Price List


Not every project is suitable for certification. Certification requires structural drawings which adequately specify the structure and materials to be used, so that we can carry out calculations to check the suitability of the proposed structure for its intended purpose. The structure needs to be of a relatively simple form, so that the process of assessment and the results of calculations can be summarised in a 1 to 5 page certificate.

The calculations also need to be relatively simple.  For example the calculations can be punched directly into a pocket calculator without need to write anything down, and the results written directly into the certificate. The person  reviewing and approving the certificate can verify the numbers in like manner. Computers allow more complex calculations to be automated, however that does not mean that the results can be simplified and summarised in a compact and meaningful manner. Therefore there is a point at which it is more practical to document the calculation process, or provide more detailed documentation of the results.

Our typical certificate comprises of two to three tables:

  1. Resistances of the structural components (eg. Φ.Ms, Φ.Mb,Φ.V, Φ.Nt, Φ.Nc )
  2. Maximum design action-effect for each of gravity loading and wind loading. For simple structures typically only provide maximum bending moment (M), other action-effects can be determined by inspection and checked against the resistances.
  3. Connection table if direction of loading is critical, or local effects on members is more concern that capacity of fasteners.  (eg. timber, cold-formed steel, aluminium)

The basic pricing blocks for certificates, inclusive of GST are:

  1. $220 for each rectangle on plan having  a common structural form within the rectangle (comprises of no more than 2 plane frames at rights angles to one another. That is transverse framing and longitudinal framing, to resist two directions of lateral loading)
  2. $110 for each interface between rectangle, where only the connection between the two is important, or a single plane frame. {eg. 1) line where carport attached to house. 2) Gable end frame different to typical frame}
  3. $550 for each 3 dimensional structural form. (eg. pyramid  roof, or octagonal, hexagonal floor plans.)


  1. Freestanding flat carport: 1 rectangle therefore $220
  2. Flat carport attached to house 1 side: $220+$110 = $330
  3. Flat carport attached to house 2 sides: $220+2*$110=$440
  4. Freestanding gable canopy: $220
  5. Freestanding canopy with end frames different to internal frames: $220+$110=$330
  6. Freestanding Hipped Canopy: 3 rectangles (hip+internal+hip), if the hips are the same then 2*$220=$440
  7. Freestanding Gable Canopy with L-Shaped Plan: 3 rectangles (leg 1 + junction + leg 2)  3*$220=$660 or if the two legs are the same then 2*$220=$440


  1. If you cannot provide suitable structural drawings, then structural design services would be more suitable than a certificate
  2. If fee is $880 or greater no certificate provided, calculations will be documented and issued.
  3. For flat canopy minimum wind directions to consider are theta=0,180,90.
  4. For symmetrical gable canopy minimum wind directions to consider are theta=0,90
  5. When columns removed from freestanding to attach to house, it loses symmetry and minimum wind directions to check are theta=0,180,90
  6. Simple Beams are easier to check than plane frames.


ItemDescription {Refer to notes at bottom of page}Price
(includes GST)
 0Category 0 {gratis}$0.00
 1Category 1$5.50
 2Category 2 (same price as Category 1)$5.50
 3Category 3$11.00
 4Category 4$16.50
 5Category 5$22.00
 6Category 6$33.00
 7Category 7$55.00
 8Category 8$88.00
 9Category 9$137.50
 10Category 10$220.00


Level 1

ItemDescription {Refer to notes at bottom of page}Price (includes GST)
1Drawing Review and check for structural content$110
2Wind classification to AS4055 – 1 to 2 storey building.$110

Level 2

1something not yet determined$165

Level 3

1Certificate of Structural Adequacy – freestanding monoslope canopy- timber– single span (and additional constraints)$220
2 Certificate of Structural Adequacy – freestanding monoslope canopy- cold-formed steel – Single span (and additional constraints)$220
3Certificate of Structural Adequacy – freestanding gable canopy-timber – single span (and additional constraints)$220
4Certificate of Structural Adequacy – freestanding gable canopy- cold-formed steel – single Span (and additional constraints)$220
5Certificate of Structural adequacy – attachment of canopy to house$220
6Certificate of Structural Adequacy – balustrade installation$220

Level 4

1 something not yet determined $330

Level 5

1Certificate of Structural Adequacy – gable shed – cold-formed steel – single span less than 12m, (and additional constraints)$550
2Structural Design shed – cold-formed steel – greater than 3m and less than 6m : structural drawings and calculations$550

Level 6

1Structural Design Freestanding Canopy – cold-formed steel – span less than 12m : structural drawings and calculations$880
2Structural Design shed – cold-formed steel – less than 3m : structural drawings and calculations$880
3Structural Design shed – cold-formed steel – span greater than 3m and less than 6m : structural drawings and calculations $880
4Structural Design shed – cold-formed steel – span greater than 6m and less than 9m: structural drawings and calculations $880

Level 7

1Certificate of Structural Adequacy –other$1375 minimum
2Structural Design shed – cold-formed steel – greater than 9m and less than 12m : structural drawings and calculations$1375

Level 8

1Structural Design shed – cold-formed steel – greater than 12m and less than 15m : structural drawings and calculations$2200

Level 9

1Structural Design shed – cold-formed steel – greater than 15m and less than 18m : structural drawings and calculations$3465

Level 10

1 Structural Design and documentation of Single storey building structure compatible with architectural/building design drawings $5500
2Structural Design and documentation of a structure which is not otherwise considered a building:$5500 (minimum)
3Structural Design of pre- engineered/pre-specified building system (eg. canopies, sheds, balustrades, industrial racking)$5500 (starting: minimum viable
4Custom software development for structural design of building system applications. {NB: Before software is developed the building system end-product should have been properly designed and documented.}$5500 (starting: minimum viable product)
5Integration of our structures engine with other software.$5500(minimum)


ItemDescription {Refer to notes at bottom of page}Price (includes GST)
0Minimum consulting fee$110
1Effort Level 1 ( Typically 1 hour cf approx 5 hours at federal minimum)$110
2Effort Level 2 (Typically 2 hours, cf approx 10 hours  at federal minimum)$165
3Effort Level 3 (Typically 3 hours , cf approx 15 hours at federal minimum)$220
4Effort Level 4 (Typically 5 hours, cf approx 20 hours at federal minimum)$330
5Effort Level 5 (Typically 7 hours, cf approx 30 hours at federal minimum)$550
6Effort Level 6 (Typically 10 hours, cf approx 50 hours at federal minimum)$880
7Effort Level 7 (Typically 15 hours, cf approx 80 hours at federal minimum)$1375
8Effort Level 8 (Typically 25 hours,cf approx 125 hours at federal minimum)$2200
9Effort Level 9 (Typically 35 hours,cf approx 195 hours at federal minimum)$3465
10Effort Level 10 (Typically 50 hours,cf approx 310 hours at federal minimum)$5500

NB: As noted elsewhere we don’t sell time.  The fees are derived from an upper fee limit of $5000 and then divided into 10 levels using a geometric series and rounded. The approximate hours based on Australian federal minimum rate, is provided as reference for labour cost ignoring operating cost of business.  Assuming a business has near equivalent operating costs to a person, than minimum charge out rate is twice the federal minimum rate (eg. $35.40): the upper limits of hours are thus only viable if someone else provides all the required resources. So once the actual hours for the job exceed half the maximum hours quoted above, the project becomes unviable.

The estimated typical hours are based on hourly rates which varies from $55/hour to $110/hour (inc. GST): the variation is to account for complexity and risk, and the type of work involved. The hours overlap because two projects of equal duration will have differences in complexity, risk and type of work involved.  For example two projects of equal duration will have different fees if one project has more drafting time, whilst the other has more calculation (“engineering”) time: assuming drafting costs less than “engineering”. Based on distribution of time, an average rate can be determined for the project. Two projects of equal duration and only involving calculation, will have different fees based on complexity and risk. With respect to risk, we assume most of our projects are relatively low risk, with the projects being established technologies for which there is an established body of scientific knowledge which can be used to ensure fitness-for-function. So complexity is the major determinant of difference: for example a flat roof carport is less complex than a gable roof carport. A free standing carport is less complex than an attached carport: for the attached carport also need to assess the house structure. The house structure is not accessible and largely unknown, and so the risk is higher.

Projects are pursued for fixed fee, and hours are irrelevant {well relevant, if time is too long, then won’t pursue similar projects again for similar fee.}.

Notes on Pricing


  1. [03/04/2016]: Original.
  2. [15/05/2016]: Changed from a list to a table.
  3. [20/05/2016]: Added some links to web store, rounded prices down to suit.
  4. [21/05/2016]: Created more product items, and linked remainder of items to webstore.
  5. [07/08/2016]: Added condition concerning shape of plan, and minimum extra fee charged.
  6. [14/08/2016]: Added links to pricing by level of effort required.
  7. [28/08/2016]: Sorted Products by level of effort and adjusted prices to suit.
  8. [17/09/2016]: Revised titles of products related to effort levels and updated links to suit.
  9. [18/09/2016]: Added Price List for Publications.
  10. [07/04/2017]: Added guideline hours
  11. [13/05/2017]: Removed notes to another page.
  12. [29/10/2017]: Modified hourly guidelines
  13. [06/01/2019]: Converted to gutenberg block editor
  14. [03/03/2019]: Increased number of ranges for sheds