Most garden suite projects in Greater Victoria stall on paperwork, not construction. A detached suite touches zoning, servicing, trees, the BC Energy Step Code, BC Housing warranty rules and at least four permits, and each municipality runs the process its own way. This checklist walks through the approvals in the order you will meet them, with the published rules for Saanich, the City of Victoria, Langford and Oak Bay. For what the suite itself costs, see our garden suite cost guide; this page is about getting it approved.
Step 1: Confirm your lot qualifies before you design
Every municipality starts with a lot test, and the tests differ. Check yours on the municipal map before paying a designer.
| Rule | Saanich | City of Victoria | Langford | Oak Bay |
|---|---|---|---|---|
| Where allowed | RS or RD zone, inside the Sewer Service Area and/or Urban Containment Boundary | Schedule M; not where the house already has a secondary suite; SSMUH lots follow s.52 instead | Zoning Bylaw 300, Part 3; one suite per lot unless Part 6 allows more | R-1 to R-5 zones as an accessory dwelling unit under the 2024 infill amendments |
| Minimum lot | 400 m2 and 12 m wide; principal building must be a single family dwelling | Set by Schedule M; confirm with the City | Over 400 m2 (carriage suite: over 1,000 m2) | No separate minimum stated; heritage-designated lots are limited to 2 units |
| Maximum floor area | 93 m2 gross floor area | 37 m2; 56 m2 on a plus site (corner, two frontages or rear lane) | 65 m2 (carriage suite 90 m2) | Set by zone floor area ratio, not a fixed cap |
| Maximum height | Sloped roof: 4.2 m single storey, 6.5 m two storey. Flat roof: 4.2 m or 5.5 m | 3.5 m; 4.2 m and 1.5 storeys on a plus site | 4.5 m | 6.0 m roof height, 4.4 m building height (4.2 m in R-4), two storeys |
| Setbacks | 1.5 m rear and interior side (3 m if two storeys), 4 m from the house, 1 m pathway to the street | Per Schedule M | Per Part 3 and the zone | 1.5 m rear and interior side for an accessory dwelling unit |
| Existing suite in the house | Both a secondary suite and a garden suite are allowed | Garden suite not permitted where a secondary suite exists (outside SSMUH lots) | An existing suite must be decommissioned before the garden suite permit unless the zone allows both | Allowed within the unit count (a house with a suite and a detached unit is 3 units) |
Two things trip owners in Saanich. The 12 m lot width is measured at the zone's minimum-width line, not at the street, and private covenants on title can prohibit a garden suite even on an eligible lot. Pull the title early. In Langford, Bylaw 2183 is explicit that if a suite already exists in the house it must be decommissioned (kitchen or bathroom plumbing removed, exterior access closed) before a building permit is issued for a garden or carriage suite, except on lots where the zone lists both forms together.
Step 2: Talk to Engineering about servicing
Servicing is the item municipalities most want to see before an application, because it decides whether the project is feasible at all. Saanich's garden suites page sets out what it expects: a minimum 3/4 inch (19 mm) water service for both dwellings, subject to a plumber's or mechanical engineer's fixture-load assessment; a storm connection to the municipal system with an inspection chamber unless an approved on-site alternative applies; and a sanitary connection to the existing service, with an inspection chamber if none exists. Corner lots may be allowed a second driveway with Engineering approval; other lots may not, and the combined driveway width for both dwellings is capped at 7 m.
Oak Bay's infill guide says an Engineering Permit is required if the existing water, sanitary or storm services are not sized for the proposed development, and recommends a civil engineer design the connections. Expect the same questions in Victoria and Langford. If the suite will have a gas range or fireplace, that line is separate permit work: a plumber's guide to which gas jobs need a Technical Safety BC gas permit explains who can pull it.
Step 3: Count the trees
Trees are the second most common cause of a deficiency letter. Saanich asks for tree information with the building permit application and will tell you if a Tree Permit is needed; it recommends submitting an arborist report prepared by an ISA certified arborist up front, with a tree inventory, replacement tree locations and a tree protection plan covering neighbouring and boulevard trees. Oak Bay's Tree Protection Bylaw protects Garry oak, arbutus, Pacific yew, black hawthorn, shore pine and Pacific dogwood over 4 cm in diameter and any other tree over 30 cm, requires replacement trees, and sets tree canopy targets by zone that building permit applicants must demonstrate. Victoria protects trees under its own bylaw; expect an arborist report to be requested where the suite or its service trench affects a protected tree, and confirm the current requirement with the City.
Step 4: Assemble the building permit package
Saanich publishes the clearest list, and it is a good template for every municipality. Its January 2026 garden suite guide lists:
- Title search current within 30 days, with copies of all encumbrances (restrictive covenants, rights-of-way, easements)
- Site and servicing plan prepared and certified by a BC Land Surveyor
- Floor plans, elevations and cross-sections
- Project data sheet
- BC Housing (formerly Homeowner Protection Office) form
- BC Energy Step Code pre-construction energy compliance report
- Agent's letter if the owners have not signed the application
Saanich's web page adds an Archaeological Information Request confirmation for every applicant and says all registered owners must sign. The guide recommends a team of engineer, surveyor, certified arborist and designer or architect. Oak Bay's guide lists the same professionals and adds that a land surveyor will also verify siting and height during construction as a condition of the building permit.
In the City of Victoria the order is different: the City's garden suites process runs through a Garden Suite Delegated Development Permit reviewed by Development Services staff, who may visit the site, before you apply for building permits. The City's web pages would not load when we checked on October 18, 2026, so confirm the current application form and fee with Development Services (zoning@victoria.ca) before you prepare drawings.
Step 5: Parking, EV outlet, address and amenity space
These small items appear on the site plan review and are easy to miss:
- Saanich: one additional parking space for the garden suite, not in tandem and not inside the house's garage, with one energized outlet capable of Level 2 EV charging (a charger itself is not required). A house with a secondary suite and a garden suite needs three spaces. The suite also needs an illuminated unit number on the building and at the street, a 1 m wide pedestrian pathway from the street, at least one bicycle space and 20 m2 of outdoor amenity space. Once the permit is approved you apply to change the property address; the garden suite becomes Unit C.
- Oak Bay: parking minimums were reduced to support tree retention; the zone summaries show 1 space per unit for infill in R-1 to R-3 and 0.5 per unit in R-4 and R-5, with 2 spaces per unit for one-unit residential. Confirm which rate applies to a house plus one accessory dwelling unit. Oak Bay's secondary suite page requires an outdoor, labelled, powered outlet for electric vehicles, scooters or bikes, and the District sets live landscaping minimums by zone (50% in R-1 down to 20% in R-5).
- Victoria and Langford: parking depends on the lot and the zone; ask at the pre-application stage.
The EV outlet is worth sizing properly. An electrician's guide to EV charger installation cost in Victoria covers the circuit, the panel capacity check and what a Level 2 outlet adds to the electrical scope.
Step 6: Step Code, warranty and the other permits
Step Code. A garden suite is a Part 9 building, so BC Energy Step Code Step 3 applies everywhere, and the Zero Carbon Step Code level follows the municipality: EL-4 (effectively all-electric heat and hot water) in Saanich, Victoria and Oak Bay, and in Langford EL-2 for applications on or after July 1, 2026 and EL-4 from December 1, 2026. Saanich asks for the pre-construction compliance report with the permit. See our Step Code guide for the levels by municipality.
Warranty. Saanich's guide states that home warranty insurance is required to construct a new garden suite in BC and refers owners to BC Housing. That means a Licensed Residential Builder and 2-5-10 coverage unless BC Housing authorizes you as an owner builder for the suite. Owner builder rules are explained in owner builder vs licensed builder in BC; ask BC Housing's licensing department how they apply to your suite before you sign with anyone.
Other permits. Saanich lists a plumbing permit and Technical Safety BC electrical and gas permits alongside the building permit. Oak Bay lists building and plumbing permits as required, with blasting, demolition, tree, driveway access, development and Uplands siting and design approvals as possible extras depending on the site. Budget the plumbing and electrical permits separately from the building permit fee.
Step 7: Fees, DCCs and amenity charges
Building permit fees are set by each municipality's fee schedule (worked examples on a $300,000 suite are in the garden suite cost guide). The development and amenity charges differ more:
| Charge | Saanich | City of Victoria | Langford | Oak Bay |
|---|---|---|---|---|
| Development cost charges | A garden suite is "deemed not to be a separate dwelling unit" for single-family DCCs (Bylaw 9553) | Confirm which DCC category applies | DCC sheet does not address suites; ask the city | Bylaw 4891 (adopted February 10, 2025) defines low density as a house that may contain one accessory dwelling unit, at $26,187 per lot or unit; ask whether a suite added to an existing house triggers it |
| Amenity cost charge | None found | $2,290.80 per garden suite (Bylaw 25-048) | None found | Bylaw 4892: $9,465 low density per lot or dwelling unit; same question as the DCC |
| Exemptions | See bylaw | City permit fees are $0 under the fee holiday to January 29, 2027; ACCs are not permit fees | See bylaw | Units of 29 m2 or less, and work valued at $50,000 or less, are exempt from the DCC |
| CRD regional water DCC | From April 2, 2027 in all 13 CRD municipalities; ask how it treats a garden suite on an existing lot if your permit issues after that date | |||
Full component tables for each municipality are in our development cost charges guide.
Step 8: Review, issuance, inspections and occupancy
Saanich circulates the application to Engineering, Parks, Environment and Planning, then sends a letter summarizing required revisions; the building permit is issued once every requirement, including any tree permit, is met. Its web page gives about six weeks from a complete application. Oak Bay's infill guide allows 1 to 3 months to prepare a complete application, 8 to 10 weeks for building permit review and 6 to 12 months of construction, and notes that full permit fees and securities are paid when the permit is ready. Neither Victoria nor Langford publishes a garden suite target; our permit timelines guide covers what each does publish.
During construction you book inspections at each stage, and the suite cannot be lived in until the final occupancy inspection passes. In Oak Bay the surveyor also confirms siting and height. If you are considering a fourplex or two detached units instead of a single suite, Oak Bay's and Saanich's small-scale multi-unit rules may give you more: see Oak Bay infill housing explained and Saanich SSMUH explained.
Printable checklist
- Zone, lot area, lot width, sewer area and heritage status checked on the municipal map.
- Title search (within 30 days) read for covenants, easements and rights-of-way.
- Servicing meeting with Engineering: water size, storm and sanitary connections, driveway.
- Tree inventory and, if needed, arborist report with protection plan.
- Surveyor's site and servicing plan; floor plans, elevations, sections; project data sheet.
- Step Code pre-construction compliance report from an energy advisor.
- BC Housing warranty enrolment or owner builder authorization sorted.
- Parking space, EV outlet, pathway, lighting, unit number and amenity space on the plan.
- Building, plumbing, Technical Safety BC electrical and gas, and tree permits applied for; Victoria development permit first.
- DCCs, ACCs and permit fees budgeted; address change requested after approval.
ACAP LTD manages garden suite projects in Saanich, Victoria, Langford and Oak Bay as general contractor, from the servicing review and permit package through inspections and occupancy. Tell us about your lot and we will set out what your municipality will ask for.