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Illinois Interior Designer Stamp Requirements

Board approved

Your Illinois Interior Designer seal from pedigitalstamps.com meets every requirement on this page — the required wording and the layout set out in 225 ILCS 310/4.1; 68 Ill. Adm. Code 1255.45. Fill in your details and download it in seconds.

The Illinois rules in full, with citations

Illinois licenses structural engineers under a separate Act with its own seal rule (68 Ill. Adm. Code 1480.145); a structural engineer's seal is not the PE seal below. Note also that the license expiration date has to sit next to the seal — a detail that catches out-of-state filers. The ILGA text of Section 4.1 carries the note "(Section scheduled to be repealed on January 1, 2027)" - the Act is subject to a sunset date, so the provision should be re-checked before that date. Section 1255.45 was last amended at 48 Ill. Reg. 12276, effective August 2, 2024. The statute is titled the Registered Interior Designers Act; IDFPR pages also refer to the profession's title act by its earlier name.

Interior Designer seal

Board:: Illinois Department of Financial and Professional Regulation, Division of Professional Regulation (advised by the Board of Registered Interior Design Professionals)
Rule:: 225 ILCS 310/4.1; 68 Ill. Adm. Code 1255.45
Diameter:: No diameter, dimension or shape is prescribed. Section 4.1 of the Registered Interior Designers Act states only that the seal be reproducible and describes its contents, and 68 Ill. Adm. Code 1255.45, the rule that implements it, adds a suggested facsimile design but no measurement.
Legend:: “Registered Interior Designer, State of Illinois”

"Every registered interior designer shall have a reproducible seal, or facsimile, the impression of which shall contain the name of the registered interior designer, the registration number, and the words "Registered Interior Designer, State of Illinois"." (225 ILCS 310/4.1)
"The registered interior designer shall affix the signature, current date, date of registration expiration, and seal to the first sheet of any bound set or loose sheets of interior technical submissions used as contract documents between parties to the contract or prepared for the review and approval of any governmental or public authority having jurisdiction by that registered interior designer or under that registered interior designer's responsible control. The sheet of interior technical submissions in which the seal is affixed shall indicate those documents or parts thereof for which the seal shall apply." (225 ILCS 310/4.1)
"The seal and dates may be electronically affixed. The registrant may provide, at the registrant's sole discretion, an original signature in the registrant's handwriting, a scanned copy of the document bearing an original signature, or a signature generated by a computer." (225 ILCS 310/4.1; 68 Ill. Adm. Code 1255.45(b))
"The individual registrant's written signature and date of signing, along with the date of registration expiration, shall be placed adjacent to the seal," and the rule reproduces a suggested facsimile showing the seal with signature, date signed and registration expiration lines beside it. (68 Ill. Adm. Code 1255.45(a), (c))
"All interior technical submissions issued by any corporation, partnership, or professional service corporation shall contain the corporate or assumed business name in addition to any other seal requirements set forth in this Act." (225 ILCS 310/4.1)
A registered interior designer shall not sign and seal interior technical submissions not prepared by or under the designer's responsible control, subject to the three exceptions in the Act for coordinated work of another registrant, adopted work not required to be prepared by a registered interior designer, and signing by a partner or corporate officer of a registered professional design firm. (225 ILCS 310/4.1(1), (2), (3))
"The registered interior designer exercising responsible control under which the interior technical submissions or portions of the interior technical submission were prepared shall be identified on the interior technical submissions or portions of the interior technical submissions by name and Illinois registration number." (225 ILCS 310/4.1)
A registrant who signs and seals submissions prepared under the registrant's responsible control by persons not regularly employed in the registrant's office must keep, and make available to the Board on request for at least 5 years, records demonstrating the nature and extent of that control. (225 ILCS 310/4.1)

Full Illinois Interior Designer seal requirements, with every citation →

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Who we are

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Our digital Illinois Interior Designer stamp generator creates instant state-approved electronic interior designer stamps. Our platform provides full customization of your digital seal, including an option to add your signature. Professional Engineer (PE) stamps, Architect stamps, and Land Surveyor stamps are available for immediate download after customization. There is no waiting. Every electronic professional seal we generate is 100% compliant with state board requirements, ensuring your digital stamp meets all necessary standards.

State boards

State board-approved, including

FAQ

Illinois Interior Designer Seal FAQs

Frequently asked questions about Illinois digital interior designer stamps and seals.

How do I obtain a digital Illinois interior designer seal or stamp?

Once you are licensed in Illinois, you can generate your seal here and download it immediately. Fill in the form and position your signature if you want one. The layout follows 225 ILCS 310/4.1; 68 Ill. Adm. Code 1255.45, which is the provision the Illinois Department of Financial and Professional Regulation, Division of Professional Regulation (advised by the Board of Registered Interior Design Professionals) will measure the seal against.

What are the requirements for the Illinois interior designer stamp or seal?

Illinois’ interior designer stamp rule is 225 ILCS 310/4.1; 68 Ill. Adm. Code 1255.45, administered by the Illinois Department of Financial and Professional Regulation, Division of Professional Regulation (advised by the Board of Registered Interior Design Professionals), a different body from the engineering board. The seal must carry “Registered Interior Designer, State of Illinois”, and no diameter, dimension or shape is prescribed. Section 4.1 of the Registered Interior Designers Act states only that the seal be reproducible and describes its contents, and 68 Ill. Adm. Code 1255.45, the rule that implements it, adds a suggested facsimile design but no measurement.

A further 8 requirements, each tied to the subsection that imposes it, are itemised in the Illinois requirements section on this page.

What size does an Illinois interior designer stamp have to be?

225 ILCS 310/4.1; 68 Ill. Adm. Code 1255.45 governs the Illinois interior designer’s seal but does not prescribe a diameter. Sizes quoted for Illinois elsewhere generally come from stamp suppliers’ catalogues rather than from the rule. What the rule does require is that your name and license number stay clearly legible.

Does an Illinois interior design seal have to show the registration expiration date?

The expiration date must appear, but it is placed adjacent to the seal along with the signature and date of signing rather than inside the seal impression, whose contents are fixed as the name, registration number and "Registered Interior Designer, State of Illinois." (225 ILCS 310/4.1; 68 Ill. Adm. Code 1255.45(a))

Must every sheet be sealed in Illinois?

No. The seal goes on the first sheet of the set, and that sheet must indicate the documents or parts for which the seal applies. (225 ILCS 310/4.1)

Interior Designer stamps in other states

Each state licenses interior designers under its own board and its own seal design. Every state below has its own interior designer stamp generator.

Compare every jurisdiction’s interior designer seal rule side by side →