A San Bruno price comparison should establish the space and ownership rights behind each sale before calculating a price per square foot. Lower-level conversions, parking changes, shared expenses and property-specific aircraft-noise information can make apparently similar homes poor substitutes. The professional analysis needs evidence of those differences at the transaction date, not assumptions drawn from a citywide median or current listing photographs.
No permissioned closed-sale dataset or named broker analysis was supplied for this draft. The verified sale sample is zero, and no current price range, market trend or dollar adjustment is asserted. This is an unpriced local screening guide using actual City records and official research routes. Connect it with the San Bruno guide, San Mateo County guide and selling process before requesting a property-specific pricing analysis.
Describe the subject’s documented configuration
Begin with the interest being sold, parcel or unit identifier, documented dwelling use and measured configuration. Identify parking, storage, outdoor rights and significant private or shared obligations separately. Do not treat an enclosed room, furnished lower level or garage conversion as approved living area without the relevant evidence. If descriptions differ among the assessor, approved plans and current marketing, state the discrepancy and investigate it before choosing comparable sales.
The City’s March 2026 architectural-review material for 490 Oak Avenue illustrates a lower-level use-conversion question. It is a proposal reference, not a sale or a construction-completion record. For a priced analysis, obtain the actual decision, approved revisions and final evidence needed to establish the configuration being valued. A proposal’s potential area should not be silently combined with the existing house when describing the subject or a transaction used for comparison.
Also separate present rights from hoped-for changes. The ability to imagine an additional dwelling, larger garage or outdoor improvement does not establish its approval, cost or market contribution. Ask the responsible agency and qualified professionals about the actual proposal before presenting future capacity as a verified feature. A buyer may value flexibility, but a precise pricing adjustment requires more than a conceptual drawing or a neighbor’s project history.
Original San Bruno comparable-property evidence screen
| Local evidence issue | Actual primary reference | Information needed for a priced comparison | Unsupported inference |
|---|---|---|---|
| Lower-level space | 490 Oak Avenue, AR26-006 | Transaction-date configuration and approval/completion evidence | Proposed conversion already contributes completed living area |
| Condominium rights | City study identifies Shelter Creek and Peninsula Place | Actual unit boundaries, parking, services, reserves and insurance | Same city or condominium label makes units equivalent |
| Public versus private improvements | Shelter Creek/Portola public infrastructure project | Actual completed scope and separate private component evidence | Public work renewed every private pipe |
| Aircraft-noise and insulation claims | SFO Noise Office | Property-specific information, actual treatment records and relevant market evidence | City name or program presence establishes a standard price adjustment |
| Every proposed transaction | Permitted verified sale source still required | Closing, contract date, interest, condition, concessions and reproduction rights | Listing price or public proposal is a closed comparable sale |
Choose legal and physical matches before map proximity
Fannie Mae’s comparable-selection guidance emphasizes physical and legal characteristics and an explained market-area choice. That discipline helps a seller evaluate proposed comparisons even though a formal loan appraisal is a separate assignment. Ask why the selected sale would appeal to a buyer considering the subject. A very close address is not necessarily a better match than a more similar property in a genuinely competing setting.
For a condominium, start with appropriate evidence from the same project when available, then examine competing developments rather than combining every local unit. Shelter Creek and Peninsula Place are verified local condominium examples, but their current private obligations are not established here. Request the actual project and unit information before assuming comparable maintenance, services or access. Explain a broader search if a limited reliable sample makes it necessary.
For a house, compare how verified living space meets the lot and street. Distinguish usable outdoor areas, stairs, garage function and the parking rights actually conveyed. A driveway arrangement that works for one vehicle may differ from another property despite the same advertised space count. Ask what the record and authorized observation establish. Do not assign a parking premium based solely on a photograph of vehicles occupying an area.
Describe condition at the sale date
Separate cosmetic updates from documented work to roof, plumbing, electrical or structural systems. An older permit can establish a particular scope without showing current condition; a current inspection may describe a condition that differed when the comparable sold. Obtain reliable dated information for the transaction being analyzed. If a key feature cannot be verified, disclose the uncertainty and reconsider the weight assigned to that sale.
Use the City’s archive and current permit routes to investigate significant alterations. Its Parcel Information page still links older resources, while current SB Permits guidance describes MGO for active permit activity. Ask staff which source contains the record you need rather than assuming all history is in one portal. An unsuccessful search should be described accurately. It does not independently establish that an improvement was unapproved or that the listed area was lawful.
The City’s public Shelter Creek and Portola project also illustrates why improvement claims need boundaries. A public main or trunk-line repair is a different feature from private plumbing renewal. If marketing or a comparable description relies on recent infrastructure work, identify what was actually completed and how it relates to the property. Avoid valuing an owner-maintained component as new because a nearby public project has a similar service name.
Review association costs through included services
A regular association payment is not a direct measure of relative value. Determine what it funds, which repairs remain with owners and what documented capital work is pending. Compare current budgets, reserve information and insurance through the appropriate professionals. Do not treat a lower assessment as an automatic premium or subtract a potential project estimate from every unit’s value without evidence of the actual obligation and market response.
San Bruno’s current billing structure also matters when reading owner expenses. Sewer charges are on the County tax roll, while water and refuse follow separate billing routes. A cost comparison can be distorted if one property’s payment is counted through an assessment and again as a standalone bill. Reconcile the actual statements before using expenses to interpret buyer alternatives. The public tariff and a development’s name do not establish an individual unit’s allocation.
Investigate aircraft-noise information at the property level
SFO’s Noise Office offers flight information for people considering a home near the airport. Use that official source and dated property observations to understand the question being evaluated. Do not infer identical exposure from the words San Bruno or apply a citywide discount. Room orientation, the way outdoor areas are used and the household’s window habits can affect the practical decision, while a pricing adjustment still requires relevant market evidence.
If sound-insulation improvements are claimed, obtain the property’s actual records. SFO’s program page describes eligibility and treatment for qualifying homes; it does not establish that every nearby property participated or will qualify in a future phase. Identify the windows, doors or ventilation equipment involved and their current condition. Neither program participation nor a particular contour label independently supplies a standard dollar premium or guarantees a buyer’s experience.
A short visit cannot capture every aircraft operating pattern. Explain the limits of observations and request appropriate information or assessment where the issue is material. In a future priced analysis, the professional should distinguish the physical evidence from a supported interpretation of buyer behavior. An invented adjustment would create apparent precision while leaving the underlying question unresolved.
Verify the transactions and document the sample
Obtain permissioned transaction data and verify the closing, interest conveyed, condition, contract date and available concessions through reliable sources. Use recorded documents and other permitted evidence where appropriate, with qualified help. A transfer record may establish a recording without explaining every term. Active listings and pending contracts have different evidentiary roles and should not be reported as completed sales. Keep the rights to reproduce any compiled data, remarks or photographs clear.
Declare the effective pricing date, search period, candidate count, exclusions and final verified sample before publishing a numerical result. Explain why an apparently nearby sale was excluded if its configuration or terms could not be established. For a small set of unusual properties, the exclusion log can reveal where the evidence is thin. Do not enlarge or narrow the sample silently to obtain a preferred conclusion.
Require support for adjustments and weighting
Fannie Mae’s adjustment guidance calls for market-based evidence, including support for time adjustments. Ask the pricing professional how each material difference was handled and why some transactions received more weight. Construction cost, a broad county trend or an attractive feature does not automatically justify a round-number adjustment. Where a difference cannot be isolated confidently, the limitation should remain visible.
The finished analysis should connect the documented subject to a verified sample and a reasoned conclusion. This unpriced guide prepares that work without presenting a neighborhood price claim. For a San Bruno seller, clear configuration and ownership records help the professional describe the home accurately. For a buyer, the same evidence makes it easier to distinguish a strong comparison from a nearby transaction that represents a different purchase.
