Naperville, Illinois / Permit

1200 E DIEHL RD

#2018-00004175 · FIRE SUPPRESSION SYSTEM · COMMERCIAL ALTERATION/REPAIR (NO NEW SQ FTG)

Work described

Interior work

Read the complete work description in the official source.

Legacy source issue date: Dec 5, 2018
Source status: Check official source
Reported estimate: $1,000,000
First observed here: Oct 27, 2026
Last source check: Oct 27, 2026

Recorded companies

INTERIOR ALTERATIONS INC ↗
Source-recorded contractor name · Source name within Naperville; corporate identity and purchasing responsibility unverified.

Company contact routes

INTERIOR ALTERATIONS INC ↗ · Trade estimator or purchasing department

Suggested departments are research starting points. Printed roles and published company contacts do not establish project purchasing authority or an available package.

Find suppliers & services

Browse companies ↗

The checked permit scope does not support automatic service suggestions. Browse the directory to research companies directly.

Up to eight companies with potentially relevant offerings. Listing order does not establish company quality or availability. Confirm project requirements, products and availability. Suggestions do not establish a hiring relationship, open bid, construction start or readiness for cleaning.

Research this address

Address timeline and official history ↗

Source and coverage

Separate historical permit system, phased out during 2022–2024, with some later issue dates. Imported only as historical observations. Nonconstruction program and occupancy records are excluded. Separate permits and systems are not unique projects.

Naperville historical permit system ↗

Historical permit system; not current activity or a current validity check

Legacy printed numbers can be shared by trade permits; identity includes the official permit code

Legacy UTC-midnight source date retained without a local-time shift

Separate permits and permit systems must not be summed as unique projects

Source-supplied coordinates; parcel precision not verified

A record, hearing or estimate does not establish construction start, completion or buying intent.