Wind zone and wind rating for any Australian address.

Runs the moment the property is confirmedThe point is placed in its national wind region, which sets the base gust speed. Near a region boundary the result says so.

Read from the land around the point, not a guessSuburban streets come back TC3, acreage TC2.5, open country TC2, read from the lots around the site.

Same reading, different questionFull shielding needs rows of buildings around the site, partial is some houses nearby, none is open on all sides.

Read from the ground itselfThe rise of the land through the site is measured; flat ground under about 1 in 20 comes back T0, a hilltop climbs the classes.

Every check, signed inInside a mapped bushfire prone area the check gives the indicative level for the point, as per AS 3959 and the rules of that state, and the bands by distance so you can see what moving the build would change. Outside one, bushfire is not part of the check.

Every check, signed inThe distance to the shore and the kind of water there give the category and the NCC durability environment, as per AS 4312 and the code.

Printed with every resultThe class is determined under AS 4055:2021; the design gust, the serviceability speed and the pressure are printed beside it so an engineer working to AS/NZS 1170.2 can pick up where the class stops.

The wind region map in the wind loading standard, AS/NZS 1170.2:2021, which splits the country into wind regions A to D that builders often call wind zones. Region A covers most of the country, region B the bands between it and the cyclonic coast, and the cyclonic regions C and D run along the northern coast from Queensland to Western Australia.

The check above names it as soon as the property is found, read at the property rather than off the national map, which matters near a region line. The wind region check reads the region alone for any address.

A wind rating is the wind class a house, shed, patio or carport is designed for: N1 to N6 outside the cyclonic regions and C1 to C4 inside them, rising as the wind load rises. The class for one property comes from its region and the terrain, shielding and slope around it, so two lots in one street can land on different classes. The post on the wind zone map covers what each class means.

The class of the site where it stands. Kits are engineered for a wind class, and the supplier asks for it before pricing one, because a higher class means heavier members, more fixings and bigger footings.

No. It is an indicative classification. Your certifier or engineer confirms it when they sign the structure.

One property, one payment. It stays unlocked on your account, and the class prints on any site plan you draw for it.

There are no change-of-mind refunds once the result is shown. If no class can be returned, you are not charged.

No. Site exposure checks are unlimited on professional and organisation subscriptions.

The class is read from mapped data rather than a site visit. Every input is shown with the result.

This page classifies the whole property. Per-structure classes live in the site plan editor.