Planning, Building & Development (Building & Engineering)
2Use this category to organize the project documents and approvals you may need.
Lake County, IL permit planning guide
Start with your property address to identify the offices, approvals, and project documents that apply in Lake County, IL.
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catalog workflows
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project checks
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villages with a guide
Best first step
Find the approvals for your parcel, not just a generic form.
Start by confirming whether the parcel is in an unincorporated area and whether county shoreland, sanitary, floodplain, or land-division review applies. A city or village may still administer the building permit.
Prefills Lake County, IL Checks authority by address
What are you building?
Choose a common project or enter any description on the next screen.
Key permit triggers
| Project | Permit needed when | Authority |
|---|---|---|
| Zoning / Land-Use Review | A Lake County zoning review under the Unified Development Ordinance (Ch. 151; confirming the AG/RE/E/R1..R6/RR district setbacks, Max ISR, height and use) is performed with the building permit on UNINCORPORATED county land. A Site Development Permit may also apply. | Lake County Planning, Building & Development (PB&D) |
| Building Permit (Deck) | A deck requires a building permit (accessory structure). An open deck may encroach <=4 ft into a required setback and must be >=4 ft from all lot lines (§ 151.131); a covered/roofed accessory structure needs >=6 ft side/rear (§ 151.113(C)(2)(a)). Counts toward ISR. | Lake County Planning, Building & Development (PB&D) |
| Fence Registration / Permit | A PERIMETER residential fence is a $35 over-the-counter Registration (not a full permit); an interior/other fence is a fence permit priced by lineal foot. Max height 6 ft (6 ft 6 in if elevated for drainage; up to 8 ft with PB&D Director approval, or between residential and non-residential uses). Permitted in any required setback EXCEPT visibility triangles (§ 151.172); finished side faces outward. | Lake County Planning, Building & Development (PB&D) |
| Building Permit (Shed / Accessory Building) | A shed <=100 sq ft is a $35 Registration; a larger shed / any detached garage is a building permit (accessory building). Max 3 accessory buildings per residential lot; total accessory GFA <=1.5x principal GFA (§ 151.113(B)(5)(b),(7)(a)). Accessory height <=25 ft (RE/E/R1-R6/RR) or 30 ft (AG); setback = the district front setback with >=6 ft side/rear (§ 151.113(C)). | Lake County Planning, Building & Development (PB&D) |
| Building Permit (Detached Garage) | A detached garage requires a building permit (accessory building). Same § 151.113 accessory bulk/setback rules as a shed (>=6 ft side/rear; height <=25 ft; max 3 accessory buildings; accessory GFA <=1.5x principal). | Lake County Planning, Building & Development (PB&D) |
| Building Permit (Addition) | A building addition requires a building permit and must meet the FULL district dimensional standards (setbacks/height/Max ISR, § 151.125); an enclosed addition does not get the open-deck encroachment allowance. | Lake County Planning, Building & Development (PB&D) |
| Building Permit (Basement / Interior Alteration) | An interior alteration affecting walls/egress/structural, or adding electrical/plumbing/mechanical, requires a building permit. A basement is a principal-building feature — "A basement shall not be permitted in any accessory structure" (§ 151.113(B)(8)). No new district setback impact; an egress window may need a well. | Lake County Planning, Building & Development (PB&D) |
| Accessory Dwelling Unit Permit (conditional) | An accessory dwelling unit is an ALLOWED accessory use but ONLY in the AG, RE, E and R-1 districts on lots >=80,000 sq ft; <=1 bedroom, <=1,000 sq ft GFA, owner must occupy the principal or the ADU, max 1 ADU per lot (§ 151.113(D)). A building permit is required; the ADU is subject to the underlying district's principal setbacks + ISR and the accessory height (25/30 ft). | Lake County Planning, Building & Development (PB&D) |
Triggers reflect county-level baselines. Incorporated cities and villages may set stricter local rules, and no fee or review window is published here because none is held at county level.
How to use this Lake County, IL page
Illinois has no single statewide residential building code — municipalities (many home-rule) adopt and enforce their own codes. Statewide minimums include the Illinois Plumbing Code (IDPH, licensed plumbers required), the Illinois Energy Conservation Code, and the Illinois Accessibility Code. Zoning, signs, fences, and right-of-way permits are entirely local.
- Start with the parcel location. County authority can differ inside the same county depending on whether the site is in an incorporated city, village, town, or unincorporated area.
- Use this page as a readiness checklist before any phone calls so you can submit complete, accurate information to the right office.
- Flag overlays early—shoreland, floodplain, roads, drainage, septic, and access approvals can add extra approvals that are easy to miss.
- Gather owner information, a rough site plan, and project scope details before contacting agencies.
- Validate the final office list with Permit Check once your parcel and project context are captured.
A practical Lake County, IL sequence
This is a preparation sequence, not a claim that Lake County, IL issues every listed approval. Permit Check confirms the issuing authority for the parcel before filing.
- Confirm the parcel, municipality, project scope, and any county or state overlay before choosing an application.
- Gather the site plan, project dimensions, ownership information, and any trade or contractor details the office requests.
- Resolve prerequisite zoning, shoreland, floodplain, sanitary, access, or land-use reviews before the building application when applicable.
- Submit each approval to the office that issues it and keep the records together through inspections and closeout.
Villages in Lake County, IL
2 with a permit guideCities and villages are indexed statewide rather than by county — search them on the Illinois page.
What this county may handle
These references and project checks help you identify county-level steps before you contact the issuing office. A city, village, town, or state agency may handle other approvals for the same project.
Offices that may be involved
- Lake County Planning, Building & Development (PB&D): Accessory Dwelling Unit Permit (conditional)
Packet requirements
- Online permit application (Tyler EnerGov CSS): Apply on the Lake County Online Permit ePortal (lakecountyil-energovpub.tylerhost.net) or in person at the Central Permit Facility; pay fees at application (check/cash/credit).
- Three (3) site plans (setbacks of all structures): Three (3) site plans showing the location, dimensions and setbacks of all existing and proposed structures; a grading plan may be required.
- Building-plan sets (2, or 4 in the floodplain): Two (2) complete sets of building plans (four (4) if the parcel is in the floodplain).
- Signed/sealed truss certificate: Applies to: conditional. Truss design drawing with a truss certificate signed/sealed by an Illinois-registered structural engineer or architect.
- C&D recycling report / plan (project >=1,500 sf): Applies to: conditional. Construction & Demolition Debris Recycling Compliance Report + Plan for projects >=1,500 sf GFA, submitted >=10 business days before final inspection.
- Zoning (UDO) compliance review: PB&D reviews UDO compliance (setbacks, Max ISR, use) with the building plan review; a Site Development Permit review is triggered where applicable. Turnaround ~10 business days (residential solar ~3).
Fee schedules
- Building Permit (residential): Lake prices building work by VOLUME/valuation formulas the flat schema cannot encode: 1&2-family $78 per 1,000 cu ft (min $98); accessory $34 per 1,000 cu ft (min $44); repairs/alterations $20 per $1,000 est. cost (min $88) — recorded on the deck/shed/addition/basement trigger notes. Do not present $0; confirm the applicable line before quoting.
- Fence Registration / Permit: Base fee $35 · minimum $35 · Flat $35 over-the-counter Registration for a perimeter residential fence. An interior/other fence is a fence permit priced by lineal foot (0-299 lf $44 / 300-599 $84 / >600 $127 — not seeded; the flat schema seeds the $35 registration). Height per § 151.113(L).
- Swimming Pool Permit (in-ground): Base fee $175 · minimum $175 · Seeded as in-ground (submerged) $175. Above-ground pool (>24 in deep or >250 sf) $88 is noted here (one flat per permit_id). Plumbing above-ground $94 / below-ground $189; pool-pump electrical alteration $98. Accessory zoning review $67.
What the catalog covers first
1 categoriesUse this index as a preparation checklist before visiting any external form pages.
Lake County, IL permit FAQ
What does this Lake County, IL County page provide?
Lake County, IL County page gives you a workflow scaffold: what permit families to expect, how to order them, and what to validate before you submit.
How do I avoid sending applications to the wrong office first?
Use the readiness sequence above, then run Permit Check to confirm your parcel's authority mix. That combination is usually the biggest reason applications get delayed. For Lake County, IL, the same project can still require more than one office.
How should I use the official sources on this page?
Use them to confirm the current application, office contact, adopted fee schedule, and project-specific instructions before filing or paying a fee.
Next-step resources on GovCodex
Find the right permitting authority
Use parcel-level logic to identify every department your project touches.
Open permit checkDo I need a permit?
Get a practical rule set before filing any forms.
Read guideHow to apply for a permit
Learn the sequence of documents and process checkpoints.
Read guideHow long does a permit take?
Set realistic expectations for review windows.
Read guidePermit type explorer
Cross-check common permit families and filing patterns.
Open explorerOfficial sources
Confirm the current office instructions, application version, and adopted fee schedule before filing.
The catalog below organizes common county-level workflows. Use Permit Check to confirm which office handles each approval for your property and project.
Preparation library
Browse forms only when you need them
Search by project or approval. Official forms and adaptable state templates are labeled separately.
Showing forms that match your project search.
Building Permit Application (Unincorporated)
Use this official form when preparing your project submission.
Fence Registration / Permit (Unincorporated)
Use this official form when preparing your project submission.
Related guides
Browse all guides →Get your answer
Skip the directory — check your exact address
Tell GovCodex your project and location. You get the permit list, the offices that issue each approval, and the sources behind them for your parcel.
Example question
Do I need a permit for a 6 ft fence in my back yard?
Height rulesSetbacksFees