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Accessory Residential Dwellings, Garages, Sheds and Boathouse

A step-by-step guide for making a building permit application

Accessory buildings or structures include garden sheds, utility sheds, detached garages or storage buildings, gazebos, greenhouses, pool houses/cabanas, large A/C units, exterior furnaces, etc.

Building permits help protect you, your home, and the interests of your community by making sure the project is structurally sound and follows the Ontario Building Code, municipal zoning and other applicable laws.

Do I need a building permit?

A permit is required for an accessory building or structure that is detached and exceeds 10 sq m. (108 sq ft.) in size or contains plumbing fixtures. 

A shed is exempt from obtaining a building permit provided that the shed:

  1. is not more than 15 m2 in gross area,
  2. is not more than one storey in building height,
  3. is not attached to a building or any other structure,
  4. is used only for storage purposes ancillary to a principal building on the lot and
  5. does not have plumbing.

However, the Norfolk County Zoning By-Law still applies. Accessory buildings must be constructed according to the minimum requirements of the Ontario Building Code.

Buildings under 55 sq. m. (592 sq. ft.) in area may be constructed without full-depth foundations, provided they are sufficiently anchored. These buildings are usually built on floating slabs or pier-type foundations. 

Boathouses are considered accessory buildings but have their own regulations under the Norfolk County Zoning By-Law.

Building Permit process

Approvals from other agencies are often required before a building permit can be processed and issued. The building department does not administer these approvals. The fastest way to obtain a building permit is to ensure that all other required approvals are completed before the permit application.

An Applicable Law Checklist is required as part of a complete application. Agency contacts are included with this form. Our community mapping has many of these layers mapped to help you determine if additional approvals are required for your application.

Zoning Requirements

Finding the zoning associated with your property is easy with our GIS Community Web Map; position your property and turn on the zoning layer by clicking layer list, planning, and zoning.

Screenshot of GIS mapping tool

You will need to provide a plot plan for zoning review. Refer to Norfolk County Zoning Bylaw. This plot plan needs to include the following:

  • Property lines and lot dimensions,
  • Location of building and all other structures on the lot,
  • Location of all steps and landing,
  • Distance from dwelling to property lines
  • Parking spots with dimensions,
  • Location of septic systems

A planning application will be required if your proposed building or structure does not comply with the zoning requirements. Zoning and Planning approval is required as part of a complete permit 
application. 

Zoning and set-back provisions

 

Agr. Zone

RH Zones  RR Zones  R1-R6 Zones  Boathouses 
Maximum building 
area 

May not occupy 
more than 10% 
of all acc. 
buildings on lot 
up to max. of 
200sq m

May not occupy 
more than 10% 
of all acc. 
buildings on lot 
up to max. of 
100sq m
May not occupy 
more than 10% 
of all acc. 
buildings on lot 
up to max. of 
55sq m 
May not occupy 
more than 10% 
of all acc. 
buildings on lot 
up to max. of 
55sq m
May not occupy 
more than 10% 
of all acc. 
buildings of lot 
up to max. of 
56sq m 

Setback from 
street/front 
property line (exterior side yard)

13 m (43 ft)  6 m (20 ft )  6 m (20ft)  6 m (20 ft )  Front yard as 
per that zone. Exterior side 
yard 6 m

Setback from rear 
lot line 

1.2 m (4 ft)  1.2 m ( 4 ft)  1.2 m (4 ft)  1.2 m ( 4 ft) 

n/a 

Setback from side 
lot line (interior side yard)

1.2 m (4 ft)  1.2 m (4 ft)  1.2 m (4 ft)  1.2 m (4 ft)  1.2m except if 
on a common 
lot line no 
setback 

Height (grade at front of 
building to peak of 
roof)

6 m (20 ft) 

6 m (20 ft)  5 m (16 ft)  5 m (16 ft)  5 m (16ft) 

Lot Grading

Under the Norfolk County Grading and Drainage By-law, proposed grading plans and a lot grading form shall be submitted with all building permit applications. 

Proposed grading plans need to identify the following:

  • all surface features; 
  • existing and proposed structures; 
  • changes in grade and slopes in percent between such changes, and
  • include sufficient information regarding adjacent properties to confirm conformance with this By-Law with respect to drainage onto those properties.

An exemption may be considered for a lot in a rural area. You must complete the application form, and fees apply.

Site plan drawing example

A building permit application consists of several documents. The forms must be completed, signed, and dated. 

As the property owner, you can complete the design yourself or have a qualified individual with a BCIN number in the House, an Architect, or a Professional Engineer complete the drawings. 

Drawings are to be legible and to scale. Use a ruler or computer-aided drafting (CAD) software to complete your drawings. Provide enough information and detail to ensure compliance with the Ontario Building Code. Accessory building construction is located in Division B, Part 9 of the code. 

Building Department staff, by law, are not permitted to provide design advice. It is the responsibility of the property owner or authorized agent to complete a design that meets the requirements of the Ontario Building Code and the Building Code Act (BCA) 

If you cannot complete the application, you should retain a qualified designer to assist you in completing the application. 

Application Checklist

Completed Forms 

  • Building Permit Application Form 
  • Schedule 1: Designer Information. A Schedule 1 is not required if the building serves a house and is under 55m2 in building area.
  • Applicant Authorization Form, if the application is not completed by the property owner, 
  • Applicable Law Checklist and supporting documents. 
  • Lot grading form or exemption request. 

Required Documents 

  • Plot Plan:
    • Property lines and lot dimensions,
    • Location/Dimensions of accessory building and all other structures on the lot, 
    • Distance from accessory building to property lines, 
    • Location of septic systems, tank and tile bed area. 
    • Lot grading plan. 
  •  Drawing of the accessory building including: 
    • Footing, foundations, anchorage, 
    • Floor plan showing location and size of window and doors, lintel and beam sizes, 
      stairs, landings, guards, handrails.
    • Roof framing layout or truss layout, including truss or rafter spacing, 
    • Elevation showing, location of windows and doors, the height of the building, 
    • Building cross section showing wall and roof construction, depth of foundations, 
      grade, the height of the wall, and overall height of the building. 

Fees

  • Building Permit fee
  • Plumbing permit fee (if applicable)
  • Lot grading exemption (if applicable)

Online

In Person

Visit our service counter located at 12 Gilbertson Dr., Simcoe, Ontario.

Please call or email ahead and make an appointment. Our Permit Coordinators will review your application and provide in writing any missing items and a cost breakdown for the permit fees and payment options.

A Building Inspector will contact you in writing if there are building code concerns or missing information from your application.

A building permit is issued once all documentation has been received, fees are paid in full, and your plans are check for compliance zoning by-law and the building code.

Once you have obtained a building permit, a building inspector needs to attend your site at several milestones in the construction process. Read more about inspections.

Once all inspections are complete and passed your permit is closed. 

Need help?

If you have any questions on the building permit process or plans required, please contact permits@norfolkcounty.ca or call 519-426-5870 or 226-NORFOLK, extension 6016. 

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