A construction permit for the addition, extension or alteration of an accessory patio, deck or fence of a townhouse dwelling unit shall not require site plan approval if the addition, extension or alteration is approved by the applicable homeowners' association pursuant to its provisions governing accessory decks, patios and fences set forth in the by-laws or resolutions of the association which received approval by the Township either as a part of a final site plan approval or by subsequent amendment to a prior site plan approval. The foregoing shall in no way affect the responsibility of an applicant to submit to the Township the necessary information, including a letter of approval from the homeowners' association, and receive the necessary approvals as may be required pursuant to other ordinances.