Writing is known as an important skill of a student to be developed for this is one of the methods of communication that are mostly used to convey feelings. Further development of writing is an important aspect of organizing thoughts and ideas towards progress of English language proficiency. The study was pursued to establish the English writing proficiency of senior high school students enrolled at the House of Achievers Learning Center. Also, the researcher tends to determine to the significant difference of the senior high school students when there are divided in strands. The study was designed to be survey research. The sample used for this study is 185 students and the constructed questionnaire was distributed to these respondents. The researcher used the F-test or ANOVA to determine the significant difference of the strands. The collected data showed that the mean totality of the three main aspects: grammar; organization; and mechanics, falls to the category of good and fair. Specifically, the computed mean in grammar is 17.08 (Good), 3.96 (Fair) in organization, and 17.84 (Good) in mechanics. The ANOVA test showed significance in English writing proficiency in the strands.