Commission Receives Training on Subdivision Rules, Bonds and State Limits on Nonpublic Improvement Bonding

West Jordan planning staff gave commissioners a detailed training Dec. 17 on subdivision standards, lot-line adjustments, and improvement guarantees that developers must provide when building public infrastructure.

Larry Gardner, a city staff presenter, opened the training by defining an improvement guarantee: “An improvement guarantee is basically a bond posted with the city,” he said, and explained it primarily secures public infrastructure such as streets, water, sewer and sidewalks. Gardner told commissioners the city requires bonds to ensure work meets adopted engineering standards and to protect residents from the long-term maintenance costs of substandard construction.

Staff reviewed several substantive points: minor subdivisions are nine lots or fewer with no dedication to the city; major subdivisions are 10 lots or more or any subdivision that dedicates right-of-way or public improvements to the city. Gardner explained recent state changes broadened lot-line adjustments, allowing an LLA between a lot and a parcel recorded outside a subdivision, a change the city incorporated into its ordinance last summer.

On plat and servicing requirements, staff said plats must show lot layout, legal descriptions, dedications and signatures before county recording; utility and transportation departments review designs for “ability to service” prior to zoning and subdivision approval. The city’s engineering standards — based on professional guidelines such as AASHTO — standardize road sections, utilities and turnaround widths so maintenance, garbage pickup and emergency access are consistent.

Staff explained bonding rules and customary practices: under state law municipalities may require bonds for public improvements (streets, utilities, sidewalks) but cannot require bonds for nonpublic improvements (landscaping, private playground equipment). Bonds typically carry a one-year warranty period after acceptance to cover defects; larger projects commonly use a construct-first approach in which the developer constructs improvements and posts a reduced guarantee (often 10% of full value) while recording the plat, or alternatively posts full security before recording. Security forms include cash, letters of credit and, less commonly, surety bonds through insurance companies.

Duncan Murray, the city attorney, cautioned about surety bonds issued by insurance companies: “That doesn't protect the city very well — you have to make a claim and it can be denied or delayed,” he said, noting that in practice cash or bank-secured letters of credit provide more immediate access to funds if the city needs to complete unfinished work. Murray and Gardner said the legislature has discussed making surety bonds an option and that it may return as a topic in upcoming sessions; staff advised commissioners that such bills can increase the risk that incomplete improvements leave the city to finish work.

No formal action was taken; staff encouraged commissioners to bring questions about draft legislation or proposed code changes to planning staff and the city attorney for clarification.