Cal. Code Regs. Tit. 14, § 13250 - Improvements to Existing Single-Family Residences (2024)

(a) For purposes of Public Resources Code Section 30610(a) where there is an existing single-family residential building, the following shall be considered a part of that structure:

(1) All fixtures and other structures directly attached to a residence;

(2) Structures on the property normally associated with a single-family residence, such as garages, swimming pools, fences, and storage sheds; but not including guest houses or self-contained residential units; and

(3) Landscaping on the lot.

(b) Pursuant to Public Resources Code Section 30610(a), the following classes of development require a coastal development permit because they involve a risk of adverse environmental effects:

(1) Improvements to a single-family structure if the structure or improvement is located: on a beach, in a wetland, seaward of the mean high tide line, in an environmentally sensitive habitat area, in an area designated as highly scenic in a certified land use plan, or within 50 feet of the edge of a coastal bluff.

(2) Any significant alteration of land forms including removal or placement of vegetation, on a beach, wetland, or sand dune, or within 50 feet of the edge of a coastal bluff, or in environmentally sensitive habitat areas;

(3) The expansion or construction of water wells or septic systems;

(4) On property not included in subsection (b)(1) above that is located between the sea and the first public road paralleling the sea or within 300 feet of the inland extent of any beach or of the mean high tide of the sea where there is no beach, whichever is the greater distance, or in significant scenic resources areas as designated by the commission or regional commission, an improvement that would result in an increase of 10 percent or more of internal floor area of an existing structure or an additional improvement of 10 percent or less where an improvement to the structure had previously been undertaken pursuant to Public Resources Code Section 30610(a), increase in height by more than 10 percent of an existing structure and/or any significant non-attached structure such as garages, fences, shoreline protective works or docks.

(5) In areas which the commission or a regional commission has previously declared by resolution after public hearing to have a critically short water supply that must be maintained for the protection of coastal resources or public recreational use, the construction of any specified major water using development not essential to residential use including but not limited to swimming pools, or the construction or extension of any landscaping irrigation system.

(6) Any improvement to a single-family residence where the development permit issued for the original structure by the commission, regional commission, or local government indicated that any future improvements would require a development permit.