Zoning, building permits and septic rules in Village of Westmont, Illinois

Village of Westmont’s own rules

• Local zoningPresent

  Land inside the Village of Westmont

  • Village board approved comprehensive amendments Aug 7, 2025 (Ord. 2025-105); maintenance amendments of May 28, 2026 are in effect but not yet codified in Municode; village directs use of the PDF dated May 28, 2026.

  “the amended zoning ordinance went into effect on august 25, 2025.”

• Zoning districtsPartial

  Zoning districts inside the Village of Westmont

  • District list and standards are in the zoning ordinance PDF and Municode; individual districts and dimensional standards were not opened in this job.

  “the approval revises uses, processes for approvals, and bulk standards in many existing zoning districts, as well as creates some new districts to spur development”

• Accessory dwellingsLimited

  ADUs on residentially zoned lots inside the Village of Westmont

  • Only on lots with a detached single-family house; no ADUs with townhouses, duplexes or multi-unit buildings.
  • Full regulations in Article VII, sections 7.02 and 7.05 of the zoning ordinance (not opened).

  “yes, the amendments allow for adus to be built on residentially zoned lots with a detached house (single-family). townhouses, duplexes, multi-unit buildings cannot have an adu.”

Still unanswered

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

• Building permit — Building permits inside Westmont village
• Owner-builder exemption — Owner-builder exemption inside Westmont village
• Building code adopted — Building code inside Westmont village
• Inspections — Building inspections inside Westmont village
• Certificate of occupancy — Certificates of occupancy inside Westmont village

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.

Off-grid gear

Going off-grid in Village of Westmont 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.

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