Property Law Advice and Real Estate Disputes
If you are having a legal issue involving any real estate transaction, commercial property or residential property in WA you will need advice from experienced Perth WA Property Lawyers.

If you are having a legal issue involving any real estate transaction, commercial property or residential property in WA you will need advice from experienced Perth WA Property Lawyers.
Ahern Sierakowski provides top tier services and top tier experience at substantially better rates than those of our competitors and we provide fixed fee costs wherever possible for all of our matters.
We handle dispute resolution between investors and property developers as well as claims against government, land owners and individuals.
We can also assist with preparing and lodging caveats for security.
We have specialised in contracts, default notices and property law in Western Australia for 30 years. We advise clients on leases and contracts which can usually be carried out for a fixed fee.
We often issue default notices pursuant to leases, which can also usually be carried our for a fixed fee. For 30 years in Western Australia we have specialised in default notices and debt recovery. Our clients include commercial property owners, individuals, small and large companies and some financial institutions for whom we handle their disputes over commercial leases, sale contracts, property investment syndicates and residential leases.
We provide the best legal advice on the full range of commercial property and residential property law/lease issues and disputes. We also take instructions from real estate agents for the preparation of default notices and summonses for collection of rent and evictions.
We can advise you if you are worried about a joint property investment in Western Australia with others or if you are part of a property development syndicate and have concerns about your security.
We act for builders, developers, sub-contractors, engineers and architects as well as owners of residential and commercial property on all building contract and payment disputes. We advise on all Building and Construction contracts including Australian Standards and HIA contracts.
We also handle disputes over building contract price increases for residential and commercial matters. For further information see building contracts.
We can assist you in the following areas:
Further, we can also provide you with advice on Negotiating Leases – see Negotiating Leases.
We have specialised in default notice an debt recovery for 30 years in Western Australia. Our clients include property owners, individuals, small and large companies and some financial institutions.
For litigation, our lawyers and law clerks work closely with selected commercial barristers and we also we provide alternative fee structures including fixed fees paid by instalments.
I have engaged the team at Ahern Sierakowski Lawyers & Advisors in relation to a number of property-related issues affecting my workshop and business premises.
The matters have involved neighbouring property impacts and required careful consideration of legal, regulatory, technical, and practical issues. They have been procedurally and technically complex, particularly where legal strategy has needed to be informed by engineering, regulatory, and commercial considerations.
What has stood out to me is the time and effort Katherine and her team have taken to properly understand the background to these matters. Over an extended period, they have shown persistence, attention to detail, and a genuine commitment to understanding the issues sufficiently to provide considered and practical advice.
I have appreciated their willingness to engage with difficult subject matter and to assist in progressing matters that are not straightforward. Their approach has been diligent, practical, and thoughtful throughout.
I would be pleased to recommend Ahern Sierakowski Lawyers & Advisors to others seeking legal assistance in complex property, regulatory, or commercially sensitive matters.
Katherine was an absolute lifeline during one of the most stressful periods of my life. She handled my matter with remarkable speed and precision, and from the very beginning she made me feel heard, supported, and genuinely cared for. What truly sets Katherine apart is her strength. She is fiercely strong, unwavering, and fights relentlessly for the best outcome for her clients. She fought for what was right for me and my children, and knowing she was in my corner gave me a sense of safety I hadn’t felt in a long time.
Her professionalism is exceptional, but it’s her dedication, compassion, and tenacity that make her extraordinary. I’m deeply grateful for everything she did for us, and I wouldn’t hesitate to recommend her to anyone who needs a lawyer they can trust with their life.