---
title: Cranbrook secondary suite and carriage house rules
question: "Can I add a secondary suite or a carriage house?"
place: Cranbrook, British Columbia, Canada
place_path: ca/bc/cranbrook
category: Building, renovating and your property
owner: municipal
owner_body: City of Cranbrook
sources_read: 2026-11-05
review: machine_checked
canonical: "https://govhandbook.com/ca/bc/cranbrook/secondary-suite/"
json: "https://govhandbook.com/ca/bc/cranbrook/secondary-suite.json"
---

# Cranbrook secondary suite and carriage house rules

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

**Short answer:** In Cranbrook, a secondary suite is allowed as an accessory use in the RT, R-1, R-3, R-4 and R-7 zones, and a detached accessory dwelling unit (such as a garden suite or carriage house) in the R-1 and R-7 zones. Either one needs a building permit.

**Who handles it:** Municipal (City of Cranbrook, https://www.cranbrook.ca)  
**Cost:** Standard building permit fees apply (see building-permit-fees). After the grace period, a secondary suite permit is $300 and the pre-inspection is $100. City staff can pull your title for $22.  
**How long:** The City does not state a processing time.  
**Where:**
- Phone: Tony Luce, Building Inspector and Planning Supervisor, 250-489-0236
- Email: Tony Luce, tony.luce@cranbrook.ca
- Phone: Building Services, 250-489-0207

## Key facts

- **Secondary suite allowed:** Allowed as an accessory use in the RT, R-1, R-3, R-4 and R-7 zones, in the R-5 zone within a townhouse, and in the single-family districts of the CD-1 (Wildstone) and CD-3 (Shadow Mountain) zones, under s. 4.17 of the Zoning Bylaw. (Sources differ: The City's Secondary Suites page lists RS, RD and R-2 (from Bylaw 4002, 2020), but Bylaw 4161 (June 10, 2024) replaced RS with R-1 and deleted RD and R-2, so the current bylaw is followed. The same page also lists CD-1, CD-3 and CD-8; those zones (and R-6, R-8, C-zones) were not read.)
  - Source: [Zoning Bylaw No. 3977, 2019, Part 7.04 Residential Zone R-1, s. 7.04.2(b)](https://cranbrook.civicweb.net/document/2007)
  - Official wording: ".2 Permitted Accessory Uses (a) Home based business (b) Secondary Suite (c) Accessory Dwelling Unit (d) Other uses, buildings and structures accessory to a permitted use."
  - Source: [Zoning Bylaw No. 3977, 2019, Part 7.03 Residential Transition Zone (RT), s. 7.03.2(b)](https://cranbrook.civicweb.net/document/2006)
  - Official wording: "Secondary Suite in accordance with Section 4.17"
  - Source: [https://cranbrook.civicweb.net/document/2011/, s. 7.08.2(b)](https://cranbrook.civicweb.net/document/2011/)
  - Official wording: "Secondary Suite in accordance with Section 4.17"
  - Source: [https://cranbrook.civicweb.net/document/2012/, s. 7.09.2(b)](https://cranbrook.civicweb.net/document/2012/)
  - Official wording: "Secondary Suite in accordance with Section 4.17"
  - Source: [https://cranbrook.civicweb.net/document/2013/, s. 7.10.2(b)](https://cranbrook.civicweb.net/document/2013/)
  - Official wording: "Secondary Suite within a townhouse, in accordance with Section 4.17"
  - Source: [https://cranbrook.civicweb.net/document/2015/, s. 7.12.2(b)](https://cranbrook.civicweb.net/document/2015/)
  - Official wording: "Secondary Suite in accordance with Section 4.17"
  - Source: [https://cranbrook.civicweb.net/document/61506/, Bylaw 4161](https://cranbrook.civicweb.net/document/61506/)
  - Official wording: "Delete Section 7.06 – RD" … "Delete Section 7.07 – R-2"
  - Source: [Secondary Suites, Local Municipal Bylaws](https://www.cranbrook.ca/our-city/city-departments/oic/secondary-suites)
  - Official wording: "RT, RS, R-1, RD, R-2, R-3, R-4, R-5, R-7, CD-1 Wildstone"
  - Source: [https://cranbrook.civicweb.net/document/2032/, Zoning Bylaw Part 7.28.1 (CD-1) s. 7.28.1 Accessory Uses](https://cranbrook.civicweb.net/document/2032/)
  - Official wording: "Secondary suite (in single family district only)"
  - Check: wording matched the official text retrieved 2026-11-06
- **Coach house or garden suite allowed:** An accessory dwelling unit (detached, such as a garden suite, laneway home or carriage house) is a permitted accessory use in the R-1 and R-7 zones. Must be detached from the principal building and connected to municipal water and sewer.
  - Source: [Zoning Bylaw No. 3977, 2019, Part 7.04 Residential Zone R-1, s. 7.04.2(c)](https://cranbrook.civicweb.net/document/2007)
  - Official wording: "(b) Secondary Suite (c) Accessory Dwelling Unit (d) Other uses, buildings and structures accessory to a permitted use."
  - Source: [https://cranbrook.civicweb.net/document/2015/, s. 7.12.2(c)](https://cranbrook.civicweb.net/document/2015/)
  - Official wording: "(b) Secondary Suite in accordance with Section 4.17 (c) Accessory Dwelling Unit (d) Other uses, buildings and structures accessory to a permitted use."
  - Source: [Zoning Bylaw No. 3977, 2019, Part 4 General Regulations, s. 4.17.2](https://cranbrook.civicweb.net/document/2001)
  - Official wording: "(c) shall be detached from principal building." … "(d) must be connected to municipal water and sewer services"
  - Source: [Zoning Bylaw No. 3977, 2019, Part 3 Interpretation, s. 3.04 definitions](https://cranbrook.civicweb.net/document/2000)
  - Official wording: "include a garden suite, laneway home, or carriage house."
  - Check: wording matched the official text retrieved 2026-11-06
- **Limits:** One secondary suite per primary dwelling unit, with its own entrance. One accessory dwelling unit per parcel, at most 106 m² or 75% of the principal home's floor area (whichever is less), and not strata-titled. Suites must meet the BC Building Code. No owner-occupancy rule found.
  - Source: [Zoning Bylaw No. 3977, 2019, Part 7.04 Residential Zone R-1, s. 7.04.4(d)-(e)](https://cranbrook.civicweb.net/document/2007)
  - Official wording: "No more than one (1) secondary suite shall be permitted per primary" … "No more than one (1) accessory dwelling unit shall be permitted per parcel."
  - Source: [Zoning Bylaw No. 3977, 2019, Part 4 General Regulations, s. 4.17](https://cranbrook.civicweb.net/document/2001)
  - Official wording: "The secondary suite shall have an entrance separate from the entrance" … "shall not exceed a gross floor area of 106 sq. m (1,141 sq. ft) or 75% of the" … "Accessory dwelling units cannot be strata titled" … "shall comply with all relevant requirements of the British Columbia Building Code"
  - Check: wording matched the official text retrieved 2026-11-06
- **Parking:** One on-site parking space for the secondary suite (or accessory dwelling unit), in addition to the two spaces required per primary dwelling unit.
  - Source: [Zoning Bylaw No. 3977, 2019, Part 4 General Regulations, s. 4.17.1(e)](https://cranbrook.civicweb.net/document/2001)
  - Official wording: "A minimum of one (1) on-site parking space shall be provided for a secondary suite."
  - Source: [https://cranbrook.civicweb.net/document/2003/, s. 6.12.4(a),(f)](https://cranbrook.civicweb.net/document/2003/)
  - Official wording: "Two (2) per primary dwelling unit" … "Secondary Suite or accessory One (1) dwelling unit"
  - Source: [Secondary Suites, Building Permit Checklist](https://www.cranbrook.ca/our-city/city-departments/oic/secondary-suites)
  - Official wording: "3 required parking spaces, 2 – primary dwelling, 1 – Secondary Suite"
  - Check: wording matched the official text retrieved 2026-11-06
- **Permits:** A building permit is required for a legal secondary suite, whether renovating, adding on, or legalizing an existing suite. After the grace period the permit fee is $300 and the pre-inspection $100. No development permit is named. (Sources differ: The Building Bylaw defines the Grace Period as May 1, 2025 to April 30, 2027. The City's Secondary Suites page gives April 30, 2027 in one place and April 30, 2025 in another; the bylaw date is used. The grace period is for existing suites, not new ones.)
  - Source: [Zoning Bylaw No. 3977, 2019, Part 4 General Regulations, s. 4.17.1(d)](https://cranbrook.civicweb.net/document/2001)
  - Official wording: "A secondary suite will require a Building Permit to be considered a legal"
  - Source: [Secondary Suites, Permits & Inspections](https://www.cranbrook.ca/our-city/city-departments/oic/secondary-suites)
  - Official wording: "you intend to renovate a space in your home or basement to accommodate a secondary suite." … "you intend to legalize your exiting illegal secondary suite."
  - Source: [Building Permit Fees, Schedule A to Bylaw 3725, Schedule A items 7, 15](https://docs.cranbrook.ca/downloads/eForms/building-permit-fees.pdf)
  - Official wording: "Permit for Secondary Suite" … "(after the Grace Period) $300.00" … "Pre-Inspection Inspection for"
  - Check: wording matched the official text retrieved 2026-11-06
- **Bylaw:** Zoning Bylaw No. 3977, 2019 (s. 4.17, Part 6 s. 6.12.4, Part 7 zones); Building Bylaw No. 3725, 2013
  - Source: [Zoning Bylaw No. 3977, 2019, Part 4 General Regulations, Title](https://cranbrook.civicweb.net/document/2001)
  - Official wording: "Zoning Bylaw No. 3977, 2019"
  - Source: [Building Bylaw No. 3725, 2013 (PDF, consolidated April 7, 2025), s. 1.1](https://cranbrook.civicweb.net/document/94267)
  - Official wording: "This Bylaw may be cited for all purposes as "City of Cranbrook Building Bylaw No. 3725,"
  - Check: wording matched the official text retrieved 2026-11-06

## How it works

Under Cranbrook's [Zoning Bylaw](https://cranbrook.civicweb.net/document/2001) s. 4.17, a secondary suite is allowed as an accessory use in the RT, R-1, R-3, R-4 and R-7 zones, in the R-5 zone within a townhouse, and in the single-family districts of the CD-1 (Wildstone) and CD-3 (Shadow Mountain) zones. A detached accessory dwelling unit (garden suite, laneway home or carriage house) is permitted in the R-1 and R-7 zones.

A legal suite needs a building permit, whether you renovate, add on or legalize an existing suite. The Building Bylaw defines a grace period from May 1, 2025 to April 30, 2027 for existing suites to come into compliance; it is not for new suites.

## Steps

1. Confirm your zone allows a suite, using the list above.
2. Apply for a building permit with a site plan and floor plan showing the BC Building Code items. The City asks for two sets of plans unless you submit digitally.
3. Follow the limits: one secondary suite per primary dwelling unit, with its own entrance, and one on-site parking space for the suite on top of two for the home.
4. For an existing unapproved suite, apply the same way. The Building Inspector may do a courtesy inspection first.
5. Contact Tony Luce at 250-489-0236 with questions.

## Good to know

- An accessory dwelling unit must be detached from the main building and connected to municipal water and sewer. Only one is allowed per parcel, at most 106 m² or 75% of the main home's floor area (whichever is less), and it cannot be strata-titled. In R-1 it may be up to 7.2 m high.
- The bylaws do not require the owner to live on the property.
- The City's Secondary Suites page lists old zones (RS, RD, R-2) that were removed in 2024. Follow the current zones above and confirm yours with the City.
- The City's page gives two different grace-period end dates (2027 and 2025). The bylaw says April 30, 2027.
- Unapproved suites can cause insurance and mortgage trouble, and the City says they face penalties if discovered.

## Official forms and pages

- [Secondary Suites, City of Cranbrook](https://www.cranbrook.ca/our-city/city-departments/oic/secondary-suites)
- [Zoning Bylaw 3977, 2019 - Part 4, section 4.17 (PDF)](https://cranbrook.civicweb.net/document/2001)
- [Building Permit Fees, Schedule A (PDF)](https://docs.cranbrook.ca/downloads/eForms/building-permit-fees.pdf)

## Related questions

- [Cranbrook building permits: when you need one and how to apply](https://govhandbook.com/ca/bc/cranbrook/building-permit.md)
- [Cranbrook building permit fees](https://govhandbook.com/ca/bc/cranbrook/building-permit-fees.md)

## The same question elsewhere

- [Secondary suite and carriage house rules in British Columbia, by municipality](https://govhandbook.com/ca/bc/secondary-suite.md)
- [Kimberley](https://govhandbook.com/ca/bc/kimberley/secondary-suite.md)
- [Fernie](https://govhandbook.com/ca/bc/fernie/secondary-suite.md)
- [Canal Flats](https://govhandbook.com/ca/bc/canal-flats/secondary-suite.md)
- [Sparwood](https://govhandbook.com/ca/bc/sparwood/secondary-suite.md)
- [Creston](https://govhandbook.com/ca/bc/creston/secondary-suite.md)
- [Elkford](https://govhandbook.com/ca/bc/elkford/secondary-suite.md)

## Sources

- [Secondary Suites, City of Cranbrook](https://www.cranbrook.ca/our-city/city-departments/oic/secondary-suites) (read 2026-11-05)
- [Zoning Bylaw No. 3977, 2019, Part 4 General Regulations (PDF), City of Cranbrook](https://cranbrook.civicweb.net/document/2001) (read 2026-11-05)
- [Zoning Bylaw No. 3977, 2019, Part 7.04 Residential Zone R-1 (PDF), City of Cranbrook](https://cranbrook.civicweb.net/document/2007) (read 2026-11-05)
- [Building Permit Fees, Schedule A to Bylaw 3725 (PDF), City of Cranbrook](https://docs.cranbrook.ca/downloads/eForms/building-permit-fees.pdf) (read 2026-11-05)
- [Building Bylaw No. 3725, 2013 (PDF, consolidated April 7, 2025), City of Cranbrook](https://cranbrook.civicweb.net/document/94267) (read 2026-11-05)
- [Zoning Bylaw No. 3977, 2019, Part 7.03 Residential Transition Zone (RT)](https://cranbrook.civicweb.net/document/2006) (read 2026-11-05)
- [https://cranbrook.civicweb.net/document/2011/](https://cranbrook.civicweb.net/document/2011/) (read 2026-11-05)
- [https://cranbrook.civicweb.net/document/2012/](https://cranbrook.civicweb.net/document/2012/) (read 2026-11-05)
- [https://cranbrook.civicweb.net/document/2013/](https://cranbrook.civicweb.net/document/2013/) (read 2026-11-05)
- [https://cranbrook.civicweb.net/document/2015/](https://cranbrook.civicweb.net/document/2015/) (read 2026-11-05)
- [https://cranbrook.civicweb.net/document/61506/](https://cranbrook.civicweb.net/document/61506/) (read 2026-11-05)
- [https://cranbrook.civicweb.net/document/2032/](https://cranbrook.civicweb.net/document/2032/) (read 2026-11-05)
- [Zoning Bylaw No. 3977, 2019, Part 3 Interpretation](https://cranbrook.civicweb.net/document/2000) (read 2026-11-05)
- [https://cranbrook.civicweb.net/document/2003/](https://cranbrook.civicweb.net/document/2003/) (read 2026-11-05)

_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 City of Cranbrook. How answers are checked: https://govhandbook.com/methods/ · Canonical page: https://govhandbook.com/ca/bc/cranbrook/secondary-suite/_