Conservation groups fight a housing project on Yosemite’s border

Three groups urge county to reject plan

Three of the country’s biggest conservation groups want Mariposa County, California, to block a 110-unit housing development right next to Yosemite National Park.

The National Parks Conservation Association, Coalition to Protect America’s National Parks, and National Wildlife Federation sent a joint letter to the county on March 6.

They say the project would bring more traffic, strain water systems, raise wildfire risk, and threaten wildlife near one of America’s busiest parks.

The developer, Camp Yosemite LLC, has not commented publicly.

Developer wants 110 modular homes built

Camp Yosemite LLC filed two development applications with Mariposa County on Nov. 25, 2025. The plan calls for 110 factory-built modular homes on about 31 acres next to the small community of Yosemite West.

Both parcels sit right on the border of Yosemite National Park.

The project includes a mix of one- and two-story units with on-site parking, and a portion of the homes would go to lower-income households.

A state housing law made this possible

The developer is using California’s SB 330, known as the “builder’s remedy” law, to push the project forward. That law kicks in when a county has not adopted a housing plan that meets state standards.

Once it applies, local governments have limited power to reject qualifying housing projects based on local zoning.

Conservation groups argue lawmakers never meant for SB 330 to force large developments in sensitive areas next to national parks.

New homes would send traffic through the park

The groups say more than 100 new homes would put a large wave of new vehicles on roads inside Yosemite. The park already deals with traffic jams that can last hours at entrance stations.

The development’s only access road runs through Yosemite West and connects to Highway 41 inside the park.

The National Park Service has turned down requests to build a second exit road for past projects in the area, so there is no backup route.

Yosemite already struggles with crowds

Yosemite welcomed more than 4 million visitors in 2024, making it the fifth-busiest year in the park’s history. Visitation grew by about 30% between 2000 and 2019, and pressure keeps building.

The park recently dropped its reservation system for 2026 under Superintendent Ray McPadden, a move conservation groups have criticized.

Without reservations, advocates warn overcrowding could get even worse during peak summer months.

Wildfires have hit this area before

The proposed site sits in what experts call the wildland-urban interface, where homes meet undeveloped forest. The area knows fire well.

The 2018 Ferguson Fire burned about 96,900 acres and forced evacuations from Yosemite West. The 2013 Rim Fire scorched roughly 257,300 acres and remains the largest wildfire in Yosemite’s recorded history.

The groups say the site’s steep terrain, dense vegetation, and limited emergency access would make a future fire especially dangerous.

Water and sewer systems already fall short

Yosemite West’s water system runs on a single well.

The community’s wastewater system hit capacity years ago and has a history of problems going back to a major failure in 1998. Conservation groups say both systems already fall out of compliance with state laws.

Under California law, a county can deny a development if it lacks adequate water or wastewater systems to serve the project, and the groups say that standard clearly applies here.

One road handles all traffic in and out

The development site has a single access road that winds through Yosemite West and connects directly to Highway 41 inside the park. Thousands of visitors use that highway every day to travel in and out of Yosemite.

Adding more than 100 households to that same road would make daily traffic worse and evacuation during a wildfire or other emergency far harder.

Without a second exit, the groups warn residents could face a deadly bottleneck.

A tribe just reclaimed neighboring land

In late 2025, the Southern Sierra Miwuk Nation reacquired about 896 acres of ancestral land on Henness Ridge, near the proposed development site.

The tribe paid $2.4 million for the land, transferred from the Pacific Forest Trust through a grant from the California Natural Resources Agency.

The tribe plans to use it for cultural restoration, traditional ecological practices, and community healing after 175 years of displacement.

Conservation groups worry a housing project next door could affect those plans, though the tribe has not commented publicly.

Groups demand a full environmental review

The conservation groups want Mariposa County to require a full Environmental Impact Report under the California Environmental Quality Act before the project moves forward.

They want the county to study effects on traffic, water, wildfire risk, wildlife, and public safety. The groups argue there are likely no realistic ways to reduce the project’s harms enough.

They also question whether the builder’s remedy even applies, since they believe the project targets short-term vacation rentals, not long-term affordable housing.

County keeps reviewing the applications

Mariposa County says it has not yet deemed the applications complete.

The county asked the developer for more information on road access, utilities, water supply, and fire safety. If the county allows the project to advance, the fight could move to public hearings and possibly court.

State guidance says local governments that deny qualifying builder’s remedy projects risk lawsuits and enforcement actions.

Residents, tribal representatives, and conservation groups are all watching the county’s next move.

Gateway towns face a bigger question

This dispute reflects a growing tension across the West between housing demand and protecting public lands.

Gateway communities near parks like Yosemite have seen a surge in lodging and vacation rental development in recent years.

Conservation advocates say that pattern strains parks that were never built to handle unlimited growth.

The outcome in Mariposa County could shape how California’s builder’s remedy law interacts with environmental protections near national parks going forward.

This article was created with AI assistance and human editing.

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