---
title: Lake Cowichan secondary suite and carriage house rules
question: "Can I add a secondary suite or a garden suite in Lake Cowichan?"
place: Lake Cowichan, British Columbia, Canada
place_path: ca/bc/lake-cowichan
category: Building, renovating and your property
owner: municipal
owner_body: Town of Lake Cowichan
sources_read: 2026-11-08
review: machine_checked
canonical: "https://govhandbook.com/ca/bc/lake-cowichan/secondary-suite/"
json: "https://govhandbook.com/ca/bc/lake-cowichan/secondary-suite.json"
---

# Lake Cowichan secondary suite and carriage house rules

**Question:** Can I add a secondary suite or a garden suite in Lake Cowichan?

**Short answer:** Yes, in Lake Cowichan a secondary suite is allowed in a single detached house in zones R-1 to R-6, and a garden suite or coach house in R-1 to R-3. Only one accessory dwelling per lot. A building permit is needed.

**Who handles it:** Municipal (Town of Lake Cowichan, https://www.lakecowichan.ca)  
**Cost:** A building permit is needed. The fee schedule values a suite in a principal residence at $100 per ft²; see the building-permit-fees answer.  
**How long:** The Town's pages and bylaw state no processing time.  
**Where:**
- Phone: Building Inspector, 250-749-6681 ext. 104 (Tuesdays and Wednesdays, except holidays)
- Email: Building Inspector, inspections@lakecowichan.ca
- In person: Town Hall, 39 South Shore Road, Lake Cowichan, BC V0R 2G0 (Monday to Friday, 8:30 a.m. to 4:30 p.m., closed statutory holidays)

## Key facts

- **Secondary suite allowed:** In a single detached dwelling: zones R-1 to R-6 (R-6 only in a basement or walk-out garden level). In a duplex: R-2 only on a lot of at least 780 m²; R-3 to R-5 only on a corner lot, a lot with a tandem-parking garage, or a lot of at least 780 m². R-7: within an existing non-conforming single detached dwelling, or on a duplex lot meeting the same corner, tandem or 780 m² test.
  - Source: [Zoning Bylaw No. 1055-2021, consolidated February 24, 2026, Part V, s. 5.1.3 (accessory uses, R-2 to R-6) and R-7](https://www.lakecowichan.ca/dl/1055-2021%20Zoning%20Bylaw%20Consolidated%2026-02-24.pdf)
  - Official wording: "A secondary suite is permitted on a lot with a single detached dwelling." … "A secondary suite is permitted on a lot with a duplex, provided it is a lot of a minimum 780 square metres." … "provided it is a corner lot, or has a garage with tandem parking, or lot of a minimum 780 square metres." … "The secondary suite is in a basement or in a walk out garden level." … "Secondary suite within an existing non-conforming single detached dwelling" … "self-contained living quarters, including cooking equipment and a bathroom, located within the structure of a single-unit dwelling, and with its own separate entrance;" … "has a garage with tandem parking or is on a lot of a minimum of 780 square metres."
  - Check: wording matched the official text retrieved 2026-11-08
- **Coach house or garden suite allowed:** Garden suite or coach house: zones R-1, R-2 and R-3, on a lot with a single detached dwelling. Prohibited on lots without municipal sewer and water, and on duplex lots. One accessory dwelling per lot.
  - Source: [Zoning Bylaw No. 1055-2021, consolidated February 24, 2026, Part V, s. 5.1.3 b.](https://www.lakecowichan.ca/dl/1055-2021%20Zoning%20Bylaw%20Consolidated%2026-02-24.pdf)
  - Official wording: "One of three types of accessory dwelling unit is permitted on a lot with a single detached dwelling: a secondary suite, a garden suite, or a coach house." … "a garden suite or coach house is prohibited on lots without municipal sewer and water service." … "a coach house or garden suite is prohibited." … "In all low and medium density residential zone districts one accessory dwelling unit is permitted on a lot." … "ACCESSORY DWELLING – COACH HOUSE means a self-contained dwelling unit, forming the second story of a detached accessory building;"
  - Check: wording matched the official text retrieved 2026-11-08
- **Limits:** One accessory dwelling unit per lot. Secondary suite: at most 40% of the principal dwelling's floor area or 85 m² (whichever is less), at least 30 m², 2 bedrooms maximum, separate entrance. Garden suite and coach house: at most 40% or 60 m² (whichever is less), at least 30 m², 2 bedrooms maximum. No owner-occupancy rule found. Garden suite goes in the rear yard (lakeside or riverside lots may use front or side yard).
  - Source: [Zoning Bylaw No. 1055-2021, consolidated February 24, 2026, Part V, ss. 5.1.8 to 5.1.10](https://www.lakecowichan.ca/dl/1055-2021%20Zoning%20Bylaw%20Consolidated%2026-02-24.pdf)
  - Official wording: "Maximum size is 40% of gross floor area of principal dwelling, or 85 square metres, whichever is less." … "Maximum size is 40% of gross floor area of principal dwelling, or 60 square metres, whichever is less." … "Minimum size is 30 square metres." … "Maximum number of bedrooms is 2 (two)." … "A Garden suite shall be located in the rear yard of the principal dwelling, except in" … "Entrance shall be a separate independent entrance form the principal dwelling" … "In all low and medium density residential zone districts one accessory dwelling unit is permitted on a lot."
  - Check: wording matched the official text retrieved 2026-11-08
- **Parking:** 1 space per secondary suite, in addition to the 2 per single dwelling. On a duplex lot that is not a corner lot or is not larger than 780 m², tandem parking is required when a suite is present. In R-6, one required space must be in a garage.
  - Source: [Zoning Bylaw No. 1055-2021, consolidated February 24, 2026, Schedule B, Off-Street Parking](https://www.lakecowichan.ca/dl/1055-2021%20Zoning%20Bylaw%20Consolidated%2026-02-24.pdf)
  - Official wording: "Dwelling unit, secondary suite 1 per unit," … "tandem parking for a duplex in the event a" … "secondary suite is present for lots that are not on a corner," … "or not greater than 780 square metres." … "Single dwelling unit, including mobile & 2 per unit" … "One of the required off street vehicle spaces is a garage."
  - Check: wording matched the official text retrieved 2026-11-08
- **Permits:** A building permit is needed to build a suite. The fee schedule values a suite in a principal residence at $100 per ft². The zoning bylaw states no development permit requirement for suites.
  - Source: [Building Bylaw No. 1075-2022, s. 9(1); Schedule B](https://www.lakecowichan.ca/dl/1075-2022%20Building%20Regulations.pdf)
  - Official wording: "A person must apply for, and obtain, a building permit before constructing, altering, or" … "Suite in a principal residence 100.00"
  - Check: wording matched the official text retrieved 2026-11-08
- **Bylaw:** Zoning Bylaw No. 1055-2021 (Part V and Schedule B); Building Bylaw No. 1075-2022
  - Source: [Zoning Bylaw No. 1055-2021, consolidated February 24, 2026, Title page](https://www.lakecowichan.ca/dl/1055-2021%20Zoning%20Bylaw%20Consolidated%2026-02-24.pdf)
  - Official wording: "ZONING BYLAW NO. 1055-2021"
  - Source: [Building Bylaw No. 1075-2022, s. 1](https://www.lakecowichan.ca/dl/1075-2022%20Building%20Regulations.pdf)
  - Official wording: "Building Bylaw No. 1075-2022"
  - Check: wording matched the official text retrieved 2026-11-08

## How it works

The [Zoning Bylaw No. 1055-2021](https://www.lakecowichan.ca/dl/1055-2021%20Zoning%20Bylaw%20Consolidated%2026-02-24.pdf) allows one accessory dwelling unit per lot in zones R-1 to R-6.

- **Single detached dwelling:** a secondary suite in R-1 to R-6 (in R-6 only in a basement or walk-out garden level). In R-7, only within an existing non-conforming single detached dwelling.
- **Duplex:** R-2 only on a lot of at least 780 m². In R-3 to R-5, only on a corner lot, a lot with a tandem-parking garage, or a lot of at least 780 m². R-7 follows the same corner, tandem or 780 m² test.
- **Garden suite or coach house:** R-1, R-2 and R-3, on a lot with a single detached dwelling. Not allowed on lots without municipal sewer and water, or on duplex lots. R-4 to R-6 allow only a secondary suite.

## Steps

1. Check your zone and lot size in the Zoning Bylaw, or ask the Town.
2. Apply for a building permit under the [Building Bylaw](https://www.lakecowichan.ca/dl/1075-2022%20Building%20Regulations.pdf).
3. If your lot is near a watercourse or in another Official Community Plan development permit area, ask the Town whether you also need a development permit.

## Good to know

- Secondary suite: at most 40% of the principal dwelling's floor area or 85 m², whichever is less; at least 30 m²; no more than 2 bedrooms; separate entrance.
- Garden suite or coach house: at most 40% or 60 m², whichever is less; at least 30 m²; no more than 2 bedrooms. A garden suite is a single-storey building in the rear yard (lakeside or riverside lots may use the front or side yard).
- Parking: 1 space per secondary suite in addition to the 2 for the house. On a duplex lot that is not a corner lot or is not larger than 780 m², tandem parking is required. In R-6, one required space must be in a garage. Schedule B lists no parking line for garden suites or coach houses.
- R-6 limits lot coverage to 50% with a suite.
- The bylaw has no owner-occupancy rule that we found.

## Official forms and pages

- [Zoning Bylaw No. 1055-2021, consolidated February 24, 2026 (PDF)](https://www.lakecowichan.ca/dl/1055-2021%20Zoning%20Bylaw%20Consolidated%2026-02-24.pdf)
- [Building Bylaw No. 1075-2022 (PDF)](https://www.lakecowichan.ca/dl/1075-2022%20Building%20Regulations.pdf)

## Related questions

- [Lake Cowichan building permits: when you need one and how to apply](https://govhandbook.com/ca/bc/lake-cowichan/building-permit.md)
- [Lake Cowichan building permit fees](https://govhandbook.com/ca/bc/lake-cowichan/building-permit-fees.md)
- [Lake Cowichan zoning: find your zone and what it allows](https://govhandbook.com/ca/bc/lake-cowichan/zoning-lookup.md)
- [Lake Cowichan home-based business rules](https://govhandbook.com/ca/bc/lake-cowichan/home-based-business.md)

## The same question elsewhere

- [Secondary suite and carriage house rules in British Columbia, by municipality](https://govhandbook.com/ca/bc/secondary-suite.md)
- [Ladysmith](https://govhandbook.com/ca/bc/ladysmith/secondary-suite.md)
- [Duncan](https://govhandbook.com/ca/bc/duncan/secondary-suite.md)
- [North Cowichan](https://govhandbook.com/ca/bc/north-cowichan/secondary-suite.md)
- [Nanaimo](https://govhandbook.com/ca/bc/nanaimo/secondary-suite.md)
- [Lantzville](https://govhandbook.com/ca/bc/lantzville/secondary-suite.md)
- [North Saanich](https://govhandbook.com/ca/bc/north-saanich/secondary-suite.md)

## Sources

- [Zoning Bylaw No. 1055-2021, consolidated February 24, 2026 (PDF)](https://www.lakecowichan.ca/dl/1055-2021%20Zoning%20Bylaw%20Consolidated%2026-02-24.pdf) (read 2026-11-08)
- [Building Bylaw No. 1075-2022 (PDF)](https://www.lakecowichan.ca/dl/1075-2022%20Building%20Regulations.pdf) (read 2026-11-08)

_Checked by script, not yet by a person: the official wording behind 6 of 6 facts was matched to the official text. Gov Handbook is an independent guide, not affiliated with Town of Lake Cowichan. How answers are checked: https://govhandbook.com/methods/ · Canonical page: https://govhandbook.com/ca/bc/lake-cowichan/secondary-suite/_