1. Lead-based paint disclosure requirements: To protect buyers from lead poisoning, the Environmental Protection Agency (EPA) requires sellers of properties built before 1978 to disclose any known lead-based paint hazards.

2. Radon disclosure requirements: The EPA also requires sellers to disclose any information they have about radon gas levels in the property, which can cause lung cancer.

3. Mold disclosure requirements: Some states and municipalities have laws that require sellers to disclose the presence of mold in the property.

4. Energy efficiency disclosure requirements: Some states and municipalities require sellers to disclose the energy efficiency of the property, as well as any upgrades made to improve its efficiency.

5. Fire safety regulations: Local and state fire codes require certain safety measures in buildings, including working smoke detectors and fire extinguishers.

6. Zoning laws and land use regulations: These laws govern how a property can be used, including whether it can be used for residential or commercial purposes.

7. Building codes and permit requirements: Before making any changes or improvements to a property, builders and property owners must comply with local building codes and obtain necessary permits.

8. Environmental regulations: Properties located near wetlands, flood-prone areas, or other environmentally sensitive areas may have additional regulations or restrictions that must be followed.

9. Tenant rights and landlord-tenant laws: Landlords must comply with local and state laws regarding tenant rights, including maintenance and safety requirements.

10. Fair housing laws and antidiscrimination regulations: Property owners and landlords must comply with federal and state fair housing laws that prohibit discrimination based on race, color, religion, national origin, sex, familial status, or disability.