All portions of nonconforming fences shall be brought into conformance with the chapter, including meeting the required construction standards, when the nonconforming fence is clearly on the subject property and the property owner applies to the building department for a building permit which requires a site plan, such as a new house, garage, carport, second-story additions, exterior remodeling, new decks, re-siding and similar projects, provided the estimated value of the improvements exceeds twenty thousand dollars as determined by the city.