10-1.802 Improvements Required.

Walnut Creek Zoning Code · 2026-06 edition · ingested 2026-07-07 · Walnut Creek

  1. General. All improvements as may be required as conditions of approval of the tentative map or City ordinance, together with but not limited to the following, shall be required of all subdivisions.

Requirements for construction of on-site and off-site improvements for subdivisions of four or less parcels shall be noted on the parcel map, or waiver of parcel map or the subdivision improvement agreement recorded prior to or concurrent with the parcel map.

As a condition of approval of a tentative map, there may be imposed a requirement that improvements installed by the subdivider for the benefit of the subdivision contain supplemental size, capacity, number or length for the benefit of property not within the subdivision and that those improvements be dedicated to the public, subject to the provisions of Sections 66485-66489 of the Subdivision Map Act.

Completion of improvements shall be in accordance with §10-1.811.

  1. Frontage Improvements. The frontage of each lot shall be improved to its ultimate adopted geometric section, including street structural section, curbs, sidewalks, driveway approaches and transitions. Crosses shall be placed on the top of the street curb, if any, at the intersection of the extension of the property line of each lot and the curb location.

  2. Storm Drainage. Storm water runoff from the subdivision shall be collected and conveyed by an approved storm drain system. The storm drain system shall be designed for ultimate development of the watershed. The storm drain system shall provide for the protection of abutting and off-site properties that would be adversely affected by any increase in runoff attributed to the development. Off-site storm drain improvements may be required to satisfy this requirement.

  3. Sanitary Sewers. Each unit or lot within the subdivision shall be served by a community sewer collection system as required by Section 10-7.104 of this code, unless an individual system is permitted thereunder.

  4. Water Supply. Each unit or lot within the subdivision shall be served by an approved domestic water system.

  5. Utilities. Each unit or lot within the subdivision shall be served by gas (if required), electric, telephone and cable television facilities.

a. Underground Utilities.

All existing and proposed utilities within the subdivision and along either side of peripheral streets shall be placed underground except those facilities exempted by the Public Utilities Commission Regulations and as otherwise provided below.

(1) If the subdivision is in the Core Area, as designated in the General Plan, all utility lines along peripheral streets shall be undergrounded or an in lieu of undergrounding fee shall be paid. Undergrounding shall be required for overhead lines on either side of the peripheral street. The amount of the in lieu fee shall be one-half of the normal cost of undergrounding of existing utility lines along residential streets.

In lieu fees shall be deposited in a special undergrounding account to be used as approved by the City Council for future undergrounding of overhead utility lines within the Core Area.

(2) If the subdivision is outside the Core Area, undergrounding overhead utilities on peripheral streets shall not be required unless the City Engineer finds that undergrounding of such utilities is likely to occur within the ten-year period following approval of the tentative map. The subdivider shall be required as a condition of tentative or

vesting tentative map approval to pay a fee in lieu of undergrounding such utilities. The amount of the fee shall be according to section (a) above.

The in lieu fee collected shall be used only for the undergrounding of utilities along streets peripheral to and/or adjacent to the subdivision from which the fees were collected. If the fee is not used within the ten-year period following approval of the tentative or vesting tentative map, the subdivider who paid the fee may, within the eleventh year following approval of the tentative map, request that the in lieu fee be refunded, and the City shall do so.

  1. Off-Site Improvements. If the subdivider is required to construct off-site improvements on land in which neither the City or the subdivider have sufficient title or interest to allow construction, the City shall, within 120 days of recording the final map acquire by negotiation or commence condemnation of the land. If the City fails to meet the 120-day time limit, the condition for the construction shall be waived. Prior to approval of the final map, the City may require the subdivider to enter into an agreement to complete the off-site improvements at the time the City acquires title or interest in the land.

The subdivider shall pay the cost of acquiring off-site land or an interest in the land required to construct the offsite improvements.