Sources and verification
Every figure this site publishes is traceable to one of the pages below, with the date we read it. Sources marked as commercial are published by businesses that sell the work; we quote them where no independent figure exists, and we say so on the page. The next figure due for re-checking is due 2027-03-22. A machine-readable copy of every fact is at /api/facts.
government
- British Columbia Building Code 2018, Division B, Section 9.14 — DrainageProvince of British Columbia (BC Codes) · read 2026-09-22
- Plumbing permits — what needs one and who may do the workDistrict of Saanich · read 2026-09-22
- Plumbing permitsCity of Victoria · read 2026-09-22
- Required Building Inspections (0021BLDG2021, 27 May 2022)City of Victoria, Permits and Inspections Division · read 2026-09-22
- Stormwater utility and the Rainwater Rewards programmeCity of Victoria · read 2026-09-22
- BCAB #1226 — Area drains (18 December 1990)Building Code Appeal Board, Province of British Columbia · read 2026-09-22
- BCAB #2000 — Foundation wall drainage at interior locations (18 June 2026)Building Code Appeal Board, Province of British Columbia · read 2026-09-22
- Stormwater: homeowner responsibilitiesDistrict of Saanich, Engineering Department · read 2026-09-22
- Storm drain open data: lateral lines, cleanouts, outfalls and catchmentsCity of Victoria Open Data Portal · read 2026-09-22
- British Columbia Building Code 2018, Division B, Section 9.18 — Crawl SpacesProvince of British Columbia (BC Codes) · read 2026-09-22
- BCAB #1373 — Ground cover in a crawl space (16 December 1994)Building Code Appeal Board, Province of British Columbia · read 2026-09-22
- BCAB #1345 — Location of foundation perimeter drain pipe (18 April 1994)Building Code Appeal Board, Province of British Columbia · read 2026-09-22
- Plumbing permitsDistrict of Oak Bay · read 2026-09-22
- Application for Plumbing Permit (April 2023)Township of Esquimalt · read 2026-09-22
- Drainage Connection Permit Application (November 2019)Town of View Royal · read 2026-09-22
- Building permits and application formsCity of Colwood · read 2026-09-22
- Building permitsCity of Langford · read 2026-09-22
- Plumbing Permit Application (November 2024)District of Metchosin · read 2026-09-22
- Building and renovating: when a permit is requiredDistrict of Sooke · read 2026-09-22
- Building permits and inspectionsDistrict of Highlands · read 2026-09-22
- Residential permitsDistrict of Central Saanich · read 2026-09-22
- Building and Plumbing Bylaw No. 1150, consolidated to 18 March 2019District of North Saanich · read 2026-09-22
- Building permits and inspectionsTown of Sidney · read 2026-09-22
secondary
- Common drainage questionsRainTek Drainage & Waterproofing (Victoria) · read 2026-09-22 · published by a business that sells this work
- Perimeter drain replacement cost in VancouverHydroPro Plumbing (Vancouver) · read 2026-09-22 · published by a business that sells this work
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