The Ninth Circuit held that the Forest Service’s substantial reduction of a forest thinning project between the Draft and Final EAs did not require repeating the public comment process or considering new alternatives under NEPA. However, it found the Forest Service violated NEPA by failing to adequately analyze cumulative impacts in conjunction with a related project.

The Ninth Circuit upheld the Federal Aviation Administration's decision to study only the project and the no action alternative in an EIS for a new passenger terminal. However, the court found the FAA violated NEPA by failing to account for the combined noise that could result from the simultaneous operation of different types of construction equipment. City of Los Angeles v.

A hotel owner brought a lawsuit against a county transportation authority and a general contractor for nuisance and inverse condemnation alleging that the construction of an underground subway line disrupted the operation of the hotel and caused various problems, such as noise and dust, which interfered with the use and enjoyment of the property and resulted in monetary damages.

A traffic mitigation fee required for construction of a single-family home did not amount to an "unconstitutional condition" in violation of the takings clause of the Fifth Amendment, and the County complied with the Mitigation Fee Act in assessing the fee. Sheetz v. County of El Dorado, No. C093682 (4th Dist., Oct 19, 2022).

The Court of Appeal held that absent a distinction between short- and long-term rentals, both are permitted under city zoning ordinances, and any ban on short-term rentals that changes the status quo is an amendment that requires Coastal Commission approval. Darby T. Keen v. City of Manhattan Beach 77 Cal. App. 5th 142 (2022).

The court of appeal found that the California Coastal Commission erred by approving a coastal development permit for a residential development before environmental review for the project had been completed. Friends, Artists and Neighbors of Elkhorn Slough v. California Coastal Commission, 2021 WL 5905714 (No. H048088, 6th Dist., December 14, 2021).

The U.S. Supreme Court held that property owners do not have to comply with state administrative processes to obtain a final decision before bringing a takings claim under 42 U.S.C. § 1983 when the government's position is clear. Pakdel v.

A city's ban on short-term vacation rentals in the coastal zone constitutes "development" under the California Coastal Act. Therefore, the Coastal Commission must first approve a coastal development permit, an amendment to the city's certified local coastal program, or an amendment waiver before such a ban can be imposed. Kracke v. City of Santa Barbara, 63 Cal. App. 5th 1089 (2021).

An initiative measure that required new development to mitigate not only its individual traffic impacts but also cumulative impacts of other projects on traffic levels of service violated the rough-proportionality standard of Nollan and Dolan and was therefore unconstitutional.