Chapter 9.232 — PORTOLA BLUFF RESIDENTIAL DISTRICT

The Portola Bluff residential district is established to provide for the development and maintenance of single-family residential development which is compatible with the bluff above Aliso Creek and the existing residential development in the Portola Hills Planned Community. (Ord. 174 § 1, 2007)

The following principal uses are permitted:

Residential care facilities, in accordance with Chapter 5.44 (Residential Care Facilities). (Ord. 363 § 21, 2023)

The following principal uses are permitted subject to the approval of a site development permit under Chapter 9.184 :

• A. Single-family dwelling;

• B. Open space uses;

• C. Small and large family day care homes;

• D. Limited home rentals;

• E. Public or private utility buildings and structures;

• F. Any other use that the Planning Commission finds is consistent with the purpose and intent of this district.

(Ord. 174 § 1, 2007; Ord. 297 § 13, 2017; Ord. 363 § 22, 2023)

The following principal uses are permitted subject to the approval of a use permit per Chapter 9.184 :

• A. Wireless communication facilities under Chapter 9.162 ;

• B. Churches, temples, and other places of worship;

• C. Educational institutions;

• D. Any other use that the Planning Commission finds is consistent with the purpose and intent of this district.

• (Ord. 174 § 1, 2007; Ord. 297 § 13, 2017)

The following accessory uses and structures are permitted when associated with and subordinate to a permitted principal use on the same legal parcel of land:

• A. Fences and walls;

• B. Garages and carports;

• C. Patio covers;

• D. Swimming pools;

• E. Entry monument signs under Chapter 9.164 ;

• F. Accessory dwelling units, or ADUs, in accordance with Section 9.146.050 ;

• G. Noncommercial keeping of pets and animals;

• H. Accessory uses that the Community Development Director finds are consistent with the purpose and intent of this district.

• (Ord. 174 § 1, 2007; Ord. 297 § 13, 2017)

The following uses are specifically prohibited:

• A. Keeping of pets or animals for any commercial purpose;

• B. Storage of vehicles, equipment or products related to a commercial activity;

• C. Use of chain-link fencing, except during construction activities;

• D. Transitory lodgings;

• E. Any use not expressly permitted by this chapter.

• (Ord. 174 § 1, 2007; Ord. 297 § 13, 2017)

• A. Building Site Area. Four thousand square foot minimum.

• B. Building Site Width. No minimum.

• C. Building Height. Not to exceed 25 feet, measured per Section 9.144.050 .

• D. Building Site Coverage. Total site less the required setbacks.

• E. Off-Street Parking. Per Chapter 9.168 .

• F. Building Setbacks.

  1. Ten feet minimum from any property line abutting a street.

  2. Side. Ten feet minimum for one side only, or 10 feet aggregate total for both sides. Where the building lines on adjacent building sites have not been determined, the minimum setback shall be 10 feet.

  3. Rear. Ten feet minimum.

  4. Front. Ten feet minimum, garages 20 feet minimum.

  5. From bluff edge. Twenty feet minimum.

• G. Fences and Walls, Maximum Height. Per Chapter 9.144 .

• H. Lighting. Exterior lighting shall be designed and located so as to confine direct rays to the premises.

• (Ord. 174 § 1, 2007)

• A. Maximum Development (See FTSP pg III-28 sec 5.2). The maximum number of dwelling units permitted within this district shall be five dwelling units. In no case shall this maximum be exceeded. It is in no way intended or implied that the maximum number of dwelling units permitted is a guaranteed level of development. The ultimate number of dwelling units permitted shall be subject to approval by the Planning Commission in conjunction with a site development permit and/or area plan.

• B. All discretionary approvals shall be consistent with the following guidelines for the protection of resources:

  1. Oak Woodlands. Oak woodlands are defined as those general areas identified by a qualified biologist as having characteristics of an oak woodland plant community and are extensive enough to be considered habitat of local significance.

     • a. Applicants for development proposals on parcels containing oak woodlands shall be required to provide a site-specific oak woodland analysis prepared by a qualified biologist/arborist to determine the precise boundary of the oak woodland. Said analysis shall include detailed mapping of at least one is to one hundred (1:100) scale.

     • b. Oak woodlands shall be preserved in an undisturbed state to the greatest extent possible while still allowing for reasonable development. The site-specific analysis shall identify the level of impact of the proposed project and methods of reducing or avoiding adverse impacts of the project. The impact analysis shall consider all forms of disturbance resulting from the development, including changes in runoff, impacts within the drip line of trees, etc. If oak trees are proposed to be transplanted, the analysis shall identify suitable locations for the transplantation of oak trees.

2. Streambeds. Streambeds are defined as major streambeds shown as a blue-line feature on USGS Quadrangle maps and/or Thomas Guide maps.

   • a. Applicants for development proposals on parcels containing streambeds shall be required to prepare a site-specific streambed analysis prepared by a hydrologist to determine the precise boundary of the streambed. Said analysis shall include detailed mapping of at least one is to one hundred (1:100) scale.

   • b. Applicants are required to submit detailed, site-specific analyses to identify direction and flow of natural runoff from the site, or immediately adjacent to the site. The detailed, site-specific analysis shall address the need for mitigation measures to keep velocities close to pre-development levels.

   • c. All development shall minimize discharge so that future storm flows do not significantly exceed existing flow levels.

(Ord. 174 § 1, 2007)