Materials

Everything apart from the framing timber, by stage. Prices are rough Melbourne prices for late 2026. Tick things off as you get them. Ticks save on this device.

Slab $1,500–$2,250
Got it	Item	Quantity	Price
	20 mm Class 3 crushed rock (FCR)Base inside the beams. You need 0.63 m³ compacted.	1 m³ (about 2 t), delivered	$150–$260
	200 µm builder's film + 48 mm tapeUnder the slab and down into the trenches	1 roll, 4 m × 25 m	$100–$160
	SL82 reinforcing meshCut into pieces A and B (S01)	1 sheet, 6.0 × 2.4 m	$110–$160
	3-L11TM trench meshEdge beams	3 × 6 m	$120–$180
	50 mm bar chairs with bases + tie wireUnder both meshes	Bag of 50	$30–$50
	Formwork: 150 × 38 pine + pegsSlab edges, reusable	2/3.6 m, 2/3.0 m, 20 pegs, screws	$90–$160
	Concrete N25, 20 mm aggregate, 100 slumpNeeded 1.98 m³ plus 10%. Includes the short-load fee.	2.2 m³ delivered	$850–$1,150
	25 mm conduit + bend for the power entryOnly if your sparky wants it through the slab	1 length	$10–$30
	Curing: hessian or plastic, edging toolKeep the slab wet for 7 days		$40–$100

Frame timber $1,389–$1,987
Got it	Item	Quantity	Price
	90×45 MGP10 H2Studs, top plates, noggings, trimmers	25/4.8, 1/4.2, 7/2.7 m (143.1 lm)	$787–$1,145
	90×45 MGP10 H3Bottom plates (sit on the slab)	2/3.6, 2/3.0 m (13.2 lm)	$86–$119
	140×45 MGP10 H2Rafters, blocking, window lintels	7/4.8, 1/2.4 m (36.0 lm)	$360–$504
	140×45 MGP10 H3Fascia	1/3.6 m (3.6 lm)	$40–$54
	190×45 MGP10 H2Door lintel	1/4.2 m (4.2 lm)	$63–$84
	70×35 MGP10 H3Roof battens	5/3.6 m (18.0 lm)	$54–$81

Frame hardware $240–$405
Got it	Item	Quantity	Price
	M12 × 125 masonry anchor screwsBottom plates to slab	18 (16 + 2 spare)	$80–$130
	DPC strip, 110 mmUnder all bottom plates	1 roll, 20 m	$15–$30
	Galvanised framing nails, 75 × 3.05Frames and roof	2 kg (or gun nails)	$35–$60
	Framing anchors (triple-grip type)Two at every rafter-to-plate joint	30	$45–$75
	Nail platesTop plate joints at the corners	8	$10–$20
	Strap brace 30 × 0.8 + tensionersX brace on the back wall	10 m roll + 2	$35–$60
	Cut-end preservativeBrush on H3 cut ends	1 L	$20–$30

Roof $758–$1,173
Got it	Item	Quantity	Price
	Trimdek 0.42 Colorbond roof sheets17.4 lm. Light colour runs cooler. Trim the last sheet to width.	5 × 3,480	$278–$383
	Foil roof blanket, 55–60 mm (Anticon type)Under the roof sheets	1 roll, about 18 m²	$150–$230
	Flashings: high-side capping + 2 bargesFolded to suit by the supplier	1 × 3,460, 2 × 3,500	$150–$260
	115 quad gutter + 2 stop ends, outlet, 5 bracketsFront edge	1 × 3.5 m	$70–$120
	90 mm downpipe + 2 bends + clipsTo a tank or the garden, not the neighbour	3 m	$40–$70
	Roofing screws 12-11 × 50 hex with sealsColour-matched	200	$45–$70
	Neutral-cure roof sealantFlashing laps	2 tubes	$25–$40

Walls $848–$1,280
Got it	Item	Quantity	Price
	Vapour-permeable wall wrap + tapeOver the frames, under the cladding	1 roll, 1.5 × 30 m	$90–$150
	Custom Orb 0.42 Colorbond wall sheets42.3 lm. Side sheets get the rake trimmed on site.	Back 5 × 2,820; front 2 × 2,525 + 3 × 365; each side 2,821, 2,782, 2,742, 2,702	$508–$720
	Corner flashings, door and window heads, jamb trims	4 × 2,850; 1 × 1,900; 2 × 1,400; about 10 m of trim	$180–$300
	Wall screws 10-12 × 30 hex with seals + stitching screwsColour-matched	500 + 100	$70–$110

Doors and windows $580–$2,680
Got it	Item	Quantity	Price
	Pair of exterior doors in a prehung frameSecond-hand is fine. Buy before framing and check the rough opening.	2,040 × 820 leaves, frame about 1,720 wide	$250–$1,800
	Aluminium sliding windows with screensOne per side wall	2 × 600 high × 1,210 wide	$250–$700
	Lockset, 2 flush bolts, door seal, door stops		$80–$180

Insulation and lining $1,500–$2,240
Got it	Item	Quantity	Price
	R2.0 wall batts, 580 wide90 mm studs at 600	3 packs	$180–$280
	R2.5 ceiling batts, 580 wideBetween the rafters	1 pack	$70–$110
	12 mm structural ply, 2,400 × 1,200Walls. Screw anything to it.	12 sheets	$840–$1,200
	9 mm ply, 2,400 × 1,200Ceiling	4 sheets	$220–$320
	8g × 30 screws + construction adhesiveGlue and screw the ply	1,000 + 6 tubes	$70–$110
	Ply sealer or paint + exterior paintLight colour inside, fascia outside	4 L + 1 L	$120–$220

Fit-out $360–$560
Got it	Item	Quantity	Price
	Rubber stable mats 1,830 × 1,220 × 17 mmCover about 8.9 m². Rural or produce stores.	4	$360–$560

Electrical (licensed electrician) $1,500–$4,000
Got it	Item	Quantity	Price
	New circuit from the house switchboardIncludes the Certificate of Electrical Safety	Cable in conduit, 2 double power points, 2 LED battens, switch	$1,500–$4,000

Tools

Tool	Get it	For	Price
Plate compactor	Hire, 1 day	Crushed rock base	$90–$140
Bull float, edger, steel trowel	Hire the float, buy the rest	Finishing the slab	$40–$90
Framing nailer + compressor	Hire for 2 days (optional)	Frames and roof	$60–$140
SDS hammer drill + 12 mm bit	Hire or borrow	Anchor screws	$0–$80
Tin snips (left and right) or a nibbler	Buy	Colorbond. Never use a grinder.	$40–$150
Laser level	Hire or borrow (a string line and level work too)	Levels and set-out	$0–$70
Drop saw, circular saw, impact driver, drill	Own or borrow	Framing and fixing	–
Wheelbarrows × 2, shovels, rake, pegs, string line	Borrow	Digging and the pour	$0–$30
Ladders × 2 or a small scaffold	Borrow or hire	Roof	$0–$120
Pop riveter, caulking gun, chalk line, square, levels	Own or buy	Everything	$20–$60
Gloves, glasses, ear muffs, P2 masks, gumboots	Buy	Treated pine dust, concrete	$30–$70