Los Altos improvement records are most useful when the reader follows a specific scope through its stages. A garage conversion, a new garage and an ADU can appear at the same address while belonging to different permits. A residential-area column can also combine spaces whose descriptions differ. Before relying on a renovated floor plan, match the actual improvement to the correct permit number, approved drawings, revisions and completion evidence.
This guide uses actual entries in the City’s April 2026 issued-permit report. No private home was inspected and no final inspection record or permissioned building plan was obtained. The examples deepen the Los Altos guide by showing how to read the local records carefully. They establish what was listed as issued at that time, not what stands completed or approved for occupancy today.
405 Monterey Place: a conversion and replacement garage
The April list identifies BLD25-01703 at 405 Monterey Place, APN 17511018, issued April 10, 2026. Its description concerns conversion of the existing garage to living space and a new garage at the front. That is more informative than a generic remodel label. It tells the reader to investigate the relationship between newly occupied space, replacement parking accommodation and the actual approved site and floor plans.
For a purchase involving that work, ask which parts of the existing structure changed and what the approved version shows. Compare the retained garage, converted space and new work rather than treating the whole building as a single undifferentiated addition. No conclusion about structural adequacy, present parking or the current completion stage follows from the issuance list alone. Those questions need the appropriate records and current observations.
The permit number begins with a prior-year prefix while the report lists a 2026 issuance date. That is a practical reason to use the actual dated field rather than infer the entire construction chronology from a number. An application, issuance, revision and final inspection may occur in different periods. Preserve each date and source when reconstructing a seller’s improvement history.
519 West Portola Avenue: two permits on one parcel
At 519 West Portola Avenue, APN 16719031, the April report lists two separate permits issued April 28. BLD25-01673 concerns a detached garage, trellis and breezeway. BLD25-01674 concerns a detached ADU with a basement. The shared address does not make those one approval. A buyer relying on both improvements should obtain the relevant file for each and identify any conditions or dependencies between them.
The ADU description separates a 1,200-square-foot unit and a 1,200-square-foot basement, while the report’s residential-area column shows 2,400. Do not relabel that column as 2,400 square feet of above-grade ADU living accommodation. Ask the City and the qualified plan reviewer how the approved areas, uses and measurements are classified. The public report is an index to the question, not a substitute for interpreting the actual approved design.
A basement also introduces different research questions from a detached garage. Obtain the applicable construction-stage and completion records for the actual scope. The record does not establish that every basement has the same drainage system, equipment or finished use. If a buyer depends on particular accommodation, ask for the supported classification and current condition rather than filling gaps with assumptions about another Los Altos project.
Keep list categories separate from completed accommodation
The same City report identifies other additions, conversions and accessory work, showing why a total area field is not a full narrative of what changed. Use the description and the source document together, then retrieve the actual file where a purchase decision depends on details. Avoid summing every visible area figure across separate permits unless a qualified reviewer establishes that the categories are compatible and not overlapping.
The report’s stated construction valuation is also different from a contractor’s current price, money already paid or contribution to market value. This article does not use that column as a repair quote or a valuation adjustment. A buyer preparing a budget needs a scoped current estimate for the actual work, with its assumptions, rather than a permit-index amount collected for another purpose.
An original annotated permit walkthrough
The worksheet below ties the two actual addresses to the next evidence required. It does not fill missing fields with invented finals or private observations. Keep the listed permit numbers intact when asking for records and describe the particular use or improvement being investigated. That gives the City and the reviewing professional a clearer task than an unfocused request about all renovations.
| Actual record | Scope in the issued-permit list | Useful interpretation | Next evidence |
|---|---|---|---|
| 405 Monterey Place, BLD25-01703, issued April 10 | Existing garage converted to living space; new garage at front | Conversion and new parking accommodation need a coordinated plan review | Approved plans/revisions, relevant inspection history and final status |
| 519 W Portola Avenue, BLD25-01673, issued April 28 | Detached garage, trellis and breezeway | Separate accessory-structure record on the same parcel as the ADU permit | Correct scope, site relationship and its own applicable completion evidence |
| 519 W Portola Avenue, BLD25-01674, issued April 28 | Detached ADU plus basement | 2,400 in the area column does not establish 2,400 above-grade ADU living area | Approved classification/measurements, construction-stage records and final-signature evidence |
| Current private property condition | No inspection performed for this draft | Regulatory history and current performance are separate | Permissioned, scoped professional review of the actual systems and spaces |
Retrieve the actual file through the correct City route
Confirm that the land is within the City of Los Altos before using its Planning and Building services. Los Altos Hills is a separate municipality, and County property records do not replace City development review. The City’s Building page describes plan-check and inspection responsibilities. Its planning-submission lists and issued-permit archive are useful entry points, with different meanings and dates.
For missing records, the City’s records guidance provides the request route and asks for identifiable material. Include the permit number, address, APN and particular documents needed. No request has been submitted for a private owner through this article. Viewing or copying architectural plans may require separate arrangements and permissions; do not assume a public index authorizes reproduction of the plans.
Ask for the approved version and subsequent revisions rather than relying on an early drawing retained in the seller’s file. If a current layout differs, identify the discrepancy and ask the appropriate reviewer what further evidence is needed. A missing sheet or unsuccessful search is an information gap. It should not be converted automatically into a claim that the work is legal, illegal or eligible for uncomplicated approval.
Follow inspections beyond the issued stage
The City’s current handout gateway links required construction inspections and residential final requirements. These materials distinguish stages such as foundation, rough work and final review, and identify the role of approved plans and correction records. They are general guides, with scope and applicability limits; they do not certify either example’s completed inspections or establish every current code requirement for a new project.
The required-inspections handout describes the final signature on the building-permit inspection record as serving as the certificate of occupancy. Ask the City for the actual applicable completion evidence rather than looking only for a document with a preferred title. Other departmental approvals may also matter to the scope. No final signature or occupancy authorization was retrieved for the private examples used in this guide.
Keep current inspection separate from that history. A buyer’s evaluator can assess accessible conditions and identify further investigation needs, but should be given the relevant plans and known discrepancies. A past approval does not guarantee present concealed conditions or equipment performance. Conversely, a current observation should be evaluated on its merits instead of being dismissed because a permit number exists.
When several records share an address and issuance date, ask whether their completion paths are linked or independent. The matching date does not settle that relationship. At Portola Avenue, retaining both numbers helps prevent an answer about the garage from being mistaken for an answer about the ADU or basement. The follow-up should name the structure and record so the response can be used accurately.
Make the improvement chronology decision-ready
Finish with one line for each material improvement: actual space or system, permit, authorized scope, revisions, completion evidence and current review. For an addition-dependent purchase, identify the separate feasibility work still needed. For a seller, an organized chronology can explain the home accurately without treating every proposed drawing or unverified area figure as completed accommodation.
Use the Santa Clara County guide for wider context and the buying process to coordinate timing. Los Altos’ actual Monterey Place and Portola records show why the same-address and same-column shortcuts can mislead. A reliable file preserves those distinctions and obtains the individual evidence needed before an improvement becomes part of the purchase assumptions.
