Modification Plan Example
The Modification Plan is a separate sheet in the plan set and does not include structural details.
- Scale 1/4" = 1 foot.
- Please provide floor plan showing and stating the dimensions of demolished and modified walls, floors, roofs. All modified walls measured in multiples of four feet.
- Added walls, floors, roofs or foundations need not be illustrated, as these do not count. A demolished wall, roof, foundation or floor does count and must be shown.
- Do not show decks unless fully enclosed or embedded in the structure’s roof.
- Do not show basement walls or floors if space meets definition of basement.
- Do not include attic walls or floors unless the “attic” is a story pursuant to 13.10.700‐ A.
- Please provide one number stating total length of existing exterior walls, including all stories, but not including deck walls (unless enclosed), basement walls or attic walls. Thus, if the first-floor exterior wall perimeter is 1,000’ and the second-floor exterior wall perimeter is 700’, the total wall length is 1,700’.
- State total area of existing floor structure. Do not include deck floors or porches unless fully enclosed. Do not include attics (unless a story), basements or additions. Do not use FAR (Floor‐ Area Ratio) guidelines.
- State total area of existing roof. Include sealed decks that act part of primary roof, but do not include eaves or deck roofs (unless deck enclosed). Do not include additions.
- Perimeter foundations: show and state the length of existing, demolished and modified foundation areas only, and state total length of exterior perimeter foundation. Foundations for additions need not be shown, but sistered foundations are considered modifications.
- Slab foundations: show and state the dimensions and area of existing, demolished and modified slab areas only, not including existing decks, porches or new slabs, and state total area of existing slab.
- Pier and grade beam foundations: show – and state the length of ‐‐ existing, demolished and modified foundation areas, and new piers or other reinforcements added to support existing beams, as these are considered modifications. State total, cumulative length of existing grade beams, including both exterior grade beams and grade beams under interior areas of structure. Note: where a pier and grade beam or perimeter foundation is reinforced with piers, anchors, etc., the modified foundation length is equal to the average spacing between modified piers multiplied by the number of piers. In locations where only one pier (anchor, etc.) is being added, it shall count as a modification of four feet.
- Combined foundations: also show dimensions of and state the TOTAL floor area supported by each type of foundation. For example, if the perimeter foundation of a dwelling unit supports 1,000 square feet of floor area, and the garage slab supports 800 square feet of floor area, enter those two figures into the Modification Spreadsheet. Do NOT attempt to calculate the areas supported only by modified foundation segments unless the County requests this information.
For additional information, please review the overview page – specifically: