Scott Wallace Engineering 22806 Aspan St # 402, Lake Forest, CA92630 The Scott Wallace Engineering firm specializes in home design and construction of commercial properties. Its past work…More can be seen all over Orange and Los Angeles Counties in shopping plazas, office buildings and construction sites. The firm can start with the initial design of a large project and see it through until completion, taking part in every major decision. The office is small yet accommodating. It's located along Aspan Street, in the back of a business park.