California Subdivision Improvement Bonds Under the Subdivision Map Act

Section 66499.1 prescribes a faithful performance bond in substantially a set form, and §66499.2 does the same for the labor and materials bond. The performance form binds the principal and surety jointly and severally to the county or city, incorporates the improvement agreement and any alteration made under it and adds the agency's costs and reasonable attorney's fees of successful enforcement on top of the penal sum. Both forms carry a clause in which the surety agrees that no change, extension of time, alteration or addition to the agreement or the work affects its obligation, and waives notice of those changes.

That waiver is the clause developers most often overlook. An agency can grant a time extension on the improvement agreement without asking the surety, and the bond stays in force. The developer's indemnity to the surety stays in force with it. Many agencies publish their own bond forms; they usually track the statute, but a broker compares the agency form line by line against §66499.1 and §66499.2 before the surety signs, since an added indemnity, warranty term or insurance requirement can widen the bonded obligation beyond the Map Act form.

Section 66499.3 gives the legislative body a range, not a fixed number. Faithful performance security is set at not less than 50 percent nor more than 100 percent of the total estimated cost of the improvement, and payment security is an additional amount in the same range. Subdivision (d) adds a third piece many developers miss: an amount the legislative body finds necessary to guarantee and warrant the work for one year after completion and acceptance against defective work, labor or materials. Most agencies set those percentages by ordinance or standard condition, so the local code tells you the number before the conditions of approval do.

Two provisions can reduce what the developer posts. Under §66499.3(c), a California nonprofit corporation funded by a federal or state agency can avoid the standard amounts if, among other conditions, a letter of credit covers 100 percent of the improvement contract or the contractor bonds 100 percent for performance and at least 50 percent for payment to the nonprofit and the agency as co-obligees. Under §66499.5, when improvements are financed and built through special assessment proceedings, an agency may provide by ordinance that the subdivider's security is reduced by the amount of the contractor's assessment-act bonds.

Section 66499(a) lists five forms, at the agency's option and subject to its approval: corporate surety bonds; a deposit of money or qualifying negotiable bonds with the agency or a responsible escrow agent or trust company; an instrument of credit or letter of credit from a regulated financial institution; a lien on the property being divided when the agency finds the improvements need not be installed sooner than two years after the map records; and any other security, including real property security interests, that the agency accepts and specifies by ordinance.

Each form behaves differently once money is at stake. Section 66499.6 makes a cash deposit, negotiable bond or instrument of credit a trust fund that the depositor's creditors cannot reach until the obligation is performed. A lien or real property security interest under paragraphs (4) or (5) must be recorded, and under §66499(b) it attaches with the priority of a judgment lien in the amount needed to finish the improvements. That recorded lien can matter to a construction lender's title requirements, although the agency may release or subordinate it if completion is otherwise secured. A surety bond avoids both the cash lockup and the recorded encumbrance but brings underwriting and a general indemnity agreement.

Section 66499.9 limits liability on the faithful performance security to four things: the work in the agreement or the required act; changes or alterations that do not exceed 10 percent of the original estimated cost; a one-year guarantee and warranty after completion and acceptance against defective work, labor or materials; and costs and reasonable expenses and fees, including attorney's fees. Change orders that push the work beyond that 10 percent band are a reason to talk with the surety before the agency signs off, because the developer may need a rider or a new bond for the added scope.

The payment side has its own claimants. The §66499.2 form runs to contractors, subcontractors, laborers, material suppliers and others entitled to file claims under the Civil Code payment provisions beginning at Section 9000, and gives them a right of action on the bond. Section 66499.10 says where that suit goes: against the surety when the security is a bond, against the holder of a cash or negotiable-bond deposit, or against the financial institution on an instrument of credit. A developer whose site contractor falls behind on supplier payments can therefore see claims on its own bond, which is one reason sureties ask whether the site contractor is bonded to the developer.

Section 66499.7 sets the release sequence: performance security on final completion and acceptance, payment security reduced to recorded lien claims after the lien-recording period, and the warranty amount held through the warranty year. The 45-day partial release steps and the 200 percent and 20 percent rules are walked through in detail in our city release guide, so this page focuses on one California rule that often stalls closeout.

Under §66499.8, when performance of the secured obligation is subject to another agency's approval, the local agency may not release the security until the work satisfies that other agency. The other agency has two months after completion to register satisfaction or dissatisfaction, and silence after two months is conclusively deemed satisfaction. On tracts where a water district, sanitation district or flood control agency owns the finished facilities, the developer should send that agency a dated completion notice, because the two-month clock is what turns its inaction into a release the city can act on.

Not every division needs security at map recording. For a division that is not a subdivision of five or more lots, §66411.1 limits improvement requirements to dedications and reasonable on-site and off-site improvements for the parcels being created, and construction generally is not required until a permit or other approval for development of the parcel issues, or when a local agreement says so. The agency may require earlier completion only on a finding that it is needed for public health and safety or is a necessary prerequisite to orderly development of the surrounding area.

Off-site work on land the developer does not control has its own rule. Under §66462.5, a city or county may not postpone or refuse a final map because the subdivider has not built off-site improvements on land where neither it nor the agency holds sufficient title or interest. Unless the agency requires an agreement to complete those improvements once it acquires the interest, it must acquire the interest or begin eminent domain proceedings within 120 days of the final map filing, or the condition is conclusively waived. When the agency takes the agreement route, the developer's bond can stay open for off-site work whose start date depends on the agency, which a surety will want explained.

Map Act bonds are written on the developer's credit, so the file looks more like a loan package than a contractor prequalification. Sureties typically want entity and guarantor financial statements, a schedule of every open improvement bond by agency and phase, the draft improvement agreement and conditions of approval, the engineer's estimate the agency will use and the funding source for the improvements. They also want to know who is building the work and whether that contractor is bonded to the developer.

The agency's choice of percentages drives the total. A city that sets performance at 100 percent and payment at 50 percent, with a separate warranty amount, asks for well over the estimate in combined penal sums. Asking the agency early which percentages and forms it will use, and whether it accepts substitute bonds after a partial release, lets the developer size the bonding line before the final map is calendared.