Perry County, Illinois requires a building permit before most structures are erected, enlarged, altered or moved in unincorporated areas; a structure under 100 square feet does not need one.1 Perry County zoning applies outside municipalities that have adopted their own zoning, and those municipalities run their own zoning administration.2 Private-sewage permits for every address, city or not, come from the Perry County Health Department.3
At a glance
- Building permit
- Required for most structures; not required under 100 square feet1
- Zoning
- County zoning applies in unincorporated areas4
- Septic
- Health Department permit and inspection required35
- Home size
- Modular homes: 1,200 sq. ft.; mobile homes: 900 sq. ft.67
- Tiny homes
- Tiny-home occupancy unconfirmed; ask the county Zoning Administrator67
- Owner-builder
- No county permit exemption confirmed; limited plumbing exception89
- Private well
- Permit required before construction, modification or sealing10
Who to call
Building permits
Perry County Supervisor of Assessments
Perry County building-permit applications
3764 State Route 13-127, Pickneyville, Illinois 62274
Health department
Perry County Health Department
Private sewage disposal permits and environmental health questions
907 S MAIN ST - PINCKNEYVILLE IL 62274
Contact details are copied from each office’s official page and were checked against it on October 12, 2026.
Off-grid gear
Going off-grid in Perry County means bringing your own water and power. The kit we’d start with:
- Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
- Power Bluetti Solar generators and home battery backup for living off the grid.
- Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
- Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.
These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.
Do you need a building permit in Perry County, Illinois?
Perry County requires a building permit before a structure is erected, enlarged, extended, altered or relocated, or a mobile home is placed or relocated.1 The county webpage exempts structures under 100 square feet; the fee exemption covers structures or additions of 100 square feet or less, so confirm permit requirements at the boundary with the Supervisor of Assessments.111 Residential building permits cost $5 plus $0.02 per square foot; farm structures cost $5.11 Detached single-family homes in the R-1 and R-2 districts must follow the current International Residential Code.12
Who issues building permits in Perry County, Illinois?
The Perry County Supervisor of Assessments accepts building-permit applications from an owner or authorized agent; call (618) 357-2209.813 Obtain a Certificate of Zoning Compliance first, then submit the legal description, building size and type, and estimated cost.8 For unincorporated Perry County, the county lists the Zoning Administrator at 618-357-3267.14 Private-sewage permits stay with the Perry County Health Department throughout the county, including inside city limits.3
Does Perry County, Illinois have zoning?
County zoning applies in unincorporated Perry County, outside municipalities with adopted local zoning ordinances.4 Pinckneyville applies its own zoning inside city limits; private-sewage permits there still come from the Perry County Health Department.1516 County districts include agricultural, residential, commercial, industrial, floodplain-overlay and planned-unit-development districts.17 In R-1 and R-2, minimum setbacks are 35 feet front, 10 feet side and 25 feet rear, and the listed height limit is 25 feet.1819 In A and I, minimum setbacks are 50 feet front and 25 feet side and rear.18 Agricultural-purpose structures retain district setback requirements despite their zoning exemption.20 Using an accessory structure as a dwelling is prohibited under county zoning.21
How do septic permits work in Perry County, Illinois?
Off-grid sewage disposal in Perry County still requires a Health Department permit and inspection; going without public sewer does not remove those requirements.22 Call the Perry County Health Department at 618-357-5371.23 The application fee is $125, and a home using private sewage generally needs at least 1 acre excluding easements, with special consideration for certain preexisting smaller lots.24 Give at least 48 hours’ notice before work, and leave the system uncovered and unused until inspection and written approval.5 The Health Department may refuse a private-sewage permit when public or community sewer is available, including within 300 feet of a single-family home.25
Can you live in an RV or tiny home in Perry County, Illinois?
Perry County defines a travel trailer as designed for temporary occupancy; travel trailer parks require a special-use permit in the Commercial District.2627 We could not confirm full-time occupancy of an individual RV or permission to occupy a tiny home; ask the county Zoning Administrator about the proposed dwelling. Temporary campgrounds may operate up to 5 camping nights annually, with no night limit when allowing only up to 2 RVs or tents; that campground provision does not establish residential approval.28 In unincorporated Perry County, modular homes need at least 1,200 square feet and a full-perimeter permanent foundation below frost depth, with wheels and towing devices removed.6 Mobile homes need at least 900 square feet and a special-use permit.7
Building a home in Perry County, Illinois: steps in order
- Identify the zoning authority and district for the parcel.2
- Confirm permitted use, lot size, setbacks, height and permanent street access.1729181930
- Obtain a Certificate of Zoning Compliance before applying for the building permit.8
- Apply through the Supervisor of Assessments with the required project details.8
- Secure the Health Department's private-sewage permit if needed.3
- Obtain a permit before constructing or deepening a private well.10
- Arrange any required state-highway access permit.31
What should you check before buying land in Perry County?
Verify jurisdiction, zoning district, residential use, lot area and the buildable envelope.22918 Confirm County Board approval before buying a newly created parcel that falls within the subdivision rules.32 Only about 3.2% of county soils are mapped without severe limitations for conventional drain fields, so make sewage feasibility a purchase contingency.33 Check permanent street access, floodplain constraints and private-well permitting before placing improvements.303410
Watch-outs
- Zoning compliance comes before the building-permit application.8
- A private sewage system cannot be covered or used before inspection and written approval.5
- An owner may apply for a permit, but we could not confirm a general owner-builder exemption from Perry County's rules; Illinois provides only a limited plumbing exception for qualifying owner-occupants.89
Sources
- Building Permits - Perry County, Illinois, quoted and re-checked
- Perry County Zoning Code, Chapter 40, quoted and re-checked
- Chapter 16 Health Codes, quoted and re-checked
- Chapter 40 Zoning Code, quoted and re-checked
- perrycountyil.gov, quoted and re-checked
- Zoning Code Chapter 40, quoted and re-checked
- Zoning Code Chapter 40, quoted and re-checked
- Building Permits - Perry County, Illinois, quoted and re-checked
- HB5913 Enrolled — Illinois Plumbing License Law amendment (Illinois statewide rule), quoted and re-checked
- Private Water & Closed Loop Wells - Illinois Department of Public Health, quoted and re-checked
- Building Permits - Perry County, Illinois, quoted and re-checked
- Chapter 40 Zoning Code, quoted and re-checked
- Perry County Supervisor of Assessments (ptab.illinois.gov)
- Building Permits - Perry County, Illinois, quoted and re-checked
- Pinckneyville: § 154.002 Jurisdiction (Perry County), quoted and re-checked
- Pinckneyville: § 154.091 Sewers; septic tanks (Perry County), quoted and re-checked
- Chapter 40 Zoning Code, quoted and re-checked
- Chapter 40 Zoning Code, Section 40-4-31, quoted and re-checked
- Chapter 40 Zoning Code, quoted and re-checked
- Chapter 40 Zoning Code, quoted and re-checked
- Chapter 40 Zoning Code, quoted and re-checked
- Chapter 16 Health Codes, quoted and re-checked
- Perry County Health Department (perryhealth.net)
- perrycountyil.gov, quoted and re-checked
- perrycountyil.gov, quoted and re-checked
- Perry County Zoning Code, Chapter 40, quoted and re-checked
- Chapter 40 Zoning Code, quoted and re-checked
- Revised Code, Chapter 6 Buildings, quoted and re-checked
- Chapter 40 Zoning Code, quoted and re-checked
- Perry County Zoning Code, Chapter 40, quoted and re-checked
- Highway Permits (Illinois statewide rule), quoted and re-checked
- Chapter 34 Subdivision Code, quoted and re-checked
- Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
- Permit Program (Illinois statewide rule), quoted and re-checked
Written October 12, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.