The Most Overlooked Step in Garage Permitting
Here's the uncomfortable truth about building a garage: the permit process often takes longer than the actual construction.
Garages are bigger than sheds. They require more concrete, more structural engineering, and more site-plan scrutiny. And the site plan is where most garage permit applications fall apart.
Your building department wants to see exactly where the garage sits relative to property lines, the house, easements, and any existing structures. They want to verify driveway access, impervious surface, and whether the garage meets height and setback requirements.
One missing dimension on your site plan, and your permit application heads straight to the reject pile.
A garage is a serious investment — often $15,000 to $50,000 or more. That's a lot of money to leave sitting in your yard while your permit application bounces between departments because the site plan wasn't clear enough.
SitePlans.AI changes that. You don't need a surveyor, you don't need CAD, and you don't need to wait on a drafter's calendar. Enter your address, see your property lines, place your garage, label the setbacks and dimensions, and export a clean PDF.
our site plan generator browserbased sofware is for preliminary, conceptual site plans where local rules allow homeowner or contractor-prepared drawings. It is not a licensed survey or sealed engineering plan. Always verify requirements with your local building department.
Who Needs a Garage Site Plan?
** building a new detached garage, converting a carport, or adding a garage to an existing home
- General contractors pulling permits for residential garage installations
- Small builders developing properties with garages
- Remodelers including garage work in their scope of renovation
- DIY homeowners who want to save money by preparing their own site plan
If your garage is attached to the house, you need a permit. If it's detached but over 200 square feet, you almost certainly need a permit. Some cities require a permit for any garage over 120 square feet. And if you're converting a carport into a garage, that's a structural change that always triggers permit review.
What a Garage Site Plan Looks Like
Here's an example of a garage site plan created with SitePlans.ai:
[IMAGE: Garage site plan created with SitePlans.ai showing property lines, existing house, driveway, and proposed garage with dimensions to property lines and setbacks]
A complete garage site plan typically includes:
| Element | What to Show |
|---|---|
| Property lines | Boundaries with dimensions |
| Existing structures | House, driveway, sheds, other structures |
| Garage location | Exact footprint of the new garage |
| Garage details | Size (length x width), height, number of bays, attached or detached |
| Setbacks | Distances from garage to property lines and structures |
| Driveway access | Location and width of driveway connecting to garage |
| Easements | Utility, drainage, or access easements |
| Impervious surface | Lot coverage calculations (if required) |
| North arrow & scale | Orientation and measurement reference |
| Title block | Address, owner name, project description, date |
How to Create a Garage Site Plan with SitePlans.ai
Step 1: Enter Your Address
Type your property address into the search bar. SitePlans.ai pulls property lines and site context so you're not starting from a blank page.
read full tutorial of how to correctly enter the address
Step 2: Confirm Your Parcel
Review the property lines shown on the map. If something looks off, verify with your county GIS or tax records.
read full tutorial on how to confirm selected select parcel
Step 3: Add Your Proposed Garage
Click the Structures tool and select "Garage" or "Accessory Structure." Place the garage footprint on your property where you plan to build it.
Step 4: Label Your Garage
Add key details: garage dimensions (length x width), height, number of bays, and whether it's attached or detached. Label distances from the garage to property lines and structures.
read full tutorial on how to adjust label
Step 5: Add Driveway Access
Show the driveway connecting to the garage. Label its width and any curb cut or right-of-way requirements.
Step 6: Add Setbacks and Easements
Show required setbacks from property lines. Note any utility easements or rights-of-way that affect garage placement.
read full guide on how to Generate setbacks
Step 7: Review and Export
Check that your title block shows the correct address and project description. Export your garage site plan as a PDF.
ead how to add [notes in title block sheet](support/generat-title-sheet)
Step 8: Submit or Upgrade
Submit your PDF with your permit application. Garage permits typically also require structural and electrical plans prepared by licensed professionals.
Read full support desk tutorial on how to properly export PDF Site Plan
If your project is complex or your city requires a human-reviewed plan, order a done-for-you permit-ready plan from SitePlans.us.
What to Check Before Exporting Your Garage Site Plan
- Property address is correct
- Property lines are accurate (verify with county records if unsure)
- Garage location is clearly shown with dimensions
- Garage size, height, and type (attached/detached) are labeled
- Setbacks from property lines and structures are shown
- Driveway access is shown with width
- Easements are noted if applicable
- Impervious surface calculations are included (if required)
- North arrow and scale are included
- Title block shows project name, owner, and date
Garage Site Plan Pricing
Start free. Upgrade when you need more.
| Plan | Best For | Features |
|---|---|---|
| Free / Basic | Homeowners with one garage project | Limited lookups, one project, basic PDF export |
| Contractor Pro | GCs, garage builders with multiple jobs | More projects, more address lookups, branded title blocks |
| Builder Plan | High-volume garage builders | More monthly plans, advanced layers, production use |
| Done-for-you (SitePlans.us) | Complex projects, rejections, urgent deadlines | Human-reviewed, permit-ready plan delivered fast |
Start with the free version to see if SitePlans.ai works for your garage project. Upgrade when you need more capacity or a done-for-you plan.
Garage Permit Site Plan Checklist
Before you submit your garage permit application, make sure your site plan includes:
- Property address — Full street address
- Property lines — All boundaries with dimensions
- Existing structures — House, driveway, sheds, other structures
- Proposed garage — Exact footprint, dimensions, height, type
- Setbacks — Distances from garage to property lines and structures
- Driveway access — Location and width
- Easements — Utility, drainage, or access easements
- Impervious surface — Lot coverage calculations (if required)
- North arrow — Orientation reference
- Scale — Drawing scale (e.g., 1" = 10')
- Title block — Project name, owner, date
Common Mistakes That Delay Garage Permits
| Mistake | What to Do Instead |
|---|---|
| No property lines shown | Always show property boundaries with dimensions |
| Missing garage dimensions | Label garage size clearly (e.g., "24' x 28'") |
| No setbacks | Show distances from garage to property lines |
| Forgetting driveway access | Show driveway location and width |
| Not indicating attached vs detached | Clearly label whether garage is attached or detached |
| Forgetting easements | Check for utility or drainage easements and note them |
| Hand-drawn sketch | Use a clean, scaled digital plan |
| No north arrow or scale | Always include orientation and measurement reference |
Garage Site Plan FAQ
1. Do I need a site plan for a garage permit?
Yes, virtually all jurisdictions require a site plan for a garage permit. The site plan shows property lines, existing structures, proposed garage location with dimensions, setbacks, and driveway access.
2. Can I use SitePlans.ai for a garage permit?
Yes, if your city accepts homeowner or contractor-prepared site plans. SitePlans.ai helps you create a preliminary, conceptual site plan from your address. Garage permits typically also require structural and electrical plans prepared by licensed professionals. Always verify requirements with your local building department.
3. What if my city requires a survey for a garage permit?
Some cities require a licensed survey for garage permits. SitePlans.ai is not a survey. If your city requires a surveyor's stamp, you'll need to hire a licensed professional. Check with your building department first.
4. What should a garage site plan show?
A garage site plan should show: property lines with dimensions, existing structures, proposed garage location and dimensions, setbacks from property lines and structures, driveway access, easements, impervious surface calculations (if required), north arrow, scale, and title block.
5. How much does a garage site plan cost?
SitePlans.ai offers a free basic plan for homeowners. Contractor Pro and Builder plans are available for professionals. Done-for-you permit-ready plans from SitePlans.us start at competitive rates. Start with the free version to see if it works for your project.
6. Can a homeowner draw their own garage site plan?
Yes, in most cities. Homeowners can prepare their own site plans for garage permits. SitePlans.ai makes it easy — just enter your address, see your property lines, add your proposed garage, driveway, and dimensions, and export a PDF.
7. What if my property lines don't look right?
Some areas show cleaner property lines than others. If your property lines don't look right, verify with your county GIS or tax assessor. You can also use the done-for-you option from SitePlans.us.
8. Can contractors use SitePlans.ai for client garage projects?
Yes. Contractor Pro and Builder plans are designed for GCs, garage builders, and small builders who need site plans for multiple client projects.
9. What if my permit reviewer asks for revisions?
If your garage site plan is rejected, you can revise it in SitePlans.ai and export a new PDF. For complex revisions or if the reviewer requires a sealed plan, consider the done-for-you option from SitePlans.us.
10. What if my garage is in a floodplain or has steep slopes?
Floodplains and steep slopes may have additional requirements. Your site plan may need to show floodplain limits or topography contours. Check with your local building department before submitting.
11. What are typical garage setback requirements?
Setback requirements vary by zoning district. Common ranges are 5-10 feet from property lines and 10-20 feet from the street. Check your local zoning ordinance for specific requirements.
12. Is an attached garage different from a detached garage for permitting?
Yes. Attached garages are considered part of the house and typically require more structural scrutiny. Detached garages may be treated more like accessory structures. Both require permits and site plans, but the specific requirements can vary.
13. Do I need to show impervious surface for a garage?
Yes. In most jurisdictions, garages count as impervious surface and contribute to your lot coverage limit. Check your local zoning ordinance for maximum impervious surface allowances.
14. Can I submit a garage site plan online?
Many jurisdictions now accept permit applications online. Check with your local building department for their preferred submission method.
Ready to Create Your Garage Site Plan?
Stop waiting on a drafter. Stop guessing where your garage can go. Enter your address, see your property lines, and create a professional garage site plan in minutes.
Create My Garage Site Plan Now
Need a human-reviewed, permit-ready plan?
Get a done-for-you garage site plan from SitePlans.us — for complex projects, rejections, or urgent deadlines.
Get a Done-for-You Permit-Ready Plan →
Important to Know
SitePlans.ai helps create preliminary and permit-style site plans for smaller residential projects where local rules allow homeowner or contractor-prepared drawings. It is not a licensed land survey, engineering plan, architectural plan, or legal boundary document. Garage permits typically also require structural and electrical plans prepared by licensed professionals. Always confirm requirements with the local building department before submitting.