Identify the Existing Drainage System Before Replacing It

Collect available plans, permits, invoices, inspection reports, photographs and owner or strata records. Sort them by date and identify which building version each document represents. Additions, decks, paving, landscaping, service work and basement alterations may have changed access or drainage without appearing in the oldest drawing. A historical note can guide questions but should not be treated as proof of current pipe material or routing. Create a one-page chronology that separates documented work from recollection and marks every missing period that could affect the proposed investigation. Distinguish the City's public permit history from a retained-plan search before commissioning new investigation. The City requires owner permission for a plan search; confirm who will request it and retain the results. Older plan sets can omit relevant drawings, and condominium plans may show only typical layouts. Treat missing or generic plans as unresolved evidence, not confirmation of the buried drainage route.

Date every plan and invoice

Map additions and exterior changes

Separate documents from recollection

From safe, intended access points, list cleanouts, sumps, pumps, downspouts, catch basins, window wells and visible pipe. Photograph each item with a location label and record any readable material marking without scraping, cutting or disturbing it. One visible component does not establish the construction of concealed branches or the entire perimeter. Note whether each feature appears active, abandoned or unknown only as an observation. Keep surface drainage and building plumbing components in separate layers so later reviewers can challenge a mistaken connection assumption.

Label every visible component

Record markings without disturbing materials

Do not generalize from one exposed section

Use three line styles on the property sketch: confirmed by records or locating, reported by a prior source, and unknown. Show known access direction, inspected distance, sumps, potential outlets and areas blocked by finishes or site improvements. Do not connect two visible points on the drawing unless evidence supports the route. If an earlier report describes a connection without photographs or measurements, retain the claim and its source but label it reported. This map prevents unverified assumptions from becoming fixed quantities in an estimate.

Use evidence-status line styles

Show blocked and unviewed sections

Keep unsupported connections unresolved

Property age can prompt research, but it cannot identify a buried pipe or establish that every segment was installed at the same time. Repairs and additions may introduce different materials, grades, connections or access points. Ask the investigation to document observed material and transition locations where possible. Do not publish or accept claims that all Victoria houses of a certain era have one drainage type or inevitably require full replacement. The decision should follow property-specific evidence, not a neighbourhood generalization or a visual guess based on one accessible fitting.

Treat property age as context only

Document material transitions

Reject neighbourhood-wide assumptions

If records or the City indicate that a property is protected or subject to heritage requirements, route alteration questions through the current City process before finalizing work. Victoria's heritage-conservation information explains that protected properties can require review of proposed alterations. This page does not determine status, significance or the need for a heritage alteration permit. Keep the property identifier, dated City response and any conditions in the file. Do not market drainage work as heritage expertise unless that qualification and the applicable role can be verified independently.

Confirm status from current records

Keep authority responses with the scope

Do not infer heritage approval

For each unknown segment, list the least disruptive evidence that could change the decision: record search, locating, existing cleanout access, camera inspection, limited exposure or qualified review of an interface. State what each method can and cannot establish. An inaccessible camera route is a documented limit, not proof of failure, and a clear viewed segment does not clear the unviewed perimeter. Price optional evidence separately from construction so the owner can see its cost, purpose and effect on repair or replacement boundaries.

Connect each method to a question

Record access and visibility limits

Price investigation separately

Assemble the chronology, component inventory, route map, inspection material, status checks and unresolved questions into one indexed file. Give it to every bidder and require proposals to identify which records support their scope. Continue to the inspection page for deliverables, the tight-access page for urban constraints, the replacement page for the assembly and the permit-and-quote page for authority and pricing rows. After work, add photographs, inspection records and any unchanged segments so the next owner or strata council inherits evidence rather than another undocumented assumption.

Use one file across all estimates

Require evidence-linked scope boundaries

Carry the dossier into closeout