Define the existing house before designing the change
A Moraga renovation often begins with a simple idea: expand a deck, turn an enclosed area into usable interior space, or improve the yard below a sloping house. Before commissioning a design, establish what the existing records actually describe. A space visible during a showing, a feature in a planning application and an improvement with completed building inspections are three different kinds of evidence. Combining them prematurely can make the proposed project appear more settled than it is.
The Moraga property guide explains why terrain and responsibility matter. This article focuses on the record work that comes before renovation feasibility. It uses actual Town and County documents checked October 26, 2026, with no private approved plan set, field inspection or agency determination for a reader’s property. The goal is an accurate brief for the designer and reviewers, not a promise that a particular expansion is permitted.
Confirm who reviews which part of the project
Inside incorporated Moraga, Town planning and County building review are distinct. The County permit gateway identifies its building service for Moraga; it does not make County planning rules for unincorporated land the Town’s zoning rules. Confirm the actual parcel jurisdiction, especially when a listing or database combines nearby community names. The county overview provides regional orientation without resolving that address-specific question.
For grading, the Town’s guidance describes initial design review followed usually by County technical review, permitting and inspections. It also describes a discretionary Town technical-review route. Ask the agencies which route applies to the proposed work before arranging submissions. A deck expansion that looks like a small architectural change may raise separate questions about supports, access, runoff or disturbed ground; the reviewer needs the actual scope rather than a project nickname.
Private review belongs on its own line. An association may have documents relevant to exterior changes, but a private committee’s approval is not a substitute for public permission. Conversely, a public project file may mention association review without including the actual letter or its conditions. Obtain the current private documents and ask the appropriate reviewer to identify their application. Keep those findings distinct from the Town and County record history.
A local deck proposal shows why area reconciliation matters
The April 15, 2025 staff packet for 1807 Saint Andrews Drive discusses alterations to upper and lower decks at a stepped hillside house. The upper-deck narrative gives 208 square feet existing plus 272 proposed, yet reports a total of 646. The stated components add to 480, leaving a 166-square-foot discrepancy. The lower-deck figures, 104 existing plus 104 proposed, do add to the stated 208.
This review has not resolved the upper-deck discrepancy. The correct response is to request clarification against the relevant plans and final decision, rather than quietly changing either component. The packet contains a staff recommendation and draft resolution; it does not establish the verified final vote, building permit or completed configuration. The arithmetic comparison below is an editorial check of the narrative, not a certified measurement of a current deck.
For an owner, this kind of conflict can affect several later documents. A designer might start from one area, a contractor might price another and a seller might repeat the largest total. Put the conflict in the project brief before those numbers spread. Ask the designer to distinguish measured existing conditions from areas copied from older records. If the approved plan differs from the staff narrative, retain both documents and the explanation of which controls the proposed work.
Original existing-versus-proposed research crosswalk
| Record or calculation | What can be established | What must be obtained next |
|---|---|---|
| Saint Andrews upper deck | 208 + 272 = 480; reported 646 differs by 166 square feet | Agency clarification and controlling plans; no silent correction |
| Same packet, lower deck | 104 + 104 = 208 square feet in the proposal narrative | Final decision, building history and current measured conditions |
| Sanders permit pair | Two distinct scopes listed as issued, with shared-plan references | Approved revisions and inspection/final history for each scope |
| Current Town ADU page | Current ordinance route and separate draft prototype program | Applicable review track and property-specific building/utility requirements |
Neither a matched arithmetic total nor a planning recommendation proves current construction. Preserve source dates, revision numbers and unresolved conflicts in the working file.
Use permit numbers to separate the work streams
A second example appears in the County’s October 12–18, 2026 permit report. At 1159 Sanders Drive, BIAD26-008173 and BIMIR26-010363 are listed as issued October 15. The former includes interior work, a 64-square-foot conversion from unconditioned to conditioned space and a pergola; the latter covers retaining-wall work. The descriptions refer to shared plans. That connection does not establish that either permit independently covers every improvement on the property.
Create a separate row for each proposed intervention in the reader’s project: interior conversion, exterior structure, wall, grading and drainage, for example. Match each to the relevant existing record, then identify the new approval or revision question. Keep “issued” separate from inspection milestones and final status. The report’s wall-height wording contains questionable units, which are not treated here as reliable dimensions. A designer would need the actual plans and site information before using that feature as an existing-condition assumption.
Do not use a permit valuation as a contractor’s price for the new project. Even when a report provides a number, the proposed scope, access conditions, materials and contract exclusions still need to be defined. A renovation budget assembled from unrelated permit valuations can hide exactly the site work that requires investigation. Obtain a scoped design and quote after the record questions are sufficiently clear for a contractor to price the intended work.
Use current ADU information rather than an old handout
The Town’s current ADU page states that its ordinance was amended July 8, 2026 and became effective August 7. It identifies different review tracks and directs applicants from Town planning approval to County building permits and relevant utility coordination. A buyer should therefore identify the actual project category before applying a simplified table to a hillside conversion or detached addition.
The same page describes shared Lamorinda prototype plans as drafts under review. A draft plan program is not a ready approval for a particular parcel. Treat a prototype as a possible design starting point only after confirming its current status and scope. Foundation design, access, drainage, existing structures and utility requirements still need an address-specific review. An attractive plan image does not answer whether it can be placed where the buyer hopes to build.
Build a research file a professional can use
Keep the proposed construction sequence in the file as well. If a wall must be rebuilt before an addition can proceed, the designer and contractor need to identify that dependency rather than pricing the addition as an isolated interior project. For a stepped house, also ask how occupants and workers would reach the lower work area while construction is underway. These are questions for the actual design team; the Saint Andrews and Sanders records do not establish a construction method or a suitable sequence for another property.
The County records-research form identifies categories including permit history, inspections, plans, structural and grading records. Plan viewing and copying may involve different permissions. No request was submitted for this article. Ask for identifiable material rather than a general assurance that “everything is permitted,” and record which categories the agency could not locate or release. The Town records gateway provides a separate route for records held by the Town.
Organize the results chronologically, with a current layout sketch at the front. Mark each item as existing, proposed, approved, issued, inspected or unresolved according to its actual evidence. A later document may revise an earlier design without replacing every sheet in the archive. Keep revision dates visible so that a professional can follow the sequence and identify the drawings needed for the next decision.
Before committing to the purchase or renovation, give the designer a short written statement of the intended use and the unresolved evidence. Specify whether a deck must connect to a yard, a room must become conditioned space or an accessory unit is essential to the plan. The buying guide helps place that investigation within the transaction. A useful feasibility conclusion explains what has been verified, what additional design or review is needed and which assumptions could materially change the project.
