Bill of materials for deck shape 402 & 402R

Design no:	402 & 402R
Sub option:	2
Pergola:	No
Length:	7.5m
Width:	4.2m
Height:	500mm

This ROBO Deck Designer makes the creation of NZ deck plan drawings a breeze. By clicking on the form controls with this website it is possible to create a working deck plan drawing of a deck within minutes with a complete list of materials. By using this service you can create a working deck drawing with limited design knowledge to the New Zealand (NZ) building code. To use the online tool the preview drawings are free, if you decide to go ahead and purchase a set of drawings the cost is from $299.00 + GST.

Timber

Timber			Bunnings		Placemakers		Mitre10		Others
Description	QTY	Unit	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Comments
90x45mm SG8 H3.2 Timber	141.90	M	10.88	1543.87	POA						5% wastage included
140x45mm SG8 H3.2 Timber	7.88	M	12.17	95.90	POA						5% wastage included
300x50mm SG8 H4 Timber	14.96	M	37.89	566.83							5% wastage included
45x45mm H3.2 Gauged Timber	2.55	M	4.32	11.02	POA		5.74	14.64			5% wastage included
24x24mm H3.1 Timber	1.33	M	13.03	17.33	POA						Used in the planter box

Timber Piles

Timber Piles			Bunnings		Placemakers		Mitre10		Others
Description	QTY	Unit	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Comments
125x125x900mm H5 Timber pile	17	EA	25.24	429.08	POA		29.50	501.50
125x125x750mm H5 Timber pile	4	EA	21.04	84.16
125x125x1500mm H5 Timber pile	3	EA	42.15	126.45	POA		48.80	146.40

Decking

Decking			Bunnings		Placemakers		Mitre10		Others
Description	QTY	Unit	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Comments
90x32 H3.2 Merch grade griptread decking	551.86	M	4.33	2389.55	POA
88x21mm H3.2 Merch grade smooth decking	28.48	M	2.65	75.47

Fasteners

Fasteners			Bunnings		Placemakers		Mitre10		Others
Description	QTY	Unit	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Comments
M16 Wedge anchor for concrete fastening, SS304 min. grade	8	EA							18.40	147.20	From Read Bros.
M12x240mm Bolt and nut, SS304 min. grade	20	EA			12.90	258.00	11.56	231.20			If any of these bolts are used for attaching a deck to a dwelling, please check on the length.
M12x150mm Coach screw, SS316	17	EA	6.15	104.55			6.48	110.16
M12x75mm bolt and nut, SS316 grade	34	EA	8.03	273.02	5.01	170.34	3.85	130.90
M12x200mm Coach screw, SS316 grade	13	EA	7.58	98.54	9.84	127.92	8.00	104.00
M12x100mm Coach screw, SS316 grade	1	EA	4.83	4.83	5.18	5.18
M12 Square Washer, SS304 min. grade	105	EA	3.54	371.70	4.14	434.70	2.74	287.70
M16 Square Washer, SS316 grade	8	EA			4.14	33.12

Concrete

Concrete			Bunnings		Placemakers		Mitre10		Others
Description	QTY	Unit	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Comments
Concrete	1.47	M3							220.00	323.40	Very rough estimate. Price varies considerably depending on location and quantity

Rebar

Rebar			Bunnings		Placemakers		Mitre10		Others
Description	QTY	Unit	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Comments
D12x6M Grade 300E reinforcing bar	43.05	M	2.76	118.82	POA						5% wastage included

DPC

DPC			Bunnings		Placemakers		Mitre10		Others
Description	QTY	Unit	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Comments
150mm x 20M Damp proof course	0.63	M	2.05	1.29	2.39	1.51	2.05	1.29			5% wastage included
300mm Damp proof course	7.88	M			1.89	14.89	2.00	15.76			5% wastage included

Galvanised Nails

Galvanised Nails			Bunnings		Placemakers		Mitre10		Others
Description	QTY	Unit	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Comments
75x3.15mm Decking nails, galvanised	10.51	Kg	15.75	165.53	16.72	175.73	25.99	273.15			5% wastage included
100x4mm Nails, galvanised	1.63	Kg	11.94	19.46	15.63	25.48	11.80	19.23			5% wastage included
50x2.5mm nails, galvanised	0.27	Kg	16.90	4.56	20.30	5.48	19.00	5.13			5% wastage included
75x3.15mm Nails, galvanised	0.54	Kg	13.33	7.20	15.76	8.51	21.80	11.77			5% wastage included

Stainless Steel Nails

Stainless Steel Nails			Bunnings		Placemakers		Mitre10		Others
Description	QTY	Unit	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Comments
30x3.15mm Nails, Lumberlok, stainless steel	2.53	Kg	75.41	190.79	100.58	254.47	87.96	222.54			5% wastage included

Structural Brackets

Structural Brackets			Bunnings		Placemakers		Mitre10		Others
Description	QTY	Unit	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Comments
Bowmac BS75 stainless steel strap	17	EA	37.93	644.81	40.28	684.76	37.98	645.66

Nail Plates

Nail Plates			Bunnings		Placemakers		Mitre10		Others
Description	QTY	Unit	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Unit Cost	Ext Cost	Comments
Lumberlok sheet brace strap 200mm, stainless steel	30	EA	3.55	106.50	4.20	126.00
160mm Ceiling tie, left hand, stainless steel	72	EA	2.85	205.20			3.10	223.20
160mm Ceiling tie, right hand, stainless steel	75	EA	2.85	213.75			3.10	232.50
110x200mm Nailon plate, stainless steel	34	EA	11.45	389.30			11.78	400.52
102x180mm Nailplate, galvanised	4	EA	4.23	16.92			4.28	17.12

Lowest combined price for currently priced items: $8799.89*

This total is calculated using the lowest available price shown for each priced item in the bill of materials.Please take into considerations the following points below

Where a supplier price is shown, click on the unit cost to view more information about the product.
All prices include GST (goods and services tax at 15%).
Actual purchasing costs may be higher than the calculated material cost because some products are sold only in fixed pack sizes or quantities. For example, if nails are sold in 2 kg boxes and the calculated requirement is 5 kg, you may need to purchase 6 kg.
Post lengths are approximate. Actual requirements may vary depending on hole depth, ground levels and the finished deck height. Additional length may also be required to allow piles to be trimmed after installation.
If your design involves a pergola, extra timber has been included at the end of to allow for trimming during construction.
No allowance has been made for wastage of bolts, nuts or washers.
The concrete volume is a very rough estimate, this varies greatly on the soil type, hole size and depth.
No allowance has been made for temporary bracing or timber used to hold piles in position while concrete is being placed and cured.
When opening supplier product links, we recommend waiting at least 10 seconds between opening links from the same supplier. Opening a large number of links in quick succession may result in temporary access restrictions from the supplier's website.
No allowance has been made for post caps or post capping. These may be made from suitable leftover timber, stainless steel flashing or proprietary post caps.
Material prices last updated on Wednesday 16 September 2026.

Disclaimer: Whilst this website contains a significant amount of information on the design of decks which has been produced with the highest level of professional care, ROBO Deck Designer, ROBO Design Solutions or Paul Roberts (the developer of this website) does not accept any responsibility for the accuracy of the information on this website. This website is intended as a guide only, please refer to the New Zealand building code for the appropriate regulations.