Every proposed lot shall be suitable for its intended use. Every lot created hereafter shall provide sufficient developable area within the building envelope as delineated by the required setbacks for the placement of the principal building(s), parking, loading, circulation, usable open space, and other improvements. The developable area within the building envelope shall be reasonably free of and unconstrained by wetlands, steep slopes with a gradient of 15% or greater, and easements or other limiting features. An applicant may be required to submit alternative designs to ensure that lot is suitable to the intended use and the Municipal Agency may withhold approval of any lot which is determined to be unsuitable.