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Trusted Legal Representation in Idaho
Mathieu, Ranum & Allaire has built a reputation as a trusted boutique law firm serving clients across Idaho, California, and New York. Our attorneys bring over 75 years of combined legal experience, specializing in business law, real estate transactions, estate planning, and non-profit organizations. We combine the depth of expertise typically found in large firms with the personalized service of a small practice, prioritizing long-term client relationships. Our team is licensed in multiple states and has guided businesses, families, and charitable organizations through complex legal matters for decades.

We focus on delivering efficient, cost-effective solutions tailored to each client's unique needs, whether they are startups, established corporations, or individuals planning their legacy. Our commitment to excellence is reflected in our track record of representing diverse clients, from publicly traded companies to private foundations, while maintaining a client-centric approach. We emphasize transparency, strategic guidance, and practical advice to help clients navigate legal challenges with confidence.
Services
Business Law Real Estate Transactions Estate Planning Trust Administration Non-Profit Organizations
Highlights and features
  • We have over 75 years of combined legal experience in business, real estate, and estate planning.
  • Our attorneys are licensed in Idaho, California, and New York, serving diverse jurisdictions.
  • We provide personalized service with the expertise of a large firm in a boutique setting.
  • Our practice covers complex legal matters including corporate law, trusts, and non-profits.
  • We prioritize long-term client relationships and cost-effective, strategic legal solutions.
Services
Business Law
Our business law practice provides strategic legal guidance for companies of all sizes, from startups to publicly traded corporations. We handle entity formation, mergers and acquisitions, securities compliance, and contract negotiations. Our attorneys focus on delivering practical solutions to help businesses navigate complex legal challenges while minimizing risk and maximizing growth opportunities.
Real Estate Transactions
We offer comprehensive legal services for residential and commercial real estate transactions, including purchase agreements, lease negotiations, and title disputes. Our attorneys work closely with clients to ensure smooth transactions while addressing zoning, financing, and regulatory compliance issues. We represent buyers, sellers, landlords, and tenants in both routine and complex property matters.
Estate Planning
Our estate planning services help individuals create customized plans for asset distribution, tax minimization, and family protection. We draft wills, trusts, and advanced directives while addressing probate avoidance and charitable giving strategies. Our approach emphasizes clear communication to ensure clients understand their options and make informed decisions about their legacy.
Non-Profit Organizations
We provide specialized legal support for non-profits, including formation, tax exemption applications, governance compliance, and grant structuring. Our attorneys advise public charities and private foundations on regulatory requirements, board responsibilities, and strategic planning. We also assist donors with charitable gift arrangements and tax-efficient giving strategies.
Trust Administration
Our trust administration practice guides trustees through the complex process of managing and distributing trust assets. We handle tax reporting, beneficiary communications, and legal compliance while addressing potential disputes. We also assist personal representatives in probate proceedings, ensuring efficient resolution of decedents' estates in accordance with Idaho and applicable state laws.
People
Cheryl A. Allaire
Co-Managing Member
Cheryl Allaire has over 30 years of experience advising businesses on corporate law, securities, and real estate transactions. Licensed in Idaho, California, and New York, she provides strategic guidance to startups and established corporations while co-leading the firm's business law practice.
Elizabeth L. Mathieu
Co-Managing Partner
Elizabeth Mathieu specializes in estate planning and non-profit law, with decades of experience advising charitable organizations and families. Based in Ketchum, she focuses on trust administration, tax-efficient giving strategies, and legacy planning while co-leading the firm's charitable organizations practice.
Questions
What areas of law does Mathieu, Ranum & Allaire specialize in?
We specialize in business law, real estate transactions, estate planning, trust administration, and non-profit organizations, serving clients across Idaho, California, and New York.
Are your attorneys licensed in multiple states?
Yes, our attorneys are licensed in Idaho, California, and New York, allowing us to represent clients across these jurisdictions.
How does your firm approach estate planning?
We create customized estate plans that address wills, trusts, tax planning, and legacy goals, focusing on each client's unique family and financial situation.
Do you represent businesses of all sizes?
Yes, we work with startups, closely held businesses, and publicly traded corporations, providing legal guidance tailored to their specific needs.
Can you assist with non-profit organization legal matters?
Yes, we advise public charities and private foundations on compliance, governance, and charitable planning, with decades of experience in the field.
What is your firm's approach to client service?
We combine the expertise of a large firm with personalized service, emphasizing transparency, strategic advice, and long-term client relationships.