Ontario Site Plan Services

Need a site plan for a building permit in Ontario? Whether you are planning a garage, addition, deck, shed, pool, carport, fence, retaining wall, laneway suite, or other residential project, your municipality may need a clear drawing that shows how the proposed work fits on your property.

An Ontario site plan helps show property boundaries, existing buildings, proposed work, setbacks, driveway access, parking, grading, drainage, trees, services, easements, and other site details that matter during municipal review.

This guide explains what an Ontario building permit site plan usually includes, how setbacks and surveys affect the drawing, what municipal reviewers may check, and how a clear site plan can help homeowners, designers, and contractors avoid confusing permit submissions.

What Is an Ontario Site Plan for a Building Permit?

An Ontario site plan is a scaled drawing of a property from above. It shows the existing site layout and the proposed project location. For permit purposes, the site plan helps the municipality understand where the work will happen and how it relates to the lot, buildings, property lines, zoning requirements, and surrounding site features.

A building permit site plan may show:

property boundaries and lot dimensions;
existing house and accessory buildings;
proposed construction footprint;
front, side, rear, and exterior side yard setbacks;
driveway, parking, and access routes;
decks, patios, porches, stairs, walkways, and ramps;
garages, sheds, carports, pools, and accessory structures;
lot coverage and hard surface areas;
grading and drainage direction;
downspouts, swales, catch basins, and stormwater features if known;
trees, landscaping, and tree protection areas;
easements, right-of-ways, and encroachments if known;
water, sanitary sewer, storm sewer, gas, hydro, and other services where known;
north arrow, scale, address, and legal description.

The purpose is simple: the site plan should make the project easy to understand. A reviewer should be able to see what exists now, what is proposed, how close it is to the lot lines, and whether the site layout appears complete enough for review.

When Do You Need a Site Plan in Ontario?

In Ontario, a building permit is generally required when you construct, renovate, demolish, or change the use of a building. The exact permit path depends on the municipality, project type, zoning, and property conditions.

Official source: Ontario – Building Permits, Citizen’s Guide to Land Use Planning

A site plan is commonly requested when the project affects the property layout. This may include projects such as:

home additions;
new detached garages;
attached garages or carports;
decks and porches;
sheds and accessory buildings;
pools and hot tubs;
patio covers and covered entries;
retaining walls and grading changes;
laneway suites or garden suites;
driveway widening or parking layout changes;
projects near property lines, easements, or municipal services.

Not every small project needs the same level of detail. A simple shed site plan is different from a new house site plan. A garage site plan is different from a pool or retaining wall plan. The key is to match the drawing to the project and the municipality’s requirements.

Building Permit Review vs Site Plan Control

In everyday homeowner language, “site plan” often means a drawing submitted with a building permit. In Ontario planning language, “site plan control” can mean a separate municipal planning approval process for certain types of development.

Ontario’s site plan control guide explains that within a site plan control area, many development or redevelopment projects require municipal site plan approval. Through that process, applicants may submit drawings showing matters such as building location, landscaping, waste and recycling areas, traffic and pedestrian access, walkways, and exterior design matters where applicable.

Official source: Ontario – Site Plan Control Guide

For many residential permit projects, homeowners are usually dealing with a permit site plan rather than a large formal site plan control application. However, municipal review can still involve zoning, setbacks, grading, drainage, tree protection, access, and survey information.

Why Setbacks Matter on an Ontario Site Plan

Setbacks show the distance between the proposed work and the property lines or nearby buildings. They are one of the most important parts of an Ontario building permit site plan.

A site plan may need to show:

front yard setback;
rear yard setback;
interior side yard setback;
exterior side yard setback on a corner lot;
distance from the proposed work to the existing house;
distance to detached garages, sheds, decks, pools, and other structures;
distance to easements, right-of-ways, or municipal services;
distance to neighbouring structures if relevant.

Setbacks vary by municipality and zoning by-law. The same project may be allowed in one Ontario city but need a different layout in another. That is why a site plan should show actual property lines, project dimensions, and setback dimensions instead of only a general sketch.

Survey vs Site Plan in Ontario

A site plan and a survey are related, but they are not the same thing.

Survey

A survey is prepared by a licensed Ontario Land Surveyor. It can establish property boundaries and show measured property information. The Association of Ontario Land Surveyors says property boundaries may only be established by a licensed Ontario Land Surveyor.

Official source: Association of Ontario Land Surveyors – FAQs

Site Plan

A site plan uses property information to show the proposed project layout. It shows where the work will go and how it relates to lot lines, existing buildings, setbacks, access, drainage, trees, and services.

For permit review, many municipalities request a survey or site plan that is referenced to a current survey. For example, Toronto’s residential permit guides commonly ask for a survey or site plan showing property lines, lot area, right-of-ways or easements, existing and proposed buildings, overall dimensions, and setback dimensions.

Official source: City of Toronto – Small Residential Additions

If your project is close to a property line, fence, easement, or neighbour, a current survey can be very helpful. A fence line, hedge, driveway edge, or old landscaping border should not be treated as the legal boundary unless it has been verified.

What Municipal Reviewers May Check

Every Ontario municipality has its own building permit process, but reviewers commonly look for site information that helps them confirm zoning, building placement, drainage, access, and completeness.

Municipal review may include:

property lines and lot area;
existing and proposed building footprints;
overall project dimensions;
setback dimensions to lot lines and nearby buildings;
zoning information such as lot coverage or building height;
right-of-ways, easements, and encroachments;
driveway, parking, and access layout;
grading and drainage information;
stormwater management or lot grading requirements;
tree protection or landscaping information;
services and utilities where relevant;
whether additional approvals are needed before the building permit can be issued.

Hamilton’s residential building permit page, for example, lists site plan information such as property lines, lot area referenced to a current survey, existing and proposed buildings, overall dimensions, setback dimensions, zoning provisions, parking and loading spaces, and related details where applicable.

Official source: City of Hamilton – Building Permit Application Requirements

What Should an Ontario Permit Site Plan Include?

The exact site plan requirements depend on the municipality and project type. Still, most Ontario residential site plans include a similar set of core details.

1. Property Boundaries

The property boundaries should be shown clearly. These lines help determine setbacks, lot coverage, yard location, access, and whether the project is close to a neighbour or municipal right-of-way.

If boundary accuracy matters, use survey information from a licensed Ontario Land Surveyor.

2. Lot Dimensions and Lot Area

The site plan should show lot width, lot depth, and lot area where required. Irregular lots, corner lots, pie-shaped lots, and properties with curved boundaries should be drawn carefully so the project placement is clear.

3. Existing Buildings and Structures

The existing house should be shown and labelled. Other structures should also be shown if they affect the project, including:

detached garage;
shed;
carport;
deck;
porch;
patio;
pool;
retaining wall;
driveway or parking pad;
fence or gate;
walkway or stairs.

Reviewers need to understand the existing site before they can properly review the proposed work.

4. Proposed Project Footprint

The proposed work should be clearly labelled. For example:

Proposed Garage;
Proposed Addition;
Proposed Deck;
Proposed Shed;
Proposed Pool;
Proposed Carport;
Proposed Garden Suite;
Proposed Retaining Wall.

The plan should show the project’s length, width, location, and relationship to the rest of the lot.

5. Setback Dimensions

Setback dimensions should be easy to find. A reviewer should not need to guess how far the proposed project is from a property line.

Show setbacks from the proposed work to:

front lot line;
rear lot line;
side lot lines;
flanking street lot line on corner lots;
existing house;
other buildings or structures;
easements or right-of-ways if relevant.

6. Driveway, Parking, and Access

Access is important for garages, carports, parking pads, laneway suites, garden suites, driveway widening, and additions that affect existing parking.

The site plan may show:

driveway location;
driveway width;
garage or carport access;
parking space location;
front street or rear lane access;
walkways and pedestrian paths;
gate locations;
access to the proposed structure.

7. Lot Coverage and Hard Surfaces

Many Ontario municipalities review lot coverage or building coverage. Some also review hard surface area or landscaped open space depending on the project and zoning by-law.

A site plan may identify:

existing house footprint;
proposed addition footprint;
garage, shed, or accessory structure area;
covered porch or patio cover area;
driveway and parking areas;
walkways, patios, and pool decks;
landscaped areas;
permeable and impermeable surfaces where required.

8. Grading and Drainage

Grading and drainage details help show how water moves across the lot. This is especially important for additions, new homes, garages, pools, retaining walls, driveway changes, and projects on sloped sites.

The site plan may show:

existing grades where known;
proposed grades where known;
surface drainage arrows;
downspout direction;
swales;
catch basins;
storm sewer connection if known;
retaining wall drainage;
areas where water should not be directed.

Water should not be directed toward the house foundation, neighbouring properties, sidewalks, driveways, or low areas where ponding can occur.

9. Easements and Right-of-Ways

Easements and right-of-ways can limit where buildings, fences, pools, sheds, walls, and services can be placed. If known, they should be shown on the site plan.

Common examples include:

storm sewer easement;
sanitary sewer easement;
utility easement;
drainage easement;
access right-of-way;
shared driveway access;
municipal widening or road allowance condition.

10. Trees and Landscaping

Trees can affect project location, excavation, foundation work, service trenches, and municipal review. Some Ontario municipalities have private tree by-laws or tree protection requirements.

A site plan may show:

existing trees on the property;
street trees;
trees on adjacent properties near the work area;
trees proposed for removal;
tree protection fencing;
landscaped areas;
critical root zones if provided by an arborist.

11. Services and Utilities

Some permit projects need service information. This is common for additions, new homes, garden suites, pools, detached garages with power, plumbing work, or projects that affect drainage.

The site plan may show known:

water service;
sanitary sewer;
storm sewer;
gas service;
hydro or electrical service;
utility poles or overhead wires;
catch basins and manholes;
service trenches or proposed service routes.

Ontario Projects That Commonly Need Site Plans

Garage Site Plans

A garage site plan should show the proposed garage footprint, existing house, driveway access, parking layout, setbacks, lot coverage, drainage, trees, and property boundaries.

Addition Site Plans

An addition site plan should show the existing house, proposed addition, setbacks, lot coverage, grading, drainage, services, easements, and nearby structures.

Deck Site Plans

A deck site plan should show deck size, height if known, stairs, landings, setbacks, property lines, doors, existing house, and nearby patios, trees, or retaining walls.

Shed Site Plans

A shed site plan should show the shed footprint, side and rear setbacks, existing house, property lines, drainage direction, trees, easements, and backyard access.

Pool Site Plans

A pool site plan should show the pool location, barrier or fence layout, gates, equipment location, setbacks, drainage, pool deck, trees, and nearby structures.

Fence Site Plans

A fence site plan should show property lines, fence alignment, fence height, gates, corner-lot conditions, driveway visibility, and nearby sidewalks or streets where relevant.

Carport Site Plans

A carport site plan should show roof area, support posts, parking layout, driveway access, setbacks, drainage, existing house, and property lines.

Retaining Wall Site Plans

A retaining wall site plan should show wall location, wall height, slopes, top and bottom wall elevations, drainage, boundaries, trees, and nearby structures.

Garden Suite or Laneway Suite Site Plans

A garden suite or laneway suite site plan should show the existing house, proposed suite, access, parking, setbacks, services, drainage, trees, grading, and relationship to the rear yard or laneway.

How Surveys Help Municipal Review

A survey can give the site plan a more reliable foundation. It can help confirm property boundaries, lot dimensions, existing buildings, easements, and other measured property information.

A survey is especially helpful when:

the project is close to a property line;
the lot is irregular or older;
there is a boundary dispute;
the fence line may not match the legal boundary;
the municipality asks for a current survey;
the project affects an easement or right-of-way;
grading information is required;
a new home, addition, or detached structure is being reviewed.

SitePlans.ca can work from available property information, surveys, sketches, municipal comments, and project details. If a legal boundary must be established, that work should be handled by a licensed Ontario Land Surveyor.

Why Municipal Review Can Vary Across Ontario

Ontario municipalities use the Ontario Building Code framework, but local review still varies because zoning by-laws, tree by-laws, grading standards, driveway rules, lot coverage limits, and application checklists are municipal.

That means a site plan for Toronto, Ottawa, Mississauga, Brampton, Hamilton, London, Kitchener, Windsor, Barrie, Markham, Vaughan, or Kingston may not look exactly the same.

For example, Mississauga’s site plan approval page says a site plan includes building footprints and dimensions, existing and proposed building setbacks from all lot lines, and other information needed for review.

Official source: City of Mississauga – Apply for Site Plan Approval

The important point is that the site plan should be prepared for the specific property and municipality, not copied from another city’s requirements.

Common Site Plan Mistakes That Delay Ontario Building Permits

Many permit delays come from missing or unclear information. Avoid these common mistakes:

not showing the full property boundary;
using a fence as the property line without checking;
not showing lot dimensions or lot area;
not labelling the existing house;
not clearly identifying the proposed project;
forgetting the project dimensions;
not showing setback dimensions;
not showing existing accessory structures;
missing driveway, parking, or access information;
not showing easements or right-of-ways;
not showing drainage direction;
forgetting trees or tree protection areas;
not showing grading information when required;
using an unscaled sketch for a project that needs a scaled plan.

What to Gather Before Ordering an Ontario Site Plan

Before preparing a site plan, gather as much property and project information as possible.

Helpful items include:

property address;
legal description if available;
survey plan if available;
municipal roll number if available;
photos of the property;
sketch of the proposed project;
project dimensions;
distance from proposed work to property lines if known;
location of existing house, garage, shed, deck, patio, driveway, pool, and fences;
tree locations if relevant;
known easements or right-of-ways;
municipal comments or correction notes if already received;
designer, contractor, or engineer drawings if available.

The more accurate the starting information, the more useful the finished site plan can be.

How SitePlans.ca Helps Ontario Homeowners

SitePlans.ca prepares clear, easy-to-read site plans for residential permit projects across Ontario and Canada. Our goal is to help homeowners, designers, contractors, and permit applicants organize the site information into a clean drawing that supports municipal review.

Depending on your project, your Ontario site plan can show:

existing house and structures;
proposed project footprint;
property boundaries and lot dimensions;
setback dimensions;
driveway, parking, and access layout;
lot coverage and hard surfaces;
grading and drainage notes;
trees and landscaping;
services and utility routes where known;
easements, right-of-ways, and nearby constraints.

A site plan is not a substitute for a legal survey, engineering, architectural design, zoning approval, or municipal review when those are required. But it is often the drawing that helps everyone understand the project layout before the more technical parts of the permit package are reviewed.

Need an Ontario Site Plan for a Building Permit?

If your municipality has asked for a site plan, or if you are preparing a permit package for a residential project, SitePlans.ca can help create a clear, permit-ready drawing based on your property information and project details.

We can help with site plans for Ontario projects such as garages, additions, decks, sheds, pools, fences, carports, retaining walls, garden suites, driveway changes, and other residential improvements.

Order your Ontario site plan from SitePlans.ca

Final Thoughts

An Ontario site plan is one of the most important drawings for many building permit projects. It shows how the proposed work fits on the property and helps municipal reviewers understand setbacks, property boundaries, access, drainage, trees, services, lot coverage, and existing structures.

Setbacks and surveys matter because they connect the proposed work to the legal lot. Municipal review matters because each Ontario city or town may have its own zoning, grading, tree, driveway, and application requirements.

Before submitting a building permit application, confirm your municipality’s checklist, verify property information, show the proposed work clearly, and prepare a site plan that makes the project easy to review.

Ontario Site Plan Services for Building Permits: Setbacks, Surveys, and Municipal Review