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Certification support for your projects - Brisbane and beyond


Growing from a family owned company, Building Approvals and Advice (BA&A) is committed to providing safer homes for South East Queensland. We specialise in Form 21s and Form 17s in the Brisbane region and surrounding councils. Our role is to act in the public interest, ensuring that building work complies with all National Construction Code (NCC), Queensland Development Code (QDC) and Australian Standards (AS). Click here for more information on the certifier's role.

Simplify your Class 1a and Class 10 residential certification. 

Click here to learn more about what triggers a building approval in Queensland. 

As industry experts, we partner with industry professionals such as:  

  • Building designers 

  • Builders 

  • Architects 

  • Engineers 

  • Town Planners 


Due to the complexity of the NCC, we don't have  capacity to take on Owner Builder projects. BA&A does not certify pre existing work. We can not provide retrospective certification. 



Awarded Building Certification Team of the Year 2016, 2017, 2018, 2019, 2021, 2022 by the Royal Institute of Chartered Surveyors (RICS), our team is passionate about collaboration in the construction industry. We  keep our clients up to date with the constant changes by:

Certification process

The approvals process can be complicated, so we've simplified it below. Not every approval will follow this process exactly, but it should apply to the majority.

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Support from the early stages - experienced certifiers

Education - stay informed about industry updates

Excellent services - meet your deadlines

Innovative technology - supports  streamlined communication

Additional Services

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BA&A values
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We work efficiently and professionally.


We work collaboratively towards mutually beneficial solutions.


Act ethically every time. We mean what we say, and we follow through on our promises.


We communicate clearly and regularly. We are open and honest with all stakeholders.


We respect the knowledge of our clients. Fair and courteous treatment of others is at the center of our business practice.


Our Certifiers


Michael Tyrrell
Director, Building Certifier 
QBCC: A1197850
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With 20 years of experience in the construction industry as a Structural Engineer and Building Certifier, Michael has been the Director of Building Approvals and Advice for 10 years. He is proud to coordinate the friendly team at BA&A. Michael's experience in the industry extends from underpinning and renovations, to new dwellings and house demolitions. Whether the job is big or small, building safety is his priority.

Michael Leahy
Building Certifier - Level 3
QBCC: A1233988
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Specialising in residential, pool and pool barrier certification, Michael Leahy has been ensuring safe and compliant projects for the best part of a decade. Awarded National Pool Barrier inspector of the year 2022 by Spasa Australia, Michael has an in-depth knowledge of the QDC MP3.4 and swimming pool  barrier requirements. 

With a talent for helping to find solutions for challenging sites and a range of residential projects, Michael works closely with industry professionals and builders. He is passionate about helping to ensure projects meet the required local, state or national legislation. 

Rose Ramya Sekar
Building Certifier - Level 3

QBCC: A15264945
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With an engineering background, special interest in pool safety and broad certification experience, Rose is knowledgeable member of the BA&A team. She ensures the certification process for residential and pool projects runs smoothly. Clients love Rose’s ability to simplify the complex and her supportive approach.

Mitchell Walsh
Building Certifier - Level 3
QBCC: A1234070
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Mitchell is our resident residential expert. He has worked with BA&A for a number of years and with a finger on the pulse for industry updates, is a great help to all his clients. He enjoys seeing Brisbane and its surrounds grow and develop and is proud to be a part of that process.

Sean Davis
Building Certifier- Level 3

QBCC: A15122456
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Supporting construction industry professionals to deliver safe building work is a passion for Sean. With a project management, defence and construction background, Sean works closely with both the BA&A residential and pool teams. He’s often found on-site, completing final inspections. When in the office, Sean is busy issuing Form 17 s and Form 21s to applicants and ensuring assessments and approvals are running smoothly. 

Alex Cross
Cadet Certifier
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While completing additional study, Alex supports our team of certifiers with elements of the residential building approval process. Clients might chat with Alex in relation to quotes, siting variation applications, and council/documentation requirements.

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