Love the sun?

Solar Panels in New Zealand: What You Need to Know Before You Install

Solar panels are becoming a popular choice for homeowners across New Zealand — and for good reason. They can help reduce power bills, improve energy independence, and make better use of your roof space.

While recent rule changes (introduced in October 2025) have made solar installations simpler, the most important thing for homeowners today is understanding what’s allowed, what still needs careful planning, and where responsibilities sit.

Here’s what you need to know before installing solar panels on your home or building.

Do You Need a Building Consent for Solar Panels?

In many cases, no building consent is required for roof-mounted solar panel arrays. This change was introduced to make solar more accessible and reduce unnecessary costs and delays.

The exemption applies to both residential and non-residential buildings, supporting wider adoption of solar energy across Aotearoa.

However, “no consent required” doesn’t mean “no rules apply.”

Key Conditions You Still Need to Meet

Even when a building consent isn’t required, solar panel installations must still comply with:

• The Building Code

• Your local District Plan

• The specific conditions of the building consent exemption

This is particularly important when it comes to structural safety and weathertightness. Solar panels add weight and wind loading to a roof, so the installation must be suitable for your building and location.

Size and Wind Zone Matter

The exemption is split into two main categories:

• Smaller solar arraysRoof-mounted solar panel arrays under 40 square metres, located in a wind zone no greater than “high”, can usually be installed without additional engineering design.

• Larger or higher-risk installationsIf the array is over 40 square metres, or your property is in a very high or extra-high wind zone, the system must be designed or reviewed by a Chartered Professional Engineer.

This helps ensure the panels are safely fixed and won’t compromise the building during severe weather.

What About Ground-Mounted Solar Panels?

The newer roof-mounted exemptions sit alongside existing exemptions for ground-mounted solar panels. Depending on size and location, some ground-mounted systems may also be installed without a building consent.

Each site is different, so it’s important to check how the exemption applies to your specific setup.

Your Responsibilities as a Building Owner

Even when using a consent exemption, the responsibility still sits with the building owner to ensure:

• The work complies with the Building Code

• The installation is structurally sound

• The roof remains weather-tight

• The project complies with local planning rules

Working with experienced professionals is key. A poorly installed solar system can lead to roof leaks, structural issues, or costly fixes down the track.

Solar Panels and Other Buildings on Your Property

Many homeowners installing solar are also thinking about sheds, garages, sleepouts, or greenhouses. Recent updates have made this easier too.

For single-storey detached buildings up to 30 square metres:

• Buildings under 10 square metres no longer have setback distance requirements

• Buildings between 10 and 30 square metres now need only a minimum 1-metre setback

These changes give homeowners more flexibility in how they use their land — but local district plan rules still apply, so it’s always worth checking before starting work.

Why Planning Still Matters

Solar panels are a long-term investment. Getting the design, placement, and installation right from the start can:

• Protect your roof and structure

• Improve performance and efficiency

• Avoid compliance issues later

• Reduce maintenance and repair costs

At Wellington Building Company, we help homeowners look at the full picture — not just what’s allowed, but what works best for your home, location, and future plans.

Want to Read the Official Guidance?

If you’d like to explore the technical details, the following resources provide official guidance and legislation:

• Schedule 1 – Building work for which building consent is not requiredlegislation.govt.nz

• Building consent exemption guidance

  • Notes for single-storey detached buildings: 2.1 to 2.5

  • Notes for solar panel arrays: 14.1 to 14.4

Solar can be

a smart move for many New Zealand homes — and with the right advice, it can also be a straightforward one. If you’re considering solar or planning other building work, we’re always happy to help you understand your options before you begin.