Do you need a site plan for a shed?
It depends on your jurisdiction, but the pattern is consistent almost everywhere:
- Small sheds (commonly under 120–200 sq ft, depending on your town) may be exempt from a permit entirely — but often still must respect zoning setbacks, so a simple plan is still useful.
- Larger sheds and anything on a foundation almost always require a building permit with a site plan attached.
- Sheds with plumbing or electrical (a finished she-shed, workshop, or future ADU) typically need additional trade permits — and the site plan is still the first document they ask for.
Call your building department or check its website before anything else. Ask two questions: what size threshold triggers a permit, and what must the site plan show. The answer to the second question is almost always the same short list, covered below.
What your building department wants to see
A residential shed site plan is not an architectural drawing. Reviewers look for these elements:
| Element | Why it matters |
|---|---|
| Property boundary lines | Shows the reviewed work stays on your lot |
| Existing structures (house, garage, driveway) | Context for coverage and spacing rules |
| The proposed shed footprint, labeled and dimensioned | The thing being approved |
| Setback distances from the shed to each lot line | Proves compliance with zoning |
| North arrow | Orientation |
| Scale (e.g. 1" = 20') | So dimensions can be verified |
| Lot area and lot coverage % | Many codes cap the footprint of all structures |
| Title block (address, owner, date) | Identifies the application |
If you include those eight things, your plan looks like what a paid drafting service delivers — because it's the same information.
Check your setbacks before you draw
Setbacks are the minimum required distance between your shed and each property line. Common residential values in the US (verify yours — they vary a lot):
| Edge | Typical range |
|---|---|
| Rear yard | 5–10 ft |
| Side yards | 3–10 ft |
| Front yard | Accessory structures usually can't be in the front setback at all |
| From other structures | Sometimes 6–10 ft between the shed and your house for fire access |
Search your zoning code for “accessory structures” setbacks [your town] — that section governs sheds. Note also whether your code counts the shed toward a maximum lot coverage for all structures, which is usually a percentage of the lot.
How to draw it free in ZoneMapper (about 45 minutes)
1. Start from your address or upload a map
Enter your address and ZoneMapper loads public aerial imagery with the scale set automatically, plus a parcel outline from county GIS data where available. If you have a survey, plat, or tax map PDF, upload that instead — it's more accurate for property lines.
2. Calibrate the scale
For uploaded maps, click two points with a known distance between them (a property line with a labeled length is ideal) and enter the real distance. Everything downstream — setbacks, area, coverage — depends on this one step.
3. Trace your lot boundary
If address lookup already placed a parcel outline, compare it to your survey and keep it when it matches. Otherwise use the Lot boundary tool: click each corner of the property line, then choose Finish lot boundary. ZoneMapper calculates the lot area from that outline, including irregular lots. Use Lot boundary here, not the Polygon tool — setbacks and lot coverage only calculate from the lot boundary.
4. Draw the shed and existing structures
Draw the house, driveway, and other structures that are already built. In the Layers panel, mark those existing — existing shapes render with a dashed stroke. Draw the shed with the Rectangle tool and enter its real size (a 10×12 shed is 10 feet by 12 feet). Leave the shed as proposed, which stays a solid stroke so reviewers can tell new work from what is already there.
5. Set setbacks and add dimensions
In the Setbacks panel, enter your town's required distance for each edge. Restricted zones shade in red so you can see at a glance whether the shed fits. Use the Dimension tool to add lines from the shed to each lot line — reviewers check these numbers first.
6. Export the PDF
Export a print-ready PDF with a title block (address, owner, date), north arrow, and a stated scale like “1 inch = 20 feet.” Submit it with your permit application.
Common reasons shed permits get rejected
- Shed drawn in the front or street-side setback where accessory structures aren't allowed
- Missing or illegible dimension lines to the property lines
- Plan not to scale — a sketch with no stated scale is a frequent auto-reject
- Exceeding lot coverage once the shed footprint is added
- Shed placed over an easement (utility, drainage) — check your survey or plat for easement lines
FAQ
Can I hand-draw a shed site plan?
Often yes — many jurisdictions accept neat hand-drawn plans on graph paper. But it must be to scale with labeled dimensions. A free tool like ZoneMapper gets you a cleaner result faster, and printed output is easier for reviewers to verify.
Do I need a licensed surveyor?
Not for most residential shed permits. If your jurisdiction requires a stamped survey, or your lot lines are in dispute, you'll need one — call the building department and ask. Otherwise, a survey you already have (or county GIS lines, verified) is sufficient for the drawing itself.
How much does a shed site plan cost?
Drafting services typically charge $89–$259 per plan with 24–48 hour turnaround. Doing it yourself in a browser tool is free and takes under an hour.
More permit guides
ZoneMapper is a drafting aid. Setback, coverage, and permit requirements vary by jurisdiction — always verify against your local zoning code and building department before submitting an application.