A utility will-serve letter does not automatically establish a capacity reservation. It may confirm potential service while leaving agreements, payments or construction unresolved. The utility's documents define its commitment, as Toho's May 6, 2025 availability letter illustrates.

For a land buyer, those unresolved obligations affect both the utility budget and the planned delivery date. The water and sewer examples below show how particular documents divide those obligations; their terms do not govern every utility.

Separate availability, reservation and delivery

Read a will-serve or availability letter for three answers:

• Availability: What service does the utility say it can provide, for which property and proposed demand?
• Reservation: What document or completed action allocates capacity to this project, and for how long?
• Delivery: What must still happen before the utility can connect and serve the homes?

Record each answer separately in the acquisition analysis. A favorable availability finding supports a different budget assumption from a completed reservation with a defined construction scope. A reservation should become a connection date in the schedule only when the documents support that date.

What Toho's availability letter left unresolved

Tohopekaliga Water Authority's May 6, 2025 letter identified capacity through existing facilities and planned expansions, but reserved none. Reservation depended on an executed Development Service Agreement, approved plans, Florida Department of Environmental Protection permits and agreement conditions, including system development charges. Owner-funded extensions or upsizing could also be required. Toho availability letter.

Polk County included the letter in its December 3, 2025 planning agenda record for a proposed institutional subdistrict change associated with a high school. It is a development example, not a residential subdivision approval. Polk County file 25-2214.

For a builder reviewing similar wording, the next question is which planned improvement the project depends on. Obtain its required completion milestone and identify who bears the consequences of delay before relying on a capital improvement plan to support a service date.

Which document reserves capacity?

Aqua Water Supply Corporation's developer guide, updated August 21, 2025, says securing capacity requires an executed Water Service Agreement and the required payments; board approval alone is insufficient. For residential subdivisions, it names an Agreement to Construct Facilities and Reserve Capacity. It also describes a simpler reservation agreement for qualifying projects needing neither improvements nor an internal distribution system. Aqua developer guide, pages 11 and 15.

Ask your utility to identify the agreement that applies to your project and the conditions that make the reservation effective. Read it alongside the governing tariff—the utility's rates and service conditions—and project correspondence. Aqua's guide says its tariff prevails over conflicting guidance. Aqua developer guide, page 3.

Compare the agreement with the proposed site plan: check the parcel, service type, demand allowance and development phases. Ask whether a change in density, ownership or phasing requires consent, a new study or an amended agreement.

Then obtain written confirmation of the reservation's status, including any unpaid charges or unmet conditions. Keep it with the executed agreement and payment evidence so the acquisition team can see what remains unresolved.

Who pays for off-site utility upgrades, and when?

Separate physical construction costs from charges for access to system capacity. For your infrastructure and construction cost plan, request a written allocation of costs rather than one combined “utilities” allowance.

Who manages the work and who pays for it are separate questions. Ask whether utility-managed construction leaves the developer responsible for actual costs, overruns or a final adjustment.

Aqua's guide calls for refunding surplus construction funds and collecting shortfalls after reconciliation. It also distinguishes upfront reservation fees from system development fees paid when individual lot owners apply for service. Aqua developer guide, pages 14–15.

For any proposed reimbursement or fee credit, request the written entitlement, calculation and payment trigger. Show uncertain recoveries separately from the cash needed to complete construction: a possible future repayment does not reduce the amount that must be funded now.

How expiration and fee dates affect the schedule

Put the letter's expiration date, reservation term and construction milestones on the same calendar as land closing and the first planned home delivery. For each deadline, record what must be completed—not merely submitted—and whether an extension requires approval.

Aqua's guide illustrates why each deadline needs its own starting event:

• Feasibility-study validity: The study remains valid for 90 days after issuance.
• Legal-deposit deadline: If the legal deposit is not paid within 90 days of the approved resolution date, both the feasibility study and board resolution are considered expired.

These are separate provisions on page 11 of Aqua's guide. Record both dates and ask Aqua to confirm how they apply to the project. The legal-deposit deadline is distinct from the study's expiration date measured from issuance. Payment of that deposit is not proof that capacity has been reserved.

A reserved quantity also needs to be distinguished from a fixed price. Aqua's December 5, 2025 notice announced system development fees of $8,400 per living unit equivalent effective June 1, 2026, and $9,700 effective June 1, 2027. The notice says fees are assessed when each phase or lot connects. Aqua's dated fee schedule.

Before budgeting those charges, establish whether the project agreement fixes any fee or whether the connection-date schedule applies.

A hypothetical 20-home budget

Assume each home counts as one living unit equivalent, all 20 connections fall under the announced schedule, and there is no contractual price protection. The system development fee subtotal would be $168,000 at $8,400 each, compared with $194,000 at $9,700 each—a $26,000 difference. This calculation uses the published schedule and excludes reservation charges, construction and other fees; it is not a complete utility quote.

Separately, assume an extension deposit is $120,000 but the agreement makes the developer responsible for a final $150,000 cost. The additional cash requirement is $30,000. These construction amounts are invented solely to illustrate reconciliation.

Before the land purchase becomes unconditional, have the civil engineer and a local real estate attorney review both exposures: charges tied to connection timing and obligations to pay actual construction costs. Carry the documented scope, funding requirements and deadlines into your land and development planning, alongside the broader evidence needed for a buildable lot.