How to Create a Site Plan for Your Building Permit Application
Nearly every municipality in North America requires a site plan when you apply for a building permit. Whether you are adding a deck, building a garage, installing a pool, or constructing a new home, your local building department needs to see exactly where structures will sit on your property and how they relate to lot boundaries. This guide walks you through everything you need to know to create a compliant site plan.
What Is a Site Plan?
A site plan (sometimes called a plot plan) is a scaled drawing that shows your property from above. It illustrates the relationship between your lot boundaries and all existing or proposed improvements. Unlike a floor plan, which shows the interior of a building, a site plan focuses on the outdoor layout of your property.
The primary purpose of a site plan is to help zoning officials verify that your project meets all applicable setback requirements, lot coverage limits, height restrictions, and other zoning regulations before construction begins.
Required Elements of a Site Plan
While requirements vary by municipality, most building departments expect your site plan to include the following elements:
- Property lines — Clearly drawn boundaries with dimensions (length of each side)
- Existing structures — All current buildings, sheds, garages, and permanent structures
- Proposed construction — What you plan to build, clearly distinguished from existing structures
- Setback distances — Measurements from each structure to the nearest property line
- Lot dimensions — Total width, depth, and area of the property
- North arrow — Indicates the orientation of the property
- Scale — A consistent scale (e.g., 1 inch = 20 feet)
- Street names — Adjacent roads and rights-of-way
- Driveways and walkways — Paved surfaces and access points
- Easements — Any utility or drainage easements crossing the property
Tip: Check with your local building department before you start. Some municipalities provide a template or specific format requirements. Many accept hand-drawn plans if they are clear, legible, and drawn to scale.
Understanding Setback Requirements
Setbacks are the minimum distances that structures must be placed from property lines. They exist to ensure adequate space between buildings, maintain sight lines for traffic, preserve neighborhood character, and provide access for emergency vehicles and utilities.
Setback requirements are defined by your local zoning bylaws and vary depending on the zone (residential, commercial, agricultural) and the type of structure being built. Here are typical residential setback values:
| Setback Type | Typical Range | Common Value | Notes |
|---|---|---|---|
| Front yard | 15–35 ft (4.5–10.5 m) | 25 ft (7.5 m) | Measured from front property line or road right-of-way |
| Rear yard | 15–40 ft (4.5–12 m) | 25 ft (7.5 m) | Often reduced for accessory structures (sheds, garages) |
| Side yard | 5–15 ft (1.5–4.5 m) | 8 ft (2.4 m) | Both sides; corner lots may have larger street-side setbacks |
| Waterfront | 50–100 ft (15–30 m) | 75 ft (23 m) | Distance from high water mark; varies greatly by jurisdiction |
| Accessory structures | 3–10 ft (1–3 m) | 5 ft (1.5 m) | Sheds, detached garages; often have reduced setbacks |
Important: These are general guidelines only. Your actual setback requirements are determined by your municipal zoning bylaws. Always verify the exact requirements with your local building department before preparing your site plan.
Step-by-Step Process
Step 1: Gather your existing documents
Start by locating your existing property survey or location certificate. This document, typically prepared when you purchased your home, shows the legal boundaries and dimensions of your lot. If you do not have one, check with your title company, real estate attorney, or the local land records office.
Step 2: Verify your zoning requirements
Contact your local building department or visit their website to determine the zoning classification of your property. Look up the specific setback requirements, maximum lot coverage percentage, height limits, and any other regulations that apply to your project.
Step 3: Measure existing structures
Using a tape measure, verify the dimensions of all existing structures on your property. Measure the distance from each structure to the nearest property lines. These are your existing setback distances. If your survey already shows this information, you can use those measurements as a starting point.
Step 4: Draw your site plan
Using graph paper or digital tools, draw your property to scale. Start with the property lines, then add existing structures, and finally draw your proposed construction. Label all dimensions, setbacks, and required elements. Make sure the proposed structure meets all minimum setback requirements.
Step 5: Review and submit
Double-check all measurements and ensure your plan includes every required element. Many applications are rejected or delayed because of missing information. Submit the site plan along with your building permit application and any other required documents.
How LotScan Automates Site Plan Creation
Creating a site plan from scratch can be tedious and time-consuming. LotScan streamlines the entire process by using artificial intelligence to analyze your existing property survey or location certificate.
Here is how it works:
- Import your survey — Take a photo or upload a scan of your existing property survey
- AI detection — LotScan instantly identifies property lines, structures, pools, dimensions, and setbacks
- OCR extraction — Measurements are automatically extracted from the document using optical character recognition
- Edit and customize — Use the built-in editor to add proposed construction, adjust elements, and annotate your plan
- Export — Generate a clean, professional site plan ready for your permit application
Time savings: What typically takes hours of manual measuring and drafting can be accomplished in minutes with LotScan. The AI handles the tedious work of identifying and digitizing elements from your existing survey.
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