QBCCs Interpretation

QBCC has reinforced the need to obtain a building approval when re-roofing more than 20% of your roof. It appears that there are some roofing contractors who are unaware of this requirement and are simply re-roofing houses without proper building approval which can place their QBCC licenses in jeopardy. Not to mention that the homeowner could end up with a roof that has not been lawfully approved which may affect their home insurance. 

For more information and where QBCC stands on this issue read the following – 

  1. Repair of sheet metals roofs in cyclonic areas;
  2. Ensure you meet your administrative requirements when re-roofing
  3. Rebuilding after a natural disaster
Agile Approvals Approach

Where the re-roofing works are “like for like” and in non-cyclonic areas, we take a common sense approach and our guiding principle is to ensure the homeowners are not getting a roof that is worse than what they had before. When it comes to upgrading existing tie-downs of the house we apply the following – 

  • For all existing and new tie-downs above the rafter line, it will be mandatory to upgrade the tie-downs to comply with current standards (i.e. roof battens and roof sheet fixings)
  • For all existing tie-downs below the rafter line, it will be recommended and expected that the tie-downs are strengthened to comply with current requirements as far as practical and where accessible (i.e. rafter to top plate, rafter to ridge beam, purlins to struts, struts to wall plate, creeper rafter to hip, etc) 

Every roof will be different, some will be classically pitched, others will be constructed from trusses, and some will be a combination of the two. Due to this uniqueness, the re-roofing works and strengthening of structural tie-downs will need to be specified by a structural engineer as most industry practised tie-down methods for re-roofing are outside the timber standard. The structural engineer will also ensure the tie-down details specified is in accordance with the relevant design wind speed for the area.   


What Is Required For Building Approval

If you are looking to obtain Building Approval for ‘like for like’ re-roofing works, we will need the following provided to Agile Approvals for assessing and fee quoting – 

  • An aerial plan indicating the following (we do not recommend Google Maps, instead consider Nearmaps if you have access, otherwise use Queensland Globe) –
    • Site Allotment Boundaries
    • Direction of North
    • Road Frontage
    • Site Address
    • Highlight roof area that will be re-roofed –
      • Is it a full or partial re-roof?
      • Are the lean-to structures included?
      • Are the detached sheds and carports included?
  • Existing Roof Photos
  • Roof plan indicating the following –
    • What was the existing roof constructed of and what will it be replaced with?
    • Roof Pitch
    • Roof Form
    • Existence of any box gutters
  • Scope of works indicating –
    • Brand and product name of roofing blanket proposed.
    • Whether gutters will be replaced.
    • Whether downpipes will be replaced.
    • Are metal or timber battens proposed
  • Structural details from an RPEQ registered structural engineer indicating –
    • Design wind speed – N2, N3, N4?
    • Typical tie down details with various options to achieve compliance
    • Form 15 sign off
    • Please contact Agile Approvals if you would like a referral to a structural engineer
  • DA Form 2
  • QBCC home warranty insurance payment notification
  • Other additional documents and information may be required depending on our assessment. 


What Is Required To Finalise The Building Approval

Once the Building Approval has been issued, it will allow work to commence on site. It will be up to the site supervisor to ensure the following occurs to assist in finalising the building approval in order to achieve a “Final Inspection Certificate Form 21” – 

  • Photos of completed Tie Downs. 
  • Structural Inspection by Structural Engineer and Form 16 Inspection Certificate issued
  • Photos of completed Re-Roofing
  • Scheduling a Final Inspection with Agile Approvals. This will be more of a Driveby Inspection by Agile Approvals as we will be relying heavily of the Structural Form 16.



If you are a homeowner and your roofing contractor has not included building certification costs into his quote, please feel free to call Agile Approvals and we can help advise on your next steps. If you are a roofing contractor and would like to know how you can work building certification costs into your workflows, and/or you just have a bunch of questions you want to ask, feel free to call and we will be more than happy to answer all your queries.



There are places in America where it is not required to have a building permit to start building, most of these areas are rural counties. There are places in America where there are no zoning laws, Houston Texas being the prime example.

You may be curious to know that the Australian equivalent would be the Northern Territory, go outside of a “Building Control Area” and you won’t need to worry about Building Codes, although, Planning Codes may still be applicable. If you are outside a Building Control Area in the NT, then typically you are far far away from any developed city or town. 

Fortunately or unfortunately, here in Queensland, every inch of land is governed by the Planning Act and Building Act, so Planning and Building Codes always apply… unless you’re building a tiny house on wheels… 🙂

The below video provides interesting first-hand insights from a couple of the good, the bad, and the ugly of building in an American county where there are no mandatory building codes to comply with. 

This article is written for Queensland residents…

If your garden shed has a – 

  • Plan area greater than 10m2 including any eaves and overhangs; or
  • Has a maximum height at any point above the natural ground surface greater than 2.4m; or
  • Has an average maximum height above the natural ground surface greater than 2.1m; or
  • Any side greater than 5m in length

… then a Building Approval is required.

Unfortunately, it doesn’t take much to trigger a Building Approval. 

If you require a Building Approval for your shed, please be aware that the same rigorous assessment applying to large sheds also applies to small sheds. If you have recently bought a small shed that requires a Building Approval, don’t be surprised if the costs associated with obtaining a Building Approval (i.e. structural drawings, soil report, certification fee, Council fees, etc) exceed the cost of the shed itself. I say this because many people who call in to inquire about getting a Building Approval for their small shed are truly surprised by the amount of regulation that is involved.

At the end of the day, the aim is to show your building certifier that you have a documented design that demonstrates compliance with town planning codes and building codes. Sounds easy enough, but, as always the devil is in the details. a good draftsman and structural engineer are worth there weight in gold.

If you would like to know if your shed design complies with the relevant town planning and building code laws, please feel free to call Agile Approvals for advice and assistance.  


First, follow the link below and read the article as preface to what I’m about to say – 



It’s a legitimate question. People want to know how much it’s going to cost before they commit even more time and money to get there unapproved existing carport/shed/garage/god forbid house across the line. However, unlike an actual unchanging physical product where it is easy to give an estimate of cost. A building approval, especially when it’s for an existing unapproved structure has a lot of variables to consider where one small thing/issue/non-compliance can mean thousands of dollars to rectify.  
Issuing the building approval for an existing structure is actually the easy part, the building certification cost component is small compared to the total cost of what you will have to pay to other building professionals to get it across the line. The hard part is to demonstrate to your building certifier that your existing unapproved carport/shed/garage/structure can meet today’s current town planning and building code requirements. Easier said than done.
Common issues I see when it comes to unapproved structures are – 
  1. It doesn’t meet setback or coverage requirements as per the planning scheme, thus additional relaxation approval from Council is required.
  2. It’s constructed over a planning overlay constraint (e.g. environmental overlay), thus additional approval from Council is required and a Town Planner will likely need to be engaged. 
  3. No structural drawings, thus a Structural Engineer will need to be engaged. 
  4. There are structural drawings, but the construction of it deviated from the drawings and the Structural Engineer won’t sign off on it unless significant rectification is undertaken. 
  5. It’s lined on the inside in such a way that it’s impossible to inspect the structural aspects of it. Thus, it creates more work for the structural engineer.  
  6. Downpipes are not connected to the subsoil stormwater drainage system. 
  7. No termite protection was considered.
  8. Its attached to the main dwelling, termite management was not considered and now it provides concealed entry into the main dwelling. 
  9. Fire separation was also not considered. It’s too close to the boundary and too close to the house, and now additional fire protection works are required.
  10. It is setback right on the minimum allowed, leaving no room for error. This, in turn, requires a cadastral surveyor to sign off on the siting of it, and if the survey shows it encroaches even by 1mm it technically now needs to go back to Council for a  relaxation approval. Worse case scenario – you’re on a rural property and thought you would build it right on the boundary, the surveyor shows that you’ve actually built over the boundary…
  11. It’s built too close to the underground sewer, stormwater and/or water main. Thus it will need additional approvals from the services authority for a ‘build over asset’ approval.
  12. It uses timber trusses, but the paperwork to show that it was manufactured to the correct code is lost, this requires additional work by the structural engineer to sign off on it.  
  13. It doesn’t meet the local “Amenity and Aesthetics” policy. For example, it’s too high, thus it needs additional approval from Council
  14. And here’s a big one, there is no paperwork whatsoever from any of the contractors to sign off on certain aspects of the job… 
  15. So on and so on…


You probably won’t have all the above issues to deal with, but it’s something to keep in mind because if you are going to build it and then ask for forgiveness, the homeowners I deal with can sometimes get surprised by the amount of compliance that’s involved. Not to mention the extra time and money when compared to doing it correctly in the first place. This is the risk you are playing with. 
Notwithstanding, there are a couple of exceptions to the above – 
  1. Circumstance #1 – You actually do have a building approval, but for whatever reason, you never got it finalised with the original building certifier and have since been disengaged, and for whatever reason, the original building certifier does not want to have anything to do with it – In these cases, you are actually in a much better position because at least you have the building approval to allow you to build it in the first place, which means if it wasn’t too long ago, the design of the building will still likely comply with today’s requirements.
  2. Circumstance #2 – The building or structure you built without approval is your house… ok in this situation, that’s a different ball game altogether and much more difficult to achieve post construction sign off. The building is more complex, it’s habitable which means there are more requirements to consider, and it will require a lot of invasive testing and building forensics works just to verify it’s built to code. Suffice to say this is the worst case to be in and the cost to get it across the line will be much much higher. Be prepared.   

If I haven’t scared you off, I do offer my customers the ability to just pay for a detailed assessment first. So for a much smaller commitment they can get the full picture of exactly what they need to do to get it across the line. For more information, please contact us today.

The following article is specific to Queensland Australia…

I seem to be getting a lot of enquiries of late from homeowners wanting to convert their garage into a bedroom and maybe an extra bathroom and kitchenette thrown in.

The first thing they always ask is, do I need a building approval? if so how much and how long? Well, the answer to the first question is YES, and like everything else in life the answer to the subsequent questions are… you guessed it… “it depends”.

Nothing is impossible, its just a matter of time, resources and moolah! If you are one of these homeowners wanting to make a side hustle on Airbnb… um… er… apologies, that’s a bit presumptuous of me… 🙂 perhaps you’re thinking about poor little old gran needing a place to stay and to be closer to the family so she can be better cared for. If you are indeed one of these homeowners, here is some food for thought –  

  1. Have you spoken to a Town Planner or sought preliminary advice from Council? Many town planning schemes in QLD stipulate the requirement of a covered garage or carport being provided as a minimum. If you convert it without compensating, you are now in breach of the planning scheme.
  2. If you are in one of the newer development estates. Have you spoken to the development estate managers regarding any covenants that may prohibit what you are trying to achieve? Newer estates have quite strict covenants attached, that will limit what you can and can’t do, in order to maintain a consistent aesthetic in the estate. If you do have developer covenants to adhere to, you will need their approval of your development to proceed.  
  3. Once you have the town planning sorted; and you’ve also got a developer estate covenant approval (if required), everything that applies to a Class 1a habitable room now becomes a consideration under the BCA. Easier said than done.
  4. You now need 2.4m min ceiling height, measured from the FFL. Can you achieve this?
  5. You now need to prove that a damp proof course vapour barrier was installed under your garage slab. Can you prove this? other wise a new topping slab with a vapour barrier installed may be required. Checking your existing building plans may verify this for you.
  6. If the garage is closer than 900mm off the boundary will it still comply with fire separation requirements as a Class 1a? If your existing garage wall is brick veneer and constructed so that it goes all the way to the underside of your roof covering, then no issues, if not, you may need to consider providing additional fire protection.
  7. Is the space conditioned? if not it now needs to comply with energy efficiency requirements, though the extent can be discussed and agreed upon with your building certifier.
  8. Are you in a flood area? if yes you will now need to meet the higher minimum FFL for habitable rooms.
  9. Are you in a transport noise corridor? If yes, and your house was built post 31 August 2010, you will now need to consider acoustic attenuation treatment to the external walls of this new bedroom. If you are in noise category 3 or higher, it won’t be easy to meet compliance…
  10. The new bedroom will now need to be provided with a photoelectric smoke alarm that is interconnected and hardwired to the existing smoke alarm system of the house.
  11. If your property has its own on-site sewerage system, will it cope with the new fixtures and increased occupancy? If not the system will need to be upgraded… $$ouch!!
  12. On and on…


I’ve never said it was impossible, it just depends…

If I’ve scared you away from getting a Building Approval but not from actually doing the conversion on the sly… I would highly recommend you think again. Worse case scenario, you sublet your garage as a bedroom, a fire breaks out… do you think your home insurance company won’t be asking any questions…? yikes!  


First, read thisarticle.

If your pressed for time, here’s the gist of it – 

  1. New Zealand and Canada have experienced an epidemic of leaky buildings.
  2. It’s cost NZ $23 billion dollars and counting and cost Canada over $4 billion dollars and counting
  3. The average cost in Canada per apartment was about $23K 
  4. About 80,000 NZ homes have been affected
  5. The culprit – 
    • Unwanted water penetration from poor weatherproofing of the building envelope
    • Inadequate flashings
    • Heavy reliance on sealants instead of flashing
    • Condensation forming in the interstitial spaces of the building fabric
    • Zero step down balconies
    • Compounded by poor workmanship
  6. It appears Victoria, NSW and the ACT are seeing a rise in this unfortunate phenomenon, no mention of Queensland thought, but is this more a when than an if?

Mould on Walls


My take as a building certifier

I use to provide the technical analysis and recommendation for remedial works when a home warranty insurance claim came through, this was during my time when I was working in the NT. The claims came through like clockwork, after a big storm, there was a lag of about a month before the claims from home owners and body corporates would come through for… you guess it… leaky roofs. The culprit… box gutters. Look, there’s nothing wrong with box gutters, but unless it has been designed by an engineer I think the chances are high that it’s a ticking time bomb. I’ve seen the calculations required to design a box gutter and it’s no simple arithmetic. Even when you’ve got the calculations right the engineer still has to draw the thing on paper. A properly designed and documented box gutter cannot be captured by a simple detail on the corner of the page. When it’s done properly the engineer’s details usually take the whole page or multiple pages and then it needs to be coordinated with the Architect. There was a time in the NT when box gutters were all the rage (might still be the case), it had that streamlined look that homeowners wanted so the Architects obliged. How often do you think I would see fully documented and properly designed box gutters in the building approval plans emanating from a claim?… Never. For these unfortunate homes, the typical detail I saw was basically an arrow pointing to the roof that read “Box Gutter To Comply with AS3500.3” Apparently this was all that was needed to ensure the builder and plumber knew what they were doing… right…

I learnt a few things during my time there –

1. There’s nothing wrong with simple hip/gable roof designs

2. Wide eaves are your best friend

3. Windows in single skin masonry walls are just asking for trouble

4. When the wind blows hard enough, water will run uphill

5. Removing unwanted condensation in the interstitial spaces of your building fabric is a real science.

Here at Agile Approvals, we are cognizant of the aforementioned issues, and this is where we are able to provide the kind of advice to your Architect / Design Team that you just can’t put a price on.

A few days late to this  article , it’s from the Courier Mail but it does appear the QBCC are cracking down on builders finances. The statistic that really surprised me was the number of builders in Queensland that have gone bust since the start of the year. Have a guess…5? 10? 20?… give up? It’s 30+ builders that have gone bust since the start of the year… and potentially a lot of houses, renovations, decks, carports that remain unfinished with homeowners left in the lurch.

I’m not sure where the Courier Mail got this statistic, and I have not verified it. I’m going to assume that they obtained this figure from the QBCC or somehow did some ASIC database sleuthing. I actually do wish there was a way to keep tabs on this and I do wonder if there is a way to know who is on this list of 30+ builders… but that will have to be an article for another day.   

Hope fully as a home owner, you’ve only paid up to the amount of work rendered, this doesn’t mean it’s not going to cost you more money, to the contrary, if you find yourself in this predicament, the chances are high that your builder hasn’t paid his subcontractors (including the building certifier) for the work they have done on your house. So the issue you’ll have is that the subcontractors may not be so inclined to help you finish the work if they haven’t been paid themselves.

It’s not the end of the world, but boy is it now going to cost you more time and money to have the house completed by another builder, keep all the subcontractors happy, and chase the required paperwork so that your building certifier is able to finalise the approval process so that you can lawfully occupy your own home. Not a very pleasant experience. 

In my experience as a certifier, the biggest pain point is chasing the paperwork from your subcontractors (i.e. Form 16s, Installation Certificates, etc) so that your building certifier can finalise the approval. If you find yourself in this unfortunate situation, your first call should be to the QBCC to see if there are avenues under the home warranty insurance scheme that you paid into at the time the building approval was issued. Your second call should be to the building certifier to ascertain the actual status of the building approval and the required documentation that is still outstanding that your building certifier will need a copy off in order to finalise your building approval. 

If you’re building certifier is not willing to assist or either you or your certifier have disengaged themselves from the project, feel free to contact us, no guarantees we will have an easy solution, but we are always happy to steer you in the right direction.   

unfinished house  



Agile Approvals Launch

Exciting times ahead… It’s been a wild ride for me, 15+ years in the building game from carpenter to estimator to building regulator and now building certifier. It was a long winding road, but not one without its purpose… after all those years studying the BCA it’s finally culminated in the launch of this company. I’ve worked with a number of building certifiers before, but I’ve always felt that there was much the industry needed to improve on, whether it be the user/client experience, the level or lack of customer service, the inability to fight back bad regulation, and even the snail pace uptake of technology. There was always something niggling away at me so much so that I finally made the plunge to put my money where my mouth is. So here’s a toast to Agile Approvals. 

Continue reading “Agile Approvals Launch”