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Ahern Sierakowski Lawyers | Commercial Law | Perth Law Firm WA
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Ahern Sierakowski Lawyers | Commercial Law | Perth Law Firm WA
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Aug22026

Dividing Complex Assets on Separation

Family LawBy Ahern SierakowskiAugust 2, 2026

When a relationship breaks down, property settlement is not always just about the family home. For many people, the more difficult issues sit in trusts, companies, family businesses, investments and loans between related entities.

Read more
Aug12026

Contesting a Will in WA: When is a Claim Worth Pursuing?

Estate Litigation, Family Law, Wills & Succession PlanningBy Ahern SierakowskiAugust 1, 2026
Not every disappointment with a Will is a legal claim. In Western Australia, the key question is usually whether an eligible person has been left without adequate provision — not simply whether the Will feels unfair.

Read more
Aug12026

Wills, Inheritances and Protecting the Family Fortune

UncategorizedBy Ahern SierakowskiAugust 1, 2026

Worried about the kids blowing your life’s work?

Read more
Aug12026

Your Liability and When It Ends

UncategorizedBy Ahern SierakowskiAugust 1, 2026
How long will you be liable for the debts of a company after you resign as a Director?

Read more
Aug12026

Thinking of Entering Into a Lump Sum Home Building Contract?

Building & Construction LawBy Ahern SierakowskiAugust 1, 2026

Ahern Sierakowski specialize in all contract advice, all building and construction advice, dispute resolution and litigation matters. Our clients include building and construction companies, mining services companies, property developers, contractors, subcontractors, civil contractors and suppliers in a variety of building and construction disputes.

Read more
Jul312026

Ever thought about an Enduring Power of Guardianship (EPG)?

Estate Litigation, Wills & Succession PlanningBy Ahern SierakowskiJuly 31, 2026

Why do I need an EPG?

Read more
Jul312026

What is Included in the Asset Pool? Family Trusts and Family Breakdowns

Family LawBy Ahern SierakowskiJuly 31, 2026

Family trusts can significantly impact asset division during family breakdowns, such as divorce or separation.

Read more
Jul312026

Who are the Best Divorce Lawyers in Perth Dealing with High Asset Divorces?

Family LawBy Ahern SierakowskiJuly 31, 2026
Read more
Jul312026

Want a basic run down of the Magistrates Court Civil Jurisdiction?

LitigationBy Ahern SierakowskiJuly 31, 2026

We have specialised in Magistrates Court cases for over 20 years. Further details can be read here.

Read more
Jul312026

Can you contract out of misleading or deceptive conduct?

Building & Construction Law, Contracts & Commercial Law, Corporate Law, LitigationBy Ahern SierakowskiJuly 31, 2026

Do you own a company that contracts with customers or enters into terms and conditions with customers?  A recent Supreme Court of Appeal decision found that a party cannot contract out of liability for misleading or deceptive conduct under Australian Consumer Law.

Read more
Jul312026

Why should you never ignore a Family Provision Act Claim? When a court order comes knocking.

Estate Litigation, Family LawBy Ahern SierakowskiJuly 31, 2026

A recent Supreme Court of WA judgment found a defendant was in contempt of court for ignoring orders in relation to a Family Provision Act 1972 (WA) (FPA) claim.

Read more
Jul312026

What Does a Defacto Relationship Mean For Your Finances?

Family LawBy Ahern SierakowskiJuly 31, 2026

In the realm of relationships, the legal status of “de facto” often raises questions about financial rights and responsibilities.

Read more
Jul312026

What is Divorce?

Family LawBy Ahern SierakowskiJuly 31, 2026

At Ahern Sierakowski, we understand that divorce or separation is a challenging and emotional journey.

Read more
Jul312026

What Does Divorce Mean For You As A Business Owner?

Family LawBy Ahern SierakowskiJuly 31, 2026

Whether you’re a sole proprietor, partner, or part of a closely held corporation, safeguarding your business interests during divorce proceedings requires careful planning and strategic considerations.

Read more
Jul312026

Is Mediation the Right Option For You?

Family LawBy Ahern SierakowskiJuly 31, 2026

We are dedicated to achieving swift and peaceful resolutions through mediation whenever possible.

Read more
Jul312026

What does the Legislation Update mean for Superannuation Splits?

Family LawBy Ahern SierakowskiJuly 31, 2026

At Ahern Sierakowski, we specialize in family law matters, including the division of superannuation in de facto relationships.

Read more
Jul312026

What Do You Need to Know About Custody Battles?

Family LawBy Ahern SierakowskiJuly 31, 2026

Whether you’re navigating a divorce or separation, understanding what’s involved in custody disputes is essential for advocating for your child’s best interests.

Read more
Jul312026

Is My Inheritance Part of the Asset Pool In Divorce?

Family LawBy Ahern SierakowskiJuly 31, 2026

Understanding how inheritance is treated under family law is crucial for individuals navigating divorce or separation.

Read more
Jul312026

Will I have to pay Spousal Maintenance?

Family LawBy Ahern SierakowskiJuly 31, 2026

Understanding factors involved and seeking legal advice can help navigate spousal maintenance effectively under Western Australian law.

Read more
Jul312026

My Ex Has a New Partner – Are Their Assets Included in Divorce Settlements?

Family LawBy Ahern SierakowskiJuly 31, 2026

Understanding the legal implications of a new relationship on financial matters is essential for anyone navigating divorce or separation.

Read more
Jul312026

Is A Loan From Mum and Dad Repayable During Divorce?

Family LawBy Ahern SierakowskiJuly 31, 2026

Mum and Dad Lent Us Money – Is the Loan Repayable During Divorce?

Read more
Jul312026

How Can I Protect My Assets?

Family LawBy Ahern SierakowskiJuly 31, 2026

Read more below for the Key Steps to consider.

Read more
Jul312026

What is a Binding Child Support Agreement?

Family LawBy Ahern SierakowskiJuly 31, 2026

A Binding Child Support Agreement can provide certainty and clarity regarding child support obligations, offering benefits for both parties involved.

Read more
Jul312026

Want to Avoid Prolonged Court Proceedings? Streamlining Consent Orders for Family Matters

Family LawBy Ahern SierakowskiJuly 31, 2026

At Ahern Sierakowski we can safeguard your interests and promote efficient resolution of family matters.

Read more
Jul312026

Personal Liability of Employees – Could You Be Liable?

Corporate LawBy Ahern SierakowskiJuly 31, 2026

Could you as an Employee make a mistake at work and face personal liability for your actions?

Read more
Jul312026

Retention of Title Clauses when goods are mixed – Are Your Terms and Conditions Clauses Adequate?

Corporate LawBy Ahern SierakowskiJuly 31, 2026

A retention of title clause can be a very useful tool but the terms and conditions need to be drafted properly to be enforceable.

Read more
Jul312026

Statutory Oppression Remedy Under the Corporations Act 2001 (cth) – Are You Eligible to Apply?

Corporate LawBy Ahern SierakowskiJuly 31, 2026

Are you Eligible to Apply?

Read more
Jul312026

How Will the Statute of Limitations Affect Your Cause of Action?

LitigationBy Ahern SierakowskiJuly 31, 2026

These Statutes of Limitation and Case Law demonstrate the various applications of the principle to the different areas of the law.

Read more
Jul312026

Is Your Contract Collateral Or Inconsistent?

Corporate LawBy Ahern SierakowskiJuly 31, 2026

Two requirements must be fulfilled to establish the existence of a valid and binding collateral contract.

Read more
Jul312026

Ending a Business Partnership?

Corporate LawBy Ahern SierakowskiJuly 31, 2026

Are you in the process of Ending a Business Partnership?

Read more
Jul312026

Give me an Overview of the State Administrative Tribunal

LitigationBy Ahern SierakowskiJuly 31, 2026

SAT has been created by a range of legislation which gives it jurisdiction to deal with a variety of matters.

Read more
Jul312026

Irrevocable Authorities

Debt RecoveryBy Ahern SierakowskiJuly 31, 2026

Where the relationship of principal and agent has been created by agreement, it is open to the parties to agree to terminate the relationship.

Read more
Jul312026

Have You Done Your Due Diligence for a Sale or Purchase of a Business?

Contracts & Commercial LawBy Ahern SierakowskiJuly 31, 2026

Due Diligence is the legal and commercial process of examination of a transaction, including the entities involved and the related documentation.

Read more
Jul312026

What is Defamation?

LitigationBy Ahern SierakowskiJuly 31, 2026

If you have defamed a person, you may be held liable for damages (money)

Read more
Jul312026

Applying or Opposing Freezing Orders

LitigationBy Ahern SierakowskiJuly 31, 2026

The recent Western Australian Supreme Court decision of Sayed v Hemat [2011] WASC 183 has provided some welcome clarity to the circumstances in which the Court will grant an Interim Freezing Order.

Read more
Jul312026

Need Advice on a Subject to Finance Clause?

Property LawBy Ahern SierakowskiJuly 31, 2026

The standard REIWA Contract for Sale of Land includes an optional subject to finance clause.

Read more
Jul312026

Are Your Employees Poaching Your Property Or Clients?

Corporate LawBy Ahern SierakowskiJuly 31, 2026

More and more we are advising employers on suing former employees.

Read more
Jul312026

Could your Ex Employees be Stealing Confidential Information?

Contracts & Commercial LawBy Ahern SierakowskiJuly 31, 2026

Sergey Aleynikov, a former Goldman Sachs programmer, was charged for computer theft crimes under New York state law

Read more
Jul312026

Do you Need to Register a Security Interest on the Personal Property Securities Register?

Debt RecoveryBy Ahern SierakowskiJuly 31, 2026

What is the Personal Property Securities Act and what does it do?

Read more
Jul312026

Subcontractors or Employees?

Building & Construction LawBy Ahern SierakowskiJuly 31, 2026

We have advised on and prepared sub-contracts in Perth and Western Australia for 30 years for clients in construction, mining and all other commercial areas.

Read more
Jul312026

Fixed Fees / Contracts / Advice / Litigation

Family LawBy Ahern SierakowskiJuly 31, 2026

“We have 30 years experience in pricing legal work for both sophisticated clients (financial institutions and large companies) and for smaller businesses and individuals. We work on a fixed fee for all of our contract work. For litigation we have various pricing methods including a fixed price.”

Read more
Jul312026

What is Intellectual Property?

Contracts & Commercial LawBy Ahern SierakowskiJuly 31, 2026

We can assist you in protecting your intellectual property, taking action against a party who has infringed your intellectual property or defending a claim against you for intellectual property infringement.

Read more
Jul312026

How Do I Explore Company Business Structures the pros, cons and how to set one up?

Contracts & Commercial LawBy Ahern SierakowskiJuly 31, 2026

We assist new business owners and entrepreneurs start up, manage and grow businesses, including online businesses.

Read more
Jul312026

Do You Need to Lodge Or Remove a Caveat?

Property LawBy Ahern SierakowskiJuly 31, 2026

A caveat can prevent buying, selling, registering a mortgage and other dealings.

Read more
Jul312026

Is Your Company at risk of Employee Fraud, Stealing Trade Secrets and Company Property?

Corporate LawBy Ahern SierakowskiJuly 31, 2026

Your employees’ employment contracts need to have strict clauses in them so that they are not tempted to steal company funds or  intellectual property and set up in competition to you or take them to a competitor.

Read more
Jul312026

Do Our Letters of Demand and Terms and Conditions work?

Debt RecoveryBy Ahern SierakowskiJuly 31, 2026

The quicker we act for our clients by sending letters of demand to debtors on our letterhead, the quicker our clients get paid.

Read more
Jul312026

Have You Voided a Restraint of Trade Clause?

Contracts & Commercial LawBy Ahern SierakowskiJuly 31, 2026

Employment restraints are vital for employers in order to protect their goodwill and client base developed in their business over numerous years.

Read more
Jul312026

Should you include Restraint Clauses and Non Compete Clauses in Your Agreements?

Contracts & Commercial LawBy Ahern SierakowskiJuly 31, 2026

The recent case of Habitat1 Pty Ltd v Formby [No 2] [2017] WASC 331, has provided great insight into how the law operates in relation to restraint of trade clauses.

Read more
Jul312026

Thinking of starting a business? Have you considered what business structure is right for you?

Corporate LawBy Ahern SierakowskiJuly 31, 2026

Too many people set up new businesses without carefully considering the best business structure that can be tax effective and protect assets.

Read more
Jul12026

A Post Office Will – What Could Go Wrong?

Estate Litigation, Wills & Succession PlanningBy Ahern SierakowskiJuly 1, 2026

Post office wills are notorious amongst estate practitioners for being rife with issues.

Read more
Jul12026

What are Implied Warranties?

LitigationBy Ahern SierakowskiJuly 1, 2026

No matter what the terms of your written contracts there will always be warranties about the quality of your work.

Read more
OUR SERVICES
  • Litigation
    • Breaches of contract
    • Breaches of the Competition & Consumer Act 2010
    • Business Disputes
    • Business & Company Commercial Disputes
    • Claims against auditors, directors, independent experts & professional advisors
    • Claims against insurers
    • Claims against solicitors, accountants, engineers, doctors & architects
    • Commercial Litigation
    • Copyright Breaches & Disputes
    • Court Action
    • Debt-Recovery
    • Deeds of Settlement & Release
    • Directors & Shareholder Disputes
    • Franchise Disputes
    • Insurance
    • Legal action against Borrowers & Guarantors
    • Legal Advice on insurance contracts
    • Loan Agreements & Disputes
    • Misleading & Deceptive Conduct
    • Partnership Agreements & Partnership Disputes
    • Professional indemnity insurance claims
    • State Administrative Tribunal Hearings
    • Summonses
    • Trust Disputes
  • Alternative Dispute Resolution
    • Alternative Dispute Resolution
    • Commercial Arbitration
    • Disputes & Litigation
    • Letters of Demand & Statutory Demands
    • Mediation
  • Building & Construction
    • Advice on Building Delays & Liquidated Damages
    • Building contracts
    • Building Commission claims
    • Building Contracts & Sub-Contracts
    • Building & Construction Mediations & Arbitrations
    • Commercial & Residential Building Disputes
    • Construction Contracts Act Claims
    • Disputes Concerning the Scope of Works or Standard of Works
    • Dispute Resolution
    • Home Building Contracts Act 1991
    • Legal Advice on Building, Engineering & Architectural Contracts
    • Payment Disputes
    • Preparation of variation claims
    • Town Planning Prosecutions
  • Debt Recovery
    • Acknowledgment of Debt
    • Credit Contracts & Debt Collection
  • Commercial Law & Contracts
    • Shareholder, Director & Share Sale Agreements
    • Partnership Agreements
    • Advice on Breaches of Contract
    • Advice on Commercial Contracts & Drafting
    • Advice on Commercial Terms & Conditions of Trading
    • Advice on Contracts for Mining, Energy & Resources, Building & Steelwork Industries
    • Advice on Credit Applications
    • Advice on Sale of Business Agreements & Transactional
    • Confidentiality agreements & Sale of Businesses in Western Australia
    • Deeds of charge
    • Distribution Agreements
    • Guarantees
    • Heads of Agreements, Joint Venture Agreements, ‘MOU’s’ & Terms Sheets
    • Late Delivery Claims
    • Loan Agreements
    • Loans & unpaid accounts
    • Manufacturing Agreements
    • PPSR, Mortgages, Loan Agreements & Guaranteees
    • Preparation of securities
    • Protecting Your Intellectual Property
    • Retirement Village Contracts
    • Termination of Contracts
  • Property Law
    • Building contracts
    • Caveats over properties
    • Collection of Outstanding Rent
    • Default Notices on leases
    • Disputes with Real Estate Agents
    • Drafting and Preparation of Caveats over Land and Property
    • Evictions
    • Lease Disputes and Disputes over Properties and Caveats
    • Legal Advice on Leases
    • Property Disputes
    • Property Law Advice & Real Estate Disputes
    • Property Leases & Contracts
    • Recovery of rent & outgoings pursuant to leases
    • Retail Shops Act Advice
    • Setting aside S138b TLA notices
    • Strata Titles
    • Transfer of Land Act 1983 (WA)
  • Family Law
    • Binding Financial Agreements
    • Can a Binding Financial Agreement (‘BFA’) be Set Aside by a Court in Western Australia?
    • Child Support Agreements
    • DeFacto Relationships
    • Division of Assets & Time Limits for Property Settlements
    • Divorce and Family Law
    • Divorce Orders in the Perth Family Courts
    • Enforcement of Agreements and Orders
    • Expert Valuations & Superannuation in Property Settlements
    • Family Court Consent Order vs Binding Financial Agreement
    • Independent Legal Advice in Perth on Binding Financial Agreements
    • Injunctions
    • Mediation and Family Dispute Resolution
    • Parenting and Children’s Matters
    • Property Settlements
  • Corporate Law
    • Advice on Corporate Structure
    • ASIC Investigations
    • Commercial Crime
    • Commercial Fraud
    • Company Searches
    • Directors duties & liabilities
    • Fraud & Corporate Crime
    • Insider Trading
    • Legal Advice on Corporations Act 2001
    • Oppressive conduct
    • Receivership
    • Shareholder Agreements
    • Shareholder Disputes
    • Theft of Company Property
    • Voluntary administration
    • Winding Up
  • Banking & Finance
    • Debt recovery
    • Bankruptcy & insolvency
  • Business & Corporate Advice
    • Asset Structure & Protection Strategies
    • Business Structures Advice Perth
    • Commercial contracts
    • Company searches and Business name searches
    • Companies & Businesses Startups & Advice on Best Business Structures
    • Consumer Law
    • Due Diligence / Purchase of a Business
    • Import Duty Cases – Perth Customs & Trade Lawyers
    • Leases
    • Licence Agreements
    • Preparation of Credit Applications
    • Preparation of standard terms of trading including securities clauses and costs recoverable clauses
    • Purchase & sale of businesses or companies
    • Purchase & sale of properties
  • Employment Law
    • Breaches of Contracts of Employment
    • Deeds of Confidentiality
    • Defending Worksafe Prosecutions
    • Defending workplace injury claims
    • Employee Restraint of Trade Voided
    • Employees Stealing Trade Secrets
    • Executive Service Agreements
    • Improper Use of Company Property
    • Industrial Relations
    • Legal Advice on Restraint of Trade and Non Compete Clauses
    • Restraint Clauses & Non Compete Agreements
    • Theft of Employers’ Clients
    • Unfair Dismissal Claims for Employers
    • Theft of confidential Information
    • Theft of Trade Secrets
    • Improper use of Company Property
    • Unfair Dismissal Claims for Employers
  • Defamation
    • Legal Advice on awards for defamation
    • Supreme Court proceedings for damages for defamation
  • Sports Law
    • Sports Contract Legal Advice & Negotiations
  • Music Law
  • Insolvency
    • Attending court to obtain orders for Winding Up Companies
    • Attending court on Setting Aside of Statutory Demands
    • Drafting bankruptcy notices
    • Drafting winding up notices
    • Letters of Demand & Statutory Demands
    • Winding up of companies, bankruptcies & statutory demands
  • Second Opinion on Cases
  • Wills & Estate Planning
    • Complex Families and Complex Wills
    • International Probate
    • Letters of Administration
    • Probate & Probate Disputes
    • Testamentary Guardianship and Children
    • Wills for Business Owners
  • Estate Law and Estate Litigation
    • Contesting a Will
  • Franchises, Advice and Disputes
    • Franchise Agreements and Disputes
    • Ketchell v Master of Education Services Pty Ltd
  • Terms & Conditions
    • Advice on the Preparation of Credit Applications
    • Legal Advice on Terms & Conditions
    • Preparation of Credit Applications
    • Small Business Set up – Small Business General Legal Advice – Small Business Terms & Conditions
    • Supply Contracts
TESTIMONIALS

You are in very good hands, check what our customers are talking about

VIEW ALL TESTIMONIALS
Chris, Airport Alliance

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.

Louise

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.

 

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Ahern Sierakowski Lawyers

South Perth:

3, 78 Mill Point Road,

South Perth WA 6151

Phone: (08) 9335 8888

Email: info@aslawyers.com.au

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