Map of Mountain House CDP

Mountain House is a planned community in San Joaquin County, California. Mountain House is 5 miles (8.0 km) northwest of Tracy, 10 miles from Livermore, 0.5 miles from Interstate 580 to San Francisco, and about 50 miles (80 km) east of San Francisco. The population was 24,499 at the 2020 census. For statistical purposes, the United States Census Bureau has defined Mountain House as a census-designated place (CDP).

Mountain House CDP overview:
Name:	Mountain House CDP
LSAD Code:	57
LSAD Description:	CDP (suffix)
State:	California
County:	San Joaquin County
Elevation:	82 ft (25 m)
Total Area:	3.192 sq mi (8.268 km²)
Land Area:	3.192 sq mi (8.268 km²)
Water Area:	0 sq mi (0 km²) 0%
Total Population:	24,499
ZIP code:	95391
Area code:	209
FIPS code:	0649582

Online Interactive Map

Mountain House online map. Source: Basemap layers from Google Map, Open Street Map (OSM), Arcgisonline, Wmflabs. Boundary Data from Database of Global Administrative Areas.

Mountain House location map. Where is Mountain House CDP?

Mountain House location on the U.S. Map. Where is Mountain House CDP. — Mountain House location on the U.S. Map.

Mountain House location on the California map. Where is Mountain House CDP. — Location of Mountain House in California.

History

The Cholbon triblet of the Northern Valley Yokuts were the original inhabitants of the Mountain House area. Their territory ran along Old River, a distributary of the San Joaquin River.

In 1849, Thomas Goodall erected a blue denim cloth tent to serve as a midway stopover for gold miners headed from San Francisco to the Sierra Nevada foothills via Altamont Pass. Goodall eventually built an adobe house at the eastern edge of the Diablo Range hills, calling it The Mountain House. Simon Zimmerman later acquired the stop and it became known as Zimmerman’s Mountain House and became a well-known way station stop on the way to Stockton. The last remaining settlement buildings were leveled in 1940.

In November 1994, the San Joaquin County Board of Supervisors officially approved the new community of Mountain House. In 1996, the master plan was approved. In August 2000, many of the documents controlling the development and growth of Mountain House were adopted and approved by the San Joaquin Board of Supervisors acting as the Mountain House Board of Directors.

Mountain House was projected to be a small full-fledged city developed over a 30-year period by the Master Developer Trimark Communities. The community covers 4,784 acres (1,936 ha) in San Joaquin County. The town was planned for 12 distinct neighborhoods including 10 family neighborhoods and two age-restricted neighborhoods, each organized around a center containing a neighborhood park, a K-8 school, and a small commercial area.

Construction began in 2001, but growth slowed down to about 50 permits per year because of the Great Recession in 2008. Development started again with increasing building permits and small land development projects in 2010 and 2011 and has continued at and still continues at a high rate.

As of today, Mountain House includes the established villages of Wicklund, Bethany, Altamont, and Questa, along with the developing villages of Hansen, Cordes, and College Park. Some 15,000 households or approximately 45,000–50,000 people are anticipated when Mountain House is fully completed.

Milestones

November 10, 1994 – Mountain House project approved by San Joaquin County Board of Supervisors.
May 14, 2001 – Trimark breaks ground on Mountain House project.
January 18, 2003 – First home foundation poured.
August 24, 2004 – Wicklund Elementary School opens. MHCSD opens an office at Wicklund Elementary School.
November 6, 2007 – Mountain House votes to form an independent board for the MH Community Services District (MHCSD).
December 7, 2007 – The San Joaquin Delta College satellite campus site is annexed to Mountain House CSD through a public-private partnership with developer Gerry N. Kamilos.
November 2008 – Noted for having the highest percentage of underwater mortgages in the U.S.
November 2008 – First independent board of the MHCSD was elected.
August 17, 2009 – Delta College Mountain House Campus opens.
June 8, 2010 – Voters approve unification of Lammersville Unified School District.
January 2011 – 15-year-old resident Thia Megia becomes youngest finalist ever on American Idol.
July 2012 – Mountain House High School breaks ground.
March 2013 – New development announced for Questa and Altamont Villages.
August 2014 – Mountain House High School opens.
June 2015 – Drought conditions place Mountain House water supply at risk.
September 2018 – Mountain House breaks ground on town hall complex.
March 2020 – Town Hall and Library opens
June 2021 – Safeway breaks ground on the town center, which is a retail shopping center.
January 12, 2022 – A large retail center opens in Cordes Village, which would be including a pizza place, sandwich shop, dental office, and jiu-jitsu studio, since new businesses have moved there and lots of changes happened.
December 2022 – Safeway opens a 55,562-square-foot supermarket in Mountain House.

Financial downturn

In November 2008, The New York Times reported that Mountain House was the “most underwater community in America” – the ZIP code with the highest amount of negative equity on its homes. With home values decreasing across the nation, Mountain House was described as the worst-hit, with 90% of its homes worth less than the amount their owners owe in mortgages. The average homeowner in Mountain House was reported to be $122,000 in debt. Many local businesses in the 95391 ZIP code were closing because the homeowners were cutting back on their spending.

CalPERS, an agency that manages pensions for California public employees, invested heavily in Mountain House beginning in 2005, purchasing approximately 9,000 residential lots from Shea Homes. By May 2010, the $1.12 billion investment by CalPERS had been reduced to 18% of that figure: $200 million. Even though home values had dropped significantly, CalPERS determined that they would hold on to the investment, counting on a recovery of the housing market.

Economic recovery

An uptick in economic performance at Mountain House was noted in September 2011 by Big Builder, a trade magazine of major land and housing development published by Hanley-Wood.

Acknowledging the New York Times 2008 article that branded Mountain House as the most underwater community in America, the article chronicled a grassroots commitment by residents to keep their neighborhoods looking well-kept by mowing neglected lawns of homes in foreclosure, short sales or abandoned.

This community spirit helped persuade CalPERS to hold onto its Mountain House investment, despite the drawbacks of a 1994-vintage land plan, termed “out of sync with the realities of the post-housing crash world”. Helping to balance the challenges of the land plan was the level of established infrastructure and homebuyers motivated by affordable pricing, proximity to job centers and traditional neighborhoods.

In April 2012, Big Builder again reported on the community, noting more robust first-quarter sales, new lot offers, and flexibility for semi-finished and raw land in future development.

Mountain House Road Map

Mountain House city Satellite Map

Geography

Mountain House lies on the foothills of the Diablo Range, and close to the Altamont Pass which is over 1,000 feet (300 m) in elevation. It is on the border of Alameda and Contra Costa counties. According to the United States Census Bureau, the CDP covers an area of 3.2 square miles (8.3 km), all of it land. The census definition of the area may not precisely correspond to local understanding of the area with the same name. The community is bisected by Mountain House Creek. Mountain House Creek originates south of the Altamont Pass and Interstate 580, flowing northeasterly along and crossing under the interstate, then along Grant Line Road to the intersection with Mountain House Road at the historic Alameda County Mountain House. The creek continues northeasterly through the residential communities of Mountain House before emptying into the Old River, a distributary of the San Joaquin River.

Climate

Winter (December–February) temperatures in Mountain House range from the 30s to 60s °F (-1 to 20.5 °C). Springs (March–May) in Mountain House are mild with temperatures in the 40s to 80s °F (4.4 to 31.7 °C). Summers (June–August) can be very hot with temperatures in the 80s to 100s °F (26.7 to 42.8 °C). Fall (September–November) temperatures start in the 80s to 100s °F (26.7 to 42.8 °C) but cool down significantly by November to the 40s to 70s °F (4.4 to 26.1 °C). Windy conditions are common.

Nearby cities and communities

Tracy (San Joaquin County) – 4.2 miles
Livermore (Alameda County) – 15.6 miles
Byron (Contra Costa County) – 9.2 miles
Discovery Bay (Contra Costa County) – 14.8 miles