---
title: 100 Mile House secondary suite and carriage house rules
question: "Can I add a secondary suite or a carriage house?"
place: 100 Mile House, British Columbia, Canada
place_path: ca/bc/100-mile-house
category: Building, renovating and your property
owner: municipal
owner_body: District of 100 Mile House
sources_read: 2026-11-08
review: machine_checked
canonical: "https://govhandbook.com/ca/bc/100-mile-house/secondary-suite/"
json: "https://govhandbook.com/ca/bc/100-mile-house/secondary-suite.json"
---

# 100 Mile House secondary suite and carriage house rules

**Question:** Can I add a secondary suite or a carriage house?

**Short answer:** In 100 Mile House a secondary suite is allowed only inside a single detached dwelling, in zones that list it, and needs a building permit. A coach house is listed only in the ER-2 zone. Both need municipal sewer.

**Who handles it:** Municipal (District of 100 Mile House, https://www.100milehouse.com)  
**Cost:** Building permit fees apply (see building-permit-fees). No separate suite fee is on the sheet.  
**How long:** The District's pages do not state a processing time for building permits.  
**Where:**
- In person: Municipal Hall, #1-385 Birch Ave., 100 Mile House, BC V0K 2E0 (Monday to Friday, 8:30 a.m. to 4:30 p.m.)
- Phone: District office, 250-395-2434

## Key facts

- **Secondary suite allowed:** Allowed only as an accessory use inside a single detached dwelling, and only in zones that list it: A-1, A-2, A-3, ER-1, ER-2, R-1, R-1/SR, R-2 and R-3. It is not listed in the multi-unit residential, commercial or industrial zones.
  - Source: [Zoning Bylaw No. 1466, 2026, s. 5.20.1; s. 8.1.3(h), 8.2.3(d), 9.1.3(e), 9.3.3(e), 9.5.3(d), 9.6.3(d)](https://www.100milehouse.com/sites/default/files/2026-11/Zoning%20Bylaw%20No.%201466%2C%202026%20-%20CONSOLIDATED.pdf)
  - Official wording: "A secondary suite, where permitted within this Bylaw, is permitted only as an" … "h) secondary suite, contained within a residence." … "e) secondary suite." … "d) secondary suite."
  - Check: wording matched the official text retrieved 2026-11-08
- **Coach house or garden suite allowed:** A coach house is listed as an accessory use only in the ER-2 (Horse Lake Road Residential) zone. It must be in the rear or side yard, up to 50% of the main building's floor area or 90 m² (whichever is less), on municipal sanitary sewer, and not on a parcel with a secondary suite.
  - Source: [Zoning Bylaw No. 1466, 2026, s. 5.21 and s. 9.2.3(d)](https://www.100milehouse.com/sites/default/files/2026-11/Zoning%20Bylaw%20No.%201466%2C%202026%20-%20CONSOLIDATED.pdf)
  - Official wording: "d) coach house;" … "A coach house may only be permitted in the rear yard or side yard, subject to" … "A coach house will not be permitted if a secondary suite has been" … "No coach house shall be permitted without a municipal sanitary sewer" … "maximum floor area does not exceed 50% of the floor area of the principal" … "permitted use or 90 square metres, whichever is less."
  - Check: wording matched the official text retrieved 2026-11-08
- **Limits:** One suite per single detached dwelling; at most the lesser of 90 m² or 40% of the dwelling's total floor area; needs a municipal sanitary sewer connection; no strata titling; not allowed with a bed and breakfast or a coach house on the parcel.
  - Source: [Zoning Bylaw No. 1466, 2026, s. 5.20.2 to 5.20.9](https://www.100milehouse.com/sites/default/files/2026-11/Zoning%20Bylaw%20No.%201466%2C%202026%20-%20CONSOLIDATED.pdf)
  - Official wording: "No more than one secondary suite will be permitted in a single detached" … "The maximum floor area of a secondary suite must not exceed the lesser of" … "90 square metres or 40% of the total floor area of the single detached" … "No secondary suite shall be permitted without a municipal sanitary sewer" … "Strata titling of a secondary suite will not be permitted." … "A secondary suite will not be permitted in conjunction with a bed and"
  - Check: wording matched the official text retrieved 2026-11-08
- **Parking:** One onsite parking space, in addition to the parking required for the main dwelling.
  - Source: [Zoning Bylaw No. 1466, 2026, s. 5.20.5 and Table 1](https://www.100milehouse.com/sites/default/files/2026-11/Zoning%20Bylaw%20No.%201466%2C%202026%20-%20CONSOLIDATED.pdf)
  - Official wording: "A secondary suite must provide one onsite parking space." … "Secondary Suite 1 space not including off-street parking required for"
  - Check: wording matched the official text retrieved 2026-11-08
- **Permits:** A building permit, which the District requires for any construction, addition, alteration or change of use; the suite must meet all District bylaws and the B.C. Building Code. A development permit is needed only if the property is in a development permit area.
  - Source: [Zoning Bylaw No. 1466, 2026, s. 5.20.8](https://www.100milehouse.com/sites/default/files/2026-11/Zoning%20Bylaw%20No.%201466%2C%202026%20-%20CONSOLIDATED.pdf)
  - Official wording: "A secondary suite must comply with all relevant District Bylaws, and the B.C."
  - Source: [Building Permits, Building Permits page](https://www.100milehouse.com/business-development/building-permits)
  - Official wording: "A building permit is required for any construction, addition, alteration, change of use"
  - Source: [Development Permits, Development Permits page](https://www.100milehouse.com/business-development/development-permits-variances/development-permits)
  - Official wording: "Prior to obtaining a Building Permit, a Development Permit may be required."
  - Check: wording matched the official text retrieved 2026-11-08
- **Bylaw:** Zoning Bylaw No. 1466, 2026 (s. 5.20, 5.21); Building Bylaw No. 695, 1996
  - Source: [Zoning Bylaw No. 1466, 2026, cover](https://www.100milehouse.com/sites/default/files/2026-11/Zoning%20Bylaw%20No.%201466%2C%202026%20-%20CONSOLIDATED.pdf)
  - Official wording: "Zoning Bylaw No. 1466, 2026"
  - Source: [Building Bylaw No. 695, 1996 consolidation, cover](https://www.100milehouse.com/sites/default/files/2023-05/bylaw%20695%20consolidated%20Building%20Bylaw_updated%20May%2016%202023.pdf)
  - Official wording: "BUILDING BYLAW NO. 695, 1996"
  - Check: wording matched the official text retrieved 2026-11-08

## How it works

The [Zoning Bylaw No. 1466](https://www.100milehouse.com/sites/default/files/2026-11/Zoning%20Bylaw%20No.%201466%2C%202026%20-%20CONSOLIDATED.pdf) allows a secondary suite only as an accessory use inside a single detached dwelling, and only in zones that list it: A-1, A-2, A-3, ER-1, ER-2, R-1, R-1/SR, R-2 and R-3. It is not listed in the multi-unit residential, commercial or industrial zones.

A coach house is listed as an accessory use only in the ER-2 (Horse Lake Road Residential) zone.

## Steps

1. Confirm your zone allows a suite (see zoning-lookup).
2. Check the limits below.
3. Apply for a building permit; the suite must meet all District bylaws and the B.C. Building Code.
4. If your property is in a development permit area, a development permit is also needed.

## Good to know

- One suite per single detached dwelling, at most the lesser of 90 m² or 40% of the dwelling's total floor area.
- Needs a municipal sanitary sewer connection. No strata titling. Not allowed with a bed and breakfast or a coach house on the parcel.
- Parking: one onsite space, in addition to the parking for the main dwelling.
- A coach house goes in the rear or side yard, up to 50% of the main building's floor area or 90 m² (whichever is less), on municipal sanitary sewer, and not on a parcel with a secondary suite.
- The bylaw states no owner-occupancy requirement.

## Official forms and pages

- [Zoning Bylaw No. 1466 (PDF)](https://www.100milehouse.com/sites/default/files/2026-11/Zoning%20Bylaw%20No.%201466%2C%202026%20-%20CONSOLIDATED.pdf)
- [Building Permits, District of 100 Mile House](https://www.100milehouse.com/business-development/building-permits)

## Related questions

- [100 Mile House building permits: when you need one and how to apply](https://govhandbook.com/ca/bc/100-mile-house/building-permit.md)
- [100 Mile House zoning: find your zone and what it allows](https://govhandbook.com/ca/bc/100-mile-house/zoning-lookup.md)

## The same question elsewhere

- [Secondary suite and carriage house rules in British Columbia, by municipality](https://govhandbook.com/ca/bc/secondary-suite.md)
- [Clinton](https://govhandbook.com/ca/bc/clinton/secondary-suite.md)
- [Williams Lake](https://govhandbook.com/ca/bc/williams-lake/secondary-suite.md)
- [Cache Creek](https://govhandbook.com/ca/bc/cache-creek/secondary-suite.md)
- [Barriere](https://govhandbook.com/ca/bc/barriere/secondary-suite.md)
- [Clearwater](https://govhandbook.com/ca/bc/clearwater/secondary-suite.md)
- [Ashcroft](https://govhandbook.com/ca/bc/ashcroft/secondary-suite.md)

## Sources

- [Zoning Bylaw No. 1466, 2026 (PDF), District of 100 Mile House](https://www.100milehouse.com/sites/default/files/2026-11/Zoning%20Bylaw%20No.%201466%2C%202026%20-%20CONSOLIDATED.pdf) (read 2026-11-08)
- [Building Bylaw No. 695, 1996 consolidation (PDF), District of 100 Mile House](https://www.100milehouse.com/sites/default/files/2023-05/bylaw%20695%20consolidated%20Building%20Bylaw_updated%20May%2016%202023.pdf) (read 2026-11-08)
- [Building Permits, District of 100 Mile House](https://www.100milehouse.com/business-development/building-permits) (read 2026-11-08)
- [Development Permits, District of 100 Mile House](https://www.100milehouse.com/business-development/development-permits-variances/development-permits) (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 District of 100 Mile House. How answers are checked: https://govhandbook.com/methods/ · Canonical page: https://govhandbook.com/ca/bc/100-mile-house/secondary-suite/_