O'Neil, Cannon, Hollman, DeJong & Laing S.C

O'Neil, Cannon, Hollman, DeJong & Laing S.C. brings over five decades of legal experience to property tax consulting and assessment appeals throughout the Milwaukee area. Our firm's comprehensive approach combines property tax expertise with deep knowledge of real estate law and business operations, providing clients with sophisticated strategies for tax reduction and assessment challenges. We've represented thousands of property owners in assessment disputes, from homeowners facing unexpected valuation increases to major corporations managing extensive real estate portfolios. Our team understands that property taxes represent a significant ongoing expense that can dramatically impact both personal finances and business profitability, making effective tax reduction strategies essential for our clients' long-term success.

Our property tax practice encompasses the full spectrum of assessment challenges and tax reduction services. For residential clients, we handle single-family home appeals, condominium assessments, and rental property valuations, with particular expertise in Milwaukee's diverse neighborhoods and housing stock. Our commercial services include complex appeals for office buildings, retail centers, manufacturing facilities, and multi-use developments. We provide sophisticated income analysis, market studies, and alternative valuation approaches that challenge overassessments and reflect true market conditions. We also offer proactive tax planning services, helping clients understand assessment methodologies, monitor valuation trends, and identify potential appeal opportunities before they become costly problems. Our team provides consultation on property tax implications for real estate transactions, development projects, and business expansions, ensuring clients make informed decisions about property investments and improvements.

Our appeal process begins with a comprehensive case evaluation including property inspection, market analysis, and review of assessment methodologies used by local assessors. We analyze your property against comparable sales, income potential, and current market conditions to identify grounds for challenge. Once we determine appeal viability, our team prepares detailed challenge packages incorporating market studies, financial analysis, and expert opinions as needed. We handle all procedural requirements, from initial filings through hearing presentations, keeping you informed throughout the process. We represent clients at all levels of appeal, from local assessment boards to state tax courts. Our experienced attorneys are skilled in both negotiation and litigation, ensuring we can adapt our approach based on the specific circumstances of your case and the receptiveness of the particular forum.

We serve Milwaukee and the broader southeastern Wisconsin region, including Waukesha, Racine, and Washington counties. Our practice extends throughout the greater Milwaukee metropolitan area where we maintain detailed knowledge of local assessment practices and market conditions. Our team is familiar with the procedures and personalities in assessment offices throughout the region, allowing us to tailor our approach to each jurisdiction's specific practices while maintaining consistent advocacy standards across all our cases.