What is the most common stud spacing in NZ homes?

The most common stud spacing in New Zealand residential framing is 400 mm centres. This suits standard sheet materials like GIB plasterboard (1200 mm wide) and meets the requirements of NZS 3604 for most wall types.

Can I use 600 mm stud spacing in my NZ home?

600 mm centres can be used for some internal non-load-bearing walls, but you need to confirm it's appropriate for your wall height, lining system, and any applicable cladding manufacturer requirements. When in doubt, 400 mm is the safer default and is more widely accepted.

Do I need a building consent to add a new internal wall?

It depends. Adding a simple non-load-bearing partition wall may not require consent in all cases, but any structural work or alteration to load-bearing elements generally does. Check with your local council or visit the MBIE Building Performance website (building.govt.nz) to confirm what applies to your project.

What is Restricted Building Work and does it affect framing?

Restricted Building Work (RBW) is work that must be carried out or supervised by a Licensed Building Practitioner (LBP). Structural framing that forms part of the primary structure of a home qualifies as RBW. This means a homeowner cannot legally do this work themselves without LBP involvement.

How do I find studs in my existing walls?

The easiest method is an electronic stud finder, available from hardware stores like Bunnings or Mitre 10. You can also tap along the wall listening for a solid sound, or measure out in 400 mm increments from a corner or door frame, as studs are typically set at regular intervals from these reference points.

Standard Stud Spacing in NZ House Framing Explained

Stud spacing is one of the most fundamental aspects of timber-framed construction in New Zealand. Whether you're renovating, adding a wall, or simply trying to understand your home's structure, knowing the standard spacing helps you make better decisions — and avoid costly mistakes.

What Is a Wall Stud?

A wall stud is a vertical timber member that forms the structural skeleton of an interior or exterior wall. Studs support the weight of the structure above, provide a fixing point for cladding and linings, and carry services like wiring and plumbing. In NZ, studs are typically 90 × 45 mm (for interior walls) or 90 × 45 mm to 140 × 45 mm (for exterior walls, depending on insulation and load requirements).

The Standard Stud Spacing in NZ

In New Zealand residential construction, the most common stud spacings are:

Spacing	Common Use
400 mm centres	Standard for most exterior and interior walls
600 mm centres	Sometimes used for interior non-load-bearing walls
450 mm centres	Less common; used in some specific design situations

The dominant standard is 400 mm centres (measured from the centre of one stud to the centre of the next). This spacing suits the most widely used sheet materials — including GIB plasterboard (1200 mm wide) — so that sheet edges always land on a stud, minimising waste and maximising structural integrity.

600 mm centres can be used for internal non-load-bearing walls in some situations, but you must confirm this is appropriate for your specific wall type, height, and cladding or lining system.

The NZ Building Code and NZS 3604

Stud spacing in New Zealand is governed primarily by NZS 3604:2011 – Timber-framed buildings, which is the key standard for light timber framing up to three storeys. This standard sets out permissible stud sizes, spacings, and fixing requirements based on factors like:

Wind zone (from Low to Very High or Extra High in exposed coastal areas)
Wall height
Load-bearing vs. non-load-bearing walls
Bracing requirements

The MBIE Building Performance website is a great starting point to understand how the NZ Building Code applies to your project. For anything structural, always refer to NZS 3604 or consult a qualified professional.

Why Stud Spacing Matters

Getting stud spacing right isn't just about following rules — it has real practical consequences:

Sheet lining alignment: GIB plasterboard and fibre-cement sheets are designed around 400 mm or 600 mm grids. Incorrect spacing means cut edges unsupported mid-span, leading to cracking.
Structural performance: Load-bearing walls must transfer roof and floor loads safely. Wrong spacing can compromise this.
Bracing: NZS 3604 specifies bracing requirements based on your wind zone. Stud spacing affects how bracing elements are positioned.
Insulation fit: Bulk insulation batts (e.g., Pink Batts or Earthwool) are sized to fit snugly between studs at standard spacings, improving your home's thermal performance as recommended by Energywise.
Fixing cladding: Exterior cladding systems from manufacturers like James Hardie specify maximum stud spacings in their installation instructions — always check these before framing.

Finding Studs in an Existing Wall

If you're working on an existing home and need to locate studs, here are a few practical methods:

Stud finder: An electronic stud finder (available from Bunnings or Mitre 10) is the easiest option.
Knock test: Tap along the wall — a solid sound indicates a stud, a hollow sound indicates a cavity.
Measure from a corner: Studs are typically set at 400 mm centres from a corner or door frame, so measuring out in multiples can help you predict locations.
Look for nail/screw patterns: In older homes, you can sometimes spot rows of fixings in the skirting board or cornice that align with studs.

Alterations and New Walls: What You Need to Know

If you're planning to add or remove walls, stud spacing is just one consideration. Here's a quick checklist:

Consent: Structural alterations generally require a building consent from your local council. Check with MBIE Building Performance if you're unsure.
Load-bearing walls: Never remove or alter a load-bearing wall without engineering advice. Identifying load-bearing walls is not always obvious.
Restricted building work: Structural framing that is part of the primary structure is classified as Restricted Building Work (RBW) under the Building Act. This must be carried out or supervised by a Licensed Building Practitioner (LBP).
Services in walls: Before cutting into any wall, check for electrical wiring, plumbing, and gas lines.

When to Call a Professional

While a confident DIYer can frame a simple non-load-bearing partition wall, there are clear situations where you should engage a qualified carpenter or builder:

Any structural or load-bearing wall work
Projects requiring building consent
Work in high wind zones where bracing calculations are critical
Removing or modifying existing framing
Any work that qualifies as Restricted Building Work

A Licensed Building Practitioner has the training and legal authority to carry out and certify structural framing work. You can find qualified local carpenters and builders on tradedirectory.co.nz.

What Is the Standard Stud Spacing in NZ House Framing?