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100 Mile House secondary suite and carriage house rules

Can I add a secondary suite or a carriage house?

100 Mile House, British ColumbiaChecked against official textSources read 2026-11-08

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.

Key facts

Secondary suite allowedAllowed 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.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) · Wording matched the official text retrieved 2026-11-08
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.
Coach house or garden suite allowedA 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.Zoning Bylaw No. 1466, 2026, s. 5.21 and s. 9.2.3(d) · Wording matched the official text retrieved 2026-11-08
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.
LimitsOne 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.Zoning Bylaw No. 1466, 2026, s. 5.20.2 to 5.20.9 · Wording matched the official text retrieved 2026-11-08
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
ParkingOne onsite parking space, in addition to the parking required for the main dwelling.Zoning Bylaw No. 1466, 2026, s. 5.20.5 and Table 1 · Wording matched the official text retrieved 2026-11-08
Official wording
A secondary suite must provide one onsite parking space.
Secondary Suite 1 space not including off-street parking required for
PermitsA 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.Zoning Bylaw No. 1466, 2026, s. 5.20.8; Building Permits, Building Permits page; Development Permits, Development Permits page · Wording matched the official text retrieved 2026-11-08
Official wording
A secondary suite must comply with all relevant District Bylaws, and the B.C.
A building permit is required for any construction, addition, alteration, change of use
Prior to obtaining a Building Permit, a Development Permit may be required.
BylawZoning Bylaw No. 1466, 2026 (s. 5.20, 5.21); Building Bylaw No. 695, 1996Zoning Bylaw No. 1466, 2026, cover; Building Bylaw No. 695, 1996 consolidation, cover · Wording matched the official text retrieved 2026-11-08
Official wording
Zoning Bylaw No. 1466, 2026
BUILDING BYLAW NO. 695, 1996

How it works

The Zoning Bylaw No. 1466 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

The same question in other places

Clinton · Williams Lake · Cache Creek · Barriere · Clearwater · Ashcroft

Secondary suite and carriage house rules in British Columbia, by municipality →

Sources

  1. Zoning Bylaw No. 1466, 2026 (PDF), District of 100 Mile House (read 2026-11-08)
  2. Building Bylaw No. 695, 1996 consolidation (PDF), District of 100 Mile House (read 2026-11-08)
  3. Building Permits, District of 100 Mile House (read 2026-11-08)
  4. Development Permits, District of 100 Mile House (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. How answers are checked.