Bolthole Index

Grundy County, Illinois

Building permits, zoning and septic in Village of Diamond, Illinois

Village of Diamond, Illinois handles building permit applications through its Zoning Administrator and applies its own zoning rules inside village limits.12 For a Diamond property in Grundy County, private septic systems go through the Grundy County Health Department Environmental Health Division.3 Ask the village building department about the building permit required for your project; the village publishes applications for new residential construction, additions and alterations.4

At a glance

Building permits
Village building department; residential construction, addition and alteration applications are online.4
Zoning
Village zoning districts control construction, land use and occupancy.2
Septic permits
Grundy County Health Department Environmental Health for Grundy County properties.35
Lot size
In R-2, a one-family detached dwelling needs at least 6,000 sq. ft. of lot area.6
Coverage and height
R-2 one-family detached dwellings: maximum 35% lot coverage and 30 ft. building height.78
Owner-builder plumbing
Illinois allows qualifying residents to do their own single-family plumbing; local plumbing permits can still apply.910

Who to call

Building permits

Village of Diamond Building Department

Building permit application forms and building department questions inside Diamond village limits.

(815) 634-8149 ext. 2

[email protected]

1750 East Division Street Diamond, IL 60416

Online permits →

Zoning

Village of Diamond Planning, Zoning and Building Department

Village zoning administration, building application processing, plan review and inspection coordination.

815.634.8149

[email protected]

1750 East Division Street Diamond, IL 60416

Online permits →

Septic permits

Grundy County Health Department, Environmental Health Division

Private sewage disposal system plan review, septic permits and installation inspections, plus private well permit processing for Grundy County properties.

(815) 941-3115

[email protected]

1320 Union St. Morris, IL 60450

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 Village of Diamond means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Village of Diamond, IL?

For a home inside Village of Diamond, start with the village building department: Diamond publishes building permit application forms for residential new construction, additions and alterations, as well as decks, detached garages, fences and sheds.4 The Zoning Administrator processes building permit applications and coordinates plan review and inspection services.1 Ask the building department to identify the application, required drawings and building permit fee for your exact scope of work; Diamond makes a building permit and development fee schedule available through its online forms.1

Does Village of Diamond have zoning, lot-size rules and setbacks?

Village of Diamond zoning controls construction, alteration, land use, occupancy, excavation and grading according to the parcel’s zoning district.2 In Diamond’s R-2 Two-Family Residence District, a one-family detached dwelling has a minimum lot area of 6,000 sq. ft.; the same table specifies a 50 ft. minimum lot width and 30 ft. minimum front and rear yards.6 That use in R-2 also has maximum lot coverage of 35% and a maximum building height of 30 ft.78 Ask the village Zoning Administrator to confirm the district and side-yard footnotes before laying out a house, garage or addition; the village department implements the zoning ordinance.1

How do septic permits work inside Village of Diamond?

For a Village of Diamond property in Grundy County that needs private sewage disposal, the Grundy County Health Department Environmental Health Division reviews the proposed system, issues septic permits for compliant systems and inspects installation.5 Illinois requires plan approval before construction of a new private sewage disposal system, with notice to the administering authority at least 48 hours before construction, installation, repair or modification begins.11 The health department says an approved water and sewage system permit is needed before a building permit; coordinate that approval with Diamond’s building department for a private-system project.54 Ask Diamond’s Zoning Administrator about sewer availability and connection requirements for the address before commissioning septic plans.1

Can you live in an RV or tiny home in Village of Diamond?

We could not confirm a Village of Diamond rule allowing residential RV occupancy, camping during construction or tiny-home occupancy; ask the village Zoning Administrator about the proposed use before buying a trailer or committing to a house design.21 Diamond’s zoning rule expressly makes occupancy and land use subject to the parcel’s zoning district, so a vacant lot is not enough to establish that the intended living arrangement is allowed.2 We also could not confirm a village minimum dwelling size or accessory-dwelling rule; request an answer for the specific parcel and dwelling type from the village department that implements the zoning ordinance.1

What are the steps to building a home in Village of Diamond?

Start by asking Diamond’s Zoning Administrator to confirm the parcel’s district and whether the proposed home and site layout comply with village zoning.21 Next, settle water and sewage arrangements; for a Grundy County private-system property, ask Environmental Health about the water and sewage approval needed before a building permit.5 Submit the village’s residential building permit application and ask for the project’s plan-review requirements and fee schedule.41 Diamond uses village staff or an outside consultant for plan review depending on the work’s scale, and building inspections require at least 24-hour notice.1 Ask the village building department which inspections and occupancy approval your home needs before scheduling the move.1

What should you check before buying land in Village of Diamond?

For land outside village limits, read the Grundy County guide; the county’s zoning requirement applies to unincorporated Grundy County, while Diamond has its own village zoning.122 For a private well on a Grundy County property, Environmental Health processes well permit applications, and Illinois requires a permit before constructing, modifying or sealing a water well.513 Owner-builders should also separate plumbing eligibility from building approval: Illinois permits qualifying residents to perform plumbing on their own single-family residence, subject to code and inspection requirements, but local plumbing permits may still be required.910 Ask Diamond’s building department to resolve the building permit and occupancy requirements for your project.4

Watch-outs

  • Diamond’s R-2 lot, coverage and height figures above apply to one-family detached dwellings in that district; ask the village Zoning Administrator about the district and use proposed for your parcel.6781
  • We could not confirm village RV occupancy, tiny-home occupancy or agricultural building exemptions; ask Diamond’s Zoning Administrator before relying on any of those options.21
  • Diamond requires contractors working in the village to register annually; ask the village building department to confirm registration before work begins.1

Sources

  1. Village of Diamond Planning, Zoning and Building Department (villageofdiamond.org)
  2. § 151.056 Districts (Village of Diamond), quoted and re-checked
  3. Environmental Health, quoted and re-checked
  4. Village of Diamond Building Department (villageofdiamond.org)
  5. Grundy County Health Department, Environmental Health Division (grundycountyil.gov)
  6. § 151.080 Residence district bulk regulations (Village of Diamond), quoted and re-checked
  7. § 151.080 Residence district bulk regulations (Village of Diamond), quoted and re-checked
  8. § 151.080 Residence district bulk regulations (Village of Diamond), quoted and re-checked
  9. HB5913 Enrolled — Illinois Plumbing License Law amendment (Illinois statewide rule), quoted and re-checked
  10. 225 ILCS 320/18 — Local regulation; Department standards (Illinois statewide rule), quoted and re-checked
  11. 77 Ill. Adm. Code 905.190 Installation Approval (Illinois statewide rule), quoted and re-checked
  12. codelibrary.amlegal.com, quoted and re-checked
  13. 77 Ill. Admin. Code 920.130, Water Well Permit Requirements (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.

Answers from the rulebook for Village of Diamond

Village of Diamond’s own rules

  • Local zoningPresent

    Land inside Diamond village.

    • The zoning chapter applies by zoning district; special uses require a special use permit.
    “No building or structure or part thereof shall hereafter be erected, constructed, reconstructed, enlarged, moved or structurally altered, and no building, structure, or land shall hereafter be used, occupied, or arranged or designed for use or occupancy, nor shall any excavating or grading be commenced in connection with any of the above matters, except as permitted by the regulations herein which are applicable to the zoning district which such building, structure, or land is located.”
  • Minimum lot sizeSpecified

    One-family detached dwellings in the R-2 Two-Family Residence District.

    • The quoted table also specifies lot width and other bulk controls.

    minimum lot area: 6000 sq. ft.

    “(B) R-2 2-Family Residence District. | Minimum Lot Area (sq. ft.) | Minimum Lot Width | Minimum Front Yard Setback | Minimum Side Yard Setback | Minimum Rear Yard Setback | Maximum Lot Coverage | Maximum Building Height One-family detached dwelling | 6,000 | 50 ft. | 30 ft. | 6 ft./ 15 ft. 1 | 30 ft. | 35% | 30 ft.”
  • Lot coverageSpecified

    One-family detached dwellings in the R-2 Two-Family Residence District.

    maximum lot coverage: 35 percent

    “One-family detached dwelling | 6,000 | 50 ft. | 30 ft. | 6 ft./ 15 ft. 1 | 30 ft. | 35% | 30 ft.”
  • Building heightSpecified

    One-family detached dwellings in the R-2 Two-Family Residence District.

    maximum building height: 30 ft.

    “One-family detached dwelling | 6,000 | 50 ft. | 30 ft. | 6 ft./ 15 ft. 1 | 30 ft. | 35% | 30 ft.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Village of Diamond or Grundy County directly.

  • Building permit — Building work inside Diamond village.
  • Owner-builder exemption — Owner-builders inside Diamond village.
  • Inspections — Building work inside Diamond village.
  • Certificate of occupancy — Occupancy inside Diamond village.
  • Minimum dwelling size — Dwellings inside Diamond village.
16 more unanswered
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Driveway access
  • 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 Village of Diamond publishes no rule on the point, not that none exists. Grundy County’s page lists the county offices to call.

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