Illinois
Site Plans & Permit Drawings in Illinois
Permit-ready site plans and drawings for properties in all 102 counties of Illinois, drafted from your address to your local permit office’s rules. No site visit.
- 102 counties served
- No site visit
- Local rules checked
- Licensed PE partner
Quick answer
Do You Need a Site Plan for a Permit in Illinois?
Yes, most building permits in Illinois need a site plan: a scaled drawing of the lot, existing buildings and the new work, with distances to the property lines. In Illinois, cities issue building permits inside their limits and the county issues them in unincorporated areas. Your address decides which office reviews your plans. We check that office’s requirements before quoting.
- Permits issued by
- City building departments; the county in unincorporated areas
- Building code
- Local adoption of the International Codes; editions vary by city and county
- Counties
- 102 in Illinois, all served
- Largest
- Cook County (5.1M), DuPage County (921K), Lake County (709K), Will County (701K), Kane County (515K)
- Site visit
- None. We draft from parcel records, aerial imagery and your documents
Counties we serve
All 102 Illinois Counties
We prepare drawings for properties in every county in Illinois, and check the rules of the city or county that issues your permit.
A
- Adams County
- Alexander County
B
- Bond County
- Boone County
- Brown County
- Bureau County
C
- Calhoun County
- Carroll County
- Cass County
- Champaign County
- Christian County
- Clark County
- Clay County
- Clinton County
- Coles County
- Cook County
- Crawford County
- Cumberland County
D
- De Witt County
- DeKalb County
- Douglas County
- DuPage County
E
- Edgar County
- Edwards County
- Effingham County
F
- Fayette County
- Ford County
- Franklin County
- Fulton County
G
- Gallatin County
- Greene County
- Grundy County
H
- Hamilton County
- Hancock County
- Hardin County
- Henderson County
- Henry County
I
- Iroquois County
J
- Jackson County
- Jasper County
- Jefferson County
- Jersey County
- Jo Daviess County
- Johnson County
K
- Kane County
- Kankakee County
- Kendall County
- Knox County
L
- Lake County
- LaSalle County
- Lawrence County
- Lee County
- Livingston County
- Logan County
M
- Macon County
- Macoupin County
- Madison County
- Marion County
- Marshall County
- Mason County
- Massac County
- McDonough County
- McHenry County
- McLean County
- Menard County
- Mercer County
- Monroe County
- Montgomery County
- Morgan County
- Moultrie County
O
- Ogle County
P
- Peoria County
- Perry County
- Piatt County
- Pike County
- Pope County
- Pulaski County
- Putnam County
R
- Randolph County
- Richland County
- Rock Island County
S
- Saline County
- Sangamon County
- Schuyler County
- Scott County
- Shelby County
- St. Clair County
- Stark County
- Stephenson County
T
- Tazewell County
U
- Union County
V
- Vermilion County
W
- Wabash County
- Warren County
- Washington County
- Wayne County
- White County
- Whiteside County
- Will County
- Williamson County
- Winnebago County
- Woodford County
No match. We serve every county in Illinois; check the spelling, or send us your address
Counties and population: U.S. Census Bureau, 2023 county population estimates.
Local conditions
What to Know About Permits in Illinois
What changes the drawings in Illinois. Exact numbers like setbacks and frost depth are set locally; we look them up for your address.
- Who reviews your permitIn Illinois, cities issue building permits inside their limits and the county issues them in unincorporated areas. Your address decides which office reviews your plans.
- Flood zonesCheck your parcel on FEMA’s Flood Map Service Center. In a mapped flood zone, permit offices in Illinois usually want the zone shown on the site plan, and some work needs an elevation certificate. FEMA flood map
- Earthquake designParts of Illinois fall in higher seismic design categories, so foundations, retaining walls and additions can draw extra structural review.
- Deep frost linesCold winters push frost deep into the ground in Illinois, so deck, porch and garage footings must reach below the frost depth your county sets.
Services
Drawings We Prepare in Illinois
Every service, for any property in the state. Ordered together, the sheets are drawn to match.
- Site PlansLot lines, setbacks and new work
- Floor PlansExisting and proposed layouts
- Elevation DrawingsHeights, roof pitch, materials
- 3D RenderingsRealistic views for HOAs and buyers
- Subdivision PlansLot split layouts
- Engineer-Stamped PlansSealed where our PE partner is licensed
- Full Permit SetsEvery sheet, drawn to agree
- Permit CorrectionsRevisions after reviewer comments
Deck & PorchUsually, for attached decks or decks more than 30 inches above the ground.
FenceOften, especially for fences over 6 feet, front-yard fences or corner lots.
Pool & SpaYes, almost everywhere, for in-ground pools and most above-ground pools and spas.
Shed & OutbuildingOften for sheds over about 120 to 200 square feet, or with power.
ADUYes. An ADU is a dwelling, so it needs a full building permit.
Home AdditionYes, any addition that adds floor area needs a building permit.
Illinois FAQ
Permits in Illinois
Short answers to what people ask before ordering. Ask anything else in your quote request.
Get Price QuoteDo you serve every county in Illinois?
Yes. We prepare drawings for properties in all 102 counties of Illinois, from Cook County to Hardin County.
Who issues building permits in Illinois?
In Illinois, cities issue building permits inside their limits and the county issues them in unincorporated areas. Your address decides which office reviews your plans.
Does Illinois have a statewide building code?
Not one single code for every address. Cities and counties in Illinois adopt editions of the International Codes, so the rules depend on where the property is.
Do you need to visit my property in Illinois?
No. We work from your address, county parcel records, aerial imagery and any survey, plans or photos you send.
Can you provide engineer-stamped plans in Illinois?
Our licensed Professional Engineer partner seals eligible plans in the states where they’re licensed. We confirm coverage for your project before you pay.