A Colma ownership budget should identify which bill collects each expense before it adds the numbers. The County’s annual property bill can already include Colma sewer charges and a fire special tax. An association assessment may include some shared services but leave others to the owner. A water tariff may show a current rate without predicting the household’s consumption or the next year’s changes. These distinctions prevent a convincing-looking budget from counting the same service twice.
This article compares two actual public annual bills for fiscal year 2026–27: 417 B Street, APN 008-125-360, and Verano Condominium unit U-46 at 1299 Mission Road, APN 010-460-460. It then adds a separate hypothetical Cal Water sensitivity exercise. These are selected documented inputs, not complete household budgets, current market values or predictions of a buyer’s future expenses. Research was checked October 26, 2026.
Read the current bills as records of different properties
The 417 B Street annual bill, number 2026-217485, shows $6,852.06 in ad valorem taxes and $1,516.02 in direct charges and assessments, totaling $8,368.08. A monthly planning equivalent is $697.34. That division is a savings-allocation illustration; it does not change the County’s actual installment schedule or turn an annual bill into monthly billing.
The 1299 Mission Road annual bill, number 2026-228892, shows $11,345.78 in ad valorem taxes and $1,156.68 in direct charges, totaling $12,502.46. Dividing by twelve produces $1,041.87 when rounded to cents. The larger annual amount is a result for this assessed account, not evidence that all Colma condominium owners pay more tax than detached-house owners.
Even the displayed ad valorem rates differ: 1.1625 percent in tax-rate area 007007 for B Street and 1.078 percent in area 007005 for Mission Road. The underlying assessment histories also differ. Avoid applying either existing owner’s annual bill to a new purchase price. Obtain an address-specific estimate for the buyer’s circumstances and separate any supplemental bills. The County’s public account route distinguishes annual and supplemental entries; they should not be silently merged into a recurring annual allowance.
The underlying line items explain why a single townwide shortcut is weak. The B Street bill lists Jefferson district bond and parcel-tax entries, while the Mission Road bill lists a South San Francisco district bond entry. These are observed billing differences, not a school-assignment determination for a household. Retain the actual levying-authority lines and obtain the relevant district’s answer for any separate education or exemption question.
Reconcile the sewer charge before adding utilities
The B Street bill includes $1,021.76 for Colma sewer. The Town’s June 9, 2026 engineering report independently shows that address in an NSM residential category with $746.42 in treatment and $275.34 in collection charges. Its water-conservation incentive is zero, leaving the same $1,021.76 final charge. This reconciliation establishes what is already inside the selected annual bill.
The Mission Road bill includes $923.72 for Colma sewer. The engineering schedule lists $839 in SSF treatment and $84.72 in collection charges, also with a zero incentive. Those components sum to the bill’s amount. The two examples therefore involve different treatment categories even though the County collects each under a Colma sewer item. A neighboring property’s charge or a general sewer rate cannot substitute for the actual account’s calculation.
If the worksheet starts with the full $8,368.08 or $12,502.46 annual tax total, it must not add those sewer amounts again. An explanatory breakout is helpful only if it leaves the grand total unchanged. The same issue applies to the $201.02 Colma fire special tax shown in each bill. That tax is a public charge, not a homeowners-insurance premium or proof of a particular property’s insurance availability.
Use the correct water schedule and identify the exclusions
Cal Water’s Bayshore index includes Colma and links the current Bay Area Region schedules. First confirm the actual provider, meter and customer class. A unit in a shared arrangement may not have an independently billed single-family account. Do not apply the following residential model to a master meter, common-area service or a different tariff merely because the mailing address says Colma.
The October 1, 2026 BAR-1-R schedule lists a $35.24 monthly service charge for a 5/8 by 3/4-inch meter. Its first six CCF cost $4.3026 each, the next three cost $17.1918 each and the next four cost $21.5564 each. One CCF is approximately 748 gallons. The schedule states that it is effective subject to refund pending final Commission approval.
For a hypothetical six-CCF month using that meter, base service plus quantity charges are $35.24 plus six times $4.3026, or $61.06 after rounding. At ten CCF, the calculation adds three units at the second tier and one at the third, producing $134.19. These figures exclude the applicable UF, RSF, CAP and AS charges or credits and any other account-specific adjustment. They are not complete water bills.
| Input | 417 B Street | 1299 Mission Road, unit U-46 | Interpretation |
|---|---|---|---|
| APN / tax-rate area | 008-125-360 / 007007 | 010-460-460 / 007005 | Different accounts; no townwide average implied. |
| Ad valorem taxes | $6,852.06 | $11,345.78 | Current assessed accounts, not future purchase-based estimates. |
| Direct charges | $1,516.02 | $1,156.68 | Already include sewer and fire items below. |
| Total annual bill / monthly planning equivalent | $8,368.08 / $697.34 | $12,502.46 / $1,041.87 | Annual total divided by twelve; not a monthly billing option. |
| Sewer included above | $1,021.76 = $746.42 NSM treatment + $275.34 collection | $923.72 = $839 SSF treatment + $84.72 collection | Report shows zero conservation incentive for both; do not add again. |
| Fire special tax included above | $201.02 | $201.02 | Not insurance. |
| Scenario | Monthly base only | Twelve-month constant-rate illustration | Missing inputs |
|---|---|---|---|
| 5/8 by 3/4-inch meter, 6 CCF | $61.06 | $732.72 | Actual usage, applicable adders/credits and future tariff changes. |
| Same meter, 10 CCF | $134.19 | $1,610.28 | Same exclusions; hypothetical monthly usage held constant. |
| Usage-scenario difference | $73.13 | $877.56 | Not a measured conservation saving at either home. |
| 3/4-inch instead of 5/8 by 3/4-inch meter, same usage | Service charge rises by $17.63 | $211.56 additional base service | Actual meter and class require utility confirmation. |
Tax links: B Street and Mission Road. All amounts checked October 26, 2026. Blank private expenses must be filled before computing a household total.
Keep the model’s time period honest
Multiplying the rounded monthly base amounts by twelve gives $732.72 and $1,610.28, a difference of $877.56. This holds both hypothetical usage and the selected tariff constant. It is a sensitivity illustration rather than an October 2026–September 2027 forecast. A real year can include seasonal consumption, a changed tariff and different applicable adjustments. Retain the rate’s effective date next to the calculation so an outdated model is easy to recognize.
Meter size matters independently of usage. The schedule’s ordinary 3/4-inch service charge is $52.87 monthly, $17.63 more than the selected smaller-meter charge. At unchanged rates, that difference is $211.56 over twelve months before adders. Confirm the actual meter designation with the utility; do not infer it from pipe appearance or replace it with a fire-sprinkler category without establishing that category’s eligibility for the account.
Complete the property-specific expenses with actual evidence
For the Verano example, the County unit description does not provide association dues or determine which services they include. Obtain the current assessment schedule, budget, reserve information and insurance disclosures for the offered unit. Keep recurring assessments separate from any actual special assessment and identify the payer for each utility. No private association figure is entered into this comparison, so the table should not be read as the condominium’s total cost of ownership.
For the B Street example, the dated conversion record creates a practical scope question for insurance and maintenance. Describe the actual approved and completed configuration to the relevant providers rather than quoting coverage for a different use. Obtain current permit finals and appropriate inspections before budgeting a repair or relying on rental income. The annual progress report’s 2025 permit milestone does not establish the October 2026 physical condition.
Insurance, energy, refuse, maintenance and capital work need their own evidence. Request a quote for the actual property and intended use, then identify deductibles, exclusions and scope. For repairs, separate a contractor’s current proposal from a planning allowance and recurring upkeep from one-time work. Leave an unknown amount visible rather than filling the gap with another Peninsula city’s fee or an unsupported percentage of home value.
Finish by recording each input’s period, source, payer and whether it is already included elsewhere. Only then combine recurring costs and keep contingent or one-time work separately identified. The Colma hub and San Mateo County guide provide local context; the financing guide helps frame the lender discussion. The useful result is a traceable address-specific budget, with no hidden assumptions presented as bills.
