Action(s) initiated or orders passed

Date: 15 September, 2026 To, To, National Stock Exchange of India Ltd., BSE Limited Exchange Plaza, C-1, Block G, Phiroze Jeejeebhoy Towers Bandra Kurla Complex, Bandra (E), Dalal Street Mumbai – 400 051 Mumbai- 400001 NSE Scrip Symbol: INTERARCH BSE Scrip Code 544232 Sub: Disclosure under Regulation 30 read with Para A(19) and Para B(8) of Part A of Schedule III and Regulation 30(13) of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 – Receipt of notice under Section 142(1) of the Income-tax Act, 1961 for the block period 1 April 2019 to 17 October 2025 Dear Sir / Madam, This is reference to our earlier intimations dated 18th August 2025, 22nd August’2025 and 29th January’2026, regarding the search action initiated under Section 132 of the Income-tax Act, 1961 by the Income Tax Department Pursuant to Regulation 30 read with Para A(19) and Para B(8) of Part A of Schedule III of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 (“Listing Regulations”), and in continuation of our earlier intimations referred to above, we wish to inform you that, the Company has received on 15th September, 2026 at 9:46 A.M. (IST), through the e-Filing portal of the Income Tax Department, a notice dated 14 September, 2026 (DIN & Notice No. ITBA/AST/F/142(1)/2026-27/1093417308(1)) under sub-section (1) of Section 142 of the Income-tax Act, 1961 (“the Act”) from the Office of the Assistant Commissioner of Income Tax, Central Circle 7, Delhi, in connection with the assessment for the block period 1 April 2019 to 17 October 2025 under Chapter XIV-B of the Act, consequent to the search and seizure action conducted under Section 132 of the Act on 18 August 2025 in the case of the Company along with its associated entities and other related persons. The notice requires the Company to produce the accounts and documents, and to furnish the information (verified in the manner prescribed under Rule 14 of the Income-tax Rules, 1962), called for in the annexure to the notice, electronically through the “e-Proceedings” facility on or before 29 September, 2026 at 11:00 AM. The annexure sets out the issues identified by the Department during the search and post-search investigation, in respect of which issue-wise explanations and supporting documentary evidence have been sought, together with year-wise questionnaires relating to the returns of income for Assessment Years 2020-21 to 2025-26 and certain other matters. The notice does not determine any undisclosed income and does not raise any demand for tax, interest or penalty. INTERARCH BUILDING SOLUTIONS LIMITED (Formerly known as Interarch Building Products Limited) Head Office : B-30, Sector 57, Noida - 201301, India. Tel.: +91 120 4170200, CIN: L45201DL1983PLC017029 Registered Office: Farm No-8, Khasra No. 56/23/2, Dera Mandi Road, Mandi Village, Tehsil Mehrauli, New Delhi - 110047, India. The Company is examining the notice in consultation with its tax advisors and legal counsel and will file its response, with supporting documents, within the time allowed. The Company continues to cooperate fully with the Income Tax Department. The financial impact, if any, on the Company cannot be ascertained at this stage and would depend on the outcome of the block assessment proceedings. The details required under Regulation 30 of the Listing Regulation read with the SEBI Circular No. HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026 is given in Annexure A. The Company will keep the Stock Exchanges informed of further material developments in this matter in accordance with Regulation 30(7) of the Listing Regulation. This disclosure is also being made available on the website of the Company at www.interarchbuildings.com. Kindly take the above on record. Thanking you, Yours faithfully, For Interarch Building Solutions Limited (Formerly Known as Interarch Building Products Limited) ARVIND NANDA MANAGING DIRECTOR DIN: 00149426 Encl.: Annexure A INTERARCH BUILDING SOLUTIONS LIMITED (Formerly known as Interarch Building Products Limited) Head Office : B-30, Sector 57, Noida - 201301, India. Tel.: +91 120 4170200, CIN: L45201DL1983PLC017029 Registered Office: Farm No-8, Khasra No. 56/23/2, Dera Mandi Road, Mandi Village, Tehsil Mehrauli, New Delhi - 110047, India. Annexure A Disclosure of details as required under Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 read with the SEBI Master Circular No. HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026 Sr. No. Particulars Details a) Name of the authority Office of the Assistant Commissioner of Income Tax, Central Circle 7, Delhi, Income Tax Department, Ministry of Finance, Government of India. b) Nature and details of the Notice dated 14 September 2026 under sub-section (1) of action(s) initiated or order(s) Section 142 of the Income-tax Act, 1961 (DIN & Notice No. passed ITBA/AST/F/142(1)/2026-27/1093417308(1)), issued in connection with the assessment for the block period 1 April 2019 to 17 October 2025 under Chapter XIV-B of the Act, consequent to the search and seizure action conducted under Section 132 of the Act on 18 August 2025 in the case of the Company along with its associated entities and other related persons. The notice requires the Company to (a) produce the accounts and documents called for in the annexure to the notice; and (b) furnish the information called for in the annexure, verified in the manner prescribed under Rule 14 of the Income-tax Rules, 1962, electronically through the “e-Proceedings” facility on the e-Filing portal, on or before 29 September 2026 at 11:00 AM. c) Date of receipt of direction or 15th September 2026 at 9:46 A.M. (IST), received through order, including any ad-interim the e-Filing portal of the Income Tax Department or interim orders, or any other communication from the authority d) Details of the violation(s) / The notice requires the Company to produce the accounts contravention(s) committed or and documents, and furnish the information (verified in the alleged to be committed manner prescribed under Rule 14 of the Income-tax Rules, 1962), called for and seeks issue-wise explanations and supporting documentary evidence in respect of the issues identified by the Department during the search and post- search investigation INTERARCH BUILDING SOLUTIONS LIMITED (Formerly known as Interarch Building Products Limited) Head Office : B-30, Sector 57, Noida - 201301, India. Tel.: +91 120 4170200, CIN: L45201DL1983PLC017029 Registered Office: Farm No-8, Khasra No. 56/23/2, Dera Mandi Road, Mandi Village, Tehsil Mehrauli, New Delhi - 110047, India. Sr. No. Particulars Details e) Impact on financial, operation Not ascertainable at present. The notice is a call for or other activities of the listed information and explanations at the inquiry stage of the entity, quantifiable in block assessment proceedings; no undisclosed income has monetary terms to the extent been determined and no demand for tax, interest or possible penalty has been raised. INTERARCH BUILDING SOLUTIONS LIMITED (Formerly known as Interarch Building Products Limited) Head Office : B-30, Sector 57, Noida - 201301, India. Tel.: +91 120 4170200, CIN: L45201DL1983PLC017029 Registered Office: Farm No-8, Khasra No. 56/23/2, Dera Mandi Road, Mandi Village, Tehsil Mehrauli, New Delhi - 110047, India.