Building a simple stud wall is one of the more achievable DIY carpentry projects for a confident homeowner. Whether you're dividing a room, creating a wardrobe, or adding a home office nook, understanding the basics of timber framing will save you time and money — and help you get a result that's straight, solid, and up to scratch with the NZ Building Code.
Is Your Wall Load-Bearing or Non-Load-Bearing?
Before you pick up a saw, you need to determine what type of wall you're building. A non-load-bearing (partition) wall simply divides space and carries no structural load — this is what most DIY stud walls are. A load-bearing wall, by contrast, supports the weight of the structure above it.
If you're unsure, consult a qualified carpenter or structural engineer before proceeding. Removing or modifying a load-bearing wall is restricted building work under the NZ Building Code (MBIE) and requires a building consent and a Licensed Building Practitioner (LBP). This guide covers non-load-bearing partition walls only.
Do You Need a Building Consent?
In many cases, building a simple internal partition wall is exempt from building consent under Schedule 1 of the Building Act — but there are conditions. The work must not affect the structural integrity of the building, must not involve plumbing, drainage, or electrical wiring within the wall (without the appropriate licensed tradespeople), and must comply with the NZ Building Code. Check with your local council if you're unsure, or visit MBIE Building Performance for guidance on exempt building work.
Tools and Materials You'll Need
Timber
For a standard internal partition wall, use 90×45 mm H1.2 treated framing timber (sometimes called MSG8 or VSG8). Studs are typically spaced at 600 mm centres for walls lined with standard GIB plasterboard, or 400 mm centres if you need extra rigidity or are fixing heavy items. Your wall will consist of:
- Bottom plate – runs along the floor
- Top plate – fixed to the ceiling or ceiling joists
- Studs – vertical members between the plates
- Noggings – horizontal braces between studs, typically at mid-height
Other materials and tools
- Tape measure, pencil, and chalk line
- Speed square and spirit level
- Circular saw or drop saw
- Hammer or nail gun (framing nails, 90 mm)
- Power drill and screws
- Concrete anchors or dynabolts (if fixing to a concrete floor)
- String line
You'll find framing timber, fixings, and tools at Bunnings, Mitre 10, or PlaceMakers.
Step-by-Step: Framing Your Stud Wall
1. Mark Out Your Wall Position
Use a chalk line and spirit level to mark the wall position on the floor. Transfer this line up to the ceiling using a plumb bob or laser level. Double-check that your wall is square to the room.
2. Cut and Fix the Bottom Plate
Cut your bottom plate to length. Fix it to the floor along your chalk line. On a timber floor, use 90 mm framing nails or screws into the joists below. On a concrete slab, use concrete anchors or dynabolts at regular intervals (check the fixing manufacturer's recommendations for spacing).
3. Fix the Top Plate
Fix the top plate directly above the bottom plate, nailing or screwing into ceiling joists where possible. If your wall runs parallel to the joists and doesn't land on one, you may need to add blocking in the ceiling space — another reason to plan carefully.
4. Mark Stud Positions
Mark stud positions at 600 mm centres along both plates, measuring from the same end. Mark door or window openings at this stage too.
5. Cut and Install Studs
Measure the distance between the inside faces of the top and bottom plates at each stud position (walls are rarely perfectly even, so measure individually). Cut each stud to length and nail through the plates into the stud ends using skew nailing or a framing nail gun.
6. Add Noggings
Fit noggings horizontally between studs at roughly mid-height. Noggings add rigidity, provide fixing points for wall linings, and are required by NZS 3604 for compliant framing.
7. Check for Plumb and Straight
Before lining, check every stud is plumb (vertical) with a spirit level. Sight down the wall to make sure nothing is bowing. Adjust as needed.
Lining Your Stud Wall
Once the frame is complete, you can line it with GIB Standard 10 mm plasterboard for most internal walls, or GIB Aqualine for wet areas. Fix sheets vertically or horizontally per GIB's fixing instructions, using the correct screws at the recommended spacing. Finish with GIB jointing compound, tape, and a sand before painting.
Comparison: DIY vs Hiring a Carpenter
| Factor | DIY | Hire a Carpenter |
|---|---|---|
| Cost | Lower (materials only) | Higher (labour + materials) |
| Time | Longer if inexperienced | Faster, efficient |
| Quality | Variable | Consistent, professional |
| Compliance | Your responsibility | LBP can certify if needed |
| Best for | Simple partitions, confident DIYers | Structural work, complex layouts, tight deadlines |
When to Call a Professional
Call a qualified carpenter or Licensed Building Practitioner if:
- You suspect the wall may be load-bearing
- The project requires a building consent
- You need to run electrical wiring inside the wall — this is restricted electrical work and must be done by a registered electrician (EWRB)
- You need to run plumbing or drainage — this is restricted work under the Plumbers, Gasfitters and Drainlayers Board (PGDB)
- The framing involves complex angles, openings, or connections to existing structure
You can find experienced local carpenters and LBPs on tradedirectory.co.nz.
Safety Notes
- Always wear safety glasses and hearing protection when cutting timber.
- Check for existing wiring, pipes, or ducting before drilling or nailing into floors, ceilings, or existing walls — use a stud and pipe detector.
- Work with a helper when lifting long plates into position overhead.
- Keep your work area tidy to avoid trip hazards. Refer to WorkSafe NZ for general construction safety guidance.