Recent legislative developments across the United States are significantly impacting the intersection of water law and real estate, introducing new compliance requirements and considerations for property owners, developers, and investors.
In Illinois, effective January 1, 2025, landlords are mandated to disclose if rental properties are located within a 100-year floodplain. Additionally, they must inform tenants of any known flooding incidents affecting the property or its parking areas, including the frequency of such events. Failure to comply allows tenants to terminate leases and may expose landlords to liability for damages to tenants’ personal property resulting from undisclosed flooding. This legislation aims to enhance transparency and protect tenants from unforeseen flood risks. ([illinoisrealtors.org](https://www.illinoisrealtors.org/blog/new-year-new-laws-2025/?utm_source=openai))
Arizona has introduced new groundwater regulations that are reshaping the state’s real estate landscape. Developers are now required to demonstrate a 100-year assured water supply for new projects, a requirement previously limited to Active Management Areas (AMAs). This expansion affects developments statewide, particularly in water-scarce regions, and has led to project delays and increased construction costs as builders reassess water availability. Legal challenges are anticipated as stakeholders navigate these stringent requirements. ([gottlieblawaz.com](https://gottlieblawaz.com/2025/04/11/arizonas-new-groundwater-rules-and-homebuilding-legal-challenges-developers/?utm_source=openai))
In Virginia, as of July 1, 2025, localities operating storm sewer systems have been granted broader rights to enter private property for inspections and enforcement under the Virginia Erosion and Stormwater Management Act. This change underscores the state’s commitment to environmental oversight and may influence property maintenance obligations for owners. ([sandsanderson.com](https://www.sandsanderson.com/insights/thought/virginia-real-estate-law-updates-for-2025?utm_source=openai))
California has enacted Assembly Bill 98, introducing new design and building standards for logistics properties. The law establishes minimum distance requirements from sensitive areas such as schools and homes, enforces renewable energy standards, and mandates contributions to an affordable housing fund for projects replacing housing with logistics developments. These standards supersede local land use regulations and apply specific criteria based on the size and location of warehouses, with a particular focus on the Inland Empire, a key logistics hub east of Los Angeles. ([sheppardmullin.com](https://www.sheppardmullin.com/article-4658?utm_source=openai))
In Texas, water rights are a critical consideration for real estate investors. The state employs two primary water rights systems: riparian rights and the prior appropriation system. Prospective buyers must verify which, if any, of these systems apply to their desired property. Securing water rights requires detailed legal investigation, including a review of water rights as part of the property title search. ([daughtreylaw.com](https://daughtreylaw.com/2024/11/11/secure-texas-water-rights-essential-for-real-estate-investors/?utm_source=openai))
These legislative changes reflect a growing emphasis on environmental responsibility and resource management in real estate. Stakeholders must stay informed and adapt to these evolving legal landscapes to ensure compliance and mitigate potential risks associated with water law and property development.