AMY at Martin
Philadelphia, PA
Grades 6 to 8 · 185 students
Public school
Building 21
Philadelphia, Pennsylvania · Grades 9 to 12 · Philadelphia City SD
Public school
About Building 21
Building 21 is a public school in Philadelphia, Pennsylvania, serving grades 9 through 12. Enrollment was 371 in the 2024-25 school year. That makes it one of the smaller public and charter high schools in Philadelphia. With about 18.1 full-time-equivalent teachers, that works out to roughly 20.5 students per teacher. Philadelphia City SD runs 219 schools listed here, including this one. See them all. The surrounding area is classified as a large city. Within 5 miles there are 212 other schools, so families have nearby options to compare.
Open Houses & Tours
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Parent reviews
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School facts
| Address | 6501 Limekiln Pike, Philadelphia, PA 19138 |
|---|---|
| Phone | (215) 400-7450 |
| School district | Philadelphia City SD |
| Grades | 9 to 12 |
| Students (2024-25) | 371 |
| Teachers (full-time equivalent, 2024-25) | 18.1 |
| Students per teacher | 20.5 |
| Charter school | No |
| School type | Regular |
| Level | High |
| Locale (NCES) | City, large, Philadelphia County |
Source: NCES Common Core of Data (CCD), 2024-25 public school directory and membership files (NCES school ID 421899007534). Details may have changed since the survey. Schools can update them by claiming this profile.
Nearby schools
Mt Airy Christian Day SchoolPrivate, Church of God in Christ · Grades PreK to KPhiladelphia · 0.2 miOak Lane Schools IncorporatedPrivate · Grades PreK to 5Philadelphia · 0.3 miWagner Gen Louis MSPublic · Grades 6 to 8Philadelphia · 0.3 miImhotep Institute CHSCharter · Grades 9 to 12Philadelphia · 0.3 miRowen William SchPublic · Grades K to 5Philadelphia · 0.4 miPrince Hall SchPublic · Grades PreK to 5Philadelphia · 0.4 miAdelaide Educational CenterPrivate, Pentecostal · Grades PreK to 6Philadelphia · 0.4 miKing Martin Luther HSPublic · Grades 9 to 12Philadelphia · 0.5 mi
The 8 closest public, charter and private schools by straight-line distance, from NCES location data. Listings here are never paid.
Frequently asked questions
What grades does Building 21 serve?
Building 21 serves grades 9 through 12.
How many students attend Building 21?
Building 21 reported 371 students in 2024-25, according to the NCES Common Core of Data.
What is the student-teacher ratio at Building 21?
About 20.5 students per full-time-equivalent teacher, based on 371 students and 18.1 teachers in federal data.
Is Building 21 a public or charter school?
Building 21 is a traditional public (non-charter) school.
What school district is Building 21 in?
Building 21 is part of Philadelphia City SD. See all schools in this district at https://parentschoolreview.com/districts/pa/philadelphia-city-sd/
Where is Building 21 located?
Building 21 is at 6501 Limekiln Pike, Philadelphia, PA 19138. The phone number is (215) 400-7450.
How many other schools are near Building 21?
There are 212 other schools within 5 miles of Building 21 in our directory.
Is this your school?
Claim this profile for free to correct details, post open houses and tours, and respond to reviews.
ParentSchoolReview is owned and operated by School Success. Disclosure.
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