Unlike the structural alteration and seismic retrofitting of existing buildings, the Commercial Tenant Improvements can be done over the counter for plan check and permitting. Since all the improvements are inside the building, therefore there is no need for planning and zoning plan checking. Also the Historic Committee will not be involved.
Unless your improvement involves the removal of load bearing elements such as columns and bearing walls, there is no need to use the services of a Structural Engineer.
The Commercial Tenant Improvement can be finalized with one or two times face to face seating with the Building Official for permitting.
You need an experienced locally licensed architect, who is familiar with the local Building Department Officials for permitting process.