Bolthole Index

Jersey County, Illinois

Zoning, building permits and septic rules in Grafton, Illinois

The City of Grafton, Illinois, in Jersey County, administers its own zoning code inside city limits1. We could not confirm how building permits work inside the city, so ask Grafton City Hall before you build2. Septic permits fall under the state sewage code, with the Jersey County Health Department as the local contact3. Jersey County's building rules cover unincorporated land only4.

At a glance

Zoning
Yes, Grafton adopts its own zoning districts (R-1, R-2, R-3, R-4, B-1, B-2, MH-1, I-1 and others)15
Minimum lot size
10,000 sq ft in R-1; 8,000 sq ft in R-267
Minimum home size
1,450 sq ft for a single-floor home in R-1; 1,000 sq ft in R-2 and R-389
R-1 setbacks
20 ft from the front lot line, 10 ft from each side lot line10
Building permit inside the city
Not confirmed; ask Grafton City Hall2
Septic permit
Required under the state sewage code; $250 fee at the Jersey County Health Department3
Water well permit
Required for installing or sealing a well; $100 fee written to the State of Illinois11

Who to call

Building permits

City of Grafton, City Hall

Receives the city's permit forms and payments; the city's zoning code applies inside Grafton city limits

618-786-3344

[email protected]

118 E Main Street, Grafton, Illinois 62037

Septic permits

Jersey County Health Department, Environmental Health

Private sewage-disposal permits and water-well permits in Jersey County

618-498-9565

1307 State Highway 109, Jerseyville, IL 62052

Contact details are copied from each office’s official page and were checked against it on October 24, 2026.

Off-grid gear

Going off-grid in Grafton means bringing your own water and power. The kit we’d start with:

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Does Grafton, Illinois have zoning, and what does it mean for lot size and setbacks?

Yes. The City of Grafton administers its own zoning code for land inside city limits1. Grafton's code lists districts including R-1, R-2, R-3, R-4, B-1, B-2, MH-1 and I-15. Which district a lot sits in decides nearly everything below.

  • R-1 (single family): one principal dwelling on a lot of at least 10,000 sq ft6. This district is generally located on top of the bluffs6. Buildings must sit at least 20 feet back from the front lot line and 10 feet from each side lot line unless a variance is granted10.
  • R-2 (single family, medium density): lots of at least 8,000 sq ft7.
  • Home size: a single-floor home in R-1 must have at least 1,450 sq ft, not counting the garage8. In R-2 and R-3, a new dwelling needs at least 1,000 sq ft of livable space9.
  • Garage and driveway: new R-1 homes must include an attached garage of at least 240 sq ft with a concrete or masonry driveway12.

Grafton's detailed area-and-bulk schedule may use different figures than the district descriptions, so confirm a specific lot with City Hall before you buy6. Setbacks for the other residential districts, and Grafton's rules on RVs, tiny homes and accessory dwellings, are not confirmed here.

Do you need a building permit in Grafton, and who issues it?

We could not confirm Grafton's building-permit requirements, fees or inspection process. Illinois does not issue building permits for privately funded construction; any permit is handled by the local government13. For a lot inside Grafton, that means the City of Grafton, which takes permit forms and payment at City Hall, 118 E Main Street2. Call 618-786-3344 or email [email protected] to ask what a house, garage or addition needs2.

The Jersey County Code Administrator's building permits apply to unincorporated Jersey County, not to lots inside Grafton4. A statewide building-code baseline has applied across Illinois since 2025, whether or not a town adopts its own code14.

How do septic permits and wells work for a lot in Grafton?

Illinois's sewage code requires a permit for anyone installing or replacing a septic system, and the Jersey County Health Department lists a $250 permit fee3. For questions on installing or repairing a private sewage system, the county points callers to its Environmental Health Department at 618-498-9565 ext. 32115. Whether a lot inside Grafton must connect to city sewer instead is not confirmed; ask City Hall first2.

Installing or sealing a water well also needs a permit, with a $100 fee written to the State of Illinois11. Across Jersey County, USDA rates about 25% of soils as not limited for a conventional septic drain field, so many lots need a site evaluation or an engineered system16.

Can you live in an RV or tiny home in Grafton?

We could not confirm whether Grafton allows RVs or tiny homes as dwellings, or how long a temporary stay may last. Ask Grafton City Hall in writing before you buy a lot for that purpose2. Illinois's campground licensing law covers licensed campgrounds, so it does not answer whether you can live in an RV on your own lot17. The 180-day travel-trailer floodplain rule on Jersey County's page applies to unincorporated land; incorporated municipalities participate in the flood insurance program separately18.

Building a home in Grafton: the steps, in order

  1. Ask Grafton City Hall which zoning district the lot is in and what the building-permit process requires2.
  2. Check the district rules: lot size, setbacks and minimum home size5.
  3. Ask City Hall whether the lot connects to city sewer; if not, apply to the Jersey County Health Department for a septic permit3.
  4. If you need a private well, get the state well permit11.
  5. If the lot is in a floodplain or you plan to build in a floodway, ask about an Illinois Department of Natural Resources permit19.
  6. If the driveway will meet a state route, get a state access permit20.

What stays with Jersey County, and what to check before you buy in Grafton?

Septic and well permits for Grafton addresses come through the Jersey County Health Department and the state, not a city office311. For land outside city limits, see the Jersey County page for the county's rules, which differ from the city's.

Costs are county-level: Jersey County's effective property tax rate is 1.8%21 with a median tax bill of $2,957 a year22, and the typical home value is $205,28523.

Watch-outs

  • We could not confirm Grafton's building-permit, inspection, fee or occupancy-certificate rules; ask Grafton City Hall before you sign or build2.
  • The lot sizes and setbacks above come from district descriptions; Grafton's separate area-and-bulk schedule may differ, so confirm the numbers for your specific lot6.
  • A lot near the Mississippi may be in a regulated floodplain, which can need a state permit on top of anything Grafton requires19.
  • Jersey County's building permit and floodplain rules apply to unincorporated land, not lots inside Grafton city limits4.

Sources

  1. Grafton city code 9-3-2 zoning district descriptions; 9-3-2-1 R-1 Single Family; 9-3-2-2 R-2 and R-3 (Grafton), quoted and re-checked
  2. City of Grafton, City Hall (cityofgraftonil.com)
  3. Environmental Programs, quoted and re-checked
  4. Building Permits & Guidelines - Jersey County Government, quoted and re-checked
  5. Grafton city code 9-3-2 zoning district descriptions; 9-3-2-1 R-1 Single Family; 9-3-2-2 R-2 and R-3 (Grafton), quoted and re-checked
  6. Grafton city code 9-3-2 zoning district descriptions; 9-3-2-1 R-1 Single Family; 9-3-2-2 R-2 and R-3 (Grafton), quoted and re-checked
  7. Grafton city code 9-3-2 zoning district descriptions; 9-3-2-1 R-1 Single Family; 9-3-2-2 R-2 and R-3 (Grafton), quoted and re-checked
  8. Grafton city code 9-3-2 zoning district descriptions; 9-3-2-1 R-1 Single Family; 9-3-2-2 R-2 and R-3 (Grafton), quoted and re-checked
  9. Grafton city code 9-3-2 zoning district descriptions; 9-3-2-1 R-1 Single Family; 9-3-2-2 R-2 and R-3 (Grafton), quoted and re-checked
  10. Grafton city code 9-3-2 zoning district descriptions; 9-3-2-1 R-1 Single Family; 9-3-2-2 R-2 and R-3 (Grafton), quoted and re-checked
  11. jerseycountyhealth.org, quoted and re-checked
  12. Grafton city code 9-3-2 zoning district descriptions; 9-3-2-1 R-1 Single Family; 9-3-2-2 R-2 and R-3 (Grafton), quoted and re-checked
  13. Illinois Codes FAQ (Illinois statewide rule), quoted and re-checked
  14. Illinois Codes (Illinois statewide rule), quoted and re-checked
  15. Jersey County Health Department, Environmental Health (jerseycountyhealth.org)
  16. 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
  17. Youth Camps and Campgrounds (Illinois statewide rule), quoted and re-checked
  18. Floodplain Information - Jersey County Government, quoted and re-checked
  19. Permit Program (Illinois statewide rule), quoted and re-checked
  20. Highway Permits (Illinois statewide rule), quoted and re-checked
  21. Effective property tax rate: Bolthole Index county data
  22. Median property tax bill: Bolthole Index county data
  23. Typical home value (Zillow): Bolthole Index county data

Written October 24, 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.

Answers from the rulebook for Grafton

Grafton’s own rules

  • Local zoningPresent (with conditions)

    Land inside Grafton city limits. Grafton city administers its own zoning code under Title 9 (Zoning).

    • District uses and standards point to 'the zoning code of the city as in effect upon the effective date of this code'; the separate zoning code and the 9-3-18 area and bulk schedule were not opened.
    • Code current through ord. 781, passed July 15, 2025; the publisher disclaims that the posted text may not reflect the most current legislation.
    “the r-1 zoning district shall be subject to all of the permitted uses, accessory uses, prohibited uses, special uses, and area and bulk regulations and parking requirements as established as applicable to r-1 zoning districts by the zoning code of the city”
  • Zoning districtsPublished

    Zoning districts inside Grafton city limits

    • District list is in 9-3-2 zoning district descriptions (R-1, R-2, R-3, R-4, B-1, B-2, MH-1, I-1 and others). Only R-1, R-2, R-3, R-4 and MH-1 descriptions were read.
    • Zoning map is adopted annually under 9-3-3 (not opened).
    “a. r-1, single family: a zone characterized by one principal dwelling on a low density (min. 10,000 sq. ft.) lot.”
  • Minimum dwelling sizeSpecified

    New dwellings in the R-1 single family zoning district inside Grafton city (single-floor dwelling minimum shown)

    • Applies to any dwelling constructed from or after the effective date of this code.
    • Other configurations: split level 1,000 sq ft above grade and 1,400 sq ft total; 1.5-story 1,000 sq ft above grade and 1,500 sq ft total; two-story 1,700 sq ft; all not including garage.
    • Section is marked (ord. passed 8-3-2022).

    minimum livable floor area, single-floor dwelling: >= 1450 sq ft (not including garage; split-level, 1.5-story and two-story dwellings have separate minimums)

    “single floor dwelling must contain at least one thousand four hundred fifty (1,450) square feet not including garage.”
    One more reviewed finding on this topic
  • Minimum lot sizeSpecified

    R-1 single family zoning district inside Grafton city (low density lot)

    • Figure is stated in the district description in 9-3-2; the detailed area and bulk schedule in 9-3-18 and the separate zoning code were not opened, so a different schedule figure may control.
    • District is generally located on top of the bluffs.

    minimum lot area: >= 10000 sq ft

    “a. r-1, single family: a zone characterized by one principal dwelling on a low density (min. 10,000 sq. ft.) lot.”
    One more reviewed finding on this topic
  • SetbacksSpecified

    Principal buildings and residential dwellings in the R-1 single family zoning district inside Grafton city

    • A variance may be granted for topography or other circumstances that reasonably require a variance to facilitate reasonable use of a lot.
    • R-2/R-3 and R-4 setbacks were not located in the text read; the 9-3-18 schedule and 9-3-10 through 9-3-12 front setback sections were not opened.

    front setback: >= 20 ft (variance may be granted) · side setback: >= 10 ft (variance may be granted)

    “all buildings and/or residential dwellings shall be constructed a minimum of twenty feet (20') back from the front lot line of each lot and a minimum of ten feet (10') back from the side lot line of each lot, unless a variance is granted”
  • Building heightSpecified

    Detached garages and accessory or service buildings ancillary to the principal dwelling in the R-1 district inside Grafton city (accessory height limit only)

    • This is a cap relative to the principal dwelling, not a numeric height limit for principal buildings.
    • Accessory building must have at least 400 sq ft interior space (subsection g).
    • 9-3-13 exceptions to height limits was not opened.
    “the height of any such detached garage, accessory or service building may not exceed the height of the principal residential dwelling on each lot.”
  • Driveway accessRequired

    New dwellings in the R-1 single family zoning district inside Grafton city

    • Required as part of initial construction: attached garage of at least 240 sq ft with a concrete or masonry driveway.
    • This is a zoning-district condition; it does not address curb cuts or access permits in Title 7 or Title 8, which were not opened.

    attached garage minimum: >= 240 sq ft (concrete or masonry driveway)

    “all dwellings to be constructed from or after the effective date of this code must include in their initial construction, an attached garage of at least two hundred forty (240) square feet with a concrete or masonry driveway.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Grafton or Jersey County directly.

  • Building permit — New construction and alterations inside Grafton city
  • Owner-builder exemption — Owner-builder construction of a home inside Grafton city
  • Building code adopted — Building codes for construction inside Grafton city
  • Inspections — Inspections of construction inside Grafton city
  • Certificate of occupancy — Occupancy certificates for new dwellings inside Grafton city
17 more unanswered
  • Lot coverage
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Accessory dwellings
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Subdividing land
  • Building in a floodplain
  • Short-term rentals
  • Permit fees
  • Permit process

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Unanswered questions are usually a sign that Grafton publishes no rule on the point, not that none exists. Jersey County’s page lists the county offices to call.

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