Lammersville Joint Unified, CA

Original Research by School Decision on Lammersville Joint Unified

Lammersville Joint Unified serves a large and rapidly growing district across six school sites in San Joaquin County's southeastern corridor, centered on the master-planned Mountain House community. The district encompasses kindergarten through grade twelve and is spread across multiple locations in and around Tracy. With strong student composition marked by a substantial Asian student majority and solid baseline proficiency across English language arts and mathematics, this is a district positioned in an area of active residential expansion.

State testing data from the most recent cycle show the district performing in the upper range among San Joaquin County's districts on an overall proficiency index spanning tested subjects and grades. In English language arts, proficiency runs highest in the middle school grades, with eighth graders reaching above three-quarters proficiency and sixth and seventh graders very close behind. Elementary ELA proficiency, particularly in third grade, sits somewhat lower but still in the mid-range. Mathematics proficiency is fairly consistent across grade bands three through eight, hovering around seven in ten students. Science proficiency, measured in grades five and eight, shows a wider spread: fifth graders are running at about six in ten proficient, while eighth graders jump to just under three-quarters.

The district's chronic absenteeism rate, at roughly one in nine students, places it in the top quartile among the county's districts. Per-pupil current spending is in the lower range compared to county peers, a reflection of the district's approach to resource allocation.

Enrollment is distributed across nine schools, with substantial representation in elementary grades and moderate tapering toward high school. The student body is approximately three-fifths Asian, roughly one in eight Hispanic, roughly one in nine white, and smaller shares of Black and multiracial students. Data on free-or-reduced-price-lunch eligibility and English learner status were not reported.

Recent district infrastructure changes are relevant to families considering the area. A new K-8 campus, Evelyn Costa Elementary School, opened in mid-2023 on Gobind Boulevard at the southern end of Mountain House, providing neighborhood school capacity as that master-planned community continues adding housing. The district's only comprehensive high school, Mountain House High, completed a Phase III expansion in mid-2025 that added classroom space including dedicated science labs, supporting the school's seven-period day structure. That schedule permits a portion of the student body to take an additional elective, career and technical education course, Advanced Placement class, or academic offering alongside their core requirements.

Housing values in the district's service area have declined slightly year-over-year and sit above the state median. Rental costs for the area are substantial relative to the region's household income, with rent comprising a significant share of household budgets. The unemployment rate is steady and modest, and household median income has climbed modestly in recent years.

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District Context

Officially reported figures, 2024-25.

Enrollment

7,764

Grades

KG–12

Schools

Student body

Hispanic 13%

Black 4%

White 12%

Asian 62%

Two+ 7%

Am. Indian / AK Native 1%

Hawaiian / Pac. Isl. 0%

By economic status

Percent proficient by grade, as reported

Economically disadvantaged

Not disadvantaged

ELA

Gr ALL

48%

—

Gr 3

46%

70%

Gr 4

47%

75%

Gr 5

43%

79%

Gr 6

52%

80%

Gr 7

37%

84%

Gr 8

51%

83%

Gr 11

63%

—

Math

Gr ALL

42%

—

Gr 3

51%

79%

Gr 4

45%

76%

Gr 5

33%

74%

Gr 6

47%

76%

Gr 7

34%

77%

Gr 8

43%

77%

Gr 11

39%

—

Science

Gr ALL

35%

—

Gr 5

33%

64%

Gr 8

42%

77%

Gr 11

44%

—

Gr HS

39%

—

Gr UG_SEC

42%

—

Schools in this District

9 schools are officially reported under this district.

Lammersville Elementary

Wicklund Elementary

Bethany Elementary

Sebastian Questa Elementary

Mountain House High

Altamont Elementary

Hansen Elementary

Julius Cordes Elementary

Evelyn Costa Elementary

Academic Performance

Percent of students meeting or exceeding state standards, by grade.

Mathematics

6 grades reported

74%

Grade 3

73%

Grade 4

70%

Grade 5

73%

Grade 6

72%

Grade 7

74%

Grade 8

English Language Arts

6 grades reported

67%

Grade 3

72%

Grade 4

75%

Grade 5

77%

Grade 6

78%

Grade 7

80%

Grade 8

Science

2 grades reported

61%

Grade 5

73%

Grade 8

Social Studies

1 grade reported

68%

Grade 8

Housing & Real Estate

Data as of April 2026 | District-weighted from constituent ZIP codes

Home Values

Typical home value$856,595

Year-over-year change-6.4%

Range across 3 ZIP codes$773K to $929K

vs. state typical1.10x

vs. national typical2.33x

Home value trend (12 months)

ZIP code home values (3 ZIP codes)

ZIP	City	Value	YoY	Weight
95377	Tracy	$773K	-5.7%	45.5%
95391	Tracy	$929K	-9.1%	34.9%
95304	Tracy	$922K	-3.3%	19.6%

Rental Market

Typical monthly rent$2,922/mo

Year-over-year change-1.2%

Range across 3 ZIP codes$2,717 to $3,019/mo

Rent trend (12 months)

ZIP code rents (3 ZIP codes)

ZIP	City	Rent/mo	YoY	Weight
95377	Tracy	$2,936	+1.3%	45.5%
95391	Tracy	$3,019	-4.6%	34.9%
95304	Tracy	$2,717	—	19.6%

Affordability

Est. monthly mortgage (20% down at 6.48%)$4,322/mo

Home price / national median income10.2x

Annual rent / national median income41.9%

Est. mortgage exceeds rent by$1,401/mo

Comparison

State typical home value$776,233 (-1.1% YoY)

National typical home value$368,198 (+0.6% YoY)

State ZHVI trend (12 months)

National ZHVI trend (12 months)

Economic Context

30-year fixed mortgage rate6.48%

National unemployment rate4.3%

National median household income$83,730

CPI: Rent of shelter (index)447.05

30-year fixed mortgage rate (12 months)

National unemployment rate (12 months)

National median household income (12 months)

CPI: Rent of shelter (index) (12 months)

Sources: Zillow Home Value Index and Zillow Observed Rent Index (Zillow Group), Realtor.com via Federal Reserve Bank of St. Louis (FRED)

Data Currently Unavailable

Civil Rights Data (CRDC)

This profile is derived exclusively from publicly available federal and state datasets. It may not reflect the most current information available. We encourage parents and families to supplement this data with information published directly on the school’s website, which may include more recent figures, additional programs, or updated enrollment data.