Auckland · 2026 Edition

Tiled Showers in New Zealand: Do You Really Need Building Consent? (2026)

A tiled, level-entry shower sounds simple — but get the consent and waterproofing question wrong and you can void your insurance and rot your floor. Whether you need consent comes down to what you’re changing, not the tiles themselves.

Tiled showers are one of the most-wanted bathroom features and one of the most-misunderstood from a compliance angle. This guide explains when a tiled shower needs building consent in NZ, why the waterproofing rules matter so much, and how to do it right.

It’s a common question we answer for Auckland homeowners.

When you need consent

You generally need building consent for a tiled shower when the work goes beyond a like-for-like replacement — for example moving the shower or its drainage, altering plumbing, changing the room layout, or building a new wet area where there wasn’t one. These involve sanitary plumbing, drainage and new waterproofing — restricted building work that must be done by registered trades and, in most cases, consented.

When you don’t

A genuine like-for-like replacement — swapping an old shower for a new one in the same position, with no change to drainage or layout — often falls under maintenance and may not need consent. But the waterproofing and plumbing connections still have to meet the Building Code, and the safest path is to confirm with your council or builder rather than assume.

Why waterproofing is the real issue

The consent question matters because of what sits beneath the tiles: the waterproofing membrane that protects the structure. Tiles are not waterproof — the membrane is. Bad waterproofing is the leading cause of bathroom failure in NZ, and a failed tiled shower can rot framing and subfloor and, in some cases, affect an insurance claim. That’s why the rules treat it as serious work, not cosmetic.

Related: Choosing undertile waterproofing · Bathroom renovations

Level-entry showers & the granny-flat rule

A tiled, level-entry (walk-in) shower — the designer look — needs a properly detailed waterproof membrane and falls. Worth knowing: under the new 70m² granny-flat consent exemption, a tiled level-entry shower that requires a waterproof membrane is specifically excluded — those builds must use a tray. It shows how seriously the rules treat membrane wet areas.

Doing it right

• Confirm the consent position before you start.
• Use a registered plumber/drainlayer for any drainage work.
• Install a compliant membrane system to AS/NZS 4858 with correct falls and bond breakers.
• Let the membrane fully cure before tiling.
• Keep the records — they matter for insurance and resale.

Tiled shower consent FAQs

Usually yes if the work goes beyond a like-for-like replacement — moving the shower or drainage, altering plumbing, changing layout, or creating a new wet area. These involve restricted building work and new waterproofing. A genuine like-for-like swap may not, but confirm with your council.

No. Tiles and grout are not waterproof — the waterproofing membrane beneath them is what protects the structure. That’s why the membrane and its detailing are the most important part of any tiled shower, and why the work is treated as serious rather than cosmetic.

Because water passes through grout and tile joints over time. Without a correctly installed membrane and falls to the waste, that water rots the framing and subfloor and can affect insurance. Bad waterproofing is the leading cause of bathroom failure in NZ.

No. Under the new 70m² granny-flat consent exemption, a level-entry shower that requires a waterproof membrane is specifically excluded — those builds must use a tray-based shower. A tiled walk-in design would require a full building consent.

Confirm the consent position first, use registered trades for drainage, install a compliant AS/NZS 4858 membrane with correct falls and bond breakers, let it fully cure before tiling, and keep the records for insurance and resale.