| Borough | Lewisham |
| Postcode | SE26 6BL |
| Phase | Not applicable |
| School type | Other independent school |
| Gender | Girls |
| Age range | 4–19 |
| Sixth form | Has a sixth form |
| Admissions | Selective |
| Religious character | N/A |
| Overall rating | Not yet rated |
| Attainment 8 score | 55.9 |
| Headmistress | Antonia Geldeard |
| Phone | 02085577000 |
| Website | https://www.sydenhamhighschool.gdst.net/ |
| Crime level | Low crime area |