Shed & Accessory Building Permits Ottawa: 2026 Guide
🏗️ Quick Answer
In Ottawa, you do not need a shed permit Ottawa if the structure is a one-storey storage shed of 15 m² (161 sq. ft.) or less, has no plumbing, and is not attached to another building. Any accessory building — including detached garages, gazebos, pool houses, and workshops — over 10 m² (108 sq. ft.) requires a building permit. Even permit-exempt sheds must comply with Ottawa’s zoning setback, height, and lot coverage rules.
Whether you are planning a backyard storage shed, a detached garage, a gazebo, or a pool house, understanding shed permit Ottawa rules and zoning requirements before you build is essential. The need for a permit depends on the size of the structure, its intended use, and whether it includes plumbing or electrical systems.
At Architectural Drawing, we prepare permit-ready drawings for accessory buildings across Ottawa — from simple garage plans to complex workshops with plumbing and electrical. This guide covers every rule you need to know in 2026.
Do You Need a Permit for a Shed in Ottawa?
The answer depends on the size, type, and features of the structure. Here is the definitive breakdown from the City of Ottawa:
⚠️ Important: The permit exemption for sheds under 15 m² applies only to one-storey storage sheds that are ancillary to a principal dwelling and have no plumbing. Pre-fabricated buildings, including kit garages and carports, follow the standard 10 m² threshold. Even exempt structures must comply with all zoning setback, height, and lot coverage rules. Properties within Heritage Districts or with designated heritage buildings are not eligible for any exemptions and must contact a Building Client Service Centre.
Zoning Rules for Accessory Buildings in Ottawa
Even if your shed does not require a building permit, it must still comply with Ottawa’s zoning bylaws. Knowing the shed permit Ottawa exemptions does not exempt you from zoning compliance. These rules govern where you can place the structure, how tall it can be, and how much of your lot it can cover. Violating zoning rules can result in orders to remove the structure entirely.
💡 Verify Before You Build: Setbacks and height limits vary by zone. Contact a Development Information Officer at 613-580-2424 ext. 23434 or email dioinquiry@ottawa.ca with your property address to confirm the specific zoning rules for your lot. You can also check your property’s zoning on geoOttawa.
Common Accessory Building Types and Their Requirements
Detached Garages
A detached garage requires a building permit in almost all cases, as most garages exceed the 10 m² threshold. Your permit application must include a site plan showing the building’s location relative to property lines, floor plans, elevations, foundation details, and construction specifications. Garage drawings need to demonstrate compliance with the Ontario Building Code for framing, foundation, and roofing requirements.
Gazebos & Pergolas
Under Ottawa’s Building Code Services advisory, gazebos, pergolas, and similar open structures may qualify for the same 15 m² permit exemption as storage sheds — provided they are one storey, not attached to another building, and have no plumbing. However, Building Code Services reserves the right to assess any structure individually to determine if the exemption applies. Larger gazebos or those with enclosed walls require a permit.
Pool Houses & Change Rooms
Pool houses and change rooms typically include plumbing, which means a shed permit Ottawa or building permit is always required regardless of size. If the structure exceeds 10 m², a standard building permit is needed. You will also need a separate pool enclosure permit ($257 in 2026) for the fencing around the pool itself.
Workshops & Studios
Workshops and studios without plumbing may qualify for the 15 m² permit exemption. If you are adding electrical service, the building permit exemption still applies, but you will need an ESA electrical permit from the Electrical Safety Authority for any new wiring or panel connections. Structures with plumbing (a sink, for example) require a building permit regardless of size.
Need Drawings for a Garage, Shed, or Accessory Building?
We prepare complete permit drawing packages for every type of accessory building — designed to pass City review the first time.
(613) 518-1387
How to Apply for an Accessory Building Permit in Ottawa
If your accessory building requires a shed permit Ottawa or garage building permit, here is the step-by-step process:
Check zoning — contact a Development Information Officer (613-580-2424 ext. 23434) to confirm setbacks, height limits, and lot coverage rules for your specific property.
Prepare drawings — your package must include a site plan, floor plan, elevations, cross sections, and foundation details. All drawings must be to scale, dimensioned, signed, and dated. Review the accessory building drawing checklist for the full list. For general building permit information, see our resource page.
Submit your application — applications can be submitted online through My Service Ottawa along with your drawing package and permit fees. The minimum fee is $117.
Wait for approval — accessory buildings are classified as “small homeowner projects” with a review target of 5 business days. Most permits are issued within 1–2 weeks with complete applications.
Schedule inspections — once approved, inspections are required at key stages: footing, foundation (before backfill), framing, insulation/vapour barrier, plumbing (if applicable), and final. Book inspections 48 hours in advance via your online portal or through 3-1-1.
Required Drawings for Accessory Building Permits
The City of Ottawa requires the following drawings to be submitted with your accessory building permit application. Homeowners are legally allowed to prepare their own drawings under the Ontario Building Code’s homeowner exemption, but professional drawings from a BCIN-qualified designer reduce rejection risk and speed up approval.
At Architectural Drawing, we prepare complete accessory building packages for Ottawa homeowners. Whether you need garage drawings, shed plans, or workshop designs, we ensure every drawing meets City requirements. Learn more about our process or view our pricing guide.
Accessory Building Permit Fees & Costs
Accessory building permits are among the most affordable in Ottawa. For a full breakdown of all City of Ottawa fees, see our 2026 permit fee guide. The fee structure depends on whether the building creates new gross floor area (GFA method) or involves alterations to an existing structure (construction value method):
Typical Shed/Garage Permit
$117–$530
Based on GFA for new structures
Permit Approval Time
5 business days
City’s first-review target
Homeowner Design Exemption
✅ Yes
Can draw own plans for own property
How Ottawa’s New 2026 Zoning Bylaw Affects Accessory Buildings
Ottawa’s new Zoning By-law 2026-50, approved January 28, 2026, introduces several changes that affect accessory buildings. The bylaw is expected to take full effect by September 2026 — until then, the most restrictive provisions of both the current and new bylaws apply.
Key changes for accessory buildings include expanded permissions for coach houses (detached accessory dwellings) on serviced lots, updated setback provisions under the new N1–N6 neighbourhood zone system, and simplified lot coverage calculations. If you are considering a coach house with living space — which is different from a standard shed or garage — read our complete Ottawa zoning bylaw 2026 guide and our secondary dwelling unit guide for the full requirements.
Frequently Asked Questions
Do I need a permit for a shed under 10×10 in Ottawa?
A 10×10 foot shed is approximately 9.3 square metres (100 sq. ft.), which is under the 15 m² (161 sq. ft.) permit exemption threshold. As long as it is one storey, used for storage, not attached to another building, and has no plumbing, you do not need a building permit. You must still comply with zoning setback and height rules.
What is the maximum shed size without a permit in Ottawa?
The maximum size for a permit-exempt shed in Ottawa is 15 square metres (approximately 161 square feet or about 12×13 feet). The structure must be one storey, used for storage only, not attached to another building, and have no plumbing. Any shed larger than this requires a building permit.
How close to the property line can I build a shed in Ottawa?
In most Ottawa residential zones, sheds and accessory buildings must be at least 0.6 metres (2 feet) from the side and rear property lines. Setbacks may vary by zone, so verify with a Development Information Officer before placing your structure. Accessory buildings are generally not permitted in the front yard.
Do I need a permit for a detached garage in Ottawa?
Yes. Most detached garages in Ottawa exceed 10 square metres (108 sq. ft.) and require a building permit. Even pre-fabricated garage kits require a permit if they exceed this threshold. Your application must include a complete drawing package with site plan, floor plan, elevations, and foundation details.
How much does a shed or garage permit cost in Ottawa?
Most shed and small garage permits cost the minimum fee of $117 in Ottawa. Larger garages are calculated using the gross floor area (GFA) method — a typical 500 sq. ft. detached garage permit costs approximately $530. Permit fees are due at the time of application.
How tall can a shed be in Ottawa?
In most Ottawa residential zones, the maximum height for an accessory building with a flat roof is 3.2 metres (10.5 feet). With a sloped roof, the maximum is typically 4.5 metres (14.8 feet), measured from ground level to the highest point. Heights are measured from the finished grade, and specific limits may vary by zone.
Do pre-fabricated sheds need a permit in Ottawa?
Pre-fabricated sheds follow the same rules as site-built structures. If the pre-fab shed is a one-storey storage unit of 15 m² or less with no plumbing, no permit is needed. Pre-fabricated buildings over 10 m² that are not simple storage sheds (such as pre-fab garages or carports) require a permit. The City explicitly notes that pre-fabricated buildings over 10 m² require a permit.
Can I use a shed as a home office in Ottawa?
A simple shed used as a home office — without plumbing or sleeping quarters — may be classified as accessory storage and fall under the 15 m² permit exemption. However, if you add plumbing, heating, or intend to use it as habitable space, additional building code and zoning requirements apply. Home-based business permissions were also expanded under Ottawa’s new 2026 zoning bylaw.
What inspections are required for an accessory building in Ottawa?
Common inspections include footing (before placing concrete), foundation (before backfill), framing, insulation and vapour barrier, plumbing rough-in (if applicable), and final inspection. The specific inspections required depend on the scope of your building. Your building inspector’s name and phone number will be listed on your permit.
Can I draw my own plans for a shed permit in Ottawa?
Yes. Under the Ontario Building Code, homeowners are permitted to prepare their own drawings for an accessory building (garage or shed) that serves a house they own. You must acknowledge this on the application form under Schedule 1 (Section D, “Declaration of Designer”). However, professional drawings reduce deficiency letters and ensure compliance, which is why many homeowners choose to work with a qualified designer.
Planning a Shed, Garage, or Accessory Building in Ottawa?
From simple shed plans to full garage drawing packages — we prepare everything your permit application needs.
(613) 518-1387