial insurance programme. Building insurance is specifically focused on the physical structure and permanent fittings of your property. It works alongside — but does not replace — other critical coverages:

• Contents insurance: Covers moveable assets inside the building such as office furniture, stock, equipment, machinery and IT hardware. Contents are not covered under a building policy.
• Business interruption insurance: Covers lost revenue and ongoing expenses if your business cannot operate following an insured event. Building insurance pays to rebuild the structure; business interruption insurance keeps cash flowing while the rebuild happens.
• Landlord insurance: For properties that are tenanted, landlord insurance may include additional protections such as loss of rent, tenant damage and liability — coverages that a standard building policy may not include.
• Public liability insurance: Covers your legal liability to third parties who suffer injury or property damage in connection with your property. Separate from the building structure coverage.
• Machinery breakdown insurance: For buildings with significant plant and equipment such as HVAC systems, lifts or industrial machinery, separate machinery breakdown cover may be advisable.

At Gerrards, we take a holistic view of your insurance needs, ensuring that your building policy works in harmony with your other coverages and that there are no critical gaps in your protection.

Frequently Asked Questions

Do I need commercial building insurance if I am a tenant?

If you are leasing your premises, your landlord is typically responsible for insuring the building structure. However, you should check your lease carefully — some leases require the tenant to arrange building insurance or to contribute to the cost. Regardless, you will need your own contents insurance and business interruption cover. Gerrards can help you review your lease obligations and ensure you have the right coverages in place.

How is the sum insured calculated?

The sum insured should reflect the full cost of rebuilding your property from scratch at today's construction prices, including demolition and debris removal, professional fees (architects, engineers, quantity surveyors), and the additional cost of upgrading to current building code standards. This is not the same as the market value of the property, which includes the land value. Gerrards recommends obtaining a professional insurance replacement valuation to ensure accuracy.

Are earthquake and flood covered as standard?

Most commercial building policies in New Zealand include earthquake and flood coverage, but coverage terms, sublimits and exclusions can vary significantly between insurers. Some policies may exclude certain flood types or cap earthquake payouts. Gerrards reviews these details carefully to ensure your policy provides the natural disaster protection your property genuinely needs.

What happens if my building is a heritage building?

Heritage buildings present unique insurance challenges. Rebuild costs are typically higher due to the need to source specialist materials and tradespeople. Some insurers may be reluctant to offer full replacement coverage. Gerrards has experience placing insurance for heritage and character properties and can identify insurers with appropriate appetite and expertise.

Can I insure multiple buildings under one policy?

Yes. If you own multiple commercial properties, a portfolio or blanket policy may be available, which can simplify administration and potentially offer pricing advantages. Gerrards can advise on the most appropriate structure for your property portfolio.

Get a Quote Today

Whether you own a single commercial building or a portfolio of investment properties, Gerrards Insurance Brokers has the expertise and market access to find you the right building insurance solution. Our brokers understand New Zealand's unique risk environment and the commercial property market, and we are committed to ensuring your most valuable asset is properly protected.

Contact Gerrards today for a no-obligation building insurance review and same-day quote from our panel of 30+ A-rated New Zealand insurers.