my husband, eric tang and i are the appellant. in light of a new land survey and additional san francisco city codes on the validity of the 1990 permit, we ask the board of appeals to revoke the alteration permit in question. the permit has to be revoked because first, the permit includes two windows that are inside our property. second, both the 1990 and 2018 building codes do not allow any openings on the property line. and third, the 1990 permit is null and void. the permit holder must apply for a new permit. since submitting the appellant brief, we have obtained additional evidence. we hired a california licensed land surveyor to locate the property line between our properties. the land surveyor is here to answer any questions. the survey results confirmed that the entire alley is our property, and that 159 beaumont's face of building is north of the boundary line. that's what's highlighted. as you can see, 159 beaumont's wall encroaches on our property. i'm a licensed architect, and i taught building codes at the academy of a